Weather on March 18
Vallejo, CA
55 Years of Data
Avg High
68°F
Avg Low
43°F
Warmest
2026
67°F avg
Coldest
1973
44°F avg
About This Date
March 18th in Vallejo, CA typically brings mild spring weather, with average highs around 68°F and lows near 43°F — a 25°F daily swing. Over 36 years of records, the warmest March 18th was in 2026 (67°F average), while the coldest was 1973 (44°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 17% of March 18th dates historically, with the wettest March 18th recording 2.01" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for March 18th in Vallejo, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 86° | 48° | 67° | — | — |
| 2025 | 62° | 38° | 50° | — | — |
| 2024 | 74° | 49° | 61° | — | — |
| 2023 | 66° | 45° | 55° | — | — |
| 2022 | 72° | 46° | 59° | — | — |
| 2021 | 56° | 46° | 51° | 0.69" | — |
| 2020 | 58° | 44° | 51° | 0.08" | — |
| 2019 | 74° | 49° | 61° | — | — |
| 2018 | 58° | 38° | 48° | — | — |
| 2017 | 75° | 52° | 63° | — | — |
| 2016 | 75° | 50° | 63° | — | — |
| 2015 | 78° | 49° | 63° | — | — |
| 2014 | 70° | 41° | 55° | — | — |
| 2013 | 65° | 36° | 50° | — | — |
| 2012 | 56° | 40° | 48° | — | — |
| 2011 | 53° | 44° | 49° | 2.01" | — |
| 2010 | 79° | 37° | 58° | — | — |
| 2009 | 71° | 46° | 59° | — | — |
| 2008 | 68° | 37° | 53° | — | — |
| 2007 | 66° | 42° | 54° | — | — |
| 2006 | 63° | 37° | 50° | — | — |
| 2005 | 62° | 51° | 57° | 0.1" | — |
| 2004 | 84° | 43° | 63° | — | — |
| 2003 | 69° | 39° | 54° | — | — |
| 2002 | 64° | 36° | 50° | 0.61" | — |
| 2001 | 75° | 40° | 57° | — | — |
| 2000 | 72° | 40° | 56° | — | — |
| 1999 | 63° | 47° | 55° | — | — |
| 1998 | 76° | 46° | 61° | — | — |
| 1977 | 59° | 36° | 47° | — | — |
| 1976 | 69° | 50° | 60° | 0.25" | — |
| 1975 | 58° | 47° | 52° | — | — |
| 1974 | 71° | 44° | 58° | — | — |
| 1973coldest | 54° | 34° | 44° | — | — |
| 1972 | 70° | 46° | 58° | — | — |
| 1971 | 66° | 48° | 57° | — | — |
36 years of data from MARE ISLAND