Weather on December 17
San Ramon, CA
55 Years of Data
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.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 48° | 58° | 0.11" | — |
| 2024 | 50° | 39° | 45° | — | — |
| 2023 | 58° | 49° | 53° | — | — |
| 2022 | 52° | 40° | 46° | — | — |
| 2021 | 47° | 33° | 40° | — | — |
| 2020 | 56° | 42° | 49° | 0.34" | — |
| 2019 | 54° | 41° | 47° | — | — |
| 2018 | 52° | 40° | 46° | 0.89" | — |
| 2017 | 67° | 43° | 55° | — | — |
| 2016 | 44° | 33° | 39° | — | — |
| 2015 | 48° | 36° | 42° | — | — |
| 2014 | 52° | 41° | 46° | 0.78" | — |
| 2013 | 68° | 55° | 62° | — | — |
| 2012 | 48° | 43° | 45° | 0.05" | — |
| 2011 | 55° | 38° | 46° | — | — |
| 2010 | 49° | 38° | 43° | 0.38" | — |
| 2009 | 60° | 44° | 52° | 0.03" | — |
| 2008coldest | 36° | 30° | 33° | 0.24" | 0.3" |
| 2007 | 48° | 35° | 42° | 0.23" | — |
| 2006 | 54° | 34° | 44° | — | — |
| 2005 | 47° | 36° | 41° | — | — |
| 2004 | 66° | 42° | 54° | — | — |
| 2003 | 57° | 35° | 46° | — | — |
| 2002 | 48° | 35° | 42° | 1.01" | — |
| 2001 | 54° | 40° | 47° | 0.4" | — |
| 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° | 0.56" | — |
| 1986 | 63° | 41° | 52° | 0.21" | — |
| 1985 | 64° | 42° | 53° | — | — |
| 1984 | 45° | 31° | 38° | — | — |
| 1983 | 58° | 44° | 51° | 0.05" | — |
| 1982 | 53° | 46° | 50° | 0.22" | — |
| 1981 | 59° | 42° | 51° | — | — |
| 1980warmest | 77° | 52° | 64° | — | — |
| 1979 | 70° | 49° | 59° | — | — |
| 1978 | 62° | 41° | 52° | 0.11" | — |
| 1977 | 53° | 39° | 46° | 1.15" | — |
| 1976 | 71° | 53° | 62° | — | — |
| 1975 | 57° | 39° | 48° | — | — |
| 1974 | 60° | 40° | 50° | — | — |
| 1973 | 64° | 46° | 55° | 0.1" | — |
| 1972 | 53° | 36° | 44° | 1.13" | — |
| 1971 | 49° | 31° | 40° | — | — |
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
Most pleasant months in San Ramon, CA: May, June, September, October.
What to expect on December 17th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
December 17th outlook →