All-time weather records — Walla Walla, WA

Record high
116.1°F
June 29, 2021
Record low
-24.0°F
December 30, 1968
Wettest day
3.64 in
July 23, 1992

Climate change signal in Walla Walla

14.8%

of Walla Walla's all-time daily heat records were set in the last decade (54 of 366 records since 2015).

9.3%

of all-time daily cold records were set in the last decade (34 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
5
11
1950s
45
92
1960s
48
64
1970s
59
55
1980s
60
41
1990s
43
27
2000s
36
34
2010s
37
18
2020s
33
24

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 1949, the latest in 2026. Period of observation: 1949-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 70.0°F — Jan 20, 1968 -18.0°F — Jan 27, 1957 1.31 in — Jan 1, 1994
February 75.0°F — Feb 20, 1995 -16.1°F — Feb 1, 1950 1.61 in — Feb 23, 2002
March 79.0°F — Mar 25, 2025 3.9°F — Mar 1, 1993 1.36 in — Mar 4, 1983
April 96.1°F — Apr 24, 1977 19.9°F — Apr 19, 1966 1.62 in — Apr 27, 1990
May 100.0°F — May 28, 1983 26.1°F — May 1, 1954 1.70 in — May 26, 1971
June 116.1°F — Jun 29, 2021 36.0°F — Jun 1, 1966 1.50 in — Jun 7, 1950
July 114.1°F — Jul 10, 1975 39.9°F — Jul 7, 1971 3.64 in — Jul 23, 1992
August 114.1°F — Aug 4, 1961 42.1°F — Aug 24, 1992 2.29 in — Aug 22, 1992
September 104.0°F — Sep 2, 1950 32.0°F — Sep 17, 1965 1.69 in — Sep 8, 2003
October 89.1°F — Oct 3, 1958 15.1°F — Oct 31, 2002 1.56 in — Oct 31, 1994
November 81.0°F — Nov 12, 1999 -11.0°F — Nov 23, 1985 1.50 in — Nov 4, 1994
December 71.1°F — Dec 10, 2014 -24.0°F — Dec 30, 1968 1.39 in — Dec 5, 1971

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