All-time weather records — Cornelius, OR

Record high
113.0°F
June 29, 2021
Record low
-29.0°F
February 17, 1955
Wettest day
50.01 in
December 30, 1939

Climate change signal in Cornelius

11.5%

of Cornelius's all-time daily heat records were set in the last decade (42 of 366 records since 2015).

1.4%

of all-time daily cold records were set in the last decade (5 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
13
44
1900s
36
59
1910s
14
27
1920s
13
54
1930s
25
42
1940s
12
21
1950s
25
43
1960s
36
12
1970s
28
23
1980s
31
8
1990s
50
14
2000s
36
11
2010s
24
5
2020s
23
3

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: 1893-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 66.9°F — Jan 19, 2005 -18.0°F — Jan 31, 1950 6.10 in — Jan 12, 1912
February 77.0°F — Feb 27, 1905 -29.0°F — Feb 17, 1955 3.60 in — Feb 12, 2019
March 82.0°F — Mar 26, 1994 12.9°F — Mar 1, 1971 2.30 in — Mar 18, 1938
April 93.0°F — Apr 17, 1897 23.0°F — Apr 13, 1903 2.04 in — Apr 27, 1962
May 100.9°F — May 28, 1983 28.0°F — May 1, 1954 2.05 in — May 31, 1895
June 113.0°F — Jun 29, 2021 32.0°F — Jun 2, 1999 1.80 in — Jun 7, 1985
July 109.0°F — Jul 19, 1956 34.0°F — Jul 2, 1955 1.06 in — Jul 18, 1983
August 108.0°F — Aug 9, 1981 30.9°F — Aug 6, 1996 1.62 in — Aug 24, 1977
September 104.0°F — Sep 3, 1988 27.0°F — Sep 25, 1908 4.23 in — Sep 30, 2013
October 93.0°F — Oct 2, 1988 19.9°F — Oct 30, 2002 2.62 in — Oct 27, 1994
November 90.0°F — Nov 1, 1949 6.1°F — Nov 24, 1985 3.98 in — Nov 14, 1896
December 64.0°F — Dec 5, 1898 -4.0°F — Dec 8, 1972 50.01 in — Dec 30, 1939

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