Weather on December 17
Santa Rosa, CA
55 Years of Data
Avg High
58°F
Avg Low
39°F
Warmest
2025
60°F avg
Coldest
2005
40°F avg
About This Date
December 17th in Santa Rosa, 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 17th was in 2025 (60°F average), while the coldest was 2005 (40°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 35% of December 17th dates historically, with the wettest December 17th recording 4.17" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in Santa Rosa, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 68° | 52° | 60° | 0.56" | — |
| 2024 | 61° | 47° | 54° | — | — |
| 2023 | 54° | 40° | 47° | 0.46" | — |
| 2022 | 55° | 27° | 41° | — | — |
| 2021 | 54° | 31° | 42° | — | — |
| 2020 | 58° | 45° | 51° | 1.7" | — |
| 2019 | 57° | 36° | 46° | — | — |
| 2018 | 57° | 46° | 52° | 0.76" | — |
| 2017 | 66° | 43° | 54° | — | — |
| 2016 | 50° | 35° | 43° | — | — |
| 2015 | 52° | 42° | 47° | — | — |
| 2014 | 54° | 47° | 50° | — | — |
| 2013 | 64° | 47° | 55° | — | — |
| 2012 | 56° | 42° | 49° | — | — |
| 2011 | 64° | 31° | 47° | — | — |
| 2010 | 48° | 43° | 45° | 0.64" | — |
| 2009 | 58° | 46° | 52° | — | — |
| 2008 | 54° | 27° | 40° | — | — |
| 2007 | 52° | 42° | 47° | 0.71" | — |
| 2006 | 55° | 30° | 43° | — | — |
| 2005coldest | 44° | 36° | 40° | 0.2" | — |
| 2004 | 64° | 37° | 51° | — | — |
| 2003 | 57° | 33° | 45° | — | — |
| 2002 | 55° | 44° | 50° | 0.91" | — |
| 2001 | 60° | 46° | 53° | 2.21" | — |
| 2000 | 66° | 37° | 52° | — | — |
| 1999 | 65° | 38° | 51° | — | — |
| 1998 | 70° | 40° | 55° | — | — |
| 1997 | 53° | 47° | 50° | 0.28" | — |
| 1996 | 72° | 39° | 55° | — | — |
| 1995 | 58° | 37° | 47° | — | — |
| 1994 | 59° | 41° | 50° | 0.03" | — |
| 1993 | 52° | 33° | 42° | — | — |
| 1992 | 52° | 45° | 48° | 0.25" | — |
| 1991 | 54° | 37° | 45° | — | — |
| 1990 | 61° | 36° | 48° | — | — |
| 1989 | 59° | 34° | 46° | — | — |
| 1988 | 55° | 35° | 45° | — | — |
| 1987 | 45° | — | — | 0.2" | — |
| 1986 | 61° | 33° | 47° | — | — |
| 1985 | 57° | 29° | 43° | — | — |
| 1984 | 49° | 35° | 42° | — | — |
| 1983 | 61° | 49° | 55° | 0.3" | — |
| 1982 | 62° | 50° | 56° | 1.14" | — |
| 1981 | 63° | 36° | 49° | — | — |
| 1980 | 63° | 36° | 49° | — | — |
| 1979 | 62° | 30° | 46° | — | — |
| 1978 | 60° | 45° | 52° | 0.99" | — |
| 1977 | 58° | 40° | 49° | 1.09" | — |
| 1976 | 64° | 28° | 46° | — | — |
| 1975 | 60° | 30° | 45° | — | — |
| 1974 | 64° | 37° | 51° | — | — |
| 1973 | 61° | 50° | 55° | 0.84" | — |
| 1972 | 50° | 40° | 45° | 4.17" | — |
| 1971 | 58° | 29° | 43° | — | — |
55 years of data from SANTA ROSA