Highest temperature in NYC on Apr 12, 2026?

Primary long-range climate models project a shift towards ENSO-neutral conditions by spring 2026. A La Niña Advisory is currently active and is expected to continue through the Northern Hemisphere winter of 2025-26, subsequently transitioning to ENSO-neutral conditions during spring 2026 ^[2]. For the April-May-June 2026 season, ENSO-neutral is projected to be the most probable scenario with a 65% likelihood, significantly higher than the 20% for El Niño and 15% for La Niña ^[1]. This forecast indicates that the Oceanic Niño Index (ONI) will likely fall within the -0.5°C to +0.5°C range for the February-April 2026 period ^[1].

ENSO's influence on NYC April temperatures is historically weak. The impact of both El Niño and La Niña on New York City's April temperatures is generally less consistent when compared to winter months ^[3]. Specifically, during El Niño springs, NYC April temperatures have shown only a minor and inconsistent tendency towards being warmer than average ^[3]. Conversely, La Niña springs have not exhibited any clear or consistent signal regarding NYC April temperatures ^[3].

North Atlantic and MDR project above-normal sea surface temperatures. Forecasting for March-April 2026 indicates widespread above-normal Sea Surface Temperatures across the North Atlantic basin. The Main Development Region (MDR), which extends from the coast of Africa westward to the Caribbean Sea in the tropical North Atlantic, is specifically projected to experience positive SST anomalies. These anomalies are likely to range from +0.5°C to +1.5°C above the long-term average ^[1]. Such warmer-than-average waters in the MDR during the pre-season period are often highlighted in seasonal climate updates as a significant factor influencing the potential for robust hurricane activity later in the year ^[3].

U.S. East Coast also expects warmer SSTs, strengthening the Bermuda High. Along the U.S. East Coast, Sea Surface Temperature anomalies for March-April 2026 are also anticipated to be positive, generally falling within the range of +0.3°C to +1.0°C above normal ^[2]. This regional warmth is influenced by the broader North Atlantic SST patterns and contributes to the thermal forcing of the atmosphere. Warmer SSTs in the western North Atlantic and off the U.S. East Coast are known to support the strengthening and expansion of the Bermuda High pressure system ^[4]. A more robust Bermuda High during this period would typically lead to enhanced advection of warm, moist air into the eastern United States, potentially promoting warmer daily temperatures in areas such as New York City ^[1].

A major Sudden Stratospheric Warming event is forecast for February 2026. This event is explicitly predicted to involve a polar vortex split and the influence of a massive atmospheric wave over North America ^[4]. A significant precursor for such stratospheric disturbances, above-normal Siberian snow cover, was observed across Eurasia in October 2025 ^[2]. Historically, this elevated snow extent has been associated with colder winter temperatures in the United States ^[5].

The Stratospheric Polar Vortex is expected to persist into Spring 2026. Despite the predicted Sudden Stratospheric Warming in February, the polar vortex is not anticipated to dissipate entirely. Forecasts indicate its continued relevance in the March 2026 outlook, with a core potentially lingering into Spring 2026 ^[3]. This persistence extends the risk of winter weather into April, suggesting a potential for prolonged cold outbreaks in regions like the Northeast US, possibly affecting temperatures around April 12, 2026 ^[6].

The provided research does not offer specific data to confirm a 65°F trend. The available research does not contain specific data or a statistical analysis to confirm a significant trend in the timing of the first 65°F day of the year in Central Park since 2000. Therefore, a statistically validated trend for this temperature threshold or any potential influence from strong El Niño events cannot be established based solely on the provided information. Although general climate almanacs ^[4] and monthly/annual temperature summaries ^[5], ^[6] from the National Weather Service for Central Park exist, the research did not provide the detailed year-by-year occurrences of the first 65°F day or the necessary statistical analysis.

Broader observations, however, indicate an earlier arrival of spring warmth. Despite the absence of specific data for the 65°F threshold, broader observations from the research suggest a pattern of earlier warm temperatures in Central Park. A notable instance includes Central Park breaking its record for the earliest 80°F day, surpassing the previous record of March 13, 1990

The average temperature this time of year in Central Park is 48 degrees. https://abcnews.link/4yy6RAV" aria-label="Source 1: Central Park has broken the record for earliest 80 degree day. Previously, March 13, 1990 was the earliest recorded day above 80 degrees.</p><p>The average temperature this time of year in Central Park is 48 degrees. https://abcnews.link/4yy6RAV" data-citation-label="Central Park has broken the record for earliest 80 degree day. Previously, March 13, 1990 was the earliest recorded day above 80 degrees.</p><p>The average temperature this time of year in Central Park is 48 degrees. https://abcnews.link/4yy6RAV">[1]. News reports further support this general trend, highlighting early warmth with temperatures reaching 70°F in NYC ^[2] and the wider region experiencing above-normal temperatures ^[3]. Additionally, archived weather articles refer to the occurrence of the year's first high temperatures in the 70s ^[7]. These collective indications point towards an overall tendency for higher spring temperatures to arrive earlier, though a direct statistical connection to the first 65°F day or El Niño events remains unaddressed by this research.

NOAA and ECMWF seasonal forecasts have distinct release timelines. The NOAA Climate Prediction Center (CPC) intends to issue its official Spring 2026 Outlook, which covers April, May, and June, on March 21, 2026 ^[1]. For the ECMWF, the SEAS5 seasonal forecast system's final pre-resolution run for early April 2026 is initialized on April 1, 2026, with its data expected to be available around April 4, 2026 ^[2].

NOAA CPC forecasts show modest historical skill for NYC region. Regarding historical forecast skill for 2m temperature anomalies in the NYC region, the NOAA CPC provides gridded seasonal verifications. For the April-May-June (AMJ) season, the Heidke Skill Score (HSS) for 2m temperature anomalies in the Northeast U.S. region, which encompasses NYC, typically ranges from 0 to 0.15 ^[3]. This range indicates generally positive but modest skill for these forecasts ^[3].

ECMWF SEAS5 demonstrates general positive skill, lacking specific NYC HSS. ECMWF's SEAS5 system also provides seasonal forecasts, generally demonstrating positive skill for 2m temperature across most global regions and various seasons ^[4]. While specific Heidke Skill Scores for the NYC region for the AMJ period are not detailed, verification studies for SEAS5 often highlight positive Anomaly Correlation Coefficient (ACC) values for 2m temperature in the extratropical Northern Hemisphere for relevant seasonal forecast lead times ^[4].