Weather on October 15
Santa Rosa, CA
55 Years of Data
Avg High
78°F
Avg Low
50°F
Warmest
2020
74°F avg
Coldest
1989
55°F avg
About This Date
October 15th in Santa Rosa, CA typically brings pleasant fall weather, with average highs around 78°F and lows near 50°F — a 28°F daily swing. Over 55 years of records, the warmest October 15th was in 2020 (74°F average), while the coldest was 1989 (55°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 11% of October 15th dates historically, with the wettest October 15th recording 6.76" of rain. The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.2°F warmer on this date compared to 20-30 years ago.
Planning for October 15th 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 | 66° | 54° | 60° | 0.1" | — |
| 2024 | 82° | 50° | 66° | — | — |
| 2023 | 79° | 55° | 67° | — | — |
| 2022 | 59° | 53° | 56° | — | — |
| 2021 | 83° | 55° | 69° | — | — |
| 2020warmest | 95° | 54° | 74° | — | — |
| 2019 | 75° | 46° | 61° | — | — |
| 2018 | 84° | 51° | 68° | — | — |
| 2017 | 84° | 56° | 70° | — | — |
| 2016 | 61° | 55° | 58° | — | — |
| 2015 | 82° | 56° | 69° | — | — |
| 2014 | 69° | 56° | 62° | — | — |
| 2013 | 84° | 53° | 69° | — | — |
| 2012 | 82° | 53° | 68° | — | — |
| 2011 | 71° | 55° | 63° | — | — |
| 2010 | 89° | 53° | 71° | — | — |
| 2009 | 71° | 61° | 66° | 0.36" | — |
| 2008 | 87° | 46° | 67° | — | — |
| 2007 | 64° | 48° | 56° | 0.13" | — |
| 2006 | 63° | 52° | 57° | — | — |
| 2005 | 70° | 49° | 59° | 0.18" | — |
| 2004 | 79° | 48° | 63° | — | — |
| 2003 | 81° | 41° | 61° | — | — |
| 2002 | 63° | 48° | 55° | — | — |
| 2001 | 94° | 53° | 73° | — | — |
| 2000 | 73° | 47° | 60° | — | — |
| 1999 | 88° | 50° | 69° | — | — |
| 1998 | 74° | 48° | 61° | — | — |
| 1997 | 89° | 51° | 70° | — | — |
| 1996 | 80° | 51° | 66° | — | — |
| 1995 | 83° | 54° | 68° | — | — |
| 1994 | 70° | 52° | 61° | — | — |
| 1993 | 66° | 57° | 62° | 6.76" | — |
| 1992 | 68° | 50° | 59° | — | — |
| 1991 | 88° | 45° | 66° | — | — |
| 1990 | 80° | 47° | 63° | — | — |
| 1989coldest | 66° | 45° | 55° | — | — |
| 1988 | 88° | 49° | 68° | — | — |
| 1987 | 74° | 48° | 61° | — | — |
| 1986 | 79° | 42° | 60° | — | — |
| 1985 | 82° | 41° | 62° | — | — |
| 1984 | 71° | 47° | 59° | — | — |
| 1983 | 79° | 45° | 62° | — | — |
| 1982 | 74° | 50° | 62° | — | — |
| 1981 | 73° | 40° | 56° | — | — |
| 1980 | 72° | 42° | 57° | — | — |
| 1979 | 79° | 58° | 68° | — | — |
| 1978 | 86° | 53° | 70° | — | — |
| 1977 | 88° | 47° | 67° | — | — |
| 1976 | 82° | 45° | 63° | — | — |
| 1975 | 79° | 43° | 61° | — | — |
| 1974 | 94° | 44° | 69° | — | — |
| 1973 | 82° | 48° | 65° | — | — |
| 1972 | 68° | 52° | 60° | 1.14" | — |
| 1971 | 75° | 47° | 61° | — | — |
55 years of data from SANTA ROSA