donsutherland1

The hottest July 4 cases tended to occur during hotter summers, overall. Summer (June 1-August 31) Mean Temperatures for Central Park: 10 Hottest July 4 Cases: 75.3° 10 Coolest July 4 Cases: 73.1° All Other Years: 74.1° Overall, though, the relationship is weak (coefficient of determination: 0.105)

For reference:

In large part because ocean temperatures are still relatively cool at this time of year, New York City saw the lowest temperature 1 day and 2 days after a low of 81F (27.2C) or higher following a shift in the wind off the water. Records go back to 1869.

Yes.

Tomorrow will be unseasonably cool. The mercury could struggle to reach 70° in New York City. It should rise into the lower 70s at Newark. The chilly highs will challenge the record for lowest high temperatures two days after an 80° or above low at Central Park, JFK Airport, and Newark. The existing records are below: Central Park: 71°, July 9, 1883 JFK Airport: 76°, July 23, 2019 Newark: 76°, July 23, 2019 All of those readings followed lows of 80° two days earlier. Central Park has had 72 lows of 80° or above; Newark has had 50; and, JFK Airport has had 16. Temperatures will return mainly to the lower 80s for the remainder of June. Excessive heat does not appear likely to return in the near-term. The ENSO Region 1+2 anomaly was +1.0°C and the Region 3.4 anomaly was 0.2°C for the week centered around June 18. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +0.47°C and the ENSO Region 3.4 anomaly has averaged -0.03°C. Neutral ENSO conditions will likely continue through at least late summer. The SOI was +12.65 yesterday. The preliminary Arctic Oscillation (AO) was +1.073 today. Based on sensitivity analysis applied to the latest guidance, there is an implied 93% probability that New York City will have a warmer than normal June (1991-2020 normal). June will likely finish with a mean temperature near 73.1° (1.1° above normal).

96 and 5 days of 90 or above.

It did not reach 100°. The high was 99°.

I agree. The SSTs are hugely important. % of Lows in the 60s one day after an 80° or above low: July 15 or Before: 20.0% (4 out of 20 days) After July 15: 1.9% (1 out of 52 days) July 20 or Later: 0.0% (0 out of 44 days)

Today is just the 5th day on record that Central Park has seen the temperature fall into the 60s following a day with an 80° or above minimum temperature. There were 72 days with 80° or above lows.

The 3 consecutive 100 degree days in 1948 occurred during August 26-28.

Below is some historic data on the frequency of 90° or above highs and 80° or above lows. The frequency of 90° lows has decreased in parts of the July while increasing during roughly the July 15-25 period. Central Park's dense tree cover has likely contributed to the decreased frequency in parts of July. Central Park has seen 10 days with a decrease, including five days with a greater than 5 percentage point decrease. The nearest station (LaGuardia) has seen an increase on all but 3 days in July. Newark has seen a decrease on only 4 days. Both LaGuardia and Newark saw a decrease of greater than 5 percentage points on one day. JFK is affected by the sea breeze, which adds to the variability. Nevertheless, JFK has seen a greater than 5 percentage point decrease on only one day.

Final Data for the New York City Area’s Most Extreme June Heatwave on Record:

All the sites held onto their 80 or above lows yesterday.

Yesterday's final low temperatures:

Prior to 2025, here are the frequencies of 80 or above lows and 90 or above highs in Central Park during summer.

A selection of records from today:

The New York City area's most severe June heatwave is now concluding. The June 23-25 period saw the highest composite mean high temperature for the New York City area and the highest 3-day composite mean high temperature. No other event comes close. It even beat the synthetic 1- and 3-day periods. The synthetic 1-day mean temperature included all the pre-2025 highest June temperatures on record for a one-day period. The synthetic 3-day mean temperature include all of the pre-2025 3-day periods with the highest June average high temperatures on record. Comparisons:

The 30.3" snowstorm (10 sigma) is a rarer event than the back-to-back 102° days in June (6.7 sigma).

083 SXUS71 KOKX 251708 RERJFK RECORD EVENT REPORT NATIONAL WEATHER SERVICE NEW YORK, NY 107 PM EDT WED JUN 25 2025 ...RECORD DAILY HIGH TEMPERATURE SET AND RECORD MONTHLY HIGH TEMPERATURE TIED AT JOHN F. KENNEDY AIRPORT... THE HIGH TEMPERATURE REACHED 102 DEGREES SO FAR TODAY AT JOHN F. KENNEDY AIRPORT. THIS BREAKS THE OLD DAILY RECORD OF 98 DEGREES, SET IN 1952. THIS ALSO TIES THE MONTHLY RECORD OF 102 SET YESTERDAY, JUNE 24TH 2025, MAKING TODAY TIED FOR THE HOTTEST JUNE DAY ON RECORD AT THIS SITE. THIS PRODUCT WILL BE UPDATED THIS AFTERNOON SHOULD TEMPERATURES CONTINUE TO RISE. RECORDS GO BACK TO THE YEAR 1948 AT THIS CLIMATE STATION. ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI). $$

Tthe two consecutive 102° highs at JFK Airport (June 24-25, 2025) is only the second such streak on record there. The only other streak occurred during July 22-23, 2011.

JFK: 100

New Haven has reached 95°. June 24-25, 2025 is the only case where New Haven has seen 2 consecutive such days. The June monthly record is 96°, which was set June 17, 1957 and tied yesterday.

It will be a close call. Some of the guidance keeps the low at or above 80.

Following yesterday's June monthly record-tying 96F (35.6C) high, New Haven has reached 90F (32.2C) for the 4th consecutive day, breaking the June mark of 3 days from June 20-22, 2012 & June 28-30, 2021. The prior earliest such streak occurred during July 4-7, 2010.

Historical tidbit while temperatures climb. Since 1869, Central Park has had 39 days with low temperatures of 81° or above. All 39 days had highs of 90° or above. The lowest high occurred on July 3, 1876 when the low was 81° and the high was 90°.