Weather on December 13
San Ramon, CA
55 Years of Data
Avg High
54°F
Avg Low
39°F
Warmest
2025
65°F avg
Coldest
2003
-32°F avg
About This Date
December 13th in San Ramon, CA typically brings cool winter weather, with average highs around 54°F and lows near 39°F. Over 55 years of records, the warmest December 13th was in 2025 (65°F average), while the coldest was 2003 (-32°F) — a 97°F range across recorded history. Rain or other precipitation has occurred on about 24% of December 13th dates historically, with the wettest December 13th recording 4.34" of rain. The last decade has been 8.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.4°F warmer on this date compared to 20-30 years ago.
Planning for December 13th in San Ramon, CA? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 70° | 60° | 65° | — | — |
| 2024 | 51° | 45° | 48° | 0.89" | — |
| 2023 | 61° | 39° | 50° | — | — |
| 2022 | 47° | 35° | 41° | 0.81" | — |
| 2021 | 47° | 42° | 44° | 4.34" | — |
| 2020 | 48° | 40° | 44° | 1.5" | — |
| 2019 | 55° | 41° | 48° | — | — |
| 2018 | 56° | 46° | 51° | — | — |
| 2017 | 63° | 49° | 56° | — | — |
| 2016 | 52° | 43° | 47° | — | — |
| 2015 | 51° | 43° | 47° | 0.43" | — |
| 2014 | 50° | 38° | 44° | 0.41" | — |
| 2013 | 61° | 42° | 51° | — | — |
| 2012 | 46° | 34° | 40° | — | — |
| 2011 | 47° | 38° | 42° | — | — |
| 2010 | 70° | 42° | 56° | — | — |
| 2009 | 47° | 42° | 44° | 3.56" | — |
| 2008 | 59° | 33° | 46° | — | — |
| 2007 | 52° | 29° | 40° | — | — |
| 2006 | 63° | 52° | 57° | — | — |
| 2005 | 58° | 41° | 49° | — | — |
| 2004 | 64° | 47° | 55° | — | — |
| 2003coldest | -32° | -32° | -32° | — | — |
| 2002 | 59° | 46° | 53° | 1.52" | — |
| 2001 | 54° | 30° | 42° | — | — |
| 2000 | 55° | 43° | 49° | — | — |
| 1999 | 54° | 40° | 47° | — | — |
| 1998 | 62° | 41° | 52° | — | — |
| 1997 | 47° | 37° | 42° | — | — |
| 1996 | 56° | 51° | 53° | — | — |
| 1995 | 59° | 46° | 53° | — | — |
| 1994 | 52° | 38° | 45° | — | — |
| 1993 | 59° | 40° | 49° | — | — |
| 1992 | 54° | 46° | 50° | — | — |
| 1991 | 59° | 32° | 46° | — | — |
| 1990 | 56° | 39° | 47° | — | — |
| 1989 | 57° | 37° | 47° | — | — |
| 1988 | 69° | 43° | 56° | — | — |
| 1987 | 48° | 30° | 39° | — | — |
| 1986 | 58° | 44° | 51° | 0.08" | — |
| 1985 | 49° | 29° | 39° | — | — |
| 1984 | 53° | 37° | 45° | — | — |
| 1983 | 50° | 41° | 46° | — | — |
| 1982 | 58° | 39° | 48° | — | — |
| 1981 | 50° | 44° | 47° | 0.38" | — |
| 1980 | 66° | 45° | 55° | — | — |
| 1979 | 58° | 41° | 49° | — | — |
| 1978 | 56° | 44° | 50° | — | — |
| 1977 | 61° | 46° | 53° | — | — |
| 1976 | 67° | 47° | 57° | — | — |
| 1975 | 48° | 33° | 41° | — | — |
| 1974 | 51° | 39° | 45° | — | — |
| 1973 | 58° | 39° | 48° | 0.99" | — |
| 1972 | 35° | 32° | 34° | 3.3" | — |
| 1971 | 42° | 31° | 36° | 0.56" | — |
55 years of data from LIVERMORE CALIFORNIA