Weather on October 21
Vacaville, CA
55 Years of Data
Avg High
78°F
Avg Low
48°F
Warmest
1991
72°F avg
Coldest
1985
53°F avg
About This Date
October 21st in Vacaville, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 48°F — a 30°F daily swing. Over 55 years of records, the warmest October 21st was in 1991 (72°F average), while the coldest was 1985 (53°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 15% of October 21st dates historically, with the wettest October 21st recording 1.98" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Vacaville, CA? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 47° | 64° | — | — |
| 2024 | 81° | 47° | 64° | — | — |
| 2023 | 78° | 50° | 64° | — | — |
| 2022 | 83° | 49° | 66° | — | — |
| 2021 | 68° | 57° | 63° | 0.05" | — |
| 2020 | 93° | 52° | 72° | — | — |
| 2019 | 88° | 47° | 67° | — | — |
| 2018 | 83° | 43° | 63° | — | — |
| 2017 | 75° | 41° | 58° | — | — |
| 2016 | 83° | 47° | 65° | — | — |
| 2015 | 88° | 54° | 71° | — | — |
| 2014 | 75° | 47° | 61° | — | — |
| 2013 | 82° | 42° | 62° | — | — |
| 2012 | 70° | 47° | 58° | 0.2" | — |
| 2011 | 83° | 48° | 65° | — | — |
| 2010 | 71° | 51° | 61° | — | — |
| 2009 | 75° | 51° | 63° | — | — |
| 2008 | 86° | 49° | 67° | — | — |
| 2007 | 76° | 57° | 66° | — | — |
| 2006 | 85° | 48° | 66° | — | — |
| 2005 | 79° | 47° | 63° | — | — |
| 2004 | 67° | 42° | 54° | — | — |
| 2003 | 91° | 51° | 71° | — | — |
| 2002 | 82° | 47° | 64° | — | — |
| 2001 | 71° | 49° | 60° | — | — |
| 2000 | 73° | 49° | 61° | — | — |
| 1999 | 85° | 48° | 66° | — | — |
| 1998 | 85° | 46° | 65° | — | — |
| 1997 | 81° | 46° | 63° | — | — |
| 1996 | 72° | 47° | 59° | — | — |
| 1995 | 84° | 49° | 66° | — | — |
| 1994 | 79° | 47° | 63° | — | — |
| 1993 | 78° | 54° | 66° | — | — |
| 1992 | 76° | 59° | 67° | 0.69" | — |
| 1991warmest | 90° | 55° | 72° | — | — |
| 1990 | 80° | 46° | 63° | — | — |
| 1989 | 65° | 52° | 58° | 1.52" | — |
| 1988 | 88° | 50° | 69° | — | — |
| 1987 | 78° | 51° | 65° | — | — |
| 1986 | 78° | 45° | 61° | — | — |
| 1985coldest | 63° | 43° | 53° | 1.98" | — |
| 1984 | 67° | 43° | 55° | — | — |
| 1983 | 83° | 47° | 65° | — | — |
| 1982 | 73° | 55° | 64° | 0.08" | — |
| 1981 | 83° | 43° | 63° | — | — |
| 1980 | 79° | 44° | 61° | — | — |
| 1979 | 66° | 41° | 54° | 0.05" | — |
| 1978 | 75° | 45° | 60° | — | — |
| 1977 | 75° | 43° | 59° | — | — |
| 1976 | 82° | 44° | 63° | — | — |
| 1975 | 80° | 49° | 64° | — | — |
| 1974 | 81° | 55° | 68° | — | — |
| 1973 | 73° | 55° | 64° | 0.13" | — |
| 1972 | 69° | 47° | 58° | — | — |
| 1971 | 71° | 40° | 55° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS