Weather on March 21
Fairfield, CA
55 Years of Data
Avg High
67°F
Avg Low
45°F
Warmest
2026
71°F avg
Coldest
2011
46°F avg
About This Date
March 21st in Fairfield, CA typically brings mild spring weather, with average highs around 67°F and lows near 45°F. Over 56 years of records, the warmest March 21st was in 2026 (71°F average), while the coldest was 2011 (46°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 23% of March 21st dates historically, with the wettest March 21st recording 4.06" of rain. The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Fairfield, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 85° | 58° | 71° | — | — |
| 2025 | 66° | 46° | 56° | — | — |
| 2024 | 70° | 46° | 58° | — | — |
| 2023 | 52° | 44° | 48° | 1.93" | — |
| 2022 | 81° | 46° | 63° | — | — |
| 2021 | 69° | 44° | 57° | — | — |
| 2020 | 66° | 42° | 54° | — | — |
| 2019 | 65° | 42° | 53° | — | — |
| 2018 | 65° | 51° | 58° | 1.98" | — |
| 2017 | 66° | 55° | 61° | 4.06" | — |
| 2016 | 64° | 49° | 56° | 0.3" | — |
| 2015 | 74° | 49° | 61° | — | — |
| 2014 | 72° | 44° | 58° | — | — |
| 2013 | 60° | 48° | 54° | 0.08" | — |
| 2012 | 71° | 46° | 59° | — | — |
| 2011coldest | 54° | 38° | 46° | — | — |
| 2010 | 69° | 43° | 56° | — | — |
| 2009 | 58° | 40° | 49° | — | — |
| 2008 | 65° | 42° | 53° | — | — |
| 2007 | 66° | 45° | 55° | — | — |
| 2006 | 58° | 41° | 49° | 1.07" | — |
| 2005 | 64° | 47° | 55° | 1.19" | — |
| 2004 | 79° | 50° | 64° | — | — |
| 2003 | 73° | 44° | 59° | — | — |
| 2002 | 73° | 45° | 59° | — | — |
| 2001 | 82° | 53° | 68° | — | — |
| 2000 | 67° | 50° | 58° | — | — |
| 1999 | 61° | 46° | 53° | 0.05" | — |
| 1998 | 67° | 52° | 59° | — | — |
| 1997 | 78° | 56° | 67° | — | — |
| 1996 | 77° | 48° | 63° | — | — |
| 1995 | 55° | 41° | 48° | 2.79" | — |
| 1994 | 64° | 41° | 53° | — | — |
| 1993 | 74° | 48° | 61° | — | — |
| 1992 | 67° | 47° | 57° | — | — |
| 1991 | 57° | 42° | 50° | 0.03" | — |
| 1990 | 78° | 50° | 64° | — | — |
| 1989 | 72° | 50° | 61° | — | — |
| 1988 | 76° | 50° | 63° | — | — |
| 1987 | 58° | 36° | 47° | — | — |
| 1986 | 73° | 40° | 56° | — | — |
| 1985 | 69° | 34° | 51° | — | — |
| 1984 | 80° | 41° | 61° | — | — |
| 1983 | 56° | 44° | 50° | 1.22" | — |
| 1982 | 64° | 35° | 50° | — | — |
| 1981 | 56° | 44° | 50° | 1.65" | — |
| 1980 | 67° | 42° | 54° | — | — |
| 1979 | 65° | 45° | 55° | — | — |
| 1978 | 71° | 57° | 64° | — | — |
| 1977 | 70° | 42° | 56° | — | — |
| 1976 | 70° | 39° | 54° | — | — |
| 1975 | 59° | 41° | 50° | — | — |
| 1974 | 65° | 47° | 56° | — | — |
| 1973 | 55° | 42° | 49° | 0.46" | — |
| 1972 | 67° | 42° | 54° | — | — |
| 1971 | 69° | 44° | 57° | — | — |
56 years of data from FAIRFIELD