Weather on October 18
Santa Rosa, CA
55 Years of Data
Avg High
78°F
Avg Low
48°F
Warmest
2012
74°F avg
Coldest
1984
50°F avg
About This Date
October 18th in Santa Rosa, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 48°F — a 30°F daily swing. Over 55 years of records, the warmest October 18th was in 2012 (74°F average), while the coldest was 1984 (50°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 11% of October 18th dates historically, with the wettest October 18th recording 1.02" of rain. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Santa Rosa, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 49° | 65° | — | — |
| 2024 | 81° | 46° | 63° | — | — |
| 2023 | 88° | 49° | 68° | — | — |
| 2022 | 84° | 49° | 66° | — | — |
| 2021 | 65° | 41° | 53° | 0.38" | — |
| 2020 | 94° | 50° | 72° | — | — |
| 2019 | 71° | 46° | 59° | — | — |
| 2018 | 77° | 50° | 64° | — | — |
| 2017 | 82° | 44° | 63° | — | — |
| 2016 | 71° | 50° | 61° | — | — |
| 2015 | 74° | 54° | 64° | — | — |
| 2014 | 77° | 57° | 67° | — | — |
| 2013 | 79° | 48° | 63° | — | — |
| 2012warmest | 88° | 61° | 74° | — | — |
| 2011 | 78° | 52° | 65° | — | — |
| 2010 | 70° | 53° | 61° | — | — |
| 2009 | 68° | 54° | 61° | — | — |
| 2008 | 77° | 47° | 62° | — | — |
| 2007 | 67° | 44° | 55° | — | — |
| 2006 | 78° | 41° | 60° | — | — |
| 2005 | 81° | 48° | 64° | — | — |
| 2004 | 63° | 46° | 54° | 0.08" | — |
| 2003 | 85° | 47° | 66° | — | — |
| 2002 | 69° | 50° | 60° | — | — |
| 2001 | 82° | 47° | 64° | — | — |
| 2000 | 77° | 47° | 62° | — | — |
| 1999 | 79° | 44° | 61° | — | — |
| 1998 | 79° | 44° | 61° | — | — |
| 1997 | 83° | 46° | 64° | — | — |
| 1996 | 71° | 46° | 59° | 0.33" | — |
| 1995 | 85° | 53° | 69° | — | — |
| 1994 | 74° | 43° | 58° | — | — |
| 1993 | 74° | 45° | 59° | — | — |
| 1992 | 79° | 46° | 62° | — | — |
| 1991 | 87° | 50° | 69° | — | — |
| 1990 | 77° | 51° | 64° | 0.05" | — |
| 1989 | 87° | 51° | 69° | — | — |
| 1988 | 91° | 55° | 73° | — | — |
| 1987 | 86° | 48° | 67° | — | — |
| 1986 | 72° | 42° | 57° | — | — |
| 1985 | 64° | 46° | 55° | — | — |
| 1984coldest | 61° | 39° | 50° | 0.08" | — |
| 1983 | 79° | 45° | 62° | — | — |
| 1982 | 81° | 43° | 62° | — | — |
| 1981 | 80° | 45° | 62° | — | — |
| 1980 | 75° | 40° | 57° | — | — |
| 1979 | 74° | 51° | 62° | 1.02" | — |
| 1978 | 83° | 51° | 67° | — | — |
| 1977 | 68° | 49° | 58° | — | — |
| 1976 | 78° | 49° | 63° | — | — |
| 1975 | 79° | 53° | 66° | — | — |
| 1974 | 90° | 46° | 68° | — | — |
| 1973 | 78° | 50° | 64° | — | — |
| 1972 | 74° | 47° | 60° | — | — |
| 1971 | 68° | 34° | 51° | — | — |
55 years of data from SANTA ROSA