Weather on October 20
Santa Rosa, CA
55 Years of Data
Avg High
76°F
Avg Low
48°F
Warmest
1991
74°F avg
Coldest
1971
52°F avg
About This Date
October 20th in Santa Rosa, CA typically brings pleasant fall weather, with average highs around 76°F and lows near 48°F — a 28°F daily swing. Over 55 years of records, the warmest October 20th was in 1991 (74°F average), while the coldest was 1971 (52°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 15% of October 20th dates historically, with the wettest October 20th recording 2.01" of rain. The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Santa Rosa, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 47° | 64° | — | — |
| 2024 | 82° | 46° | 64° | — | — |
| 2023 | 90° | 56° | 73° | — | — |
| 2022 | 91° | 49° | 70° | — | — |
| 2021 | 66° | 50° | 58° | 2.01" | — |
| 2020 | 86° | 45° | 65° | — | — |
| 2019 | 77° | 45° | 61° | — | — |
| 2018 | 82° | 49° | 65° | — | — |
| 2017 | 63° | 45° | 54° | 1.02" | — |
| 2016 | 85° | 56° | 70° | — | — |
| 2015 | 85° | 57° | 71° | — | — |
| 2014 | 69° | 53° | 61° | — | — |
| 2013 | 78° | 44° | 61° | — | — |
| 2012 | 77° | 51° | 64° | — | — |
| 2011 | 73° | 48° | 61° | — | — |
| 2010 | 75° | 49° | 62° | — | — |
| 2009 | 73° | 51° | 62° | — | — |
| 2008 | 76° | 47° | 61° | — | — |
| 2007 | 66° | 45° | 55° | 0.36" | — |
| 2006 | 89° | 46° | 68° | — | — |
| 2005 | 76° | 48° | 62° | — | — |
| 2004 | 63° | 46° | 54° | 0.74" | — |
| 2003 | 88° | 47° | 67° | — | — |
| 2002 | 74° | 46° | 60° | — | — |
| 2001 | 68° | 47° | 57° | — | — |
| 2000 | 73° | 48° | 61° | — | — |
| 1999 | 85° | 43° | 64° | — | — |
| 1998 | 88° | 51° | 69° | — | — |
| 1997 | 67° | 46° | 56° | — | — |
| 1996 | 67° | 40° | 53° | — | — |
| 1995 | 71° | 50° | 61° | — | — |
| 1994 | 75° | 45° | 60° | — | — |
| 1993 | 78° | 46° | 62° | — | — |
| 1992 | 74° | 58° | 66° | 0.1" | — |
| 1991warmest | 91° | 57° | 74° | — | — |
| 1990 | 75° | 42° | 59° | — | — |
| 1989 | 82° | 52° | 67° | — | — |
| 1988 | 84° | 50° | 67° | — | — |
| 1987 | 67° | 50° | 58° | — | — |
| 1986 | 61° | 47° | 54° | — | — |
| 1985 | 59° | 48° | 54° | — | — |
| 1984 | 67° | 42° | 54° | — | — |
| 1983 | 86° | 47° | 66° | — | — |
| 1982 | 73° | 56° | 64° | — | — |
| 1981 | 83° | 47° | 65° | — | — |
| 1980 | 82° | 43° | 62° | — | — |
| 1979 | 65° | 45° | 55° | 0.48" | — |
| 1978 | 73° | 51° | 62° | — | — |
| 1977 | 70° | 51° | 60° | — | — |
| 1976 | 83° | 40° | 61° | — | — |
| 1975 | 86° | 49° | 67° | — | — |
| 1974 | 83° | 42° | 62° | — | — |
| 1973 | 68° | 55° | 62° | 0.23" | — |
| 1972 | 72° | 54° | 63° | — | — |
| 1971coldest | 70° | 34° | 52° | 0.36" | — |
55 years of data from SANTA ROSA