Weather on December 9
Vacaville, CA
55 Years of Data
Avg High
58°F
Avg Low
39°F
Warmest
2004
59°F avg
Coldest
1972
28°F avg
About This Date
December 9th in Vacaville, CA typically brings cool winter weather, with average highs around 58°F and lows near 39°F. Over 55 years of records, the warmest December 9th was in 2004 (59°F average), while the coldest was 1972 (28°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 25% of December 9th dates historically, with the wettest December 9th recording 4.8" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for December 9th in Vacaville, CA? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 45° | 41° | 43° | — | — |
| 2024 | 67° | 34° | 50° | — | — |
| 2023 | 60° | 31° | 46° | — | — |
| 2022 | 54° | 35° | 44° | — | — |
| 2021 | 61° | 38° | 49° | — | — |
| 2020 | 69° | 34° | 51° | — | — |
| 2019 | 62° | 40° | 51° | — | — |
| 2018 | 52° | 38° | 45° | — | — |
| 2017 | 67° | 30° | 49° | — | — |
| 2016 | 61° | 45° | 53° | 0.41" | — |
| 2015 | 61° | 52° | 56° | — | — |
| 2014 | 60° | 55° | 58° | — | — |
| 2013 | 48° | 23° | 36° | — | — |
| 2012 | 70° | 43° | 56° | — | — |
| 2011 | 62° | 27° | 45° | — | — |
| 2010 | 64° | 52° | 58° | 0.1" | — |
| 2009 | 47° | 28° | 37° | — | — |
| 2008 | 56° | 31° | 43° | — | — |
| 2007 | 61° | 42° | 51° | — | — |
| 2006 | 62° | 51° | 57° | 0.86" | — |
| 2005 | 68° | 42° | 55° | — | — |
| 2004warmest | 66° | 51° | 59° | — | — |
| 2003 | 51° | 39° | 45° | 0.46" | — |
| 2002 | 54° | 41° | 47° | 0.33" | — |
| 2001 | 58° | 44° | 51° | 0.2" | — |
| 2000 | 59° | 43° | 51° | — | — |
| 1999 | 53° | 41° | 47° | 0.41" | — |
| 1998 | 60° | 36° | 48° | — | — |
| 1997 | 58° | 35° | 46° | — | — |
| 1996 | 60° | 51° | 56° | 2.16" | — |
| 1995 | 56° | 45° | 50° | — | — |
| 1994 | 55° | 30° | 43° | — | — |
| 1993 | 58° | 48° | 53° | 0.2" | — |
| 1992 | 56° | 46° | 51° | 4.8" | — |
| 1991 | 63° | 36° | 49° | — | — |
| 1990 | 65° | 34° | 49° | — | — |
| 1989 | 65° | 38° | 51° | — | — |
| 1988 | 67° | 39° | 53° | — | — |
| 1987 | 56° | 45° | 50° | 0.76" | — |
| 1986 | 59° | 32° | 46° | — | — |
| 1985 | 61° | 29° | 45° | — | — |
| 1984 | 59° | 48° | 54° | — | — |
| 1983 | 57° | 45° | 51° | 2.08" | — |
| 1982 | 62° | 31° | 46° | — | — |
| 1981 | 51° | 40° | 45° | 0.43" | — |
| 1980 | 55° | 30° | 43° | — | — |
| 1979 | 68° | 46° | 57° | — | — |
| 1978 | 50° | 28° | 39° | — | — |
| 1977 | 54° | 34° | 44° | — | — |
| 1976 | 62° | 41° | 52° | — | — |
| 1975 | 47° | 36° | 41° | — | — |
| 1974 | 54° | 39° | 46° | — | — |
| 1973 | 51° | 41° | 46° | — | — |
| 1972coldest | 36° | 20° | 28° | — | — |
| 1971 | 45° | 30° | 37° | 0.1" | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS