Weather on December 9
Santa Rosa, CA
55 Years of Data
Avg High
60°F
Avg Low
40°F
Warmest
1988
59°F avg
Coldest
1972
28°F avg
About This Date
December 9th in Santa Rosa, CA typically brings mild winter weather, with average highs around 60°F and lows near 40°F. Over 55 years of records, the warmest December 9th was in 1988 (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 4.09" of rain. The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for December 9th in Santa Rosa, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 54° | 42° | 48° | — | — |
| 2024 | 64° | 34° | 49° | — | — |
| 2023 | 60° | 32° | 46° | — | — |
| 2022 | 50° | 40° | 45° | 0.41" | — |
| 2021 | 60° | 45° | 52° | — | — |
| 2020 | 66° | 34° | 50° | — | — |
| 2019 | 58° | 41° | 49° | — | — |
| 2018 | 57° | 36° | 46° | — | — |
| 2017 | 63° | 32° | 47° | — | — |
| 2016 | 57° | 53° | 55° | — | — |
| 2015 | 59° | 55° | 57° | — | — |
| 2014 | 60° | 55° | 58° | — | — |
| 2013 | 50° | 30° | 40° | — | — |
| 2012 | 69° | 48° | 59° | — | — |
| 2011 | 64° | 29° | 46° | — | — |
| 2010 | 63° | 50° | 56° | 0.43" | — |
| 2009 | 49° | 23° | 36° | — | — |
| 2008 | 60° | 36° | 48° | — | — |
| 2007 | 60° | 29° | 44° | — | — |
| 2006 | 58° | 49° | 53° | 1.27" | — |
| 2005 | 66° | 36° | 51° | — | — |
| 2004 | 66° | 49° | 57° | 0.69" | — |
| 2003 | 54° | 40° | 47° | 0.51" | — |
| 2002 | 56° | 46° | 51° | 2.31" | — |
| 2001 | 56° | 45° | 50° | 0.13" | — |
| 2000 | 54° | 45° | 49° | — | — |
| 1999 | 55° | 44° | 50° | 0.97" | — |
| 1998 | 65° | 37° | 51° | — | — |
| 1997 | 59° | 36° | 47° | 0.03" | — |
| 1996 | 59° | 54° | 56° | 2.57" | — |
| 1995 | 56° | 47° | 51° | — | — |
| 1994 | 56° | 29° | 42° | — | — |
| 1993 | 60° | 50° | 55° | 0.1" | — |
| 1992 | 59° | 52° | 55° | 4.09" | — |
| 1991 | 66° | 35° | 51° | — | — |
| 1990 | 67° | 36° | 51° | — | — |
| 1989 | 65° | 38° | 51° | — | — |
| 1988warmest | 73° | 44° | 59° | — | — |
| 1987 | 61° | 51° | 56° | 3" | — |
| 1986 | 58° | 29° | 43° | — | — |
| 1985 | 55° | 32° | 44° | — | — |
| 1984 | 62° | 48° | 55° | — | — |
| 1983 | 56° | 53° | 54° | 3.48" | — |
| 1982 | 65° | 34° | 49° | — | — |
| 1981 | 60° | 44° | 52° | — | — |
| 1980 | 61° | 29° | 45° | — | — |
| 1979 | 64° | 40° | 52° | — | — |
| 1978 | 68° | 30° | 49° | — | — |
| 1977 | 68° | 35° | 52° | — | — |
| 1976 | 65° | 33° | 49° | — | — |
| 1975 | 60° | 37° | 49° | — | — |
| 1974 | 55° | 36° | 45° | — | — |
| 1973 | 58° | 45° | 51° | — | — |
| 1972coldest | 40° | 16° | 28° | — | — |
| 1971 | 59° | 40° | 49° | — | — |
55 years of data from SANTA ROSA