Weather on December 17
Vallejo, CA
55 Years of Data
Avg High
56°F
Avg Low
39°F
Warmest
1998
57°F avg
Coldest
2008
38°F avg
About This Date
December 17th in Vallejo, CA typically brings cool winter weather, with average highs around 56°F and lows near 39°F. Over 55 years of records, the warmest December 17th was in 1998 (57°F average), while the coldest was 2008 (38°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 33% of December 17th dates historically, with the wettest December 17th recording 3.86" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for December 17th in Vallejo, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 48° | 57° | 0.38" | — |
| 2024 | 56° | 44° | 50° | — | — |
| 2023 | 58° | 44° | 51° | 0.41" | — |
| 2022 | 54° | 37° | 45° | — | — |
| 2021 | 54° | 37° | 45° | — | — |
| 2020 | 60° | 47° | 53° | — | — |
| 2019 | 52° | 44° | 48° | — | — |
| 2018 | 59° | 49° | 54° | 0.94" | — |
| 2017 | 65° | 46° | 55° | — | — |
| 2016 | 54° | 33° | 43° | — | — |
| 2015 | 60° | 40° | 50° | — | — |
| 2014 | 57° | 43° | 50° | 0.58" | — |
| 2013 | 64° | 35° | 50° | — | — |
| 2012 | 60° | 40° | 50° | 0.05" | — |
| 2011 | 60° | 33° | 47° | — | — |
| 2010 | 54° | 45° | 49° | 1.07" | — |
| 2009 | 58° | 40° | 49° | — | — |
| 2008coldest | 52° | 24° | 38° | — | — |
| 2007 | 53° | 44° | 49° | 0.56" | — |
| 2006 | 54° | 26° | 40° | — | — |
| 2005 | 45° | 37° | 41° | 0.97" | — |
| 2004 | 59° | 34° | 46° | — | — |
| 2003 | 58° | 36° | 47° | — | — |
| 2002 | 55° | 35° | 45° | — | — |
| 2001 | 58° | 33° | 45° | 3.86" | — |
| 2000 | 66° | 32° | 49° | — | — |
| 1999 | 65° | 37° | 51° | — | — |
| 1998warmest | 66° | 48° | 57° | — | — |
| 1997 | 49° | 44° | 46° | — | — |
| 1996 | 65° | 37° | 51° | — | — |
| 1995 | 53° | 36° | 44° | — | — |
| 1994 | 46° | 40° | 43° | — | — |
| 1993 | 48° | 38° | 43° | 0.03" | — |
| 1992 | 53° | 38° | 45° | 0.2" | — |
| 1991 | 55° | 35° | 45° | — | — |
| 1990 | 56° | 34° | 45° | — | — |
| 1989 | 52° | 33° | 42° | — | — |
| 1988 | 56° | 46° | 51° | — | — |
| 1987 | 54° | 36° | 45° | 1.5" | — |
| 1986 | 59° | 35° | 47° | — | — |
| 1985 | 44° | 33° | 39° | — | — |
| 1984 | 49° | 31° | 40° | — | — |
| 1983 | 59° | 44° | 52° | 0.03" | — |
| 1982 | 61° | 52° | 56° | 0.3" | — |
| 1981 | 63° | 45° | 54° | — | — |
| 1980 | 63° | 38° | 50° | — | — |
| 1979 | 58° | 39° | 48° | — | — |
| 1978 | 56° | 32° | 44° | 0.25" | — |
| 1977 | 57° | 42° | 50° | 2.46" | — |
| 1976 | 58° | 41° | 49° | — | — |
| 1975 | 59° | 38° | 48° | — | — |
| 1974 | 50° | 41° | 46° | — | — |
| 1973 | 56° | 44° | 50° | 0.13" | — |
| 1972 | 44° | 35° | 40° | 1.73" | — |
| 1971 | 52° | 34° | 43° | — | — |
55 years of data from VALLEJO