Weather on January 21
Santa Rosa, CA
55 Years of Data
Avg High
59°F
Avg Low
39°F
Warmest
2014
59°F avg
Coldest
1982
40°F avg
About This Date
January 21st in Santa Rosa, CA typically brings cool winter weather, with average highs around 59°F and lows near 39°F. Over 56 years of records, the warmest January 21st was in 2014 (59°F average), while the coldest was 1982 (40°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 41% of January 21st dates historically, with the wettest January 21st recording 5.87" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for January 21st 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 |
|---|---|---|---|---|---|
| 2026 | 61° | 44° | 52° | — | — |
| 2025 | 66° | 28° | 47° | — | — |
| 2024 | 59° | 53° | 56° | 0.61" | — |
| 2023 | 57° | 28° | 43° | — | — |
| 2022 | 71° | 37° | 54° | — | — |
| 2021 | 63° | 31° | 47° | — | — |
| 2020 | 55° | 40° | 47° | 1.12" | — |
| 2019 | 59° | 36° | 47° | 0.25" | — |
| 2018 | 55° | 33° | 44° | — | — |
| 2017 | 52° | 44° | 48° | — | — |
| 2016 | 61° | 49° | 55° | — | — |
| 2015 | 62° | 43° | 52° | — | — |
| 2014warmest | 72° | 47° | 59° | — | — |
| 2013 | 64° | 40° | 52° | — | — |
| 2012 | 56° | 45° | 50° | 5.87" | — |
| 2011 | 70° | 34° | 52° | — | — |
| 2010 | 51° | 42° | 47° | 2.87" | — |
| 2009 | 58° | 44° | 51° | 0.03" | — |
| 2008 | 51° | 29° | 40° | 0.13" | — |
| 2007 | 68° | 33° | 51° | — | — |
| 2006 | 58° | 47° | 52° | 0.3" | — |
| 2005 | 53° | 38° | 45° | — | — |
| 2004 | 66° | 37° | 52° | — | — |
| 2003 | 52° | 45° | 48° | 0.89" | — |
| 2002 | 55° | 37° | 46° | 0.23" | — |
| 2001 | 55° | 35° | 45° | — | — |
| 2000 | 56° | 49° | 52° | 0.41" | — |
| 1999 | 56° | 44° | 50° | 0.38" | — |
| 1998 | 52° | 35° | 43° | 0.03" | — |
| 1997 | 56° | 45° | 50° | 0.41" | — |
| 1996 | 54° | 41° | 47° | 1.27" | — |
| 1995 | 52° | 47° | 49° | 0.23" | — |
| 1994 | 55° | 47° | 51° | — | — |
| 1993 | 57° | 43° | 50° | 0.71" | — |
| 1992 | 52° | 31° | 41° | — | — |
| 1991 | 65° | 52° | 58° | — | — |
| 1990 | 59° | 31° | 45° | — | — |
| 1989 | 63° | 37° | 50° | — | — |
| 1988 | 73° | 33° | 53° | — | — |
| 1987 | 55° | 29° | 42° | — | — |
| 1986 | 57° | 39° | 48° | — | — |
| 1985 | 46° | 37° | 42° | — | — |
| 1984 | 57° | 45° | 51° | 0.13" | — |
| 1983 | 50° | 42° | 46° | — | — |
| 1982coldest | 50° | 31° | 40° | 0.97" | — |
| 1981 | 62° | 51° | 57° | 0.2" | — |
| 1980 | 62° | 30° | 46° | — | — |
| 1979 | 65° | 36° | 50° | — | — |
| 1978 | 61° | 45° | 53° | — | — |
| 1977 | 60° | 45° | 52° | 0.13" | — |
| 1976 | 70° | 31° | 50° | — | — |
| 1975 | 66° | 33° | 50° | — | — |
| 1974 | 61° | 34° | 47° | — | — |
| 1973 | 57° | 43° | 50° | 1.04" | — |
| 1972 | 53° | 50° | 52° | 0.48" | — |
| 1971 | 66° | 34° | 50° | — | — |
56 years of data from SANTA ROSA