Weather on May 18
Vallejo, CA
55 Years of Data
Avg High
77°F
Avg Low
49°F
Warmest
1997
81°F avg
Coldest
1974
50°F avg
About This Date
May 18th in Vallejo, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 49°F — a 28°F daily swing. Over 55 years of records, the warmest May 18th was in 1997 (81°F average), while the coldest was 1974 (50°F) — a 31°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 0.84" 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 Vallejo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 51° | 64° | — | — |
| 2024 | 69° | 52° | 60° | — | — |
| 2023 | 76° | 52° | 64° | — | — |
| 2022 | 90° | 52° | 71° | — | — |
| 2021 | 77° | 49° | 63° | — | — |
| 2020 | 69° | 52° | 60° | 0.84" | — |
| 2019 | 56° | 46° | 51° | 0.71" | — |
| 2018 | 76° | 52° | 64° | — | — |
| 2017 | 86° | 50° | 68° | — | — |
| 2016 | 93° | 58° | 75° | — | — |
| 2015 | 71° | 50° | 61° | — | — |
| 2014 | 73° | 52° | 62° | — | — |
| 2013 | 78° | 39° | 59° | — | — |
| 2012 | 75° | 41° | 58° | — | — |
| 2011 | 67° | 46° | 56° | 0.1" | — |
| 2010 | 68° | 51° | 60° | — | — |
| 2009 | 70° | 48° | 59° | — | — |
| 2008 | 77° | 48° | 63° | — | — |
| 2007 | 76° | 40° | 58° | — | — |
| 2006 | 74° | 51° | 62° | — | — |
| 2005 | 64° | 56° | 60° | 0.38" | — |
| 2004 | 77° | 50° | 64° | — | — |
| 2003 | 78° | 44° | 61° | — | — |
| 2002 | 67° | 46° | 56° | — | — |
| 2001 | 81° | 46° | 63° | — | — |
| 2000 | 83° | 52° | 67° | — | — |
| 1999 | 70° | 54° | 62° | — | — |
| 1998 | 75° | 45° | 60° | — | — |
| 1997warmest | 100° | 63° | 81° | — | — |
| 1996 | 70° | 55° | 62° | 0.33" | — |
| 1995 | 80° | 46° | 63° | — | — |
| 1994 | 75° | 49° | 62° | — | — |
| 1993 | 83° | 47° | 65° | — | — |
| 1992 | 80° | 54° | 67° | — | — |
| 1991 | 64° | 47° | 55° | — | — |
| 1990 | 69° | 44° | 57° | — | — |
| 1989 | 76° | 47° | 61° | — | — |
| 1988 | 85° | 47° | 66° | — | — |
| 1987 | 74° | 55° | 64° | — | — |
| 1986 | 88° | 51° | 69° | — | — |
| 1985 | 79° | 46° | 62° | — | — |
| 1984 | 85° | 45° | 65° | — | — |
| 1983 | 89° | 52° | 70° | — | — |
| 1982 | 79° | 47° | 63° | — | — |
| 1981 | 70° | 58° | 64° | 0.18" | — |
| 1980 | 89° | 51° | 70° | — | — |
| 1979 | 88° | 55° | 71° | — | — |
| 1978 | 90° | 49° | 69° | — | — |
| 1977 | 67° | 42° | 54° | — | — |
| 1976 | 71° | 47° | 59° | — | — |
| 1975 | 74° | 52° | 63° | — | — |
| 1974coldest | 60° | 40° | 50° | 0.1" | — |
| 1973 | 89° | 52° | 70° | — | — |
| 1972 | 74° | 49° | 61° | — | — |
| 1971 | 76° | 52° | 64° | — | — |
55 years of data from VALLEJO