All-time weather records — Alameda, CA

Record high
122.0°F
March 7, 2010
Record low
1.2°F
September 23, 2009
Wettest day
5.01 in
December 31, 2022

Climate change signal in Alameda

27.3%

of Alameda's all-time daily heat records were set in the last decade (100 of 366 records since 2015).

5.5%

of all-time daily cold records were set in the last decade (20 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
9
58
1950s
77
162
1960s
42
20
1970s
25
11
1980s
12
2
2000s
60
64
2010s
75
41
2020s
66
8

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

Records by month

Month Hottest day Coldest day Wettest day
January 82.9°F — Jan 18, 2021 25.0°F — Jan 5, 1949 2.56 in — Jan 8, 2018
February 84.0°F — Feb 23, 2021 28.0°F — Feb 1, 1950 2.01 in — Feb 13, 2000
March 122.0°F — Mar 7, 2010 10.9°F — Mar 8, 2004 1.73 in — Mar 8, 1978
April 91.0°F — Apr 20, 2009 35.1°F — Apr 27, 1955 2.14 in — Apr 6, 2018
May 99.0°F — May 15, 2008 39.0°F — May 4, 1950 1.41 in — May 18, 1957
June 107.1°F — Jun 2, 1960 18.1°F — Jun 6, 2010 0.92 in — Jun 2, 1967
July 99.0°F — Jul 10, 1959 48.0°F — Jul 1, 1955 0.78 in — Jul 8, 1974
August 100.9°F — Aug 14, 2020 48.0°F — Aug 22, 1955 0.28 in — Aug 15, 1976
September 104.0°F — Sep 6, 2020 1.2°F — Sep 23, 2009 3.18 in — Sep 18, 1959
October 100.0°F — Oct 6, 2024 36.0°F — Oct 20, 1949 4.53 in — Oct 13, 1962
November 84.9°F — Nov 15, 2008 30.9°F — Nov 30, 2004 2.06 in — Nov 5, 1973
December 79.0°F — Dec 7, 2020 7.0°F — Dec 2, 1984 5.01 in — Dec 31, 2022

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