Weather on January 18
Santa Rosa, CA
55 Years of Data
Avg High
60°F
Avg Low
41°F
Warmest
2021
64°F avg
Coldest
1984
42°F avg
About This Date
January 18th in Santa Rosa, CA typically brings mild winter weather, with average highs around 60°F and lows near 41°F. Over 56 years of records, the warmest January 18th was in 2021 (64°F average), while the coldest was 1984 (42°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 30% of January 18th dates historically, with the wettest January 18th recording 3.76" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for January 18th in Santa Rosa, CA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 67° | 34° | 50° | — | — |
| 2025 | 57° | 41° | 49° | — | — |
| 2024 | 60° | 47° | 53° | — | — |
| 2023 | 53° | 32° | 43° | — | — |
| 2022 | 57° | 38° | 47° | — | — |
| 2021warmest | 80° | 49° | 64° | — | — |
| 2020 | 55° | 36° | 45° | — | — |
| 2019 | 59° | 47° | 53° | 0.76" | — |
| 2018 | 57° | 51° | 54° | 0.81" | — |
| 2017 | 50° | 43° | 46° | — | — |
| 2016 | 57° | 51° | 54° | — | — |
| 2015 | 61° | 52° | 56° | — | — |
| 2014 | 73° | 46° | 60° | — | — |
| 2013 | 63° | 39° | 51° | — | — |
| 2012 | 57° | 30° | 44° | — | — |
| 2011 | 69° | 39° | 54° | — | — |
| 2010 | 56° | 48° | 52° | 2.92" | — |
| 2009 | 70° | 36° | 53° | — | — |
| 2008 | 62° | 32° | 47° | — | — |
| 2007 | 62° | 27° | 44° | — | — |
| 2006 | 55° | 45° | 50° | 2.69" | — |
| 2005 | 53° | 42° | 48° | — | — |
| 2004 | 53° | 45° | 49° | — | — |
| 2003 | 60° | 41° | 51° | — | — |
| 2002 | 59° | 33° | 46° | — | — |
| 2001 | 54° | 32° | 43° | — | — |
| 2000 | 60° | 47° | 53° | 1.65" | — |
| 1999 | 60° | 53° | 57° | 1.45" | — |
| 1998 | 61° | 49° | 55° | 3.35" | — |
| 1997 | 57° | 40° | 48° | — | — |
| 1996 | 58° | 44° | 51° | 3.28" | — |
| 1995 | 56° | 41° | 48° | — | — |
| 1994 | 68° | 37° | 53° | — | — |
| 1993 | 57° | 45° | 51° | 0.41" | — |
| 1992 | 59° | 37° | 48° | — | — |
| 1991 | 66° | 39° | 53° | — | — |
| 1990 | 61° | 36° | 48° | — | — |
| 1989 | 63° | 35° | 49° | — | — |
| 1988 | 56° | 39° | 47° | 0.03" | — |
| 1987 | 59° | 31° | 45° | — | — |
| 1986 | 59° | 47° | 53° | 0.03" | — |
| 1985 | 58° | 31° | 44° | — | — |
| 1984coldest | 52° | 33° | 42° | 0.03" | — |
| 1983 | 54° | 48° | 51° | 0.66" | — |
| 1982 | 54° | 38° | 46° | — | — |
| 1981 | 57° | 43° | 50° | 0.25" | — |
| 1980 | 58° | 37° | 47° | — | — |
| 1979 | 59° | 36° | 47° | — | — |
| 1978 | 58° | 45° | 51° | 0.2" | — |
| 1977 | 54° | 32° | 43° | — | — |
| 1976 | 74° | 35° | 54° | — | — |
| 1975 | 57° | 37° | 47° | — | — |
| 1974 | 61° | 54° | 57° | 1.8" | — |
| 1973 | 55° | 47° | 51° | 3.76" | — |
| 1972 | 55° | 41° | 48° | — | — |
| 1971 | 68° | 47° | 57° | — | — |
56 years of data from SANTA ROSA