Weather on October 31
Fairfield, CA
55 Years of Data
Avg High
70°F
Avg Low
47°F
Warmest
2015
69°F avg
Coldest
2003
50°F avg
About This Date
October 31st in Fairfield, CA typically brings pleasant fall weather, with average highs around 70°F and lows near 47°F. Over 55 years of records, the warmest October 31st was in 2015 (69°F average), while the coldest was 2003 (50°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 20% of October 31st dates historically, with the wettest October 31st recording 1.27" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for October 31st in Fairfield, CA? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 50° | 64° | — | — |
| 2024 | 67° | 48° | 57° | 0.28" | — |
| 2023 | 75° | 42° | 59° | — | — |
| 2022 | 71° | 47° | 59° | — | — |
| 2021 | 65° | 53° | 59° | — | — |
| 2020 | 81° | 48° | 64° | — | — |
| 2019 | 73° | 40° | 56° | — | — |
| 2018 | 80° | 53° | 67° | — | — |
| 2017 | 69° | 46° | 58° | — | — |
| 2016 | 64° | 49° | 56° | 0.33" | — |
| 2015warmest | 81° | 58° | 69° | — | — |
| 2014 | 66° | 56° | 61° | 0.99" | — |
| 2013 | 72° | 47° | 59° | — | — |
| 2012 | 73° | 50° | 62° | — | — |
| 2011 | 82° | 50° | 66° | — | — |
| 2010 | 59° | 49° | 54° | — | — |
| 2009 | 71° | 47° | 59° | — | — |
| 2008 | 68° | 53° | 61° | 0.41" | — |
| 2007 | 64° | 47° | 55° | — | — |
| 2006 | 69° | 45° | 57° | — | — |
| 2005 | 73° | 47° | 60° | — | — |
| 2004 | 68° | 45° | 56° | — | — |
| 2003coldest | 58° | 43° | 50° | — | — |
| 2002 | 70° | 40° | 55° | — | — |
| 2001 | 69° | 48° | 59° | — | — |
| 2000 | 59° | 43° | 51° | 1.27" | — |
| 1999 | 74° | 47° | 60° | — | — |
| 1998 | 75° | 44° | 60° | — | — |
| 1997 | 74° | 56° | 65° | — | — |
| 1996 | 57° | 46° | 52° | 0.13" | — |
| 1995 | 61° | 54° | 57° | 0.18" | — |
| 1994 | 78° | 47° | 62° | — | — |
| 1993 | 75° | 53° | 64° | — | — |
| 1992 | 68° | 53° | 61° | 0.64" | — |
| 1991 | 67° | 42° | 54° | — | — |
| 1990 | 68° | 54° | 61° | 0.3" | — |
| 1989 | 71° | 41° | 56° | — | — |
| 1988 | 75° | 47° | 61° | — | — |
| 1987 | 72° | 53° | 62° | — | — |
| 1986 | 71° | 56° | 63° | — | — |
| 1985 | 71° | 35° | 53° | — | — |
| 1984 | 67° | 37° | 52° | — | — |
| 1983 | 68° | 58° | 63° | 0.08" | — |
| 1982 | 64° | 45° | 54° | — | — |
| 1981 | 73° | 47° | 60° | — | — |
| 1980 | 71° | 35° | 53° | — | — |
| 1979 | 73° | 42° | 58° | — | — |
| 1978 | 70° | 45° | 57° | — | — |
| 1977 | 69° | 45° | 57° | — | — |
| 1976 | 68° | 41° | 55° | — | — |
| 1975 | 69° | 41° | 55° | — | — |
| 1974 | 60° | 48° | 54° | 0.38" | — |
| 1973 | 77° | 45° | 61° | — | — |
| 1972 | 67° | 38° | 52° | — | — |
| 1971 | 65° | 38° | 51° | — | — |
55 years of data from FAIRFIELD