All-time weather records — San Joaquin, CA

Record high
116.1°F
June 30, 1950
Record low
0.0°F
February 18, 2009
Wettest day
2.50 in
June 29, 1982

Climate change signal in San Joaquin

33.1%

of San Joaquin's all-time daily heat records were set in the last decade (121 of 366 records since 2015).

23.5%

of all-time daily cold records were set in the last decade (86 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
24
83
1950s
52
68
1960s
28
42
1970s
15
35
1980s
14
16
1990s
42
17
2000s
35
14
2010s
86
88
2020s
70
3

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 1944, the latest in 2025. Period of observation: 1942-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 86.0°F — Jan 11, 2019 14.0°F — Jan 23, 1962 2.47 in — Jan 1, 2006
February 82.9°F — Feb 28, 2020 0.0°F — Feb 18, 2009 1.57 in — Feb 24, 1969
March 93.9°F — Mar 27, 2015 23.0°F — Mar 17, 2019 1.78 in — Mar 4, 2001
April 102.9°F — Apr 26, 2021 21.0°F — Apr 16, 2015 1.50 in — Apr 15, 2024
May 109.0°F — May 18, 2009 24.1°F — May 6, 2015 1.10 in — May 21, 2006
June 116.1°F — Jun 30, 1950 23.0°F — Jun 4, 2015 2.50 in — Jun 29, 1982
July 116.1°F — Jul 7, 2024 30.9°F — Jul 15, 2015 0.28 in — Jul 30, 1966
August 113.0°F — Aug 7, 2024 41.0°F — Aug 12, 2018 0.29 in — Aug 20, 2023
September 114.1°F — Sep 1, 1955 0.0°F — Sep 26, 2017 1.54 in — Sep 29, 1976
October 107.1°F — Oct 3, 2024 26.1°F — Oct 30, 1971 1.70 in — Oct 29, 1996
November 91.9°F — Nov 2, 1984 0.0°F — Nov 16, 2016 1.25 in — Nov 14, 1953
December 87.1°F — Dec 3, 1995 10.9°F — Dec 22, 1990 1.45 in — Dec 24, 1955

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