Weather on September 25
San Ramon, CA
55 Years of Data
Avg High
81°F
Avg Low
56°F
Warmest
1978
86°F avg
Coldest
1986
53°F avg
About This Date
September 25th in San Ramon, CA typically brings warm fall weather, with average highs around 81°F and lows near 56°F — a 25°F daily swing. Over 55 years of records, the warmest September 25th was in 1978 (86°F average), while the coldest was 1986 (53°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 9% of September 25th dates historically, with the wettest September 25th recording 1.14" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 25th in San Ramon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 62° | 70° | 0.03" | — |
| 2024 | 93° | 53° | 73° | — | — |
| 2023 | 68° | 50° | 59° | — | — |
| 2022 | 85° | 68° | 76° | — | — |
| 2021 | 87° | 62° | 75° | — | — |
| 2020 | 77° | 51° | 64° | — | — |
| 2019 | 82° | 71° | 77° | — | — |
| 2018 | 85° | 66° | 75° | — | — |
| 2017 | 75° | 60° | 68° | — | — |
| 2016 | 83° | 64° | 73° | — | — |
| 2015 | 87° | 62° | 75° | — | — |
| 2014 | 71° | 52° | 61° | 1.14" | — |
| 2013 | 69° | 46° | 58° | — | — |
| 2012 | 79° | 61° | 70° | — | — |
| 2011 | 75° | 51° | 63° | — | — |
| 2010 | 85° | 67° | 76° | — | — |
| 2009 | 94° | 70° | 82° | — | — |
| 2008 | 85° | 47° | 66° | — | — |
| 2007 | 75° | 47° | 61° | — | — |
| 2006 | 92° | 55° | 73° | — | — |
| 2005 | 85° | 51° | 68° | — | — |
| 2004 | 87° | 56° | 71° | — | — |
| 2003 | 74° | 55° | 64° | — | — |
| 2002 | 95° | 59° | 77° | — | — |
| 2001 | 78° | 55° | 67° | — | — |
| 2000 | 91° | 55° | 73° | — | — |
| 1999 | 94° | 58° | 76° | — | — |
| 1998 | 67° | 54° | 60° | — | — |
| 1997 | 89° | 62° | 76° | — | — |
| 1996 | 85° | 53° | 69° | — | — |
| 1995 | 72° | 56° | 64° | — | — |
| 1994 | 91° | 58° | 74° | — | — |
| 1993 | 91° | 57° | 74° | — | — |
| 1992 | 86° | 57° | 72° | — | — |
| 1991 | 86° | 56° | 71° | — | — |
| 1990 | 74° | 58° | 66° | — | — |
| 1989 | 74° | 49° | 61° | — | — |
| 1988 | 70° | 44° | 57° | — | — |
| 1987 | 78° | 47° | 62° | — | — |
| 1986coldest | 59° | 46° | 53° | 0.51" | — |
| 1985 | 90° | 65° | 77° | — | — |
| 1984 | 75° | 58° | 66° | — | — |
| 1983 | 78° | 58° | 68° | — | — |
| 1982 | 75° | 60° | 68° | 0.61" | — |
| 1981 | 66° | 52° | 59° | 0.13" | — |
| 1980 | 83° | 46° | 64° | — | — |
| 1979 | 73° | 53° | 63° | — | — |
| 1978warmest | 99° | 73° | 86° | — | — |
| 1977 | 78° | 55° | 67° | — | — |
| 1976 | 83° | 50° | 66° | — | — |
| 1975 | 98° | 65° | 81° | — | — |
| 1974 | 91° | 60° | 76° | — | — |
| 1973 | 76° | 49° | 62° | — | — |
| 1972 | 79° | 48° | 63° | — | — |
| 1971 | 69° | 46° | 58° | — | — |
55 years of data from LIVERMORE CALIFORNIA