Weather on December 9
Vallejo, CA
55 Years of Data
Avg High
58°F
Avg Low
40°F
Warmest
1996
58°F avg
Coldest
1972
31°F avg
About This Date
December 9th in Vallejo, CA typically brings cool winter weather, with average highs around 58°F and lows near 40°F. Over 55 years of records, the warmest December 9th was in 1996 (58°F average), while the coldest was 1972 (31°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 31% of December 9th dates historically, with the wettest December 9th recording 2.69" of rain. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for December 9th 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 | 45° | 40° | 42° | — | — |
| 2024 | 69° | 41° | 55° | — | — |
| 2023 | 62° | 41° | 52° | — | — |
| 2022 | 54° | 40° | 47° | 0.18" | — |
| 2021 | 58° | 46° | 52° | 0.05" | — |
| 2020 | 65° | 42° | 53° | — | — |
| 2019 | 59° | 46° | 53° | 0.08" | — |
| 2018 | 56° | 44° | 50° | — | — |
| 2017 | 62° | 43° | 52° | — | — |
| 2016 | 60° | 50° | 55° | 0.36" | — |
| 2015 | 62° | 52° | 57° | 0.2" | — |
| 2014 | 62° | 52° | 57° | — | — |
| 2013 | 49° | 19° | 34° | — | — |
| 2012 | 70° | 36° | 53° | — | — |
| 2011 | 62° | 30° | 46° | — | — |
| 2010 | 62° | 50° | 56° | 0.13" | — |
| 2009 | 46° | 21° | 34° | — | — |
| 2008 | 55° | 28° | 42° | — | — |
| 2007 | 56° | 28° | 42° | — | — |
| 2006 | 63° | 50° | 56° | 0.23" | — |
| 2005 | 65° | 32° | 48° | — | — |
| 2004 | 63° | 45° | 54° | — | — |
| 2003 | 53° | 42° | 48° | 0.38" | — |
| 2002 | 53° | 41° | 47° | 1.02" | — |
| 2001 | 60° | 42° | 51° | 0.15" | — |
| 2000 | 55° | 41° | 48° | — | — |
| 1999 | 58° | 43° | 50° | 1.37" | — |
| 1998 | 63° | 36° | 49° | — | — |
| 1997 | 56° | 38° | 47° | — | — |
| 1996warmest | 62° | 53° | 58° | 0.38" | — |
| 1995 | 55° | 51° | 53° | — | — |
| 1994 | 52° | 29° | 40° | — | — |
| 1993 | 57° | 50° | 54° | 2.24" | — |
| 1992 | 63° | 46° | 54° | 2.69" | — |
| 1991 | 60° | 37° | 49° | — | — |
| 1990 | 62° | 35° | 49° | — | — |
| 1989 | 62° | 43° | 52° | — | — |
| 1988 | 58° | 42° | 50° | — | — |
| 1987 | 64° | 48° | 56° | — | — |
| 1986 | 60° | 35° | 48° | — | — |
| 1985 | 58° | 37° | 47° | 0.25" | — |
| 1984 | 58° | 41° | 49° | — | — |
| 1983 | 59° | 44° | 52° | 1.02" | — |
| 1982 | 62° | 43° | 52° | — | — |
| 1981 | 58° | 43° | 50° | — | — |
| 1980 | 55° | 37° | 46° | — | — |
| 1979 | 61° | 46° | 53° | — | — |
| 1978 | 51° | 32° | 42° | — | — |
| 1977 | 55° | 38° | 46° | — | — |
| 1976 | 59° | 40° | 49° | — | — |
| 1975 | 52° | 41° | 46° | — | — |
| 1974 | 59° | 40° | 49° | — | — |
| 1973 | 54° | 44° | 49° | — | — |
| 1972coldest | 40° | 22° | 31° | — | — |
| 1971 | 60° | 38° | 49° | 0.13" | — |
55 years of data from VALLEJO