Weather on May 21
Vallejo, CA
55 Years of Data
Avg High
77°F
Avg Low
50°F
Warmest
1988
75°F avg
Coldest
2010
53°F avg
About This Date
May 21st in Vallejo, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 50°F — a 27°F daily swing. Over 55 years of records, the warmest May 21st was in 1988 (75°F average), while the coldest was 2010 (53°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 9% of May 21st dates historically, with the wettest May 21st recording 0.94" 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 21st in Vallejo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 52° | 68° | — | — |
| 2024 | 86° | 51° | 69° | — | — |
| 2023 | 77° | 52° | 64° | — | — |
| 2022 | 85° | 52° | 68° | — | — |
| 2021 | 74° | — | — | — | — |
| 2020 | 84° | 52° | 68° | — | — |
| 2019 | 64° | 50° | 57° | 0.25" | — |
| 2018 | 78° | 49° | 63° | — | — |
| 2017 | 95° | 54° | 74° | — | — |
| 2016 | 68° | 49° | 58° | 0.3" | — |
| 2015 | 73° | 52° | 62° | — | — |
| 2014 | 73° | 52° | 62° | — | — |
| 2013 | 75° | 50° | 63° | — | — |
| 2012 | 73° | 48° | 61° | — | — |
| 2011 | 70° | 48° | 59° | — | — |
| 2010coldest | 64° | 42° | 53° | — | — |
| 2009 | 74° | 45° | 59° | — | — |
| 2008 | 77° | 39° | 58° | — | — |
| 2007 | 84° | 45° | 64° | — | — |
| 2006 | 68° | 55° | 62° | 0.91" | — |
| 2005 | 82° | 49° | 65° | — | — |
| 2004 | 70° | 48° | 59° | — | — |
| 2003 | 88° | 52° | 70° | — | — |
| 2002 | 67° | 47° | 57° | 0.94" | — |
| 2001 | 89° | 51° | 70° | — | — |
| 2000 | 96° | 53° | 75° | — | — |
| 1999 | 78° | 46° | 62° | — | — |
| 1998 | 72° | 47° | 59° | — | — |
| 1997 | 86° | 50° | 68° | — | — |
| 1996 | 71° | 52° | 61° | — | — |
| 1995 | 64° | 50° | 57° | — | — |
| 1994 | 75° | 46° | 61° | — | — |
| 1993 | 77° | 51° | 64° | — | — |
| 1992 | 88° | 51° | 69° | — | — |
| 1991 | 85° | 49° | 67° | — | — |
| 1990 | 77° | 49° | 63° | 0.3" | — |
| 1989 | 72° | 47° | 59° | — | — |
| 1988warmest | 95° | 56° | 75° | — | — |
| 1987 | 74° | 52° | 63° | — | — |
| 1986 | 74° | 47° | 60° | — | — |
| 1985 | 90° | 57° | 73° | — | — |
| 1984 | 84° | 44° | 64° | — | — |
| 1983 | 88° | 55° | 71° | — | — |
| 1982 | 80° | 47° | 63° | — | — |
| 1981 | 78° | 49° | 63° | — | — |
| 1980 | 77° | 60° | 69° | — | — |
| 1979 | 69° | 56° | 62° | — | — |
| 1978 | 72° | 52° | 62° | — | — |
| 1977 | 72° | 48° | 60° | — | — |
| 1976 | 80° | 51° | 66° | — | — |
| 1975 | 71° | 50° | 61° | — | — |
| 1974 | 67° | 46° | 56° | — | — |
| 1973 | 70° | 49° | 59° | — | — |
| 1972 | 61° | 55° | 58° | — | — |
| 1971 | 74° | 45° | 59° | — | — |
55 years of data from VALLEJO