All-time weather records — San Jacinto, CA

Record high
116.1°F
September 3, 1982
Record low
18.0°F
December 8, 1978
Wettest day
3.48 in
February 14, 2019

Climate change signal in San Jacinto

15.3%

of San Jacinto's all-time daily heat records were set in the last decade (56 of 366 records since 2015).

1.1%

of all-time daily cold records were set in the last decade (4 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
·
·
1950s
·
·
1970s
10
33
1980s
108
195
1990s
76
79
2000s
74
44
2010s
64
14
2020s
34
1

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 1978, the latest in 2026. Period of observation: 1948-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 91.0°F — Jan 31, 2003 19.9°F — Jan 11, 2007 3.07 in — Jan 16, 1993
February 91.0°F — Feb 14, 2014 24.1°F — Feb 1, 1985 3.48 in — Feb 14, 2019
March 99.0°F — Mar 26, 1988 26.1°F — Mar 14, 1988 2.77 in — Mar 1, 1991
April 102.9°F — Apr 6, 1989 30.0°F — Apr 23, 1991 2.55 in — Apr 5, 2006
May 109.9°F — May 29, 1984 36.0°F — May 10, 1989 2.00 in — May 23, 2008
June 114.1°F — Jun 7, 1985 39.9°F — Jun 28, 2001 0.85 in — Jun 6, 1993
July 115.0°F — Jul 27, 1995 35.1°F — Jul 14, 2001 1.50 in — Jul 24, 2005
August 115.0°F — Aug 25, 1985 44.1°F — Aug 24, 1978 1.49 in — Aug 26, 1982
September 116.1°F — Sep 3, 1982 35.1°F — Sep 19, 1989 1.81 in — Sep 26, 1997
October 109.0°F — Oct 2, 2024 30.9°F — Oct 4, 2003 1.41 in — Oct 21, 2004
November 96.1°F — Nov 3, 2010 25.0°F — Nov 19, 1994 1.90 in — Nov 21, 1996
December 90.0°F — Dec 4, 1979 18.0°F — Dec 8, 1978 2.90 in — Dec 1, 2007

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