All-time weather records — Tucson, AZ

Record high
117.0°F
June 26, 1990
Record low
16.0°F
January 4, 1949
Wettest day
3.93 in
July 29, 1958

Climate change signal in Tucson

40.2%

of Tucson's all-time daily heat records were set in the last decade (147 of 366 records since 2015).

1.9%

of all-time daily cold records were set in the last decade (7 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
8
42
1950s
27
81
1960s
8
82
1970s
4
68
1980s
57
38
1990s
47
29
2000s
46
11
2010s
60
10
2020s
109
5

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: 1946-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 87.1°F — Jan 10, 1953 16.0°F — Jan 4, 1949 1.39 in — Jan 30, 2015
February 91.9°F — Feb 14, 1957 18.0°F — Feb 3, 2011 1.26 in — Feb 7, 1966
March 102.0°F — Mar 21, 2026 19.9°F — Mar 4, 1965 1.19 in — Mar 9, 1952
April 104.0°F — Apr 20, 1989 32.0°F — Apr 5, 2023 1.17 in — Apr 1, 1999
May 109.0°F — May 22, 2005 37.9°F — May 5, 1950 1.10 in — May 11, 2019
June 117.0°F — Jun 26, 1990 46.9°F — Jun 2, 1955 1.27 in — Jun 24, 1954
July 114.1°F — Jul 4, 1989 59.0°F — Jul 2, 1992 3.93 in — Jul 29, 1958
August 111.9°F — Aug 1, 1993 61.0°F — Aug 29, 1956 2.48 in — Aug 22, 1961
September 111.0°F — Sep 10, 2023 44.1°F — Sep 30, 1965 2.85 in — Sep 10, 1964
October 106.0°F — Oct 4, 2024 26.1°F — Oct 30, 1971 2.96 in — Oct 1, 1983
November 93.9°F — Nov 5, 2020 23.0°F — Nov 30, 2010 1.57 in — Nov 14, 1968
December 84.9°F — Dec 1, 2021 16.0°F — Dec 24, 1974 2.10 in — Dec 5, 1994

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