Weather on December 1
San Ramon, CA
55 Years of Data
Avg High
59°F
Avg Low
42°F
Warmest
2021
64°F avg
Coldest
2007
38°F avg
About This Date
December 1st in San Ramon, CA typically brings cool winter weather, with average highs around 59°F and lows near 42°F. Over 55 years of records, the warmest December 1st was in 2021 (64°F average), while the coldest was 2007 (38°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 20% of December 1st dates historically, with the wettest December 1st recording 4.17" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for December 1st in San Ramon, CA? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 55° | 35° | 45° | — | — |
| 2024 | 59° | 43° | 51° | — | — |
| 2023 | 57° | 40° | 48° | — | — |
| 2022 | 51° | 39° | 45° | 1.4" | — |
| 2021warmest | 71° | 57° | 64° | — | — |
| 2020 | 62° | 47° | 54° | — | — |
| 2019 | 56° | 40° | 48° | — | — |
| 2018 | 51° | 38° | 44° | 1.83" | — |
| 2017 | 61° | 46° | 53° | — | — |
| 2016 | 51° | 40° | 45° | — | — |
| 2015 | 52° | 33° | 42° | — | — |
| 2014 | 55° | 48° | 52° | 1.78" | — |
| 2013 | 67° | 56° | 61° | — | — |
| 2012 | 53° | 49° | 51° | 3.4" | — |
| 2011 | 57° | 42° | 50° | — | — |
| 2010 | 50° | 41° | 46° | — | — |
| 2009 | 60° | 45° | 52° | — | — |
| 2008 | 65° | 48° | 56° | — | — |
| 2007coldest | 51° | 25° | 38° | — | — |
| 2006 | 64° | 37° | 51° | — | — |
| 2005 | 60° | 48° | 54° | — | — |
| 2004 | 59° | 35° | 47° | — | — |
| 2003 | 69° | 47° | 58° | — | — |
| 2002 | 67° | 43° | 55° | — | — |
| 2001 | 51° | 29° | 40° | 0.76" | — |
| 2000 | 58° | 40° | 49° | — | — |
| 1999 | 58° | 43° | 50° | — | — |
| 1998 | 62° | 48° | 55° | — | — |
| 1997 | 64° | 42° | 53° | — | — |
| 1996 | 57° | 42° | 50° | — | — |
| 1995 | 67° | 50° | 58° | — | — |
| 1994 | 63° | 41° | 52° | — | — |
| 1993 | 62° | 40° | 51° | — | — |
| 1992 | 63° | 43° | 53° | — | — |
| 1991 | 56° | 36° | 46° | — | — |
| 1990 | 65° | 40° | 52° | — | — |
| 1989 | 64° | 42° | 53° | — | — |
| 1988 | 68° | 57° | 63° | — | — |
| 1987 | 50° | 45° | 47° | 0.89" | — |
| 1986 | 62° | 40° | 51° | — | — |
| 1985 | 50° | 36° | 43° | — | — |
| 1984 | 56° | 38° | 47° | — | — |
| 1983 | 53° | 44° | 49° | — | — |
| 1982 | 47° | 37° | 42° | 0.13" | — |
| 1981 | 58° | 40° | 49° | — | — |
| 1980 | 54° | 36° | 45° | 0.08" | — |
| 1979 | 65° | 49° | 57° | — | — |
| 1978 | 65° | 43° | 54° | 0.2" | — |
| 1977 | 70° | 56° | 63° | — | — |
| 1976 | 67° | 47° | 57° | — | — |
| 1975 | 56° | 37° | 46° | — | — |
| 1974 | 65° | 42° | 53° | — | — |
| 1973 | 56° | 38° | 47° | 4.17" | — |
| 1972 | 68° | 28° | 48° | — | — |
| 1971 | 50° | 34° | 42° | 1.09" | — |
55 years of data from LIVERMORE CALIFORNIA