All-time weather records — Rock Island, WA

Record high
114.1°F
June 29, 2021
Record low
-20.9°F
December 30, 1968
Wettest day
1.51 in
August 18, 1975

Climate change signal in Rock Island

18%

of Rock Island's all-time daily heat records were set in the last decade (66 of 366 records since 2015).

6.6%

of all-time daily cold records were set in the last decade (24 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
2
1
1960s
70
77
1970s
56
72
1980s
43
92
1990s
67
58
2000s
33
34
2010s
61
15
2020s
34
17

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 1959, the latest in 2025. Period of observation: 1959-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 68.0°F — Jan 24, 2004 -11.9°F — Jan 30, 1996 0.80 in — Jan 6, 2022
February 64.9°F — Feb 21, 1988 -15.0°F — Feb 3, 1996 1.24 in — Feb 26, 2010
March 78.1°F — Mar 28, 1994 4.1°F — Mar 4, 2019 1.35 in — Mar 24, 1991
April 93.0°F — Apr 24, 1977 23.2°F — Apr 15, 2022 1.43 in — Apr 18, 1967
May 102.9°F — May 30, 1986 -0.9°F — May 27, 2011 0.91 in — May 19, 1981
June 114.1°F — Jun 29, 2021 37.9°F — Jun 3, 1976 1.26 in — Jun 9, 1972
July 109.0°F — Jul 28, 2022 43.0°F — Jul 2, 1962 0.75 in — Jul 3, 1965
August 109.0°F — Aug 4, 1961 42.1°F — Aug 23, 1992 1.51 in — Aug 18, 1975
September 100.9°F — Sep 1, 1987 30.9°F — Sep 29, 1985 1.36 in — Sep 22, 1984
October 90.0°F — Oct 6, 2014 15.1°F — Oct 30, 2002 0.90 in — Oct 30, 1997
November 70.0°F — Nov 3, 1975 -5.1°F — Nov 23, 1985 1.32 in — Nov 24, 1965
December 70.0°F — Dec 1, 2021 -20.9°F — Dec 30, 1968 1.12 in — Dec 9, 1987

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