All-time weather records — Knoxville, TN

Record high
105.1°F
July 1, 2012
Record low
-20.0°F
January 21, 1985
Wettest day
6.66 in
September 18, 2012

Climate change signal in Knoxville

32%

of Knoxville's all-time daily heat records were set in the last decade (117 of 366 records since 2015).

10.7%

of all-time daily cold records were set in the last decade (39 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 #
1960s
4
29
1970s
8
55
1980s
62
104
1990s
60
84
2000s
75
39
2010s
115
42
2020s
42
13

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 1967, the latest in 2025. Period of observation: 1966-2025.

Records by month

Month Hottest day Coldest day Wettest day
January 78.1°F — Jan 2, 2022 -20.0°F — Jan 21, 1985 3.05 in — Jan 7, 2009
February 82.0°F — Feb 23, 2018 -11.9°F — Feb 5, 1996 5.87 in — Feb 24, 2019
March 86.0°F — Mar 21, 2012 1.9°F — Mar 15, 1993 3.98 in — Mar 16, 1973
April 90.0°F — Apr 28, 1986 21.0°F — Apr 8, 2007 3.84 in — Apr 28, 2011
May 93.0°F — May 15, 2018 30.0°F — May 11, 2020 4.92 in — May 24, 2000
June 100.9°F — Jun 30, 2012 42.1°F — Jun 1, 1984 3.26 in — Jun 4, 2024
July 105.1°F — Jul 1, 2012 48.0°F — Jul 2, 1988 4.43 in — Jul 23, 2019
August 102.0°F — Aug 17, 2007 48.0°F — Aug 29, 1968 3.10 in — Aug 18, 2021
September 97.0°F — Sep 3, 2011 37.0°F — Sep 23, 1983 6.66 in — Sep 18, 2012
October 95.0°F — Oct 3, 2019 23.0°F — Oct 29, 1976 2.66 in — Oct 8, 2021
November 84.0°F — Nov 1, 2016 15.1°F — Nov 5, 1991 3.32 in — Nov 28, 1973
December 78.1°F — Dec 4, 1982 -5.1°F — Dec 25, 1983 4.66 in — Dec 1, 2016

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