Weather on March 31
Vacaville, CA
55 Years of Data
Avg High
70°F
Avg Low
45°F
Warmest
2000
70°F avg
Coldest
1974
46°F avg
About This Date
March 31st in Vacaville, CA typically brings pleasant spring weather, with average highs around 70°F and lows near 45°F — a 25°F daily swing. Over 56 years of records, the warmest March 31st was in 2000 (70°F average), while the coldest was 1974 (46°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 23% of March 31st dates historically, with the wettest March 31st recording 6.96" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for March 31st in Vacaville, CA? Great weather for outdoor activities.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 69° | 57° | 63° | 0.18" | — |
| 2025 | 63° | 48° | 55° | 0.08" | — |
| 2024 | 68° | 47° | 57° | 0.13" | — |
| 2023 | 62° | 40° | 51° | — | — |
| 2022 | 73° | 47° | 60° | — | — |
| 2021 | 81° | 51° | 66° | — | — |
| 2020 | 72° | 45° | 58° | — | — |
| 2019 | 77° | 42° | 60° | — | — |
| 2018 | 81° | 47° | 64° | — | — |
| 2017 | 73° | 54° | 63° | — | — |
| 2016 | 76° | 43° | 59° | — | — |
| 2015 | 76° | 46° | 61° | — | — |
| 2014 | 56° | 43° | 49° | — | — |
| 2013 | 69° | 53° | 61° | 0.48" | — |
| 2012 | 58° | 47° | 52° | 0.99" | — |
| 2011 | 81° | 52° | 66° | — | — |
| 2010 | 57° | 42° | 50° | 0.15" | — |
| 2009 | 78° | 44° | 61° | — | — |
| 2008 | 66° | 40° | 53° | — | — |
| 2007 | 81° | 45° | 63° | — | — |
| 2006 | 59° | 45° | 52° | 0.66" | — |
| 2005 | 71° | 41° | 56° | — | — |
| 2004 | 68° | 41° | 55° | — | — |
| 2003 | 79° | 49° | 64° | — | — |
| 2002 | 82° | 42° | 62° | — | — |
| 2001 | 83° | 48° | 65° | — | — |
| 2000warmest | 81° | 59° | 70° | — | — |
| 1999 | 58° | 39° | 48° | 1.22" | — |
| 1998 | 61° | 46° | 53° | 1.09" | — |
| 1997 | 64° | 41° | 53° | — | — |
| 1996 | 74° | 41° | 57° | — | — |
| 1995 | 73° | 42° | 58° | — | — |
| 1994 | 77° | 41° | 59° | — | — |
| 1993 | 68° | 46° | 57° | — | — |
| 1992 | 75° | 46° | 61° | — | — |
| 1991 | 70° | 49° | 59° | — | — |
| 1990 | 68° | 43° | 55° | — | — |
| 1989 | 71° | 54° | 62° | — | — |
| 1988 | 75° | 47° | 61° | — | — |
| 1987 | 78° | 47° | 62° | — | — |
| 1986 | 75° | 49° | 62° | — | — |
| 1985 | 66° | 36° | 51° | — | — |
| 1984 | 60° | 43° | 51° | 0.08" | — |
| 1983 | 67° | 48° | 57° | — | — |
| 1982 | 51° | 42° | 47° | 6.96" | — |
| 1981 | 71° | 39° | 55° | — | — |
| 1980 | 70° | 50° | 60° | — | — |
| 1979 | 70° | 36° | 53° | — | — |
| 1978 | 65° | 55° | 60° | 0.76" | — |
| 1977 | 64° | 34° | 49° | — | — |
| 1976 | 73° | 39° | 56° | — | — |
| 1975 | 69° | 40° | 54° | — | — |
| 1974coldest | 59° | 32° | 46° | — | — |
| 1973 | 63° | 40° | 51° | 0.2" | — |
| 1972 | 71° | 36° | 53° | — | — |
| 1971 | 66° | 35° | 51° | — | — |
56 years of data from VACAVILLE/NUT TREE AP ASOS