All-time weather records — Signal Mountain, TN

Record high
100.0°F
June 26, 2010
Record low
-6.0°F
December 23, 2022
Wettest day
8.40 in
September 17, 2004

Climate change signal in Signal Mountain

44.5%

of Signal Mountain's all-time daily heat records were set in the last decade (163 of 366 records since 2015).

26.5%

of all-time daily cold records were set in the last decade (97 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
20
107
2000s
110
102
2010s
179
102
2020s
57
55

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 1997, the latest in 2026. Period of observation: 1995-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 71.1°F — Jan 30, 2002 -2.0°F — Jan 7, 2014 3.03 in — Jan 19, 2001
February 75.9°F — Feb 24, 2023 -5.1°F — Feb 4, 1996 3.81 in — Feb 6, 2020
March 82.0°F — Mar 16, 2012 6.1°F — Mar 8, 1996 2.95 in — Mar 6, 1996
April 84.0°F — Apr 4, 1999 26.1°F — Apr 2, 2021 3.97 in — Apr 23, 2018
May 87.1°F — May 27, 2019 37.9°F — May 1, 1996 3.59 in — May 7, 2003
June 100.0°F — Jun 26, 2010 48.0°F — Jun 1, 2021 3.55 in — Jun 4, 2021
July 99.0°F — Jul 1, 2012 57.0°F — Jul 16, 2014 3.88 in — Jul 2, 2003
August 98.1°F — Aug 25, 2007 53.1°F — Aug 13, 2004 3.10 in — Aug 12, 1996
September 93.0°F — Sep 3, 2011 44.1°F — Sep 26, 2000 8.40 in — Sep 17, 2004
October 93.0°F — Oct 3, 2019 28.0°F — Oct 25, 2006 3.73 in — Oct 29, 2020
November 81.0°F — Nov 1, 2016 15.1°F — Nov 13, 2019 4.13 in — Nov 28, 2011
December 73.0°F — Dec 12, 2007 -6.0°F — Dec 23, 2022 2.96 in — Dec 9, 2018

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