Weather on December 9
San Ramon, CA
55 Years of Data
Avg High
58°F
Avg Low
42°F
Warmest
1975
63°F avg
Coldest
1972
25°F avg
About This Date
December 9th in San Ramon, CA typically brings cool winter weather, with average highs around 58°F and lows near 42°F. Over 55 years of records, the warmest December 9th was in 1975 (63°F average), while the coldest was 1972 (25°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 18% of December 9th dates historically, with the wettest December 9th recording 3.28" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 9th in San Ramon, CA? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 54° | 60° | — | — |
| 2024 | 67° | 44° | 55° | — | — |
| 2023 | 53° | 36° | 44° | — | — |
| 2022 | 46° | 36° | 41° | 0.2" | — |
| 2021 | 51° | 40° | 45° | 0.1" | — |
| 2020 | 67° | 53° | 60° | — | — |
| 2019 | 57° | 46° | 52° | — | — |
| 2018 | 56° | 46° | 51° | — | — |
| 2017 | 62° | 51° | 57° | — | — |
| 2016 | 48° | 35° | 42° | 3.28" | — |
| 2015 | 59° | 49° | 54° | — | — |
| 2014 | 64° | 53° | 59° | — | — |
| 2013 | 37° | 28° | 33° | — | — |
| 2012 | 59° | 44° | 52° | — | — |
| 2011 | 57° | 42° | 50° | — | — |
| 2010 | 52° | 48° | 50° | 1.73" | — |
| 2009 | 39° | 24° | 32° | 0.15" | — |
| 2008 | 48° | 39° | 44° | — | — |
| 2007 | 48° | 30° | 39° | — | — |
| 2006 | 59° | 50° | 55° | — | — |
| 2005 | 66° | 41° | 54° | — | — |
| 2004 | 67° | 52° | 59° | — | — |
| 2003 | 53° | 44° | 49° | — | — |
| 2002 | 54° | 43° | 48° | — | — |
| 2001 | 66° | 30° | 48° | 0.48" | — |
| 2000 | 55° | 46° | 51° | — | — |
| 1999 | 54° | 42° | 48° | — | — |
| 1998 | 53° | 40° | 46° | — | — |
| 1997 | 57° | 36° | 46° | — | — |
| 1996 | 62° | 54° | 58° | — | — |
| 1995 | 57° | 48° | 53° | — | — |
| 1994 | 52° | 31° | 41° | — | — |
| 1993 | 62° | 51° | 57° | — | — |
| 1992 | 60° | 54° | 57° | — | — |
| 1991 | 68° | 42° | 55° | — | — |
| 1990 | 65° | 45° | 55° | — | — |
| 1989 | 70° | 46° | 58° | — | — |
| 1988 | 73° | 45° | 59° | — | — |
| 1987 | 52° | 42° | 47° | 0.23" | — |
| 1986 | 62° | 37° | 50° | 0.03" | — |
| 1985 | 51° | 35° | 43° | — | — |
| 1984 | 59° | 47° | 53° | — | — |
| 1983 | 56° | 42° | 49° | 0.84" | — |
| 1982 | 55° | 40° | 47° | — | — |
| 1981 | 69° | 49° | 59° | — | — |
| 1980 | 48° | 30° | 39° | — | — |
| 1979 | 73° | 47° | 60° | — | — |
| 1978 | 49° | 28° | 38° | — | — |
| 1977 | 59° | 39° | 49° | — | — |
| 1976 | 66° | 40° | 53° | — | — |
| 1975warmest | 73° | 53° | 63° | — | — |
| 1974 | 59° | 45° | 52° | — | — |
| 1973 | 62° | 38° | 50° | — | — |
| 1972coldest | 33° | 18° | 25° | — | — |
| 1971 | 56° | 33° | 44° | 0.13" | — |
55 years of data from LIVERMORE CALIFORNIA