Weather on August 20
Santa Rosa, CA
55 Years of Data
Avg High
80°F
Avg Low
53°F
Warmest
2022
76°F avg
Coldest
1987
57°F avg
About This Date
August 20th in Santa Rosa, CA typically brings warm summer weather, with average highs around 80°F and lows near 53°F — a 27°F daily swing. Over 55 years of records, the warmest August 20th was in 2022 (76°F average), while the coldest was 1987 (57°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 5% of August 20th dates historically, with the wettest August 20th recording 2.54" of rain. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Santa Rosa, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 52° | 73° | — | — |
| 2024 | 92° | 52° | 72° | — | — |
| 2023 | 86° | 60° | 73° | — | — |
| 2022warmest | 96° | 55° | 76° | — | — |
| 2021 | 76° | 54° | 65° | — | — |
| 2020 | 95° | 53° | 74° | — | — |
| 2019 | 80° | 58° | 69° | — | — |
| 2018 | 82° | 50° | 66° | — | — |
| 2017 | 73° | 55° | 64° | — | — |
| 2016 | 76° | 54° | 65° | — | — |
| 2015 | 75° | 55° | 65° | — | — |
| 2014 | 65° | 56° | 60° | — | — |
| 2013 | 77° | 57° | 67° | — | — |
| 2012 | 82° | 46° | 64° | — | — |
| 2011 | 71° | 54° | 62° | — | — |
| 2010 | 72° | 52° | 62° | — | — |
| 2009 | 71° | 56° | 63° | — | — |
| 2008 | 83° | 55° | 69° | — | — |
| 2007 | 85° | 55° | 70° | — | — |
| 2006 | 72° | 51° | 61° | — | — |
| 2005 | 73° | 52° | 62° | 0.05" | — |
| 2004 | 81° | 56° | 68° | — | — |
| 2003 | 81° | 57° | 69° | — | — |
| 2002 | 86° | 52° | 69° | — | — |
| 2001 | 70° | 52° | 61° | — | — |
| 2000 | 83° | 52° | 67° | — | — |
| 1999 | 84° | 53° | 69° | — | — |
| 1998 | 72° | 53° | 62° | — | — |
| 1997 | 74° | 55° | 64° | 2.54" | — |
| 1996 | 79° | 49° | 64° | — | — |
| 1995 | 92° | 58° | 75° | — | — |
| 1994 | 83° | 54° | 68° | — | — |
| 1993 | 79° | 54° | 66° | — | — |
| 1992 | 79° | 51° | 65° | — | — |
| 1991 | 74° | 54° | 64° | — | — |
| 1990 | 78° | 53° | 66° | — | — |
| 1989 | 74° | 52° | 63° | — | — |
| 1988 | 74° | 54° | 64° | — | — |
| 1987coldest | 68° | 46° | 57° | — | — |
| 1986 | 82° | 50° | 66° | — | — |
| 1985 | 73° | 49° | 61° | — | — |
| 1984 | 78° | 52° | 65° | — | — |
| 1983 | 79° | 58° | 68° | 1.22" | — |
| 1982 | 88° | 49° | 68° | — | — |
| 1981 | 77° | 50° | 64° | — | — |
| 1980 | 77° | 51° | 64° | — | — |
| 1979 | 73° | 56° | 64° | — | — |
| 1978 | 92° | 50° | 71° | — | — |
| 1977 | 85° | 53° | 69° | — | — |
| 1976 | 90° | 56° | 73° | — | — |
| 1975 | 85° | 50° | 67° | — | — |
| 1974 | 91° | 51° | 71° | — | — |
| 1973 | 88° | 47° | 67° | — | — |
| 1972 | 84° | 59° | 72° | — | — |
| 1971 | 85° | 52° | 68° | — | — |
55 years of data from SANTA ROSA