Weather on October 15
San Ramon, CA
55 Years of Data
Avg High
75°F
Avg Low
54°F
Warmest
1977
79°F avg
Coldest
2025
47°F avg
About This Date
October 15th in San Ramon, CA typically brings pleasant fall weather, with average highs around 75°F and lows near 54°F. Over 53 years of records, the warmest October 15th was in 1977 (79°F average), while the coldest was 2025 (47°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 9% of October 15th dates historically, with the wettest October 15th recording 1.98" of rain. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for October 15th in San Ramon, CA? Great weather for outdoor activities.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025coldest | 50° | 44° | 47° | 0.3" | — |
| 2024 | 76° | 55° | 65° | — | — |
| 2023 | 70° | 54° | 62° | — | — |
| 2022 | 79° | 61° | 70° | — | — |
| 2021 | 69° | 53° | 61° | — | — |
| 2020 | 84° | 68° | 76° | — | — |
| 2019 | 73° | 57° | 65° | — | — |
| 2018 | 72° | 56° | 64° | — | — |
| 2017 | 77° | 58° | 67° | — | — |
| 2016 | 56° | 53° | 54° | 1.55" | — |
| 2015 | 85° | 67° | 76° | — | — |
| 2014 | 63° | 51° | 57° | 0.48" | — |
| 2013 | 72° | 56° | 64° | — | — |
| 2012 | 74° | 58° | 66° | — | — |
| 2011 | 81° | 64° | 72° | — | — |
| 2010 | 88° | 70° | 79° | — | — |
| 2009 | 64° | 55° | 60° | — | — |
| 2008 | 78° | 59° | 69° | — | — |
| 2007 | 69° | 41° | 55° | — | — |
| 2006 | 57° | 52° | 54° | — | — |
| 2005 | 67° | 50° | 58° | — | — |
| 2004 | 84° | 55° | 70° | — | — |
| 2003 | 76° | 48° | 62° | — | — |
| 2002 | 68° | 49° | 58° | — | — |
| 2001 | 91° | 60° | 76° | — | — |
| 2000 | 79° | 50° | 64° | — | — |
| 1999 | 83° | 58° | 70° | — | — |
| 1998 | 71° | 46° | 59° | — | — |
| 1997 | 85° | 55° | 70° | — | — |
| 1996 | 79° | 48° | 63° | — | — |
| 1995 | 72° | 55° | 63° | — | — |
| 1994 | 68° | 48° | 58° | — | — |
| 1993 | 66° | 55° | 61° | — | — |
| 1992 | 69° | 50° | 60° | — | — |
| 1991 | 94° | 64° | 79° | — | — |
| 1990 | 75° | 51° | 63° | — | — |
| 1989 | 67° | 43° | 55° | — | — |
| 1988 | 67° | 48° | 57° | — | — |
| 1986 | 78° | 52° | 65° | — | — |
| 1985 | 78° | 53° | 66° | — | — |
| 1984 | 71° | 53° | 62° | — | — |
| 1983 | 70° | 48° | 59° | — | — |
| 1982 | 83° | 61° | 72° | — | — |
| 1981 | 65° | 46° | 55° | — | — |
| 1979 | 69° | 56° | 62° | 0.03" | — |
| 1978 | 93° | 63° | 78° | — | — |
| 1977warmest | 91° | 66° | 79° | — | — |
| 1976 | 90° | 63° | 76° | — | — |
| 1975 | 75° | 55° | 65° | — | — |
| 1974 | 87° | 58° | 72° | — | — |
| 1973 | 86° | 43° | 64° | — | — |
| 1972 | 60° | 55° | 58° | 1.98" | — |
| 1971 | 83° | 41° | 62° | — | — |
53 years of data from LIVERMORE CALIFORNIA