Weather on August 20
San Ramon, CA
55 Years of Data
Avg High
83°F
Avg Low
57°F
Warmest
2004
98°F avg
Coldest
1983
60°F avg
About This Date
August 20th in San Ramon, CA typically brings warm summer weather, with average highs around 83°F and lows near 57°F — a 26°F daily swing. Over 55 years of records, the warmest August 20th was in 2004 (98°F average), while the coldest was 1983 (60°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 20th dates historically, with the wettest August 20th recording 0.51" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for August 20th 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 | 81° | 61° | 71° | — | — |
| 2024 | 80° | 51° | 66° | — | — |
| 2023 | 84° | 68° | 76° | — | — |
| 2022 | 93° | 70° | 81° | — | — |
| 2021 | 76° | 60° | 68° | — | — |
| 2020 | 94° | 65° | 79° | — | — |
| 2019 | 71° | 50° | 61° | — | — |
| 2018 | 89° | 63° | 76° | — | — |
| 2017 | 80° | 60° | 70° | — | — |
| 2016 | 81° | 68° | 74° | — | — |
| 2015 | 79° | 51° | 65° | — | — |
| 2014 | 73° | 54° | 63° | — | — |
| 2013 | 94° | 66° | 80° | — | — |
| 2012 | 84° | 67° | 75° | — | — |
| 2011 | 74° | 60° | 67° | — | — |
| 2010 | 86° | 56° | 71° | — | — |
| 2009 | 84° | 58° | 71° | — | — |
| 2008 | 73° | 48° | 61° | — | — |
| 2007 | 81° | 55° | 68° | — | — |
| 2006 | 78° | 52° | 65° | — | — |
| 2005 | 83° | 53° | 68° | — | — |
| 2004warmest | 139° | 58° | 98° | — | — |
| 2003 | 92° | 56° | 74° | — | — |
| 2002 | 84° | 51° | 68° | — | — |
| 2001 | 68° | 52° | 60° | — | — |
| 2000 | 84° | 52° | 68° | — | — |
| 1999 | 83° | 55° | 69° | — | — |
| 1998 | 75° | 48° | 62° | — | — |
| 1997 | 74° | 52° | 63° | — | — |
| 1996 | 83° | 52° | 67° | — | — |
| 1995 | 92° | 64° | 78° | — | — |
| 1994 | 85° | 54° | 69° | — | — |
| 1993 | 77° | 58° | 67° | — | — |
| 1992 | 99° | 70° | 84° | — | — |
| 1991 | 79° | 54° | 66° | — | — |
| 1990 | 78° | 55° | 67° | — | — |
| 1989 | 81° | 48° | 64° | — | — |
| 1988 | 94° | 58° | 76° | — | — |
| 1987 | 72° | 50° | 61° | — | — |
| 1986 | 92° | 69° | 80° | — | — |
| 1985 | 76° | 50° | 63° | — | — |
| 1984 | 81° | 58° | 69° | — | — |
| 1983coldest | 67° | 54° | 60° | 0.51" | — |
| 1982 | 82° | 67° | 74° | — | — |
| 1981 | 77° | 51° | 64° | — | — |
| 1980 | 80° | 57° | 69° | — | — |
| 1979 | 86° | 54° | 70° | — | — |
| 1978 | 91° | 61° | 76° | — | — |
| 1977 | 92° | 69° | 80° | — | — |
| 1976 | 75° | 58° | 66° | — | — |
| 1975 | 85° | 52° | 68° | — | — |
| 1974 | 88° | 50° | 69° | — | — |
| 1973 | 89° | 62° | 76° | — | — |
| 1972 | 74° | 55° | 64° | — | — |
| 1971 | 89° | 53° | 71° | — | — |
55 years of data from LIVERMORE CALIFORNIA