All-time weather records — Mount Vernon, WA

Record high
98.1°F
August 9, 1960
Record low
-4.0°F
January 26, 1957
Wettest day
3.01 in
November 9, 1990

Climate change signal in Mount Vernon

0%

of Mount Vernon's all-time daily heat records were set in the last decade (0 of 366 records since 2015).

0%

of all-time daily cold records were set in the last decade (0 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
49
56
1960s
83
105
1970s
57
97
1980s
76
67
1990s
73
24
2000s
28
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 1956, the latest in 2005. Period of observation: 1956-2005.

Records by month

Month Hottest day Coldest day Wettest day
January 66.0°F — Jan 21, 1981 -4.0°F — Jan 26, 1957 2.06 in — Jan 23, 1982
February 71.1°F — Feb 27, 1986 7.0°F — Feb 17, 1990 1.62 in — Feb 23, 1986
March 80.1°F — Mar 29, 2004 9.0°F — Mar 3, 1989 1.23 in — Mar 20, 1984
April 80.1°F — Apr 11, 2004 25.0°F — Apr 1, 1975 1.76 in — Apr 13, 2000
May 89.1°F — May 21, 1963 32.0°F — May 6, 1965 1.86 in — May 16, 1988
June 91.9°F — Jun 1, 1970 37.9°F — Jun 2, 1972 2.03 in — Jun 6, 1990
July 93.9°F — Jul 20, 1994 37.9°F — Jul 3, 1962 1.58 in — Jul 16, 1986
August 98.1°F — Aug 9, 1960 36.0°F — Aug 29, 1980 2.76 in — Aug 24, 2004
September 89.1°F — Sep 7, 1981 28.9°F — Sep 30, 2004 2.43 in — Sep 1, 1983
October 82.9°F — Oct 1, 1987 19.0°F — Oct 29, 1991 1.51 in — Oct 20, 2003
November 71.1°F — Nov 1, 1981 7.0°F — Nov 24, 1985 3.01 in — Nov 9, 1990
December 64.9°F — Dec 24, 1963 -0.9°F — Dec 29, 1968 2.05 in — Dec 24, 1967

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