Weather on October 21
Fairfield, CA
55 Years of Data
Avg High
76°F
Avg Low
50°F
Warmest
2020
73°F avg
Coldest
1979
53°F avg
About This Date
October 21st in Fairfield, CA typically brings pleasant fall weather, with average highs around 76°F and lows near 50°F — a 26°F daily swing. Over 55 years of records, the warmest October 21st was in 2020 (73°F average), while the coldest was 1979 (53°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 9% of October 21st dates historically, with the wettest October 21st recording 1.37" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Fairfield, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 51° | 67° | — | — |
| 2024 | 78° | 51° | 65° | — | — |
| 2023 | 71° | 59° | 65° | — | — |
| 2022 | 83° | 50° | 66° | — | — |
| 2021 | 66° | 56° | 61° | 1.3" | — |
| 2020warmest | 89° | 58° | 73° | — | — |
| 2019 | 88° | 55° | 71° | — | — |
| 2018 | 79° | 47° | 63° | — | — |
| 2017 | 73° | 45° | 59° | — | — |
| 2016 | 80° | 53° | 67° | — | — |
| 2015 | 85° | 54° | 69° | — | — |
| 2014 | 72° | 52° | 62° | — | — |
| 2013 | 79° | 47° | 63° | — | — |
| 2012 | 68° | 49° | 58° | — | — |
| 2011 | 79° | 52° | 65° | — | — |
| 2010 | 74° | 50° | 62° | — | — |
| 2009 | 71° | 50° | 61° | — | — |
| 2008 | 74° | 47° | 60° | — | — |
| 2007 | 69° | 51° | 60° | — | — |
| 2006 | 89° | 48° | 69° | — | — |
| 2005 | 77° | 49° | 63° | — | — |
| 2004 | 62° | 48° | 55° | — | — |
| 2003 | 89° | 54° | 71° | — | — |
| 2002 | 78° | 50° | 64° | — | — |
| 2001 | 67° | 48° | 57° | — | — |
| 2000 | 74° | 56° | 65° | — | — |
| 1999 | 85° | 49° | 67° | — | — |
| 1998 | 86° | 52° | 69° | — | — |
| 1997 | 74° | 47° | 60° | — | — |
| 1996 | 69° | 49° | 59° | — | — |
| 1995 | 80° | 51° | 66° | — | — |
| 1994 | 79° | 47° | 63° | — | — |
| 1993 | 76° | 50° | 63° | — | — |
| 1992 | 75° | 57° | 66° | 0.97" | — |
| 1991 | 83° | 60° | 71° | — | — |
| 1990 | 78° | 48° | 63° | — | — |
| 1989 | 66° | 57° | 62° | — | — |
| 1988 | 80° | 52° | 66° | — | — |
| 1987 | 77° | 51° | 64° | — | — |
| 1986 | 71° | 45° | 58° | — | — |
| 1985 | 67° | 41° | 54° | 1.37" | — |
| 1984 | 72° | 40° | 56° | — | — |
| 1983 | 84° | 48° | 66° | — | — |
| 1982 | 78° | 56° | 67° | — | — |
| 1981 | 85° | 47° | 66° | — | — |
| 1980 | 80° | 41° | 61° | — | — |
| 1979coldest | 64° | 41° | 53° | 0.91" | — |
| 1978 | 71° | 47° | 59° | — | — |
| 1977 | 65° | 49° | 57° | — | — |
| 1976 | 80° | 45° | 62° | — | — |
| 1975 | 82° | 47° | 64° | — | — |
| 1974 | 78° | 44° | 61° | — | — |
| 1973 | 75° | 58° | 66° | 0.2" | — |
| 1972 | 70° | 48° | 59° | — | — |
| 1971 | 72° | 41° | 56° | — | — |
55 years of data from FAIRFIELD