Weather on September 16
San Ramon, CA
55 Years of Data
Avg High
79°F
Avg Low
55°F
Warmest
1971
91°F avg
Coldest
1977
53°F avg
About This Date
September 16th in San Ramon, CA typically brings pleasant fall weather, with average highs around 79°F and lows near 55°F. Over 55 years of records, the warmest September 16th was in 1971 (91°F average), while the coldest was 1977 (53°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 5% of September 16th dates historically, with the wettest September 16th recording 0.53" of rain. The last decade has been 4.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.2°F cooler on this date compared to 20-30 years ago.
Planning for September 16th in San Ramon, CA? Great weather for outdoor activities.
Cooling Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 53° | 70° | — | — |
| 2024 | 59° | 50° | 55° | 0.1" | — |
| 2023 | 79° | 53° | 66° | — | — |
| 2022 | 64° | 50° | 57° | — | — |
| 2021 | 82° | 58° | 70° | — | — |
| 2020 | 82° | 63° | 72° | — | — |
| 2019 | 77° | 63° | 70° | — | — |
| 2018 | 66° | 47° | 56° | — | — |
| 2017 | 72° | 48° | 60° | — | — |
| 2016 | 67° | 46° | 56° | — | — |
| 2015 | 65° | 48° | 56° | — | — |
| 2014 | 80° | 55° | 68° | — | — |
| 2013 | 75° | 55° | 65° | — | — |
| 2012 | 85° | 69° | 77° | — | — |
| 2011 | 70° | 49° | 59° | — | — |
| 2010 | 76° | 59° | 67° | — | — |
| 2009 | 78° | 55° | 67° | — | — |
| 2008 | 87° | 58° | 72° | — | — |
| 2007 | 70° | 44° | 57° | — | — |
| 2006 | 80° | 47° | 63° | — | — |
| 2005 | 72° | 51° | 61° | — | — |
| 2004 | 92° | 65° | 78° | — | — |
| 2003 | 78° | 52° | 65° | — | — |
| 2002 | 83° | 55° | 69° | — | — |
| 2001 | 64° | 54° | 59° | — | — |
| 2000 | 88° | 57° | 72° | — | — |
| 1999 | 84° | 52° | 68° | — | — |
| 1998 | 84° | 55° | 70° | — | — |
| 1997 | 84° | 54° | 69° | — | — |
| 1996 | 77° | 49° | 63° | — | — |
| 1995 | 73° | 54° | 63° | — | — |
| 1994 | 98° | 63° | 80° | — | — |
| 1993 | 69° | 52° | 60° | — | — |
| 1992 | 80° | 52° | 66° | — | — |
| 1991 | 98° | 57° | 78° | — | — |
| 1990 | 85° | 54° | 69° | — | — |
| 1989 | 89° | 59° | 74° | — | — |
| 1988 | 79° | 60° | 69° | — | — |
| 1987 | 81° | 62° | 71° | — | — |
| 1986 | 68° | 48° | 58° | 0.53" | — |
| 1985 | 77° | 46° | 62° | — | — |
| 1984 | 87° | 65° | 76° | — | — |
| 1983 | 94° | 66° | 80° | — | — |
| 1982 | 66° | 51° | 59° | 0.53" | — |
| 1981 | 84° | 59° | 72° | — | — |
| 1980 | 78° | 51° | 65° | — | — |
| 1979 | 100° | 73° | 87° | — | — |
| 1978 | 86° | 55° | 71° | — | — |
| 1977coldest | 60° | 47° | 53° | — | — |
| 1976 | 70° | 48° | 59° | — | — |
| 1975 | 85° | 46° | 65° | — | — |
| 1974 | 87° | 57° | 72° | — | — |
| 1973 | 75° | 45° | 60° | — | — |
| 1972 | 85° | 56° | 70° | — | — |
| 1971warmest | 106° | 77° | 91° | — | — |
55 years of data from LIVERMORE CALIFORNIA