Weather on December 1
San Ramon, CA
55 Years of Data
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" | — |
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.