Weather on September 19
San Ramon, CA
55 Years of Data
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.
| 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° | — | — |
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.