Weather on March 18
Vacaville, CA
55 Years of Data
Avg High
69°F
Avg Low
44°F
Warmest
2026
69°F avg
Coldest
2018
45°F avg
About This Date
March 18th in Vacaville, CA typically brings mild spring weather, with average highs around 69°F and lows near 44°F — a 25°F daily swing. Over 56 years of records, the warmest March 18th was in 2026 (69°F average), while the coldest was 2018 (45°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 21% of March 18th dates historically, with the wettest March 18th recording 2.64" of rain. The last decade has been 3.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.4°F cooler on this date compared to 20-30 years ago.
Planning for March 18th in Vacaville, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 88° | 51° | 69° | — | — |
| 2025 | 62° | 35° | 49° | — | — |
| 2024 | 76° | 42° | 59° | — | — |
| 2023 | 63° | 42° | 52° | — | — |
| 2022 | 75° | 41° | 58° | — | — |
| 2021 | 55° | 49° | 52° | 0.61" | — |
| 2020 | 55° | 44° | 50° | — | — |
| 2019 | 77° | 40° | 58° | — | — |
| 2018coldest | 58° | 33° | 45° | — | — |
| 2017 | 70° | 52° | 61° | — | — |
| 2016 | 75° | 45° | 60° | — | — |
| 2015 | 80° | 45° | 62° | — | — |
| 2014 | 73° | 45° | 59° | — | — |
| 2013 | 69° | 40° | 54° | — | — |
| 2012 | 57° | 41° | 49° | — | — |
| 2011 | 53° | 41° | 47° | 2.64" | — |
| 2010 | 79° | 46° | 62° | — | — |
| 2009 | 77° | 47° | 62° | — | — |
| 2008 | 75° | 45° | 60° | — | — |
| 2007 | 79° | 48° | 63° | — | — |
| 2006 | 63° | 37° | 50° | — | — |
| 2005 | 59° | 48° | 54° | 0.3" | — |
| 2004 | 83° | 47° | 65° | — | — |
| 2003 | 70° | 47° | 58° | — | — |
| 2002 | 63° | 37° | 50° | — | — |
| 2001 | 78° | 45° | 61° | — | — |
| 2000 | 76° | 46° | 61° | — | — |
| 1999 | 61° | 47° | 54° | — | — |
| 1998 | 77° | 47° | 62° | — | — |
| 1997 | 74° | 44° | 59° | — | — |
| 1996 | 81° | 53° | 67° | — | — |
| 1995 | 67° | 49° | 58° | 0.15" | — |
| 1994 | 67° | 45° | 56° | — | — |
| 1993 | 71° | 47° | 59° | — | — |
| 1992 | 67° | 43° | 55° | — | — |
| 1991 | 55° | 45° | 50° | 0.03" | — |
| 1990 | 74° | 45° | 59° | — | — |
| 1989 | 58° | 37° | 47° | 0.66" | — |
| 1988 | 75° | 41° | 58° | — | — |
| 1987 | 64° | 47° | 55° | — | — |
| 1986 | 64° | 51° | 58° | — | — |
| 1985 | 65° | 42° | 53° | 0.25" | — |
| 1984 | 70° | 38° | 54° | — | — |
| 1983 | 57° | 44° | 51° | 0.3" | — |
| 1982 | 64° | 34° | 49° | 1.6" | — |
| 1981 | 61° | 42° | 51° | 1.07" | — |
| 1980 | 64° | 37° | 51° | 0.03" | — |
| 1979 | 61° | 45° | 53° | — | — |
| 1978 | 73° | 49° | 61° | — | — |
| 1977 | 68° | 34° | 51° | — | — |
| 1976 | 69° | 48° | 59° | 0.13" | — |
| 1975 | 65° | 47° | 56° | — | — |
| 1974 | 74° | 36° | 55° | — | — |
| 1973 | 63° | 31° | 47° | — | — |
| 1972 | 77° | 44° | 61° | — | — |
| 1971 | 69° | 46° | 58° | — | — |
56 years of data from VACAVILLE/NUT TREE AP ASOS