Weather on September 11
San Ramon, CA
55 Years of Data
Avg High
81°F
Avg Low
58°F
Warmest
2015
86°F avg
Coldest
1985
54°F avg
About This Date
September 11th in San Ramon, CA typically brings warm fall weather, with average highs around 81°F and lows near 58°F. Over 55 years of records, the warmest September 11th was in 2015 (86°F average), while the coldest was 1985 (54°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 11th dates historically. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for September 11th in San Ramon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 54° | 60° | — | — |
| 2024 | 70° | 51° | 60° | — | — |
| 2023 | 83° | 63° | 73° | — | — |
| 2022 | 76° | 66° | 71° | 0.03" | — |
| 2021 | 78° | 61° | 69° | — | — |
| 2020 | 74° | 64° | 69° | — | — |
| 2019 | 70° | 56° | 63° | — | — |
| 2018 | 83° | 60° | 71° | — | — |
| 2017 | 90° | 67° | 78° | — | — |
| 2016 | 83° | 61° | 72° | — | — |
| 2015warmest | 96° | 76° | 86° | — | — |
| 2014 | 90° | 69° | 79° | — | — |
| 2013 | 77° | 53° | 65° | — | — |
| 2012 | 82° | 61° | 71° | — | — |
| 2011 | 92° | 58° | 75° | — | — |
| 2010 | 77° | 56° | 66° | — | — |
| 2009 | 90° | 73° | 81° | — | — |
| 2008 | 74° | 47° | 60° | — | — |
| 2007 | 80° | 53° | 67° | — | — |
| 2006 | 96° | 57° | 77° | — | — |
| 2005 | 74° | 50° | 62° | — | — |
| 2004 | 94° | 56° | 75° | — | — |
| 2003 | 98° | 61° | 79° | — | — |
| 2002 | 95° | 64° | 80° | — | — |
| 2001 | 77° | 57° | 67° | — | — |
| 2000 | 93° | 53° | 73° | — | — |
| 1999 | 79° | 54° | 66° | — | — |
| 1998 | 87° | 58° | 72° | — | — |
| 1997 | 82° | 60° | 71° | — | — |
| 1996 | 69° | 53° | 61° | — | — |
| 1995 | 88° | 54° | 71° | — | — |
| 1994 | 72° | 55° | 63° | — | — |
| 1993 | 71° | 53° | 62° | — | — |
| 1992 | 74° | 57° | 65° | — | — |
| 1991 | 85° | 53° | 69° | — | — |
| 1990 | 81° | 56° | 68° | — | — |
| 1989 | 74° | 49° | 61° | — | — |
| 1988 | 83° | 57° | 70° | — | — |
| 1987 | 76° | 50° | 63° | — | — |
| 1986 | 85° | 59° | 72° | — | — |
| 1985coldest | 64° | 44° | 54° | — | — |
| 1984 | 84° | 56° | 70° | — | — |
| 1983 | 89° | 66° | 78° | — | — |
| 1982 | 82° | 62° | 72° | — | — |
| 1981 | 88° | 69° | 78° | — | — |
| 1980 | 74° | 51° | 62° | — | — |
| 1979 | 92° | 70° | 81° | — | — |
| 1978 | 68° | 53° | 61° | — | — |
| 1977 | 81° | 50° | 65° | — | — |
| 1976 | 81° | 52° | 66° | 0.13" | — |
| 1975 | 87° | 58° | 72° | — | — |
| 1974 | 95° | 67° | 81° | — | — |
| 1973 | 72° | 51° | 61° | — | — |
| 1972 | 68° | 45° | 56° | — | — |
| 1971 | 91° | 64° | 78° | — | — |
55 years of data from LIVERMORE CALIFORNIA