All-time weather records — Portland, OR

Record high
114.1°F
June 28, 2021
Record low
8.1°F
February 3, 1989
Wettest day
6.00 in
January 6, 2004

Climate change signal in Portland

23%

of Portland's all-time daily heat records were set in the last decade (84 of 366 records since 2015).

13.1%

of all-time daily cold records were set in the last decade (48 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 #
1970s
50
100
1980s
75
92
1990s
75
45
2000s
65
49
2010s
55
45
2020s
46
35

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 1973, the latest in 2026. Period of observation: 1973-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.9°F — Jan 18, 2005 12.0°F — Jan 1, 1979 6.00 in — Jan 6, 2004
February 71.1°F — Feb 28, 1988 8.1°F — Feb 3, 1989 2.55 in — Feb 28, 2011
March 82.0°F — Mar 26, 2025 24.1°F — Mar 3, 1989 2.00 in — Mar 12, 2026
April 90.0°F — Apr 19, 2016 30.9°F — Apr 1, 2008 1.33 in — Apr 11, 2022
May 102.9°F — May 28, 1983 36.0°F — May 6, 1978 1.50 in — May 31, 1997
June 114.1°F — Jun 28, 2021 32.0°F — Jun 13, 2003 1.65 in — Jun 20, 1991
July 105.1°F — Jul 28, 2009 45.0°F — Jul 22, 1988 1.27 in — Jul 8, 1974
August 106.0°F — Aug 10, 1981 46.0°F — Aug 18, 1973 1.36 in — Aug 25, 1977
September 102.9°F — Sep 2, 1988 41.0°F — Sep 29, 1982 1.79 in — Sep 27, 2021
October 91.9°F — Oct 1, 1987 30.9°F — Oct 30, 1991 3.20 in — Oct 27, 1994
November 71.1°F — Nov 3, 1975 19.0°F — Nov 24, 2010 3.20 in — Nov 19, 1996
December 71.1°F — Dec 13, 1999 10.0°F — Dec 23, 1983 3.08 in — Dec 3, 2007

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