All-time weather records — West Haven, CT

Record high
115.0°F
November 19, 2019
Record low
-8.0°F
January 19, 1948
Wettest day
29.00 in
April 1, 2021

Climate change signal in West Haven

38%

of West Haven's all-time daily heat records were set in the last decade (139 of 366 records since 2015).

9.3%

of all-time daily cold records were set in the last decade (34 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1940s
18
26
1950s
58
106
1960s
35
114
1970s
35
26
2000s
39
51
2010s
87
37
2020s
94
6

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1948, the latest in 2026. Period of observation: 1948-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 69.1°F — Jan 12, 2020 -8.0°F — Jan 19, 1948 2.60 in — Jan 6, 1962
February 68.0°F — Feb 16, 2023 -5.8°F — Feb 14, 2016 2.76 in — Feb 13, 1966
March 77.0°F — Mar 26, 2021 1.0°F — Mar 6, 1948 3.76 in — Mar 21, 1974
April 88.0°F — Apr 14, 2023 11.1°F — Apr 23, 2024 29.00 in — Apr 1, 2021
May 95.0°F — May 31, 2022 30.2°F — May 1, 2008 3.55 in — May 12, 2006
June 98.1°F — Jun 25, 2025 39.9°F — Jun 1, 1967 5.24 in — Jun 19, 1972
July 100.9°F — Jul 22, 2011 50.0°F — Jul 11, 2002 4.59 in — Jul 19, 1971
August 100.0°F — Aug 27, 1948 30.9°F — Aug 7, 2004 4.20 in — Aug 28, 2006
September 95.0°F — Sep 7, 2023 34.0°F — Sep 25, 1963 5.07 in — Sep 12, 1960
October 89.1°F — Oct 2, 2019 21.0°F — Oct 6, 2005 3.85 in — Oct 7, 1972
November 115.0°F — Nov 19, 2019 13.1°F — Nov 23, 2018 4.33 in — Nov 7, 1963
December 64.9°F — Dec 27, 1973 -2.9°F — Dec 27, 1948 2.94 in — Dec 10, 2023

Click a month to see every daily record for that month in West Haven.