Weather on September 25
San Ramon, CA
55 Years of Data
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.
| 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° | — | — |
San Ramon, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Ramon, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
San Ramon, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Ramon, CA
San Ramon, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.