All-time weather records — Fairfield, ID

Record high
100.9°F
July 12, 2002
Record low
-42.0°F
January 19, 1984
Wettest day
2.50 in
December 16, 1994

Climate change signal in Fairfield

12.3%

of Fairfield's all-time daily heat records were set in the last decade (45 of 366 records since 2015).

3.6%

of all-time daily cold records were set in the last decade (13 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 #
1940s
17
12
1950s
35
55
1960s
52
65
1970s
53
47
1980s
66
104
1990s
60
41
2000s
32
23
2010s
27
15
2020s
24
4

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 1948, the latest in 2026. Period of observation: 1948-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 50.0°F — Jan 13, 2026 -42.0°F — Jan 19, 1984 2.07 in — Jan 23, 2006
February 63.0°F — Feb 28, 1992 -38.0°F — Feb 2, 1950 2.20 in — Feb 2, 1952
March 70.0°F — Mar 27, 1986 -24.0°F — Mar 1, 1960 1.62 in — Mar 2, 1991
April 82.9°F — Apr 26, 1987 -2.9°F — Apr 2, 1967 1.22 in — Apr 27, 1956
May 93.9°F — May 28, 2003 15.1°F — May 6, 1968 1.56 in — May 17, 1987
June 99.0°F — Jun 11, 1949 19.0°F — Jun 1, 1966 1.43 in — Jun 6, 1968
July 100.9°F — Jul 12, 2002 26.1°F — Jul 8, 1981 1.64 in — Jul 30, 1985
August 100.0°F — Aug 6, 2024 23.0°F — Aug 26, 1992 1.03 in — Aug 17, 1968
September 96.1°F — Sep 2, 1950 10.9°F — Sep 30, 1985 1.30 in — Sep 9, 1961
October 87.1°F — Oct 1, 1992 -16.1°F — Oct 29, 2019 1.76 in — Oct 4, 2009
November 69.1°F — Nov 1, 1965 -20.9°F — Nov 16, 1955 2.00 in — Nov 28, 1988
December 57.9°F — Dec 2, 2008 -40.0°F — Dec 23, 1983 2.50 in — Dec 16, 1994

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