All-time weather records — Petaluma, CA

Record high
109.9°F
June 2, 1960
Record low
1.9°F
January 14, 2014
Wettest day
5.17 in
October 24, 2021

Climate change signal in Petaluma

7.1%

of Petaluma's all-time daily heat records were set in the last decade (26 of 366 records since 2015).

0.8%

of all-time daily cold records were set in the last decade (3 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 #
1890s
·
·
1910s
32
141
1920s
57
72
1930s
50
60
1940s
11
11
1950s
27
17
1960s
40
15
1970s
40
10
1980s
37
14
1990s
25
11
2000s
15
6
2010s
17
8
2020s
15
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 1913, the latest in 2026. Period of observation: 1893-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 93.0°F — Jan 1, 1925 1.9°F — Jan 14, 2014 4.06 in — Jan 10, 1979
February 89.1°F — Feb 16, 1913 18.0°F — Feb 7, 1989 3.82 in — Feb 11, 1925
March 93.0°F — Mar 17, 1914 24.1°F — Mar 6, 1918 3.69 in — Mar 9, 1995
April 97.0°F — Apr 29, 1981 24.1°F — Apr 24, 1971 2.55 in — Apr 6, 2018
May 100.9°F — May 12, 1976 27.0°F — May 10, 1985 2.26 in — May 21, 1921
June 109.9°F — Jun 2, 1960 32.0°F — Jun 1, 1930 1.75 in — Jun 2, 1967
July 109.9°F — Jul 14, 1972 35.1°F — Jul 27, 2007 0.91 in — Jul 8, 1974
August 105.1°F — Aug 7, 1921 36.0°F — Aug 21, 1987 1.00 in — Aug 20, 1997
September 109.0°F — Sep 6, 2022 30.9°F — Sep 19, 1929 2.00 in — Sep 13, 1918
October 106.0°F — Oct 2, 1980 25.0°F — Oct 30, 1948 5.17 in — Oct 24, 2021
November 91.0°F — Nov 17, 1932 19.9°F — Nov 14, 1916 3.78 in — Nov 28, 1970
December 81.0°F — Dec 26, 1967 16.0°F — Dec 14, 1932 4.29 in — Dec 27, 2004

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