All-time weather records — Vallejo, CA

Record high
113.0°F
September 1, 2017
Record low
-27.0°F
January 15, 2002
Wettest day
3.00 in
December 30, 2022

Climate change signal in Vallejo

73.5%

of Vallejo's all-time daily heat records were set in the last decade (269 of 366 records since 2015).

24%

of all-time daily cold records were set in the last decade (88 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
28
94
2000s
69
184
2010s
130
37
2020s
139
51

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 80.1°F — Jan 18, 2021 -27.0°F — Jan 15, 2002 2.10 in — Jan 24, 2000
February 82.0°F — Feb 15, 2016 -2.0°F — Feb 18, 1999 2.61 in — Feb 3, 1998
March 90.0°F — Mar 16, 2004 25.0°F — Mar 25, 1999 1.90 in — Mar 4, 2005
April 93.0°F — Apr 30, 2015 32.0°F — Apr 9, 1999 1.76 in — Apr 6, 2018
May 102.9°F — May 26, 2020 37.9°F — May 10, 2003 1.37 in — May 8, 2005
June 109.9°F — Jun 14, 2000 44.1°F — Jun 10, 1999 0.25 in — Jun 8, 2000
July 107.1°F — Jul 2, 2024 0.0°F — Jul 24, 2015 0.01 in — Jul 10, 2015
August 109.0°F — Aug 14, 2020 46.9°F — Aug 6, 2002 0.04 in — Aug 30, 2000
September 113.0°F — Sep 1, 2017 44.1°F — Sep 19, 2004 0.40 in — Sep 25, 2001
October 105.1°F — Oct 1, 2024 35.1°F — Oct 23, 2022 2.20 in — Oct 24, 2021
November 84.0°F — Nov 1, 2018 30.0°F — Nov 24, 2003 1.92 in — Nov 12, 2001
December 77.0°F — Dec 19, 1999 23.0°F — Dec 21, 1998 3.00 in — Dec 30, 2022

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