Weather on October 18
Santa Rosa, CA
55 Years of Data
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.
| 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° | — | — |
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.