Weather on September 1
San Ramon, CA
55 Years of Data
Avg High
85°F
Avg Low
59°F
Warmest
2004
94°F avg
Coldest
2012
53°F avg
About This Date
September 1st in San Ramon, CA typically brings warm fall weather, with average highs around 85°F and lows near 59°F — a 26°F daily swing. Over 54 years of records, the warmest September 1st was in 2004 (94°F average), while the coldest was 2012 (53°F) — a 41°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.6°F cooler on this date compared to 20-30 years ago.
Planning for September 1st in San Ramon, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 74° | 83° | — | — |
| 2024 | 85° | 60° | 72° | — | — |
| 2023 | 82° | 52° | 67° | — | — |
| 2022 | 89° | 74° | 81° | — | — |
| 2021 | 79° | 49° | 64° | — | — |
| 2020 | 83° | 64° | 73° | — | — |
| 2019 | 88° | 68° | 78° | — | — |
| 2018 | 78° | 58° | 68° | — | — |
| 2017 | 93° | 71° | 82° | — | — |
| 2016 | 75° | 52° | 63° | — | — |
| 2015 | 72° | 53° | 62° | — | — |
| 2014 | 86° | 67° | 76° | — | — |
| 2013 | 82° | 63° | 72° | — | — |
| 2012coldest | 59° | 47° | 53° | — | — |
| 2011 | 78° | 59° | 69° | — | — |
| 2010 | 80° | 66° | 73° | — | — |
| 2009 | 77° | 60° | 69° | — | — |
| 2008 | 78° | 50° | 64° | — | — |
| 2007 | 93° | 63° | 78° | — | — |
| 2006 | 93° | 56° | 74° | — | — |
| 2005 | 91° | 58° | 74° | — | — |
| 2004warmest | 129° | 59° | 94° | — | — |
| 2003 | 100° | 61° | 80° | — | — |
| 2002 | 104° | 66° | 85° | — | — |
| 2001 | 90° | 55° | 72° | — | — |
| 2000 | 63° | 56° | 59° | — | — |
| 1999 | 79° | 49° | 64° | — | — |
| 1998 | 99° | 76° | 87° | — | — |
| 1997 | 84° | 57° | 71° | — | — |
| 1996 | 86° | 55° | 71° | — | — |
| 1995 | 77° | 54° | 65° | — | — |
| 1994 | 77° | 54° | 65° | — | — |
| 1993 | 93° | 57° | 75° | — | — |
| 1992 | 78° | 58° | 68° | — | — |
| 1991 | 90° | 57° | 73° | — | — |
| 1990 | 76° | 55° | 65° | — | — |
| 1989 | 85° | 61° | 73° | — | — |
| 1988 | 95° | 69° | 82° | — | — |
| 1987 | 89° | 67° | 78° | — | — |
| 1986 | 90° | 65° | 77° | — | — |
| 1985 | 89° | 62° | 76° | — | — |
| 1984 | 84° | 58° | 71° | — | — |
| 1983 | 72° | 52° | 62° | — | — |
| 1982 | 88° | 65° | 76° | — | — |
| 1981 | 91° | 65° | 78° | — | — |
| 1980 | 80° | 50° | 65° | — | — |
| 1979 | 82° | 56° | 69° | — | — |
| 1978 | 86° | 57° | 72° | — | — |
| 1977 | 88° | 58° | 73° | — | — |
| 1976 | 103° | 72° | 87° | — | — |
| 1975 | 84° | 47° | 65° | — | — |
| 1973 | 68° | 48° | 58° | — | — |
| 1972 | 91° | 71° | 81° | — | — |
| 1971 | 76° | 50° | 63° | — | — |
54 years of data from LIVERMORE CALIFORNIA