Weather on December 17
San Ramon, CA
55 Years of Data
Avg High
56°F
Avg Low
40°F
Warmest
1980
64°F avg
Coldest
2008
33°F avg
About This Date
December 17th in San Ramon, CA typically brings cool winter weather, with average highs around 56°F and lows near 40°F. Over 55 years of records, the warmest December 17th was in 1980 (64°F average), while the coldest was 2008 (33°F) — a 31°F range across recorded history. Precipitation has occurred on 35% of recorded December 17th dates, with snow falling 2% of the time. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in San Ramon, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 48° | 58° | 0.28" | — |
| 2024 | 50° | 39° | 45° | — | — |
| 2023 | 58° | 49° | 53° | — | — |
| 2022 | 52° | 40° | 46° | — | — |
| 2021 | 47° | 33° | 40° | — | — |
| 2020 | 56° | 42° | 49° | 0.86" | — |
| 2019 | 54° | 41° | 47° | — | — |
| 2018 | 52° | 40° | 46° | 2.26" | — |
| 2017 | 67° | 43° | 55° | — | — |
| 2016 | 44° | 33° | 39° | — | — |
| 2015 | 48° | 36° | 42° | — | — |
| 2014 | 52° | 41° | 46° | 1.98" | — |
| 2013 | 68° | 55° | 62° | — | — |
| 2012 | 48° | 43° | 45° | 0.13" | — |
| 2011 | 55° | 38° | 46° | — | — |
| 2010 | 49° | 38° | 43° | 0.97" | — |
| 2009 | 60° | 44° | 52° | 0.08" | — |
| 2008coldest | 36° | 30° | 33° | 0.61" | 0.3" |
| 2007 | 48° | 35° | 42° | 0.58" | — |
| 2006 | 54° | 34° | 44° | — | — |
| 2005 | 47° | 36° | 41° | — | — |
| 2004 | 66° | 42° | 54° | — | — |
| 2003 | 57° | 35° | 46° | — | — |
| 2002 | 48° | 35° | 42° | 2.57" | — |
| 2001 | 54° | 40° | 47° | 1.02" | — |
| 2000 | 62° | 41° | 52° | — | — |
| 1999 | 66° | 40° | 53° | — | — |
| 1998 | 70° | 49° | 59° | — | — |
| 1997 | 64° | 46° | 55° | — | — |
| 1996 | 53° | 51° | 52° | — | — |
| 1995 | 57° | 41° | 49° | — | — |
| 1994 | 44° | 40° | 42° | — | — |
| 1993 | 45° | 37° | 41° | — | — |
| 1992 | 50° | 36° | 43° | — | — |
| 1991 | 55° | 34° | 44° | — | — |
| 1990 | 58° | 36° | 47° | — | — |
| 1989 | 61° | 40° | 50° | — | — |
| 1988 | 59° | 35° | 47° | — | — |
| 1987 | 44° | 35° | 40° | 1.42" | — |
| 1986 | 63° | 41° | 52° | 0.53" | — |
| 1985 | 64° | 42° | 53° | — | — |
| 1984 | 45° | 31° | 38° | — | — |
| 1983 | 58° | 44° | 51° | 0.13" | — |
| 1982 | 53° | 46° | 50° | 0.56" | — |
| 1981 | 59° | 42° | 51° | — | — |
| 1980warmest | 77° | 52° | 64° | — | — |
| 1979 | 70° | 49° | 59° | — | — |
| 1978 | 62° | 41° | 52° | 0.28" | — |
| 1977 | 53° | 39° | 46° | 2.92" | — |
| 1976 | 71° | 53° | 62° | — | — |
| 1975 | 57° | 39° | 48° | — | — |
| 1974 | 60° | 40° | 50° | — | — |
| 1973 | 64° | 46° | 55° | 0.25" | — |
| 1972 | 53° | 36° | 44° | 2.87" | — |
| 1971 | 49° | 31° | 40° | — | — |
55 years of data from LIVERMORE CALIFORNIA