Weather on March 31
Vallejo, CA
55 Years of Data
Avg High
68°F
Avg Low
44°F
Warmest
2000
70°F avg
Coldest
1999
44°F avg
About This Date
March 31st in Vallejo, CA typically brings mild spring weather, with average highs around 68°F and lows near 44°F. Over 36 years of records, the warmest March 31st was in 2000 (70°F average), while the coldest was 1999 (44°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 33% of March 31st dates historically, with the wettest March 31st recording 1.85" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for March 31st in Vallejo, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 65° | 56° | 60° | 0.15" | — |
| 2025 | 61° | 50° | 55° | 0.38" | — |
| 2024 | 67° | 47° | 57° | — | — |
| 2023 | 61° | 41° | 51° | 0.05" | — |
| 2022 | 70° | 45° | 57° | — | — |
| 2021 | 80° | 51° | 66° | — | — |
| 2020 | 69° | 49° | 59° | — | — |
| 2019 | 77° | 47° | 62° | — | — |
| 2018 | 79° | 52° | 65° | — | — |
| 2017 | 76° | 50° | 63° | — | — |
| 2016 | 73° | 48° | 61° | — | — |
| 2015 | 74° | 49° | 61° | — | — |
| 2014 | 55° | 40° | 47° | 0.97" | — |
| 2013 | 65° | 53° | 59° | 0.48" | — |
| 2012 | 59° | 47° | 53° | 1.85" | — |
| 2011 | 79° | 47° | 63° | — | — |
| 2010 | 56° | 38° | 47° | 0.58" | — |
| 2009 | 73° | 35° | 54° | — | — |
| 2008 | 63° | 28° | 45° | — | — |
| 2007 | 71° | 36° | 53° | — | — |
| 2006 | 59° | 40° | 49° | 0.46" | — |
| 2005 | 70° | 36° | 53° | — | — |
| 2004 | 68° | 42° | 55° | — | — |
| 2003 | 81° | 51° | 66° | — | — |
| 2002 | 74° | 48° | 61° | — | — |
| 2001 | 77° | 42° | 60° | — | — |
| 2000warmest | 85° | 55° | 70° | — | — |
| 1999coldest | 55° | 34° | 44° | — | — |
| 1998 | 53° | 47° | 50° | 0.99" | — |
| 1977 | 61° | 37° | 49° | — | — |
| 1976 | 76° | 46° | 61° | 0.03" | — |
| 1975 | 72° | 38° | 55° | — | — |
| 1974 | 59° | 42° | 51° | 0.03" | — |
| 1973 | 56° | 46° | 51° | 0.33" | — |
| 1972 | 73° | 43° | 58° | — | — |
| 1971 | 66° | 42° | 54° | — | — |
36 years of data from MARE ISLAND