All-time weather records — Chelan, WA

Record high
111.0°F
June 30, 2021
Record low
-18.0°F
December 30, 1968
Wettest day
1.88 in
June 21, 1984

Climate change signal in Chelan

30.9%

of Chelan's all-time daily heat records were set in the last decade (113 of 366 records since 2015).

29%

of all-time daily cold records were set in the last decade (106 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 #
1950s
14
9
1960s
48
48
1970s
59
52
1980s
37
117
1990s
36
15
2000s
42
14
2010s
57
43
2020s
73
68

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 1958, the latest in 2026. Period of observation: 1890-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 31, 1989 -14.1°F — Jan 13, 2024 1.40 in — Jan 11, 2000
February 63.0°F — Feb 17, 1977 -0.9°F — Feb 1, 1996 1.07 in — Feb 25, 1981
March 72.0°F — Mar 29, 1994 8.1°F — Mar 4, 2019 1.42 in — Mar 5, 2023
April 88.0°F — Apr 25, 1977 21.0°F — Apr 12, 2021 1.10 in — Apr 15, 1991
May 98.1°F — May 18, 2006 30.0°F — May 2, 2024 1.80 in — May 10, 2005
June 111.0°F — Jun 30, 2021 33.1°F — Jun 24, 1983 1.88 in — Jun 21, 1984
July 109.0°F — Jul 1, 2021 37.0°F — Jul 2, 1983 1.70 in — Jul 21, 2012
August 106.0°F — Aug 4, 2021 42.1°F — Aug 22, 1960 1.49 in — Aug 19, 1975
September 97.0°F — Sep 1, 1974 26.1°F — Sep 29, 1983 1.17 in — Sep 23, 1973
October 88.0°F — Oct 3, 2003 3.0°F — Oct 31, 1984 1.44 in — Oct 31, 2007
November 72.0°F — Nov 1, 1967 -2.9°F — Nov 29, 1985 1.30 in — Nov 11, 1983
December 69.1°F — Dec 2, 2021 -18.0°F — Dec 30, 1968 1.50 in — Dec 31, 1996

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