All-time weather records — Pleasant Hill, CA

Record high
109.9°F
July 23, 2006
Record low
24.1°F
December 23, 1998
Wettest day
3.95 in
December 31, 2005

Climate change signal in Pleasant Hill

21.3%

of Pleasant Hill's all-time daily heat records were set in the last decade (78 of 366 records since 2015).

5.7%

of all-time daily cold records were set in the last decade (21 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
99
124
2000s
123
163
2010s
144
79

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 1991, the latest in 2018. Period of observation: 1991-2019.

Records by month

Month Hottest day Coldest day Wettest day
January 75.9°F — Jan 31, 2015 26.1°F — Jan 13, 2007 3.24 in — Jan 4, 2008
February 82.0°F — Feb 18, 2000 30.0°F — Feb 26, 2011 2.19 in — Feb 3, 1998
March 87.1°F — Mar 13, 2009 34.0°F — Mar 5, 2018 1.49 in — Mar 6, 2016
April 96.1°F — Apr 27, 2004 37.9°F — Apr 1, 1999 1.27 in — Apr 7, 2018
May 100.9°F — May 31, 2001 41.0°F — May 13, 1999 1.16 in — May 16, 1996
June 108.0°F — Jun 14, 2000 46.9°F — Jun 19, 2010 1.02 in — Jun 16, 1995
July 109.9°F — Jul 23, 2006 51.1°F — Jul 18, 1999 0.03 in — Jul 22, 2014
August 106.0°F — Aug 25, 2010 51.1°F — Aug 27, 2009 0.40 in — Aug 20, 1997
September 109.9°F — Sep 2, 2017 46.9°F — Sep 24, 2015 0.70 in — Sep 20, 2013
October 99.0°F — Oct 4, 1991 39.9°F — Oct 31, 1991 2.00 in — Oct 13, 2009
November 86.0°F — Nov 3, 2018 30.9°F — Nov 11, 2000 2.48 in — Nov 6, 1994
December 73.9°F — Dec 2, 2011 24.1°F — Dec 23, 1998 3.95 in — Dec 31, 2005

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