Weather on March 31
Fairfield, CA
55 Years of Data
Avg High
69°F
Avg Low
45°F
Warmest
2001
70°F avg
Coldest
2010
43°F avg
About This Date
March 31st in Fairfield, CA typically brings mild spring weather, with average highs around 69°F and lows near 45°F. Over 56 years of records, the warmest March 31st was in 2001 (70°F average), while the coldest was 2010 (43°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 30% of March 31st dates historically, with the wettest March 31st recording 4.78" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for March 31st in Fairfield, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 64° | 61° | 62° | — | — |
| 2025 | 63° | 51° | 57° | 0.36" | — |
| 2024 | 68° | 47° | 57° | 0.08" | — |
| 2023 | 61° | 38° | 49° | — | — |
| 2022 | 71° | 44° | 58° | — | — |
| 2021 | 80° | 47° | 63° | — | — |
| 2020 | 70° | 50° | 60° | — | — |
| 2019 | 75° | 46° | 61° | — | — |
| 2018 | 79° | 52° | 65° | — | — |
| 2017 | 73° | 51° | 62° | — | — |
| 2016 | 71° | 47° | 59° | — | — |
| 2015 | 74° | 50° | 62° | — | — |
| 2014 | 63° | 43° | 53° | 1.65" | — |
| 2013 | 68° | 52° | 60° | 0.36" | — |
| 2012 | 58° | 47° | 52° | 1.04" | — |
| 2011 | 84° | 53° | 69° | — | — |
| 2010coldest | 53° | 34° | 43° | 0.33" | — |
| 2009 | 71° | 41° | 56° | — | — |
| 2008 | 62° | 34° | 48° | — | — |
| 2007 | 77° | 43° | 60° | — | — |
| 2006 | 60° | 42° | 51° | 1.65" | — |
| 2005 | 63° | 41° | 52° | 0.2" | — |
| 2004 | 71° | 44° | 58° | — | — |
| 2003 | 80° | 49° | 64° | — | — |
| 2002 | 82° | 46° | 64° | — | — |
| 2001warmest | 85° | 56° | 70° | — | — |
| 2000 | 78° | 44° | 61° | — | — |
| 1999 | 57° | 37° | 47° | 0.28" | — |
| 1998 | 52° | 44° | 48° | 0.94" | — |
| 1997 | 65° | 41° | 53° | — | — |
| 1996 | 69° | 44° | 57° | — | — |
| 1995 | 73° | 45° | 59° | — | — |
| 1994 | 75° | 41° | 58° | — | — |
| 1993 | 61° | 47° | 54° | 0.41" | — |
| 1992 | 76° | 48° | 62° | — | — |
| 1991 | 62° | 48° | 55° | — | — |
| 1990 | 68° | 43° | 55° | — | — |
| 1989 | 68° | 53° | 61° | — | — |
| 1988 | 75° | 57° | 66° | — | — |
| 1987 | 76° | 50° | 63° | — | — |
| 1986 | 71° | 44° | 58° | — | — |
| 1985 | 66° | 36° | 51° | — | — |
| 1984 | 72° | 42° | 57° | 0.05" | — |
| 1983 | 73° | 48° | 61° | 0.03" | — |
| 1982 | 54° | 45° | 49° | 4.78" | — |
| 1981 | 71° | 39° | 55° | — | — |
| 1980 | 72° | 49° | 60° | — | — |
| 1979 | 65° | 39° | 52° | — | — |
| 1978 | 71° | 51° | 61° | 0.43" | — |
| 1977 | 64° | 34° | 49° | — | — |
| 1976 | 77° | 46° | 62° | — | — |
| 1975 | 70° | 40° | 55° | — | — |
| 1974 | 64° | 43° | 53° | 0.08" | — |
| 1973 | 57° | 43° | 50° | 0.41" | — |
| 1972 | 68° | 41° | 55° | — | — |
| 1971 | 70° | 39° | 54° | — | — |
56 years of data from FAIRFIELD