All-time weather records — Danbury, CT

Record high
122.0°F
October 5, 2000
Record low
-13.9°F
January 7, 2018
Wettest day
9.66 in
September 16, 1999

Climate change signal in Danbury

51.9%

of Danbury's all-time daily heat records were set in the last decade (190 of 366 records since 2015).

30.3%

of all-time daily cold records were set in the last decade (111 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
12
21
2000s
112
181
2010s
119
121
2020s
123
43

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 1998, the latest in 2026. Period of observation: 1998-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 70.0°F — Jan 6, 2007 -13.9°F — Jan 7, 2018 4.05 in — Jan 18, 1999
February 77.0°F — Feb 21, 2018 -12.8°F — Feb 24, 2015 2.76 in — Feb 13, 2008
March 82.0°F — Mar 26, 2021 -7.1°F — Mar 7, 2003 3.44 in — Mar 6, 2011
April 91.9°F — Apr 17, 2002 17.2°F — Apr 6, 2016 3.53 in — Apr 15, 2007
May 93.0°F — May 31, 2022 26.2°F — May 1, 2008 3.95 in — May 19, 1999
June 99.0°F — Jun 24, 2025 35.1°F — Jun 1, 2001 4.60 in — Jun 17, 2001
July 100.0°F — Jul 6, 2010 44.1°F — Jul 3, 2001 3.20 in — Jul 7, 2015
August 100.0°F — Aug 9, 2001 43.0°F — Aug 21, 2000 5.35 in — Aug 28, 2011
September 93.9°F — Sep 8, 2015 28.9°F — Sep 29, 2000 9.66 in — Sep 16, 1999
October 122.0°F — Oct 5, 2000 21.2°F — Oct 19, 2015 5.50 in — Oct 8, 2005
November 80.1°F — Nov 6, 2024 6.3°F — Nov 23, 2018 2.56 in — Nov 8, 2006
December 73.9°F — Dec 7, 1998 -4.0°F — Dec 14, 2005 3.56 in — Dec 18, 2023

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