All-time weather records — Leavenworth, WA

Record high
109.9°F
July 16, 1941
Record low
-36.0°F
December 30, 1968
Wettest day
3.76 in
January 7, 2009

Climate change signal in Leavenworth

15%

of Leavenworth's all-time daily heat records were set in the last decade (55 of 366 records since 2015).

4.6%

of all-time daily cold records were set in the last decade (17 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 #
1910s
8
22
1920s
31
75
1930s
68
35
1940s
37
28
1950s
16
45
1960s
44
38
1970s
16
39
1980s
27
49
1990s
28
4
2000s
19
13
2010s
46
13
2020s
26
5

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 1915, the latest in 2025. Period of observation: 1914-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.0°F — Jan 30, 1971 -27.0°F — Jan 17, 1930 3.76 in — Jan 7, 2009
February 66.0°F — Feb 10, 2022 -25.1°F — Feb 1, 1950 2.40 in — Feb 3, 1963
March 79.0°F — Mar 28, 1930 -6.0°F — Mar 4, 1955 1.70 in — Mar 5, 1972
April 91.9°F — Apr 28, 1926 19.0°F — Apr 2, 1935 1.60 in — Apr 6, 2023
May 100.9°F — May 30, 1983 24.1°F — May 1, 1982 1.68 in — May 18, 1991
June 109.0°F — Jun 29, 2021 24.1°F — Jun 10, 1929 1.51 in — Jun 21, 1984
July 109.9°F — Jul 16, 1941 34.0°F — Jul 23, 1963 0.73 in — Jul 13, 2009
August 108.0°F — Aug 4, 1961 30.0°F — Aug 29, 1980 1.55 in — Aug 20, 1923
September 104.0°F — Sep 11, 1944 19.0°F — Sep 24, 1926 1.25 in — Sep 23, 1984
October 91.0°F — Oct 2, 2006 10.9°F — Oct 31, 2002 2.05 in — Oct 22, 1982
November 73.9°F — Nov 4, 1937 -9.9°F — Nov 16, 1959 2.93 in — Nov 7, 2006
December 69.1°F — Dec 10, 2025 -36.0°F — Dec 30, 1968 2.74 in — Dec 27, 1937

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