Weather on September 4
Santa Rosa, CA
55 Years of Data
Avg High
85°F
Avg Low
53°F
Warmest
2017
80°F avg
Coldest
1985
59°F avg
About This Date
September 4th in Santa Rosa, CA typically brings warm fall weather, with average highs around 85°F and lows near 53°F — a 32°F daily swing. Over 55 years of records, the warmest September 4th was in 2017 (80°F average), while the coldest was 1985 (59°F) — a 21°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
Planning for September 4th 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 | 78° | 47° | 62° | — | — |
| 2024 | 100° | 53° | 77° | — | — |
| 2023 | 82° | 55° | 69° | — | — |
| 2022 | 103° | 55° | 79° | — | — |
| 2021 | 87° | 51° | 69° | — | — |
| 2020 | 88° | 54° | 71° | — | — |
| 2019 | 91° | 53° | 72° | — | — |
| 2018 | 80° | 53° | 67° | — | — |
| 2017warmest | 96° | 65° | 80° | — | — |
| 2016 | 80° | 50° | 65° | — | — |
| 2015 | 82° | 52° | 67° | — | — |
| 2014 | 78° | 55° | 67° | — | — |
| 2013 | 82° | 56° | 69° | — | — |
| 2012 | 84° | 48° | 66° | — | — |
| 2011 | 74° | 54° | 64° | — | — |
| 2010 | 79° | 50° | 64° | — | — |
| 2009 | 88° | 49° | 68° | — | — |
| 2008 | 101° | 47° | 74° | — | — |
| 2007 | 86° | 56° | 71° | — | — |
| 2006 | 77° | 50° | 64° | — | — |
| 2005 | 77° | 53° | 65° | — | — |
| 2004 | 97° | 58° | 77° | — | — |
| 2003 | 77° | 57° | 67° | — | — |
| 2002 | 76° | 53° | 64° | — | — |
| 2001 | 81° | 52° | 66° | — | — |
| 2000 | 74° | 48° | 61° | — | — |
| 1999 | 80° | 50° | 65° | — | — |
| 1998 | 95° | 55° | 75° | — | — |
| 1997 | 93° | 56° | 74° | — | — |
| 1996 | 79° | 52° | 65° | — | — |
| 1995 | 83° | 56° | 69° | — | — |
| 1994 | 88° | 57° | 72° | — | — |
| 1993 | 78° | 54° | 66° | — | — |
| 1992 | 82° | 51° | 67° | — | — |
| 1991 | 83° | 53° | 68° | — | — |
| 1990 | 77° | 54° | 65° | — | — |
| 1989 | 79° | 52° | 65° | — | — |
| 1988 | 95° | 53° | 74° | — | — |
| 1987 | 68° | 51° | 60° | — | — |
| 1986 | 72° | 50° | 61° | — | — |
| 1985coldest | 70° | 49° | 59° | — | — |
| 1984 | 93° | 52° | 72° | — | — |
| 1983 | 97° | 56° | 76° | — | — |
| 1982 | 91° | 51° | 71° | — | — |
| 1981 | 74° | 50° | 62° | — | — |
| 1980 | 84° | 51° | 68° | — | — |
| 1979 | 86° | 53° | 70° | — | — |
| 1978 | 81° | 60° | 70° | — | — |
| 1977 | 99° | 54° | 76° | — | — |
| 1976 | 79° | 50° | 64° | — | — |
| 1975 | 100° | 51° | 76° | — | — |
| 1974 | 92° | 51° | 71° | — | — |
| 1973 | 73° | 49° | 61° | — | — |
| 1972 | 83° | 48° | 65° | — | — |
| 1971 | 97° | 50° | 73° | — | — |
55 years of data from SANTA ROSA