Weather on May 18
Vacaville, CA
55 Years of Data
Avg High
81°F
Avg Low
50°F
Warmest
1997
83°F avg
Coldest
1974
48°F avg
About This Date
May 18th in Vacaville, CA typically brings warm spring weather, with average highs around 81°F and lows near 50°F — a 31°F daily swing. Over 55 years of records, the warmest May 18th was in 1997 (83°F average), while the coldest was 1974 (48°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 13% of May 18th dates historically, with the wettest May 18th recording 2.62" 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 May 18th in Vacaville, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 48° | 67° | — | — |
| 2024 | 81° | 56° | 68° | — | — |
| 2023 | 90° | 51° | 70° | — | — |
| 2022 | 101° | 50° | 75° | — | — |
| 2021 | 88° | 46° | 67° | — | — |
| 2020 | 69° | 47° | 58° | — | — |
| 2019 | 58° | 49° | 53° | 2.62" | — |
| 2018 | 84° | 54° | 69° | — | — |
| 2017 | 88° | 49° | 68° | — | — |
| 2016 | 96° | 56° | 76° | — | — |
| 2015 | 73° | 48° | 61° | — | — |
| 2014 | 78° | 54° | 66° | — | — |
| 2013 | 81° | 45° | 63° | — | — |
| 2012 | 85° | 49° | 67° | — | — |
| 2011 | 70° | 50° | 60° | 0.1" | — |
| 2010 | 72° | 51° | 61° | — | — |
| 2009 | 94° | 60° | 77° | — | — |
| 2008 | 100° | 61° | 80° | — | — |
| 2007 | 82° | 49° | 65° | — | — |
| 2006 | 93° | 57° | 75° | — | — |
| 2005 | 69° | 56° | 62° | 1.37" | — |
| 2004 | 76° | 47° | 61° | — | — |
| 2003 | 78° | 52° | 65° | — | — |
| 2002 | 73° | 48° | 61° | — | — |
| 2001 | 96° | 55° | 76° | — | — |
| 2000 | 87° | 51° | 69° | — | — |
| 1999 | 76° | 54° | 65° | — | — |
| 1998 | 75° | 44° | 60° | — | — |
| 1997warmest | 102° | 64° | 83° | — | — |
| 1996 | 67° | 55° | 61° | 0.51" | — |
| 1995 | 84° | 52° | 68° | — | — |
| 1994 | 71° | 43° | 57° | 0.08" | — |
| 1993 | 79° | 51° | 65° | — | — |
| 1992 | 84° | 55° | 70° | — | — |
| 1991 | 61° | 42° | 51° | — | — |
| 1990 | 71° | 45° | 58° | — | — |
| 1989 | 72° | 47° | 59° | — | — |
| 1988 | 84° | 50° | 67° | — | — |
| 1987 | 68° | 50° | 59° | — | — |
| 1986 | 92° | 50° | 71° | — | — |
| 1985 | 78° | 43° | 60° | — | — |
| 1984 | 83° | 48° | 65° | — | — |
| 1983 | 87° | 51° | 69° | — | — |
| 1982 | 79° | 44° | 61° | — | — |
| 1981 | 74° | 51° | 62° | 0.18" | — |
| 1980 | 89° | — | — | — | — |
| 1979 | 96° | 54° | 75° | — | — |
| 1978 | 87° | 48° | 68° | — | — |
| 1977 | 69° | 43° | 56° | 0.38" | — |
| 1976 | 78° | 48° | 63° | — | — |
| 1975 | 91° | 51° | 71° | — | — |
| 1974coldest | 65° | 32° | 48° | — | — |
| 1973 | 97° | 58° | 77° | — | — |
| 1972 | 74° | 46° | 60° | — | — |
| 1971 | 84° | 46° | 65° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS