Weather on September 19
San Ramon, CA
55 Years of Data
Avg High
79°F
Avg Low
56°F
Warmest
2000
85°F avg
Coldest
1989
52°F avg
About This Date
September 19th in San Ramon, CA typically brings pleasant fall weather, with average highs around 79°F and lows near 56°F. Over 55 years of records, the warmest September 19th was in 2000 (85°F average), while the coldest was 1989 (52°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 19th dates historically, with the wettest September 19th recording 2.21" of rain. The last decade has been 8.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 8.8°F cooler on this date compared to 20-30 years ago.
Planning for September 19th in San Ramon, CA? Great weather for outdoor activities.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 63° | 70° | — | — |
| 2024 | 74° | 52° | 63° | — | — |
| 2023 | 71° | 54° | 62° | — | — |
| 2022 | 60° | 52° | 56° | 2.21" | — |
| 2021 | 65° | 50° | 57° | 0.08" | — |
| 2020 | 64° | 53° | 59° | — | — |
| 2019 | 67° | 49° | 58° | 0.76" | — |
| 2018 | 74° | 55° | 64° | — | — |
| 2017 | 68° | 48° | 58° | — | — |
| 2016 | 91° | 73° | 82° | — | — |
| 2015 | 79° | 64° | 71° | — | — |
| 2014 | 70° | 56° | 63° | — | — |
| 2013 | 78° | 60° | 69° | — | — |
| 2012 | 78° | 61° | 69° | — | — |
| 2011 | 85° | 69° | 77° | — | — |
| 2010 | 66° | 55° | 61° | — | — |
| 2009 | 90° | 66° | 78° | — | — |
| 2008 | 68° | 45° | 56° | — | — |
| 2007 | 72° | 39° | 55° | — | — |
| 2006 | 80° | 54° | 67° | — | — |
| 2005 | 93° | 54° | 73° | — | — |
| 2004 | 63° | 52° | 57° | — | — |
| 2003 | 98° | 62° | 80° | — | — |
| 2002 | 97° | 65° | 81° | — | — |
| 2001 | 85° | 53° | 69° | — | — |
| 2000warmest | 103° | 67° | 85° | — | — |
| 1999 | 71° | 56° | 63° | — | — |
| 1998 | 84° | 54° | 69° | — | — |
| 1997 | 83° | 52° | 67° | — | — |
| 1996 | 89° | 58° | 73° | — | — |
| 1995 | 100° | 67° | 83° | — | — |
| 1994 | 89° | 58° | 73° | — | — |
| 1993 | 83° | 49° | 66° | — | — |
| 1992 | 88° | 54° | 71° | — | — |
| 1991 | 81° | 54° | 67° | — | — |
| 1990 | 84° | 54° | 69° | — | — |
| 1989coldest | 57° | 47° | 52° | 0.03" | — |
| 1988 | 81° | 61° | 71° | — | — |
| 1987 | 86° | 60° | 73° | — | — |
| 1986 | 64° | 46° | 55° | 0.05" | — |
| 1985 | 79° | 55° | 67° | — | — |
| 1984 | 92° | 65° | 78° | 0.28" | — |
| 1983 | 86° | 63° | 74° | — | — |
| 1982 | 68° | 52° | 60° | 0.13" | — |
| 1981 | 81° | 59° | 70° | — | — |
| 1980 | 68° | 51° | 60° | — | — |
| 1979 | 83° | 55° | 69° | — | — |
| 1978 | 72° | 49° | 60° | — | — |
| 1977 | 74° | 52° | 63° | 1.12" | — |
| 1976 | 85° | 49° | 67° | — | — |
| 1975 | 86° | 56° | 71° | — | — |
| 1974 | 93° | 61° | 77° | — | — |
| 1973 | 79° | 55° | 67° | — | — |
| 1972 | 73° | 48° | 61° | — | — |
| 1971 | 84° | 61° | 72° | — | — |
55 years of data from LIVERMORE CALIFORNIA