Weather on August 15
Santa Rosa, CA
55 Years of Data
Avg High
82°F
Avg Low
53°F
Warmest
2020
85°F avg
Coldest
1985
58°F avg
About This Date
August 15th in Santa Rosa, CA typically brings warm summer weather, with average highs around 82°F and lows near 53°F — a 29°F daily swing. Over 55 years of records, the warmest August 15th was in 2020 (85°F average), while the coldest was 1985 (58°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 15th dates historically, with the wettest August 15th recording 1.09" of rain. The last decade has been 6.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.5°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Santa Rosa, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 55° | 73° | — | — |
| 2024 | 93° | 55° | 74° | — | — |
| 2023 | 91° | 59° | 75° | — | — |
| 2022 | 94° | 51° | 72° | — | — |
| 2021 | 84° | 55° | 70° | — | — |
| 2020warmest | 105° | 65° | 85° | — | — |
| 2019 | 103° | 60° | 81° | — | — |
| 2018 | 79° | 57° | 68° | — | — |
| 2017 | 78° | 52° | 65° | — | — |
| 2016 | 77° | 50° | 64° | — | — |
| 2015 | 96° | 65° | 80° | — | — |
| 2014 | 81° | 54° | 67° | — | — |
| 2013 | 85° | 58° | 71° | — | — |
| 2012 | 74° | 51° | 62° | — | — |
| 2011 | 83° | 50° | 66° | — | — |
| 2010 | 74° | 53° | 63° | — | — |
| 2009 | 86° | 51° | 69° | — | — |
| 2008 | 91° | 49° | 70° | — | — |
| 2007 | 82° | 45° | 63° | — | — |
| 2006 | 71° | 52° | 61° | — | — |
| 2005 | 72° | 51° | 61° | — | — |
| 2004 | 80° | 51° | 66° | — | — |
| 2003 | 84° | 51° | 68° | — | — |
| 2002 | 74° | 53° | 63° | — | — |
| 2001 | 83° | 51° | 67° | — | — |
| 2000 | 89° | 53° | 71° | — | — |
| 1999 | 79° | 52° | 65° | — | — |
| 1998 | 85° | 53° | 69° | — | — |
| 1997 | 76° | 53° | 64° | — | — |
| 1996 | 86° | 50° | 68° | — | — |
| 1995 | 76° | 55° | 65° | — | — |
| 1994 | 94° | 53° | 73° | — | — |
| 1993 | 75° | 54° | 64° | — | — |
| 1992 | 86° | 55° | 71° | — | — |
| 1991 | 71° | 55° | 63° | — | — |
| 1990 | 73° | 54° | 63° | — | — |
| 1989 | 92° | 56° | 74° | — | — |
| 1988 | 75° | 53° | 64° | — | — |
| 1987 | 71° | 49° | 60° | — | — |
| 1986 | 66° | 54° | 60° | — | — |
| 1985coldest | 64° | 51° | 58° | — | — |
| 1984 | 81° | 50° | 65° | — | — |
| 1983 | 98° | 58° | 78° | — | — |
| 1982 | 75° | 45° | 60° | — | — |
| 1981 | 74° | 53° | 63° | — | — |
| 1980 | 78° | 49° | 63° | — | — |
| 1979 | 74° | 55° | 64° | — | — |
| 1978 | 89° | 50° | 70° | — | — |
| 1977 | 85° | 47° | 66° | — | — |
| 1976 | 72° | 52° | 62° | 1.09" | — |
| 1975 | 75° | 51° | 63° | — | — |
| 1974 | 83° | 50° | 66° | — | — |
| 1973 | 82° | 49° | 65° | — | — |
| 1972 | 78° | 45° | 61° | — | — |
| 1971 | 88° | 50° | 69° | — | — |
55 years of data from SANTA ROSA