Weather on September 1
Santa Rosa, CA
55 Years of Data
Avg High
84°F
Avg Low
53°F
Warmest
2017
84°F avg
Coldest
2000
60°F avg
About This Date
September 1st in Santa Rosa, CA typically brings warm fall weather, with average highs around 84°F and lows near 53°F — a 31°F daily swing. Over 55 years of records, the warmest September 1st was in 2017 (84°F average), while the coldest was 2000 (60°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 1st dates historically, with the wettest September 1st recording 0.61" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for September 1st in Santa Rosa, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 54° | 75° | — | — |
| 2024 | 79° | 52° | 65° | — | — |
| 2023 | 67° | 54° | 60° | — | — |
| 2022 | 95° | 51° | 73° | — | — |
| 2021 | 75° | 53° | 64° | — | — |
| 2020 | 74° | 57° | 65° | — | — |
| 2019 | 93° | 56° | 74° | — | — |
| 2018 | 85° | 50° | 67° | — | — |
| 2017warmest | 110° | 59° | 84° | — | — |
| 2016 | 81° | 53° | 67° | — | — |
| 2015 | 84° | 56° | 70° | — | — |
| 2014 | 92° | 59° | 75° | — | — |
| 2013 | 79° | 54° | 66° | — | — |
| 2012 | 75° | 50° | 63° | — | — |
| 2011 | 81° | 48° | 64° | — | — |
| 2010 | 96° | 52° | 74° | — | — |
| 2009 | 85° | 53° | 69° | — | — |
| 2008 | 90° | 52° | 71° | — | — |
| 2007 | 92° | 52° | 72° | — | — |
| 2006 | 87° | 53° | 70° | — | — |
| 2005 | 78° | 53° | 66° | — | — |
| 2004 | 79° | 52° | 65° | — | — |
| 2003 | 91° | 49° | 70° | — | — |
| 2002 | 99° | 56° | 77° | — | — |
| 2001 | 78° | 54° | 66° | — | — |
| 2000coldest | 63° | 57° | 60° | 0.18" | — |
| 1999 | 78° | 52° | 65° | — | — |
| 1998 | 89° | 51° | 70° | — | — |
| 1997 | 82° | 56° | 69° | — | — |
| 1996 | 80° | 51° | 66° | — | — |
| 1995 | 77° | 52° | 64° | — | — |
| 1994 | 83° | 53° | 68° | — | — |
| 1993 | 86° | 55° | 71° | — | — |
| 1992 | 76° | 54° | 65° | — | — |
| 1991 | 86° | 59° | 73° | — | — |
| 1990 | 80° | 54° | 67° | — | — |
| 1989 | 81° | 53° | 67° | — | — |
| 1988 | 74° | 52° | 63° | — | — |
| 1987 | 75° | 54° | 64° | — | — |
| 1986 | 82° | 51° | 67° | — | — |
| 1985 | 83° | 55° | 69° | — | — |
| 1984 | 91° | 57° | 74° | — | — |
| 1983 | 80° | 53° | 67° | 0.61" | — |
| 1982 | 92° | 47° | 69° | — | — |
| 1981 | 93° | 52° | 72° | — | — |
| 1980 | 84° | 51° | 68° | — | — |
| 1979 | 73° | 59° | 66° | — | — |
| 1978 | 97° | 59° | 78° | — | — |
| 1977 | 81° | 48° | 64° | — | — |
| 1976 | 88° | 50° | 69° | — | — |
| 1975 | 88° | 45° | 66° | — | — |
| 1974 | 81° | 53° | 67° | — | — |
| 1973 | 85° | 48° | 66° | — | — |
| 1972 | 77° | 51° | 64° | — | — |
| 1971 | 85° | 52° | 68° | — | — |
55 years of data from SANTA ROSA