Weather on December 15
Vacaville, CA
55 Years of Data
Avg High
56°F
Avg Low
36°F
Warmest
1981
56°F avg
Coldest
1972
31°F avg
About This Date
December 15th in Vacaville, CA typically brings cool winter weather, with average highs around 56°F and lows near 36°F. Over 55 years of records, the warmest December 15th was in 1981 (56°F average), while the coldest was 1972 (31°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 29% of December 15th dates historically, with the wettest December 15th recording 7.01" 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 December 15th in Vacaville, CA? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 45° | 39° | 42° | — | — |
| 2024 | 51° | 35° | 43° | — | — |
| 2023 | 64° | 33° | 49° | — | — |
| 2022 | 59° | 30° | 45° | — | — |
| 2021 | 52° | 39° | 45° | 0.51" | — |
| 2020 | 55° | 35° | 45° | — | — |
| 2019 | 59° | 36° | 47° | — | — |
| 2018 | 58° | 42° | 50° | — | — |
| 2017 | 62° | 32° | 47° | — | — |
| 2016 | 59° | 50° | 55° | 7.01" | — |
| 2015 | 57° | 41° | 49° | — | — |
| 2014 | 51° | 48° | 50° | 3.25" | — |
| 2013 | 62° | 27° | 45° | — | — |
| 2012 | 44° | 28° | 36° | 0.69" | — |
| 2011 | 54° | 38° | 46° | 0.84" | — |
| 2010 | 56° | 36° | 46° | — | — |
| 2009 | 54° | 47° | 50° | — | — |
| 2008 | 52° | 38° | 45° | 0.46" | — |
| 2007 | 54° | 30° | 42° | — | — |
| 2006 | 58° | 44° | 51° | 0.08" | — |
| 2005 | 56° | 29° | 42° | — | — |
| 2004 | 60° | 37° | 49° | — | — |
| 2003 | 56° | 33° | 44° | — | — |
| 2002 | 55° | 49° | 52° | 2.24" | — |
| 2001 | 56° | 39° | 47° | — | — |
| 2000 | 58° | 42° | 50° | 0.03" | — |
| 1999 | 58° | 30° | 44° | — | — |
| 1998 | 69° | 39° | 54° | — | — |
| 1997 | 54° | 35° | 44° | — | — |
| 1996 | 60° | 37° | 49° | — | — |
| 1995 | 67° | 45° | 56° | 1.7" | — |
| 1994 | 51° | 42° | 47° | 0.86" | — |
| 1993 | 58° | 33° | 45° | — | — |
| 1992 | 57° | 33° | 45° | — | — |
| 1991 | 47° | 35° | 41° | — | — |
| 1990 | 51° | 37° | 44° | 0.53" | — |
| 1989 | 57° | 30° | 44° | — | — |
| 1988 | 60° | 35° | 48° | — | — |
| 1987 | 45° | 34° | 39° | — | — |
| 1986 | 49° | 42° | 45° | — | — |
| 1985 | 49° | 21° | 35° | — | — |
| 1984 | 54° | 35° | 44° | 0.51" | — |
| 1983 | 56° | 52° | 54° | — | — |
| 1982 | 54° | 41° | 47° | 0.13" | — |
| 1981warmest | 61° | 51° | 56° | 0.05" | — |
| 1980 | 61° | 32° | 46° | — | — |
| 1979 | 62° | 29° | 45° | — | — |
| 1978 | 62° | 30° | 46° | — | — |
| 1977 | 61° | 46° | 53° | 4.45" | — |
| 1976 | 62° | 29° | 45° | — | — |
| 1975 | 55° | 26° | 41° | — | — |
| 1974 | 59° | 39° | 49° | — | — |
| 1973 | 49° | 35° | 42° | — | — |
| 1972coldest | 34° | 28° | 31° | — | — |
| 1971 | 49° | 29° | 39° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS