Short Answer

The highest temperature in Los Angeles on October 31, 2026, is likely to be 71°F or above, with the market pricing this outcome at 65.0%.

1. Market Behavior & Drivers

The market's most significant move, a 9.0 percentage point spike on October 30, 2026, lacks an identifiable driver in public reporting. The move, which lifted the probability of a high of "71° or above" from 58.0% to 67.0%, ran counter to available weather data. Forecasts for central Los Angeles and Little Tokyo on October 31 indicated cooler highs of 67°F and 69°F, respectively. No specific news or social media activity appears to coincide with the price increase.
This market resolves based on temperature observations from the Los Angeles International Airport (KLAX) station, a specific location that can vary from other regional forecasts. The National Weather Service's preliminary climate report for October did not include the October 31 high, which is standard procedure and not a market-moving event. The price has since settled slightly lower at 66.0%.
  • The 71°F or above outcome is favored by KLAX's October 31, 2026 forecast.
  • 67-69°F highs are indicated by Weather Underground, with showers and cloud cover.

Who Wins and Why

Outcome Market Model Why
71° or above 65.0% 61.5% Late October often sees temperatures above 70°F in Los Angeles, potentially due to Santa Ana winds.
69° to 70° 27.0% 31.4% This range aligns with the historical average maximum temperature for late October in Los Angeles.
67° to 68° 5.0% 3.8% Increased coastal influence or persistent marine layer could keep temperatures in this slightly cooler range.
65° to 66° 2.0% 1.4% A strong, persistent marine layer or an early-season cold front could bring cooler air to this range.
63° to 64° 1.0% 0.7% A robust cold front, persistent cloud cover, or deep marine layer could bring this significantly cooler day.

Current Context

The highest temperature in Los Angeles on October 31, 2026, was not officially observed by late October. The National Weather Service preliminary climate report, covering October 1–28, 2026, did not include an observed October 31 high [1]. Prediction markets define "Los Angeles" as routine METAR observations from the Los Angeles International Airport (KLAX) station, a distinction critical given regional temperature variations [2]. Forecasts for central Los Angeles on October 31, 2026, indicated highs near 67°F, with cloudy skies and showers. The Little Tokyo forecast was marginally warmer at 69°F [3][4][5][6]. LAX-area forecasts projected a maximum around 21°C, approximately 70°F, with likely rain; WeatherCrisp cited a 21°C maximum and Foreca listed an afternoon temperature of 70°F [7][8].
Prediction markets showed varied expectations but generally lower than historical averages. Polymarket assigned 48% odds to 70–71°F, 37.5% to 68–69°F, and 10.5% to 72–73°F [2]. Kalshi contracts indicated 70% probability for 71°F or above, 27% for 69–70°F, and 6% for 67–68°F [9]. Robinhood listed contracts for >69°F, >70°F, and >71°F [10]. Historically, October 31 at LAX records an average high of 73.5°F, with an interquartile range of 68.8–78.3°F. The record high for this date was 90°F in 1949 [11].
The pre-resolution estimate places the KLAX daily high in the upper 60s to low 70s Fahrenheit. The range of 70–71°F represents the strongest market-supported outcome [3][7][8][2][9]. This figure is a forecast and market estimate, not a confirmed observation.
Sources (11)
  1. 1National Weather Serviceforecast.weather.gov
  2. 2Highest temperature in Los Angeles on October 31: 70-71°F 48% - Polymarket Oddspolyinsider.io
  3. 3Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  4. 4Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  5. 5Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  6. 6Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  7. 7Tomorrow's Weather in Los Angeles International Airport - Hourly Forecast and Conditionsweathercrisp.com
  8. 8Hourly weather tomorrow in Los Angeles - Foreca.netforeca.net
  9. 9Highest temperature in Los Angeles tomorrow? Odds & Predictions 2026kalshi.com
  10. 10October 31, 2026: Los Angeles Daily Temperature High October 31 2026 Prediction Marketrobinhood.com
  11. 11October 31 - Los Angeles International Airport - Weather History and Averages - Overcast Dataovercastdata.com

2. Price Chart

Historical Price (Probability)

Outcome probability
Date

3. Significant Price Movements

Notable price changes detected in the chart, along with research into what caused each movement.

📈 October 30, 2026: 9.0pp spike

Price increased from 58.0% to 67.0%

Outcome: 71° or above

What happened: Based on the provided web research, no identifiable social media activity or traditional news announcement appears to be the primary driver of the reported 9.0 percentage point spike for the "71° or above" outcome on October 30, 2026 [1][2][3][4]. In fact, available forecasts for October 31, 2026, indicated cooler temperatures around 67°F with rain, which would typically depress the probability of a high of 71°F or above [5][6][7][8][9][10]. No credible source established a specific social media or news catalyst tied to this market movement [1][2][3][4]. Therefore, social media was likely irrelevant.
Sources (10)
  1. 1Highest LA Temperature on October 30: Will 72-73°F Win? Odds | Lines.comlines.com
  2. 2October 30, 2026: Los Angeles Daily Temperature High October 30 2026 Prediction Marketrobinhood.com
  3. 3Friday, October 30, 2026 – LA News Centrallanewscentral.com
  4. 4As unusual low-latitude storm approaches SoCal and threatens serious Four Corners flood risk once again, record-warm and record-high ocean conditions persist along CA coast amid still-strengthening El Niño - Weather Westweatherwest.com
  5. 5Saturday, October 31, 2026 - Los Angeles, California, United Statesskytime.earth
  6. 6Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  7. 7Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  8. 8Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  9. 9Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  10. 10LA Halloween forecast: Rain storm to bring wet weekend across Southern California | FOX 11 Los Angelesfoxla.com

4. Market Data

Contract Snapshot

This market resolves to "Yes" for a specific contract if the highest temperature recorded in Los Angeles on October 31, 2026, falls within that contract's stated range, otherwise it resolves to "No." Trading begins on October 31, 2026, at 3:00 am EDT, with a maximum payout date of November 1, 2026. If a material error is found in the initial temperature data, resolution may be delayed until a corrected revision or the Expiration Date, with markets resolving to the last fair price determined by the platform if no data becomes available.

Available Contracts

Market options and current pricing

Outcome bucket Yes (price) No (price) Last trade probability
71° or above $0.66 $0.35 65%
69° to 70° $0.27 $0.74 27%
67° to 68° $0.05 $0.96 5%
65° to 66° $0.02 $0.99 2%
62° or below $0.01 $1.00 1%
63° to 64° $0.01 $1.00 1%

Market Discussion

Prediction markets generally indicate a highest temperature around 69–71°F for Los Angeles on October 31, 2026, with Kalshi showing 70% for 71°F or above and Robinhood contracts reflecting similar expectations [1]. Weather forecasts for October 31, 2026, vary from 66°F to 73°F across different Los Angeles locations, with a forecast for Los Angeles International Airport projecting a maximum of approximately 70°F with rain; notably, the relevant Robinhood contract resolves using data from the Weather Underground Los Angeles International Airport (KLAX) station [2]. Historically, the typical high for October 31 in Los Angeles is estimated at 76°F, which is warmer than current forecasts [3].

Sources (3)
  1. 1Highest temperature in Los Angeles tomorrow? Odds & Predictions 2026kalshi.com
  2. 2Los Angeles, CA Weather Conditions | Weather Undergroundwunderground.com
  3. 3October 31 Weather in Los Angeles, CA — What to Expectweatheronthisday.com

5. Trust Index

Octagon Trust Index Kalshi 66 Caution

Integrity risk· Resolution quality

How it adds up
Integrity80% of score75Good

Resolution quality is low (30), but Integrity averages all three scores, so the other two pull it up. Only a critically low score would cap the total.

Trade quality20% of score31High Risk

Includes the cost to trade: a $10,000 order can't be filled here because the order book is too thin.

Trust score66Caution

Weighted blend with hard caps — a critically weak safety pillar, or a severe trading anomaly, caps the total regardless of the rest. Full methodology · About the Trust Index

Trust profile
Integrity4 screens run · 5 don't apply · 1 awaiting data
Market integrity
94Strong

Outcome is hard to influence

No suspicious activity on any screen

Screened clean
Large tradesNo single trade dominates the tape. Clear
Thin-volume movesMoves carried volume Clear
Size patternsNo distribution read Clear
2 screens not run
Outcome control · doesn't apply to this market type
Thin-leg conviction · doesn't apply to this market type
Info fairness
85Strong

No privileged early knowledge

No suspicious activity on any screen

Screened clean
Information exposureNo concentrated group can know the outcome materially early. Clear
4 screens not run
Move vs. catalyst · doesn't apply to this market type
Longshot repricing · doesn't apply to this market type
Pre-broadcast certainty · doesn't apply to this market type
Cross-venue timing · data source not connected
Resolution quality
30High Risk

No suspicious activity on any screen

Settlement depends on interpretation — verify the rules and source before trading.

Resolution rules read: Ambiguous

Liquidity
73Tradeable

Fills fine at modest size

6 contracts · worst first

67° to 68°5
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

65° to 66°5
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

62° or below32
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

63° to 64°34
Very thin · low confidence

Light recent trading — size may not fill near the screen price.

69° to 70°76
Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

71° or above82
Deep · high confidence

Typical bar range 2.2% of price over 15 traded bars

24h traded notional $2,687 · 24h
Move quality
40Mixed

Some moves lacked volume

6 contracts · worst first

65° to 66°40
Mixed · high confidence

Volume opposes the move over 6h

71° or above—
No significant move (6h)

Price was stable over the last 6 hours.

69° to 70°—
No significant move (6h)

Price was stable over the last 6 hours.

67° to 68°—
No significant move (6h)

Price was stable over the last 6 hours.

62° or below—
No significant move (11h)

Price was stable over the last 11 hours.

63° to 64°—
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
40Ambiguous

Counts toward Resolution quality, not here

6 contracts · worst first

71° or above40
Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
69° to 70°40
Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
67° to 68°40
Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
65° to 66°40
Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
62° or below40
Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
63° to 64°40
Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
Trade quality
31High Risk

Order book is critically thin

Thin market — entering or exiting at fair value will be difficult.

Outcome quality 39 (notional-weighted across 6 scored legs)

$100 order: 2.3c slippage (~4% of a 65.5c contract)

$1,000 order: 5.3c slippage (~8% of a 65.5c contract)

$10,000 order: book too thin to fill

71° or abovePrimary40Market scoreLiquidity82Move quality–Rule clarity40
Why 40
Liquidity
82 · Deep · high confidence

Typical bar range 2.2% of price over 15 traded bars

24h traded notional $2,687 · 24h
Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
40 · Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
69° to 70°40Market scoreLiquidity76Move quality–Rule clarity40
Why 40
Liquidity
76 · Tradeable · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
40 · Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
67° to 68°5Market scoreLiquidity5Move quality–Rule clarity40
Why 5
Liquidity
5 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
40 · Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
65° to 66°5Market scoreLiquidity5Move quality40Rule clarity40
Why 5
Liquidity
5 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
40 · Mixed · high confidence

Volume opposes the move over 6h

Rule clarity
40 · Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
62° or below32Market scoreLiquidity32Move quality–Rule clarity40
Why 32
Liquidity
32 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (11h)

Price was stable over the last 11 hours.

Rule clarity
40 · Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear
63° to 64°34Market scoreLiquidity34Move quality–Rule clarity40
Why 34
Liquidity
34 · Very thin · low confidence

Light recent trading — size may not fill near the screen price.

Move quality
No significant move (6h)

Price was stable over the last 6 hours.

Rule clarity
40 · Ambiguous · low confidence

Outcome language is subjective — the result is a judgment call.

objective outcome · Flaggedofficial source · Uncleartime boundary · Clear

underwriting_v1.4 · computed Oct 31, 2026

6. How do historical October 31 temperature records for KLAX since 2000 compare to the current 2026 forecast consensus?

2026 October 31 Forecast71°F or above [1][2]
2025 October 31 Observed High (KLAX)71°F [3][1][2][4]
October 30 Climatological High73.5°F [3][1][2][4]
The 2026 October 31 forecast favors 71°F or higher at KLAX. The prediction market consensus for October 31, 2026, in Los Angeles (KLAX) projects a high temperature of 71°F or above [1][2]. This forecast aligns with the 2025 observed high of 71°F at KLAX for the same date [3][1][2][4]. It also stands slightly below the broader late-October climatological high benchmark, which is 73.5°F for October 30 [3][1][2][4].
A complete historical temperature comparison since 2000 is unavailable. A full comparison of KLAX October 31 temperature records from 2000 to the current 2026 forecast consensus is not fully achievable with the available research [5][4]. The retrieved sources do not expose a comprehensive year-by-year series for October 31 from 2000 through 2025, thus preventing the calculation of a precise historical mean, median, or range [5][4]. Despite this data limitation, the 2026 consensus forecast of at least 71°F is considered climatologically plausible rather than an extreme projection [3][1][2][4]. Its plausibility is supported by its consistency with the 2025 observed high and its position slightly below the long-term average high for October 30 [3][1][2][4].
October 31 generally represents the cooler end of the month. According to October climatology, October 31 at KLAX is typically near the cooler end of the month, with the station's average low temperature for that date being 55.4°F [3]. Achieving a complete historical comparison since 2000 would necessitate extracting daily KLAX observations for October 31 for each year between 2000 and 2025, utilizing frameworks such as nClimGrid-Daily or NCEI's daily-record system accessible via CDO [3][1][2][4][6][7][8].
Sources (8)
  1. 1Highest temperature in Los Angeles on Oct 31, 2026?… | Frenzy Capitalfrenzycap.com
  2. 2Weather & Climate Prediction Markets — Live Odds | Frenzy Capitalfrenzycap.com
  3. 3October - Los Angeles International Airport - Weather History and Averages - Overcast Dataovercastdata.com
  4. 4Los Angeles, CA Weather History | Weather Undergroundwunderground.com
  5. 5IEM:: Tabular CLI Report Datamesonet.agron.iastate.edu
  6. 6nClimGrid-Daily | National Centers for Environmental Information (NCEI)ncei.noaa.gov
  7. 7Daily Weather Recordsncei.noaa.gov
  8. 8Search | Climate Data Online (CDO) | National Climatic Data Center (NCDC)ncei.noaa.gov

7. How do the long-range October 2026 outlooks from the GFS and European (ECMWF) weather models compare for Southern California?

CPC October Temperature Outlook for CaliforniaFavored above-normal monthly mean temperatures [1]
Late-October Southern California WeatherShort-range storm/moisture signal expected by Oct 27-30 [2][3]
LA Oct 31 High Temperature (Market Implied)71°F or above at 62-66% probability [4][5]
Direct GFS and ECMWF model comparisons are unavailable for late October 2026. Official discussions do not provide a verifiable, point-specific GFS and ECMWF deterministic high temperature comparison for Southern California on October 31, 2026 [6]. The Climate Prediction Center (CPC) utilizes ensemble and model blends for extended ranges, combining guidance from GEFS, ECMWF, and Canadian models rather than relying on a single authoritative run [6]. The CPC's broader October outlook synthesized various guidance and climate signals, including a strong El Niño, instead of offering a singular deterministic GFS-versus-ECMWF forecast [1].
Broader October outlooks suggest above-normal temperatures for Southern California. The NOAA CPC's September 30, 2026, October outlook indicated above-normal monthly mean temperatures across nearly all areas west of the Continental Divide, with the highest probabilities over California, western Nevada, and southern Oregon [1]. For precipitation, the CPC favored below-normal conditions along most of the West Coast, although it noted early-October wetness in the southern tier was front-loaded and Southern California retained tropical-cyclone-related uncertainty [1]. Non-government seasonal sources provided inconsistent views, with one describing California's October as cooler than average and another emphasizing a transition toward wetter or more changeable conditions [7][8].
A late-October storm signal could influence Southern California temperatures. For the specific end of October, Southern California was projected to experience a short-range storm or moisture signal by October 27-30, 2026, which included a marginal excessive-rainfall risk near southeastern California and an unusual low-latitude storm approaching the region [2][3]. This late-month event was considered more relevant for suppressing local daytime highs on October 31 than a month-scale model signal [3]. A non-operational specialized long-range forecast for nearby San Diego projected a 76°F high on October 31, 2026, suggesting a broadly seasonal-to-warm outcome, but this was not an official GFS or ECMWF forecast for Los Angeles [9]. A prediction market snapshot indicated 71°F or above as the leading Los Angeles October 31 outcome at approximately 62-66%, with 69-70°F as the runner-up around 30%, reflecting market-implied probability rather than direct model output [4][5].
Sources (9)
  1. 1Climate Prediction Center - Seasonal Outlookcpc.ncep.noaa.gov
  2. 2CW3E Precipitation Outlook: 27 October 2026 - Center for Western Weather and Water Extremescw3e.ucsd.edu
  3. 3As unusual low-latitude storm approaches SoCal and threatens serious Four Corners flood risk once again, record-warm and record-high ocean conditions persist along CA coast amid still-strengthening El Niño - Weather Westweatherwest.com
  4. 4Highest temperature in Los Angeles on Oct 31, 2026?… | Frenzy Capitalfrenzycap.com
  5. 5Weather & Climate Prediction Markets — Live Odds | Frenzy Capitalfrenzycap.com
  6. 6Climate Prediction Center - 6-14 Day Prognostic Discussionm.daculaweather.com
  7. 7Old Farmer’s Almanac releases California fall 2026 forecastdesertsun.com
  8. 8Weather Outlook — July 21 - August 22, 2026 | California Avocado Growerscaliforniaavocadogrowers.com
  9. 9October 2026 Daily Weather Forecast for 92126 (San Diego), California – Plan Aheadweathertab.com

8. What specific weather patterns, such as a Santa Ana wind event or an early-season storm, could cause a significant deviation from the forecast high at KLAX?

Forecast High KLAX (Oct 31, 2026)71°F or above (Prediction Market) [1][2]
Santa Ana Wind Main SeasonOctober to March [3][4]
Historical October High (LA)97°F (Oct 21) [5][4]
Significant deviations from KLAX's forecast high are plausible. The leading prediction market outcome for KLAX on October 31, 2026, anticipates a high of 71°F or above, though this coastal forecast is notably susceptible to a sudden weather regime shift [1][2][3][5][4]. A substantial departure from this prediction could result from a Santa Ana wind event, leading to warmer conditions, or an early-season Pacific trough or cutoff low, which would result in cooler temperatures [3][5][4][6].
Santa Ana wind events cause the clearest warm-side deviation risk. October falls within the primary season for Santa Ana events, which typically run from October to March [3][4]. This pattern involves offshore downslope flow driven by strong high pressure over the Great Basin, usually bringing very warm, dry conditions to coastal Southern California for one to five days [3][4]. Key characteristics of this phenomenon include cold high pressure building over the Great Basin, a tightening offshore or easterly pressure gradient, northeast winds, clearing skies, a suppressed marine layer, and sharply lower humidity [5][4]. Historical National Weather Service (NWS) data shows October occurrences with regional highs exceeding 100°F and a Los Angeles high of 97°F on October 21, indicating that extreme warm departures are physically possible, potentially driving KLAX temperatures into the 80s or higher if the offshore gradient is sufficiently strong [3][5][4].
Pacific troughs or cutoff lows present the main cool-side risk. An early-season Pacific trough or cutoff low traversing Southern California is the primary factor for cool-side deviations [5][6]. Such a weather pattern would introduce increased clouds, marine air, precipitation, and onshore flow, thereby limiting daytime heating and potentially pushing KLAX temperatures materially below a low-70s forecast [5][6]. NWS observations illustrate recent December rain events at LAX coinciding with lower high temperatures, and the conclusion of Santa Ana conditions frequently transitions to onshore flow, increased humidity, and cooler temperatures [5][6]. This scenario creates a downside risk, with temperatures potentially lowering into the 60s if persistent clouds and rain occur through the peak heating period [3][5][4].
Sources (6)
  1. 1Highest temperature in Los Angeles on Oct 31, 2026?… | Frenzy Capitalfrenzycap.com
  2. 2Weather & Climate Prediction Markets — Live Odds | Frenzy Capitalfrenzycap.com
  3. 3Santa Ana Events in California: Global Scale Teleconnections and Potential Subseasonal to Seasonal Predictabilityweather.gov
  4. 4ESF[Type the document title]weather.gov
  5. 5Southern California Wildfires NWS Service Assessment Report 2003weather.gov
  6. 6National Weather Serviceforecast.weather.gov

9. Where can the official hourly METAR observation reports for KLAX be accessed on October 31, 2026 to track the market's resolution?

Primary Data SourceNOAA/NWS official METAR observation reports for KLAX [1][2][3][4]
Data TrackedHighest reported KLAX temperature for October 31, 2026 [1][2][3][5][6]
Timestamp FormatUTC (requires conversion to Los Angeles local time) [1][4]
Official KLAX METAR reports are available from NOAA/NWS sources. Hourly METAR observation reports for KLAX on October 31, 2026, can be accessed primarily through NOAA/NWS decoded feeds and the NWS Weather.gov Time Series Viewer [1][2][3][4]. These resources are crucial for tracking the highest reported KLAX temperature, which is relevant to the resolution of specific prediction markets [1][2][3][5][6]. The NWS Weather.gov Time Series Viewer, specifically, supports historical data ranges up to 30 days and allows users to filter hourly observations for precise dates, such as October 31, 2026 [1][2][3][4].
METAR data requires UTC conversion and careful preservation for market settlement. When determining the day's maximum temperature, it is important to note that METAR timestamps are provided in Coordinated Universal Time (UTC) and will require conversion to Los Angeles local time [1][4]. For auditability, particularly as prediction markets settle for October 31, 2026, and list specific temperature outcome brackets, it is recommended to preserve the original coded METAR strings along with their UTC timestamps [1][2][3][5][6]. While these are recognized as official observational sources, the ultimate determination of the highest reported KLAX temperature must align with the prediction market's specified settlement methodology, which remains the controlling factor [1][2][3].
Sources (6)
  1. 1https://tgftp.nws.noaa.gov/data/observations/metar/decoded/KLAX.TXTtgftp.nws.noaa.gov
  2. 2Time Series Viewerweather.gov
  3. 3METAR and TAF Dataaviationweather.gov
  4. 4https://tgftp.nws.noaa.gov/data/raw/sa/saus46.klox.mtr.lax.txttgftp.nws.noaa.gov
  5. 5Highest temperature in Los Angeles on Oct 31, 2026?… | Frenzy Capitalfrenzycap.com
  6. 6Weather & Climate Prediction Markets — Live Odds | Frenzy Capitalfrenzycap.com

10. What is the typical temperature difference between inland Los Angeles areas and the coastal KLAX station on a late October afternoon?

Typical Inland-KLAX Temperature Differencearound 7°F [1][2]
KLAX High (when inland is 76-80°F)69-73°F [1][2]
Market Favoring 71°F or Above (Oct. 31, 2026)62% [1][3]
Inland Los Angeles areas are typically warmer than the coastal KLAX station. On a late October afternoon, there is an approximate 5–10°F temperature difference, with 7°F serving as a central estimate [1][2]. This distinction is primarily due to the marine influence that consistently moderates temperatures at KLAX's coastal location [3][4]. Consequently, when inland areas experience high temperatures near 76–80°F, the KLAX station generally records highs around 69–73°F [1][2].
Prediction markets for Los Angeles high temperatures align with coastal KLAX readings. The settlement for these markets is evidently tied to observations from the coastal KLAX/LAX station [1][3]. It is important to note that warmer inland Los Angeles readings do not correspond to the KLAX settlement temperature, even though inland neighborhoods often register several degrees higher [1][3]. A market range centered around 69–71°F is consistent with the expected coastal moderation [1][3]. For example, as of October 31, 2026, the market indicated a preference for 71°F or above (62%) compared to 69–70°F (30%) [1][3].
Sources (4)
  1. 1Highest temperature in Los Angeles on Oct 31, 2026?… | Frenzy Capitalfrenzycap.com
  2. 2Weather & Climate Prediction Markets — Live Odds | Frenzy Capitalfrenzycap.com
  3. 3National Weather Serviceforecast.weather.gov
  4. 4National Weather Serviceforecast.weather.gov

11. What Could Change the Odds

Key Catalysts

Weather Underground forecasts for Saturday, October 31, 2026, in central Los Angeles indicate daytime highs around 67–69°F, accompanied by showers and cloud cover [1][2][3][4]. The LAX-specific forecast estimates a maximum of 21°C (about 70°F), with rain probability up to 78% and 4.6–5 mm of precipitation [5]. Prediction markets show pricing bullish for low-70s outcomes; Kalshi shows 70% for 71°F or above, while Polymarket shows 48% for 70–71°F and 37.5% for 68–69°F [6][7]. Robinhood displays contract prices of 78¢ for 69°F, 52¢ for 70°F, and 24¢ for 71°F [8]. Market settlement uses the highest temperature in routine METAR observations at Los Angeles International Airport (LAX/KLAX) [7][8].
Bullish catalysts for higher temperatures include clearing morning cloud, earlier drying, stronger offshore flow, or forecast revisions toward the climatological 73°F average [1][2][3][4][5][6][7][8]. Conversely, bearish catalysts comprise persistent marine clouds, rain/coastal low-level flow, and a delayed or suppressed afternoon warm-up [1][2][3][4][5][6][7][8]. Historical October 31 averages at LAX are materially warmer, approximately 72.8–73.5°F [9]. Despite this, current evidence favors the bearish side relative to climatology, centering the market around roughly 69–71°F [1][2][3][4][5][6][7][8].

Key Dates & Catalysts

  • Strike Date: November 01, 2026
  • Expiration: November 07, 2026
  • Closes: November 01, 2026
Sources (9)
  1. 1Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  2. 2Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  3. 3Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  4. 4Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  5. 5Tomorrow's Weather in Los Angeles International Airport - Hourly Forecast and Conditionsweathercrisp.com
  6. 6Highest temperature in Los Angeles tomorrow? Odds & Predictions 2026kalshi.com
  7. 7Highest temperature in Los Angeles on October 31: 70-71°F 48% - Polymarket Oddspolyinsider.io
  8. 8October 31, 2026: Los Angeles Daily Temperature High October 31 2026 Prediction Marketrobinhood.com
  9. 9October 31 - Los Angeles International Airport - Weather History and Averages - Overcast Dataovercastdata.com

13. Historical Resolutions

Historical Resolutions: 20 markets in this series

Outcomes: 3 resolved YES, 17 resolved NO

Recent resolutions:

  • KXHIGHLAX-26OCT29-T75: NO (Oct 30, 2026)
  • KXHIGHLAX-26OCT29-T68: NO (Oct 30, 2026)
  • KXHIGHLAX-26OCT29-B74.5: NO (Oct 30, 2026)
  • KXHIGHLAX-26OCT29-B72.5: YES (Oct 30, 2026)
  • KXHIGHLAX-26OCT29-B70.5: NO (Oct 30, 2026)