Weather on January 21
Santa Rosa, CA
55 Years of Data
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° | — | — |
Santa Rosa, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Santa Rosa, CA Monthly Precipitation
Average rainfall per month, in inches.
Santa Rosa, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Santa Rosa, CA
Most pleasant months in Santa Rosa, CA: July.