Weather on December 20
Vacaville, CA
55 Years of Data
About This Date
December 20th in Vacaville, CA typically brings cool winter weather, with average highs around 54°F and lows near 37°F. Over 55 years of records, the warmest December 20th was in 1981 (59°F average), while the coldest was 1985 (31°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 33% of December 20th dates historically, with the wettest December 20th recording 3.76" 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 20th in Vacaville, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 57° | 52° | 54° | 0.33" | — |
| 2024 | 48° | 43° | 45° | — | — |
| 2023 | 57° | 50° | 54° | 0.74" | — |
| 2022 | 55° | 38° | 46° | — | — |
| 2021 | 47° | 42° | 44° | — | — |
| 2020 | 60° | 29° | 45° | — | — |
| 2019 | 57° | 39° | 48° | — | — |
| 2018 | 54° | 40° | 47° | 0.05" | — |
| 2017 | 59° | 35° | 47° | 0.1" | — |
| 2016 | 58° | 31° | 45° | — | — |
| 2015 | 50° | 33° | 42° | 0.94" | — |
| 2014 | 57° | 52° | 54° | — | — |
| 2013 | 67° | 35° | 51° | — | — |
| 2012 | 54° | 26° | 40° | — | — |
| 2011 | 53° | 31° | 42° | — | — |
| 2010 | 52° | 43° | 47° | 0.79" | — |
| 2009 | 51° | 47° | 49° | 0.05" | — |
| 2008 | 53° | 32° | 43° | — | — |
| 2007 | 56° | 37° | 46° | 0.84" | — |
| 2006 | 52° | 26° | 39° | — | — |
| 2005 | 60° | 44° | 52° | 0.25" | — |
| 2004 | 43° | 39° | 41° | 0.03" | — |
| 2003 | 53° | 47° | 50° | 0.69" | — |
| 2002 | 51° | 42° | 47° | 1.85" | — |
| 2001 | 51° | 42° | 47° | 0.97" | — |
| 2000 | 61° | 36° | 48° | — | — |
| 1999 | 76° | 41° | 58° | — | — |
| 1998 | 48° | 33° | 41° | — | — |
| 1997 | 56° | 33° | 44° | — | — |
| 1996 | 45° | 35° | 40° | — | — |
| 1995 | 55° | 35° | 45° | — | — |
| 1994 | 48° | 41° | 45° | — | — |
| 1993 | 39° | 31° | 35° | — | — |
| 1992 | 48° | 35° | 42° | — | — |
| 1991 | 54° | 32° | 43° | — | — |
| 1990 | 45° | 17° | 31° | — | — |
| 1989 | 42° | 32° | 37° | — | — |
| 1988 | 59° | 42° | 51° | 0.18" | — |
| 1987 | 50° | 30° | 40° | — | — |
| 1986 | 64° | 37° | 51° | — | — |
| 1985coldest | 38° | 25° | 31° | — | — |
| 1984 | 56° | 29° | 42° | — | — |
| 1983 | 54° | 32° | 43° | — | — |
| 1982 | 52° | 41° | 46° | 0.64" | — |
| 1981warmest | 64° | 54° | 59° | 3.76" | — |
| 1980 | 58° | 39° | 48° | — | — |
| 1979 | 50° | 44° | 47° | 0.56" | — |
| 1978 | 49° | 25° | 37° | — | — |
| 1977 | 52° | 38° | 45° | — | — |
| 1976 | 66° | 31° | 48° | — | — |
| 1975 | 62° | 27° | 44° | — | — |
| 1974 | 43° | 38° | 40° | — | — |
| 1973 | 47° | 40° | 43° | 0.03" | — |
| 1972 | 59° | 49° | 54° | — | — |
| 1971 | 48° | 25° | 36° | — | — |