Weather on May 31
Vacaville, CA
55 Years of Data
Avg High
86°F
Avg Low
54°F
Warmest
2001
85°F avg
Coldest
2011
56°F avg
About This Date
May 31st in Vacaville, CA typically brings warm spring weather, with average highs around 86°F and lows near 54°F — a 32°F daily swing. Over 55 years of records, the warmest May 31st was in 2001 (85°F average), while the coldest was 2011 (56°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 9% of May 31st dates historically, with the wettest May 31st recording 0.56" 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 31st in Vacaville, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 105° | 58° | 81° | — | — |
| 2024 | 97° | 55° | 76° | — | — |
| 2023 | 79° | 52° | 65° | — | — |
| 2022 | 82° | 50° | 66° | — | — |
| 2021 | 104° | 58° | 81° | — | — |
| 2020 | 80° | 56° | 68° | — | — |
| 2019 | 90° | 53° | 71° | — | — |
| 2018 | 73° | 52° | 62° | — | — |
| 2017 | 81° | 58° | 69° | 0.08" | — |
| 2016 | 101° | 59° | 80° | — | — |
| 2015 | 82° | 54° | 68° | — | — |
| 2014 | 84° | 48° | 66° | — | — |
| 2013 | 98° | 53° | 76° | — | — |
| 2012 | 97° | 55° | 76° | — | — |
| 2011coldest | 63° | 50° | 56° | 0.08" | — |
| 2010 | 83° | 59° | 71° | — | — |
| 2009 | 84° | 56° | 70° | — | — |
| 2008 | 76° | 53° | 64° | — | — |
| 2007 | 81° | 52° | 66° | — | — |
| 2006 | 88° | 54° | 71° | — | — |
| 2005 | 90° | 58° | 74° | — | — |
| 2004 | 93° | 54° | 73° | — | — |
| 2003 | 91° | 54° | 72° | — | — |
| 2002 | 92° | 60° | 76° | — | — |
| 2001warmest | 106° | 64° | 85° | — | — |
| 2000 | 86° | 55° | 71° | — | — |
| 1999 | 78° | 52° | 65° | — | — |
| 1998 | 78° | 48° | 63° | — | — |
| 1997 | 93° | 62° | 78° | — | — |
| 1996 | 87° | 49° | 68° | — | — |
| 1995 | 94° | 56° | 75° | — | — |
| 1994 | 87° | 55° | 71° | — | — |
| 1993 | 75° | 58° | 66° | 0.56" | — |
| 1992 | 97° | 58° | 77° | — | — |
| 1991 | 88° | 68° | 78° | — | — |
| 1990 | 69° | 48° | 59° | 0.56" | — |
| 1989 | 90° | 46° | 68° | — | — |
| 1988 | — | 50° | — | — | — |
| 1987 | 80° | 55° | 68° | — | — |
| 1986 | 85° | 55° | 70° | — | — |
| 1985 | 85° | 49° | 67° | 0.05" | — |
| 1984 | 94° | 52° | 73° | — | — |
| 1983 | 79° | 54° | 66° | — | — |
| 1982 | 71° | 53° | 62° | — | — |
| 1981 | 90° | 55° | 72° | — | — |
| 1980 | 72° | 52° | 62° | — | — |
| 1979 | 93° | 52° | 72° | — | — |
| 1978 | 91° | 70° | 80° | — | — |
| 1977 | 93° | 53° | 73° | — | — |
| 1976 | 81° | 54° | 67° | — | — |
| 1975 | 93° | 55° | 74° | — | — |
| 1974 | 86° | 48° | 67° | — | — |
| 1973 | 83° | 55° | 69° | — | — |
| 1972 | 84° | 56° | 70° | — | — |
| 1971 | 71° | 43° | 57° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS