All-time weather records — Kennewick, WA

Record high
115.0°F
July 27, 1939
Record low
-29.0°F
December 13, 1919
Wettest day
3.03 in
May 17, 2019

Climate change signal in Kennewick

7.7%

of Kennewick's all-time daily heat records were set in the last decade (28 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
40
31
1900s
34
37
1910s
58
73
1920s
17
70
1930s
43
39
1940s
31
21
1950s
6
35
1960s
22
12
1970s
21
13
1980s
27
19
1990s
18
9
2000s
17
3
2010s
11
4
2020s
21
·

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 1894, the latest in 2026. Period of observation: 1894-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 73.9°F — Jan 10, 1896 -27.0°F — Jan 21, 1930 0.92 in — Jan 2, 2009
February 73.9°F — Feb 21, 1995 -23.1°F — Feb 3, 1950 1.56 in — Feb 3, 1916
March 89.1°F — Mar 27, 1910 8.1°F — Mar 4, 2019 0.90 in — Mar 12, 1923
April 95.0°F — Apr 18, 1910 18.0°F — Apr 1, 1936 1.09 in — Apr 24, 1936
May 104.0°F — May 30, 1983 26.1°F — May 1, 1905 3.03 in — May 17, 2019
June 114.1°F — Jun 30, 2021 35.1°F — Jun 4, 1984 1.42 in — Jun 26, 1942
July 115.0°F — Jul 27, 1939 37.9°F — Jul 2, 1921 0.88 in — Jul 5, 1948
August 115.0°F — Aug 10, 1898 37.0°F — Aug 31, 1924 1.11 in — Aug 30, 1977
September 100.0°F — Sep 1, 1911 21.0°F — Sep 24, 1926 0.91 in — Sep 4, 1911
October 89.1°F — Oct 2, 1943 14.0°F — Oct 30, 1935 1.21 in — Oct 29, 1982
November 79.0°F — Nov 14, 1999 -8.0°F — Nov 23, 1985 2.00 in — Nov 20, 1921
December 72.0°F — Dec 2, 2021 -29.0°F — Dec 13, 1919 1.13 in — Dec 31, 1913

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