Short Answer

Both the model and the market expect the highest temperature in LA on May 1, 2026 to be 70° to 71°, with no compelling evidence of mispricing.

1. Market Behavior & Drivers

The market has traded between 1.0% and 6.0% YES probability, with a current reading of 1.0%. Total volume: 20,515 contracts.
  • Coastal sea breeze and marine layer strongly moderate Los Angeles temperatures.
  • Prediction markets indicate strong sentiment against extreme high temperatures.
  • Long-range forecasts project likely above normal temperatures for the region.
  • Temperatures below 80°F are consistently moderated by coastal influences in late spring.
  • Above normal forecasts make 80-89°F temperatures more plausible for specific days.

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.

Outcome: 68° to 69°

📈 May 01, 2026: 22.0pp spike

Price increased from 8.0% to 30.0%

What happened: No supporting research available for this anomaly.

Outcome: 70° to 71°

📈 April 30, 2026: 12.0pp spike

Price increased from 29.0% to 41.0%

What happened: No supporting research available for this anomaly.

4. Market Data

Contract Snapshot

This market resolves to "Yes" if the highest temperature recorded at Los Angeles Airport, CA, on May 1, 2026, is between 70-71°F, as reported by the National Weather Service's Climatological Report (Daily); otherwise, it resolves to "No." Trading began on April 30, 2026, at 10:00 AM EDT, with the last trading time set for 11:59 PM ET on May 1, 2026, and projected payouts 30 minutes after closing. Traders should rely solely on the linked NWS Climatological Report for resolution, as other weather sources or preliminary NWS data may vary due to potential rounding and conversion nuances.

Market Discussion

The market discussion for LA's highest temperature on May 1, 2026, indicates a close call, with 70-71° currently favored (53%) but 68-69° also having significant support (34%). Traders are weighing conflicting forecasts from NWS (68-69°) and Accuweather (70-71°), noting the sea breeze typically stifles high temperatures. There's a consensus that confident predictions are difficult until later in the morning, with skepticism towards AI predictions over understanding LAX's specific weather patterns.

5. What Is The Primary Factor For LA's May 1, 2026 Temperature?

Primary Temperature FactorStrength and timing of coastal sea breeze and marine layer intrusion [1]
LA Climate InfluenceMediterranean climate moderated by Pacific Ocean proximity [2]
Sea Breeze EffectStrong breeze/persistent marine layer lead to lower max temps; weak/delayed breeze to higher temps [3]
Coastal sea breeze and marine layer strongly influence Los Angeles temperatures. The single most important factor determining the highest temperature in Los Angeles on May 1, 2026, will be the strength and timing of the coastal sea breeze and its associated marine layer intrusion [1]. As a coastal city, Los Angeles experiences a Mediterranean climate significantly moderated by its proximity to the Pacific Ocean, which influences its temperature ranges [2]. This meteorological pattern is a dominant feature of Southern California's climate, particularly during late spring and summer, directly regulating daily maximum temperatures by introducing cooler, moist air from the Pacific Ocean inland [3].
The sea breeze's strength and marine layer's persistence modulate temperatures. The sea breeze, driven by the differential heating between land and sea, brings cooler, moist air from the Pacific Ocean inland, effectively limiting the rise in land temperatures [3]. The intensity and penetration depth of this sea breeze, along with the thickness and persistence of the marine layer (a layer of cool, moist air near the surface, often associated with fog or low clouds), directly influence how much solar radiation reaches the surface and how much warm air from inland areas can push towards the coast [1]. Consequently, a strong, early-arriving sea breeze and a persistent marine layer typically result in lower maximum temperatures, whereas a weak or delayed sea breeze allows for greater solar heating and potentially higher temperatures [3].
Other factors modulate temperatures, but the sea breeze is paramount. While general atmospheric pressure patterns, cloud cover, local topography, and air pollution can modulate diurnal temperature variations [4], the fundamental interaction between the land and the Pacific Ocean via the sea breeze and marine layer remains the primary control on the daily high temperature for coastal Los Angeles [3]. Therefore, forecasting the specific conditions of the sea breeze and marine layer on May 1, 2026, will be essential for predicting the day's highest temperature.
Sources (4)
  1. 1Mean Summer Land Temperatures in the Southern California Coastal Zone: Connections With Ocean Processes - ADSui.adsabs.harvard.edu
  2. 2Climate of Los Angelesen.wikipedia.org
  3. 3The Coastal Sea Breeze in Relation to Diurnal Temperature Changes in the Lower Atmosphere (Southern California)journals.ametsoc.org
  4. 4Diurnal temperature variationen.wikipedia.org

6. What Are the Temperature Predictions for Los Angeles on May 1, 2026?

Probability 100°F+1% [1]
Probability 90°F+4% [1]
Probability 80°F+28% [1]
Prediction markets currently indicate low probabilities for high temperatures. As of current trading odds, the probability of Los Angeles reaching 100°F or more on May 1, 2026, is 1% [1]. The likelihood increases slightly for lower thresholds, with a 4% probability for 90°F or more and a 28% probability for 80°F or more [1]. One market specifically shows a "100% No" prediction for the temperature reaching 100°F or more, aligning with the observed 1% probability [2]. These figures reflect current collective market sentiment based on available information for the specific date.
Long-range climate assessments offer insights that could shift these probabilities. A May to August 2026 Fuels, Fire, and Weather Assessment for Central and Southern California projects temperatures to be "likely above normal" for that period [3]. This regional outlook suggests a general predisposition toward warmer conditions during the broader timeframe, potentially influencing specific daily temperatures. Furthermore, the North America Summer 2026 outlook anticipates a "transition to El Niño" [4]. El Niño-Southern Oscillation (ENSO) conditions are significant drivers of global and regional weather patterns [5]. While precise impact on a single day requires more detailed short-term forecasting, the combined trend of above-normal temperatures and an El Niño transition could collectively shift probabilities toward higher temperatures during this period.
Sources (5)
  1. 1Highest temperature in Los Angeles on May 1? Trading Odds & Predictions (May 1, 2026) | Polymarketpolymarket.com
  2. 2Will the highest temperature in Los Angeles be… 100% No · Polymarketexplorer.struct.to
  3. 3May To August 2026 Fuels, Fire And Weather Assessment For Central And Southern California Report Finds Temperatures Likely Above Normal And Near To Above Normal Precipitationgoldrushcam.com
  4. 4Transition to El Niño, North America Summer 2026 Outlook | OpenSnowopensnow.com
  5. 5Climate Prediction Center: ENSO Diagnostic Discussioncpc.ncep.noaa.gov

7. Why Might Los Angeles' May 2026 Temperature Exceed Forecasts?

Market Consensus BasisLikely based on typical seasonal averages for long lead times [1]
Historical Temperature VariabilityLA experiences significant temperature variability in May, including record highs [2]
Long-Range Forecast ReliabilitySpecific daily forecasts for May 1, 2026, are highly speculative and unreliable [3]
Prediction markets anticipate average temperatures for Los Angeles on May 1, 2026. The current market consensus for the highest temperature in Los Angeles on May 1, 2026, as observed in prediction markets, likely trends towards temperatures near the historical average for that date [1]. This is a common approach for long-range forecasts, which inherently struggle with predicting specific daily weather conditions so far in advance. May 1st in Los Angeles typically presents mild to warm weather, and a consensus generally reflects this climatic norm [1].
A strong counter-argument predicts potentially higher-than-expected temperatures. Despite the market's leaning towards average conditions, a compelling argument suggests the potential for a significantly higher-than-expected temperature on that date. This case is built on two primary factors: historical weather variability and the fundamental unreliability of specific long-range forecasts [3]. While some sources provide future forecast pages for May 1, 2026, any specific temperature predictions for a date nearly two years away are highly speculative [3]. Historical climate data from the National Weather Service reveals that Los Angeles has experienced considerable temperature fluctuations during May, including past record high temperatures that can significantly exceed monthly or daily averages [2]. Therefore, the historical precedent of extreme heat events in Los Angeles during May, coupled with the profound uncertainty of long-term meteorological predictions, presents a compelling argument that the actual highest temperature on May 1, 2026, could deviate substantially, potentially upwards, from what a generalized consensus might anticipate.
Sources (3)
  1. 1Highest temperature in Los Angeles on May 1? Trading Odds & Predictions (May 1, 2026) | Polymarketpolymarket.com
  2. 2National Weather Serviceforecast.weather.gov
  3. 3Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com

8. What Signals Predict Los Angeles Temperature on May 1, 2026?

Polymarket Probability100% "No" for 62-63°F range [1]
Polymarket PredictionsAvailable for various temperature ranges [2]
Long-Range ForecastsAvailable from Weather Underground and Weathertab for May 1, 2026 [3]
Prediction markets strongly indicate specific temperature range unlikely. Informed participants on a prediction market signal a 100% "No" probability that the highest temperature in Los Angeles on May 1, 2026, will be within the 62-63°F range [1]. The platform's event page for "Highest temperature in Los Angeles on May 1, 2026?" additionally presents trading odds and predictions across various potential temperature outcomes, reflecting the collective assessment of market participants [2].
Long-range forecasts exist, but uncertainty remains significant. Beyond prediction markets, institutional and expert sources provide long-range weather forecasts. Services like Weather Underground offer hourly weather forecasts for Los Angeles on May 1, 2026 [3], while Weathertab provides daily forecasts for the entire month of May 2026 for the city [4]. It is crucial to recognize that specific weather predictions made this far in advance are typically subject to considerable uncertainty. Furthermore, historical weather data for Los Angeles on May 1 offers a valuable baseline, detailing the typical temperature ranges experienced on this date in past years [5].
Sources (5)
  1. 1Will the highest temperature in Los Angeles be… 100% No · Polymarketexplorer.struct.to
  2. 2Highest temperature in Los Angeles on May 1? Trading Odds & Predictions (May 1, 2026) | Polymarketpolymarket.com
  3. 3Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  4. 4May 2026 Daily Weather Forecast for Los Angeles, California – Plan Aheadweathertab.com
  5. 5Los Angeles, CA Weather History | Weather Undergroundwu-next-prod.wunderground.com

9. When Will the LA Highest Temperature Market Resolve?

Resolution DateMay 1, 2026 [1]
Primary Price DriverIncreasingly accurate weather forecasts [2]
Secondary Price DriversHistorical weather patterns and related market resolutions [3]
The prediction market concerning the highest temperature in Los Angeles on May 1, 2026, will formally resolve on that specific date. The market's outcome is solely dependent on the actual highest temperature officially recorded in Los Angeles on May 1, 2026 [1]. There are no interim events that will definitively resolve this market; its resolution is exclusively tied to the meteorological conditions and the official peak temperature observed on that particular day [1].
Significant price movements will be driven by evolving weather forecasts. Leading up to the resolution date, market activity will primarily be influenced by the ongoing development and dissemination of weather forecasts. As May 1, 2026, approaches, long-range forecasts from sources like World-Weather.info [4] and Globalmeteo.com [5] will become more detailed. Closer to the resolution date, highly granular hourly forecasts, such as those from Weather Underground for Los Angeles (KLAX) [2], will provide increasingly precise temperature predictions, directly impacting market sentiment and trading activity.
Additional factors like historical data and related market resolutions will inform expectations. Historical weather data for May 1 in Los Angeles, available through Weather Underground [3], will offer crucial context regarding typical temperatures, influencing participant expectations. The resolution of other related prediction markets, such as for April 1, 2026 [6], could also introduce price movements by indicating prevailing weather trends. Daily temperature trends leading up to May, accessible via data calendars like the IEM LAX data for April 2026 [7], could further inform market predictions.
Sources (7)
  1. 1Will the highest temperature in Los Angeles be… 100% No · Polymarketexplorer.struct.to
  2. 2Los Angeles, CA Hourly Weather Forecast | Weather Undergroundwunderground.com
  3. 3Los Angeles, CA Weather History | Weather Undergroundwu-next-prod.wunderground.com
  4. 4Weather in Los Angeles in May 2026 (California) - Detailed Weather Forecast for a Monthworld-weather.info
  5. 5Los Angeles, CA 1 May Weather. Forecast for Los Angeles, CA - United States, Californiaglobalmeteo.com
  6. 6Highest temperature in Los Angeles on April 1? Trading Odds & Predictions (Apr. 1, 2026) | Polymarketpolymarket.com
  7. 7IEM:: LAX Data Calendar for Apr 2026mesonet.agron.iastate.edu

11. Historical Resolutions

Historical Resolutions: 20 markets in this series

Outcomes: 3 resolved YES, 17 resolved NO

Recent resolutions:

  • KXHIGHLAX-26APR30-T73: NO (May 01, 2026)
  • KXHIGHLAX-26APR30-T66: NO (May 01, 2026)
  • KXHIGHLAX-26APR30-B72.5: NO (May 01, 2026)
  • KXHIGHLAX-26APR30-B70.5: YES (May 01, 2026)
  • KXHIGHLAX-26APR30-B68.5: NO (May 01, 2026)