Weather on September 28
San Ramon, CA
55 Years of Data
Avg High
80°F
Avg Low
57°F
Warmest
2010
85°F avg
Coldest
1985
53°F avg
About This Date
September 28th in San Ramon, CA typically brings warm fall weather, with average highs around 80°F and lows near 57°F. Over 55 years of records, the warmest September 28th was in 2010 (85°F average), while the coldest was 1985 (53°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 28th dates historically. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
Planning for September 28th in San Ramon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 56° | 64° | — | — |
| 2024 | 90° | 64° | 77° | — | — |
| 2023 | 73° | 53° | 63° | — | — |
| 2022 | 77° | 62° | 70° | — | — |
| 2021 | 67° | 48° | 57° | — | — |
| 2020 | 85° | 69° | 77° | — | — |
| 2019 | 64° | 44° | 54° | — | — |
| 2018 | 90° | 66° | 78° | — | — |
| 2017 | 85° | 65° | 75° | — | — |
| 2016 | 90° | 71° | 80° | — | — |
| 2015 | 86° | 68° | 77° | — | — |
| 2014 | 72° | 51° | 61° | — | — |
| 2013 | 72° | 57° | 64° | — | — |
| 2012 | 87° | 67° | 77° | — | — |
| 2011 | 83° | 68° | 75° | — | — |
| 2010warmest | 94° | 77° | 85° | — | — |
| 2009 | 93° | 60° | 77° | — | — |
| 2008 | 91° | 58° | 74° | — | — |
| 2007 | 82° | 41° | 62° | — | — |
| 2006 | 80° | 51° | 66° | — | — |
| 2005 | 93° | 55° | 74° | — | — |
| 2004 | 73° | 54° | 63° | — | — |
| 2003 | 71° | 56° | 63° | — | — |
| 2002 | 70° | 55° | 62° | — | — |
| 2001 | 77° | 50° | 64° | — | — |
| 2000 | 64° | 52° | 58° | — | — |
| 1999 | 88° | 70° | 79° | — | — |
| 1998 | 73° | 56° | 64° | — | — |
| 1997 | 90° | 68° | 79° | — | — |
| 1996 | 88° | 52° | 70° | — | — |
| 1995 | 71° | 54° | 62° | — | — |
| 1994 | 76° | 57° | 66° | — | — |
| 1993 | 95° | 62° | 79° | — | — |
| 1992 | 98° | 62° | 80° | — | — |
| 1991 | 90° | 52° | 71° | — | — |
| 1990 | 86° | 56° | 71° | — | — |
| 1989 | 73° | 50° | 62° | — | — |
| 1988 | 79° | 54° | 66° | — | — |
| 1987 | 88° | 64° | 76° | — | — |
| 1986 | 61° | 45° | 53° | — | — |
| 1985coldest | 63° | 44° | 53° | — | — |
| 1984 | 89° | 62° | 76° | — | — |
| 1983 | 68° | 51° | 60° | — | — |
| 1982 | 72° | 51° | 61° | — | — |
| 1981 | 68° | 53° | 61° | — | — |
| 1980 | 88° | 45° | 66° | — | — |
| 1979 | 80° | 57° | 69° | — | — |
| 1978 | 83° | 58° | 70° | — | — |
| 1977 | 78° | 56° | 67° | — | — |
| 1976 | 74° | 52° | 63° | 0.2" | — |
| 1975 | 89° | 65° | 77° | — | — |
| 1974 | 90° | 48° | 69° | — | — |
| 1973 | 93° | 48° | 71° | — | — |
| 1972 | 67° | 60° | 63° | 0.05" | — |
| 1971 | 69° | 44° | 57° | — | — |
55 years of data from LIVERMORE CALIFORNIA