Weather on August 15
San Ramon, CA
55 Years of Data
Avg High
85°F
Avg Low
59°F
Warmest
2004
100°F avg
Coldest
1976
53°F avg
About This Date
August 15th in San Ramon, CA typically brings warm summer weather, with average highs around 85°F and lows near 59°F — a 26°F daily swing. Over 55 years of records, the warmest August 15th was in 2004 (100°F average), while the coldest was 1976 (53°F) — a 47°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 15th dates historically. The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.
Planning for August 15th in San Ramon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 55° | 69° | — | — |
| 2024 | 86° | 55° | 71° | — | — |
| 2023 | 90° | 70° | 80° | — | — |
| 2022 | 88° | 69° | 78° | — | — |
| 2021 | 90° | 70° | 80° | — | — |
| 2020 | 97° | 78° | 87° | — | — |
| 2019 | 94° | 75° | 84° | — | — |
| 2018 | 76° | 51° | 63° | — | — |
| 2017 | 63° | 50° | 56° | — | — |
| 2016 | 89° | 65° | 77° | — | — |
| 2015 | 78° | 63° | 70° | — | — |
| 2014 | 80° | 63° | 71° | — | — |
| 2013 | 83° | 65° | 74° | — | — |
| 2012 | 94° | 63° | 78° | — | — |
| 2011 | 82° | 63° | 72° | — | — |
| 2010 | 75° | 56° | 65° | — | — |
| 2009 | 87° | 59° | 73° | — | — |
| 2008 | 98° | 69° | 84° | — | — |
| 2007 | 89° | 58° | 73° | — | — |
| 2006 | 79° | 55° | 67° | — | — |
| 2005 | 81° | 54° | 67° | — | — |
| 2004warmest | 140° | 59° | 100° | — | — |
| 2003 | 91° | 55° | 73° | — | — |
| 2002 | 91° | 56° | 73° | — | — |
| 2001 | 88° | 52° | 70° | — | — |
| 2000 | 95° | 56° | 75° | — | — |
| 1999 | 86° | 50° | 68° | — | — |
| 1998 | 95° | 70° | 82° | — | — |
| 1997 | 78° | 55° | 67° | — | — |
| 1996 | 99° | 61° | 80° | — | — |
| 1995 | 88° | 57° | 72° | — | — |
| 1994 | 100° | 64° | 82° | — | — |
| 1993 | 72° | 55° | 63° | — | — |
| 1992 | 91° | 73° | 82° | — | — |
| 1991 | 72° | 55° | 63° | — | — |
| 1990 | 71° | 58° | 64° | — | — |
| 1989 | 93° | 66° | 80° | — | — |
| 1988 | 77° | 44° | 61° | — | — |
| 1987 | 68° | 42° | 55° | — | — |
| 1986 | 85° | 60° | 72° | — | — |
| 1985 | 78° | 51° | 65° | — | — |
| 1984 | 87° | 62° | 75° | — | — |
| 1983 | 85° | 69° | 77° | — | — |
| 1982 | 73° | 58° | 65° | — | — |
| 1981 | 80° | 66° | 73° | — | — |
| 1980 | 67° | 46° | 56° | — | — |
| 1979 | 78° | 54° | 66° | — | — |
| 1978 | 91° | 61° | 76° | — | — |
| 1977 | 90° | 55° | 72° | — | — |
| 1976coldest | 57° | 49° | 53° | 0.38" | — |
| 1975 | 80° | 60° | 70° | — | — |
| 1974 | 86° | 49° | 67° | — | — |
| 1973 | 98° | 71° | 85° | — | — |
| 1972 | 70° | 46° | 58° | — | — |
| 1971 | 92° | 63° | 77° | — | — |
55 years of data from LIVERMORE CALIFORNIA