Weather on October 31
Vacaville, CA
55 Years of Data
Avg High
72°F
Avg Low
45°F
Warmest
1997
71°F avg
Coldest
2003
48°F avg
About This Date
October 31st in Vacaville, CA typically brings pleasant fall weather, with average highs around 72°F and lows near 45°F — a 27°F daily swing. Over 55 years of records, the warmest October 31st was in 1997 (71°F average), while the coldest was 2003 (48°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 18% of October 31st dates historically, with the wettest October 31st recording 1.14" 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 October 31st in Vacaville, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 46° | 63° | — | — |
| 2024 | 67° | 44° | 55° | 0.13" | — |
| 2023 | 75° | 35° | 55° | — | — |
| 2022 | 71° | 46° | 59° | — | — |
| 2021 | 67° | 51° | 59° | — | — |
| 2020 | 82° | 42° | 62° | — | — |
| 2019 | 74° | 33° | 53° | — | — |
| 2018 | 82° | 46° | 64° | — | — |
| 2017 | 74° | 41° | 57° | — | — |
| 2016 | 66° | 46° | 56° | 0.89" | — |
| 2015 | 88° | 48° | 68° | — | — |
| 2014 | 63° | 55° | 59° | 1.14" | — |
| 2013 | 73° | 38° | 55° | — | — |
| 2012 | 64° | 56° | 60° | 0.43" | — |
| 2011 | 82° | 46° | 64° | — | — |
| 2010 | 71° | 49° | 60° | — | — |
| 2009 | 75° | 49° | 62° | — | — |
| 2008 | 70° | 59° | 64° | 0.66" | — |
| 2007 | 70° | 46° | 58° | — | — |
| 2006 | 65° | 37° | 51° | — | — |
| 2005 | 76° | 41° | 58° | — | — |
| 2004 | 69° | 47° | 58° | — | — |
| 2003coldest | 58° | 38° | 48° | — | — |
| 2002 | 72° | 34° | 53° | — | — |
| 2001 | 69° | 48° | 59° | — | — |
| 2000 | 70° | 40° | 55° | — | — |
| 1999 | 81° | 44° | 62° | — | — |
| 1998 | 73° | 42° | 58° | 0.05" | — |
| 1997warmest | 86° | 55° | 71° | — | — |
| 1996 | 63° | 46° | 54° | 0.13" | — |
| 1995 | 65° | 49° | 57° | — | — |
| 1994 | 78° | 47° | 62° | — | — |
| 1993 | 77° | 50° | 64° | — | — |
| 1992 | 68° | 51° | 60° | — | — |
| 1991 | 68° | 41° | 55° | — | — |
| 1990 | 68° | 55° | 62° | 0.18" | — |
| 1989 | 70° | 35° | 52° | — | — |
| 1988 | 74° | 48° | 61° | — | — |
| 1987 | 72° | 49° | 60° | — | — |
| 1986 | 75° | 51° | 63° | — | — |
| 1985 | 75° | 40° | 57° | — | — |
| 1984 | 70° | 40° | 55° | — | — |
| 1983 | 71° | 57° | 64° | 0.08" | — |
| 1982 | 70° | 44° | 57° | — | — |
| 1981 | 71° | 44° | 58° | — | — |
| 1980 | 78° | 39° | 59° | — | — |
| 1979 | 70° | 42° | 56° | — | — |
| 1978 | 68° | 37° | 53° | — | — |
| 1977 | 69° | 41° | 55° | — | — |
| 1976 | 76° | 39° | 57° | — | — |
| 1975 | 72° | 50° | 61° | — | — |
| 1974 | 57° | 48° | 53° | 0.53" | — |
| 1973 | 80° | 43° | 61° | — | — |
| 1972 | 68° | 36° | 52° | — | — |
| 1971 | 62° | 41° | 52° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS