Weather on December 17
Vacaville, CA
55 Years of Data
Avg High
57°F
Avg Low
37°F
Warmest
1982
55°F avg
Coldest
1985
33°F avg
About This Date
December 17th in Vacaville, CA typically brings cool winter weather, with average highs around 57°F and lows near 37°F. Over 55 years of records, the warmest December 17th was in 1982 (55°F average), while the coldest was 1985 (33°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 36% of December 17th dates historically, with the wettest December 17th recording 3.63" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for December 17th in Vacaville, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 46° | 55° | 0.28" | — |
| 2024 | 60° | 41° | 51° | — | — |
| 2023 | 58° | 37° | 47° | 0.36" | — |
| 2022 | 57° | 28° | 43° | — | — |
| 2021 | 56° | 32° | 44° | — | — |
| 2020 | 60° | 42° | 51° | 0.81" | — |
| 2019 | 54° | 36° | 45° | — | — |
| 2018 | 67° | 41° | 54° | — | — |
| 2017 | 67° | 37° | 52° | — | — |
| 2016 | 54° | 31° | 43° | — | — |
| 2015 | 59° | 33° | 46° | — | — |
| 2014 | 59° | 47° | 53° | 0.46" | — |
| 2013 | 64° | 33° | 49° | — | — |
| 2012 | 61° | 41° | 51° | 0.58" | — |
| 2011 | 55° | 30° | 43° | — | — |
| 2010 | 50° | 42° | 46° | 1.75" | — |
| 2009 | 61° | 40° | 50° | — | — |
| 2008 | 55° | 31° | 43° | — | — |
| 2007 | 52° | 45° | 48° | 0.58" | — |
| 2006 | 51° | 28° | 40° | — | — |
| 2005 | 41° | 38° | 39° | 1.68" | — |
| 2004 | 61° | 33° | 47° | — | — |
| 2003 | 59° | 35° | 47° | — | — |
| 2002 | 56° | 44° | 50° | 0.05" | — |
| 2001 | 50° | 45° | 47° | 0.66" | — |
| 2000 | 63° | 39° | 51° | — | — |
| 1999 | 60° | 34° | 47° | — | — |
| 1998 | 62° | 33° | 48° | — | — |
| 1997 | 48° | 43° | 45° | 0.08" | — |
| 1996 | 67° | 32° | 49° | — | — |
| 1995 | 53° | 36° | 44° | — | — |
| 1994 | 46° | 40° | 43° | 0.03" | — |
| 1993 | 50° | 28° | 39° | — | — |
| 1992 | 52° | 40° | 46° | 0.46" | — |
| 1991 | 51° | 31° | 41° | 0.2" | — |
| 1990 | 58° | 33° | 45° | — | — |
| 1989 | 54° | 33° | 43° | — | — |
| 1988 | 55° | 39° | 47° | — | — |
| 1987 | 60° | 38° | 49° | 0.64" | — |
| 1986 | 60° | 33° | 47° | — | — |
| 1985coldest | 42° | 24° | 33° | — | — |
| 1984 | 48° | 30° | 39° | — | — |
| 1983 | 61° | 50° | 55° | — | — |
| 1982warmest | 62° | 49° | 55° | 0.25" | — |
| 1981 | 51° | 40° | 45° | — | — |
| 1980 | 67° | 34° | 50° | — | — |
| 1979 | 61° | 27° | 44° | — | — |
| 1978 | 50° | 40° | 45° | 1.4" | — |
| 1977 | 57° | 47° | 52° | 3.63" | — |
| 1976 | 64° | 28° | 46° | — | — |
| 1975 | 64° | 28° | 46° | — | — |
| 1974 | 64° | 40° | 52° | — | — |
| 1973 | 62° | 45° | 53° | 0.15" | — |
| 1972 | 46° | 39° | 43° | 2.21" | — |
| 1971 | 54° | 27° | 40° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS