All-time weather records — New London, CT

Record high
100.9°F
July 6, 2010
Record low
-75.8°F
February 18, 2022
Wettest day
4.66 in
July 1, 2009

Climate change signal in New London

48.1%

of New London's all-time daily heat records were set in the last decade (176 of 366 records since 2015).

32.5%

of all-time daily cold records were set in the last decade (119 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 #
1990s
·
1
2000s
114
186
2010s
163
118
2020s
89
61

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 2000, the latest in 2026. Period of observation: 1999-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 66.9°F — Jan 15, 2014 -6.9°F — Jan 16, 2009 2.21 in — Jan 5, 2019
February 71.1°F — Feb 16, 2023 -75.8°F — Feb 18, 2022 1.71 in — Feb 13, 2008
March 73.9°F — Mar 18, 2011 4.1°F — Mar 6, 2015 3.42 in — Mar 30, 2010
April 86.0°F — Apr 26, 2009 22.1°F — Apr 2, 2019 3.23 in — Apr 13, 2004
May 93.0°F — May 31, 2022 30.2°F — May 1, 2008 3.26 in — May 12, 2006
June 93.0°F — Jun 25, 2025 39.9°F — Jun 1, 2001 4.53 in — Jun 7, 2013
July 100.9°F — Jul 6, 2010 50.0°F — Jul 11, 2002 4.66 in — Jul 1, 2009
August 100.9°F — Aug 26, 2000 46.0°F — Aug 28, 2025 3.24 in — Aug 28, 2006
September 90.0°F — Sep 4, 2018 36.0°F — Sep 29, 2000 2.75 in — Sep 6, 2008
October 87.1°F — Oct 2, 2019 24.3°F — Oct 19, 2015 4.64 in — Oct 14, 2005
November 79.0°F — Nov 7, 2022 12.2°F — Nov 23, 2018 1.91 in — Nov 22, 2005
December 66.0°F — Dec 1, 2001 6.1°F — Dec 20, 2004 2.97 in — Dec 11, 2024

Click a month to see every daily record for that month in New London.