All-time weather records — Casa Grande, AZ

Record high
122.0°F
July 6, 1905
Record low
-32.1°F
December 28, 1948
Wettest day
4.60 in
March 19, 1983

Climate change signal in Casa Grande

9.6%

of Casa Grande's all-time daily heat records were set in the last decade (35 of 366 records since 2015).

0%

of all-time daily cold records were set in the last decade (0 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
·
·
1900s
107
81
1910s
25
25
1920s
13
36
1930s
48
60
1940s
23
38
1950s
33
29
1960s
6
14
1970s
13
51
1980s
24
23
1990s
11
4
2000s
28
5
2010s
·
·
2020s
35
·

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 1903, the latest in 2026. Period of observation: 1898-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 88.0°F — Jan 30, 1940 17.1°F — Jan 3, 1950 1.75 in — Jan 10, 1905
February 97.0°F — Feb 25, 1986 17.1°F — Feb 20, 1955 1.50 in — Feb 19, 1998
March 104.0°F — Mar 19, 2026 19.0°F — Mar 3, 1985 4.60 in — Mar 19, 1983
April 109.9°F — Apr 27, 1910 28.0°F — Apr 2, 1906 1.25 in — Apr 12, 1912
May 120.0°F — May 30, 1910 36.0°F — May 7, 1975 0.77 in — May 10, 1944
June 118.9°F — Jun 25, 1929 19.9°F — Jun 14, 1993 1.12 in — Jun 22, 1958
July 122.0°F — Jul 6, 1905 52.0°F — Jul 16, 1984 4.50 in — Jul 25, 1936
August 120.0°F — Aug 4, 1907 55.9°F — Aug 23, 1998 3.42 in — Aug 12, 1964
September 116.1°F — Sep 2, 1950 39.9°F — Sep 29, 1982 2.92 in — Sep 18, 1946
October 109.9°F — Oct 1, 2024 25.0°F — Oct 13, 1906 1.84 in — Oct 19, 1972
November 97.0°F — Nov 6, 2020 21.9°F — Nov 24, 1979 2.00 in — Nov 26, 1905
December 91.0°F — Dec 6, 1907 -32.1°F — Dec 28, 1948 1.69 in — Dec 4, 2022

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