Weather on December 31
San Ramon, CA
55 Years of Data
Avg High
54°F
Avg Low
39°F
Warmest
1980
64°F avg
Coldest
1987
36°F avg
About This Date
December 31st 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 31st was in 1980 (64°F average), while the coldest was 1987 (36°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 25% of December 31st dates historically, with the wettest December 31st recording 9.25" 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 31st in San Ramon, CA? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 63° | 53° | 58° | — | — |
| 2024 | 53° | 38° | 45° | — | — |
| 2023 | 54° | 44° | 49° | 0.48" | — |
| 2022 | 54° | 51° | 52° | 9.25" | — |
| 2021 | 48° | 31° | 39° | — | — |
| 2020 | 54° | 38° | 46° | 0.66" | — |
| 2019 | 50° | 38° | 44° | — | — |
| 2018 | 53° | 38° | 45° | — | — |
| 2017 | 61° | 54° | 57° | — | — |
| 2016 | 60° | 34° | 47° | — | — |
| 2015 | 49° | 30° | 39° | 0.64" | — |
| 2014 | 48° | 29° | 38° | — | — |
| 2013 | 65° | 50° | 57° | — | — |
| 2012 | 46° | 32° | 39° | — | — |
| 2011 | 54° | 41° | 47° | 0.03" | — |
| 2010 | 44° | 30° | 37° | — | — |
| 2009 | 51° | 39° | 45° | — | — |
| 2008 | 57° | 41° | 49° | — | — |
| 2007 | 44° | 31° | 37° | — | — |
| 2006 | 55° | 38° | 46° | — | — |
| 2005 | 60° | 47° | 53° | — | — |
| 2004 | 55° | 44° | 50° | — | — |
| 2003 | 46° | 35° | 41° | — | — |
| 2002 | 45° | 37° | 41° | 1.91" | — |
| 2001 | 52° | 38° | 45° | 2.34" | — |
| 2000 | 63° | 36° | 49° | — | — |
| 1999 | 49° | 39° | 44° | — | — |
| 1998 | 59° | 46° | 53° | — | — |
| 1997 | 57° | 44° | 51° | — | — |
| 1996 | 67° | 61° | 64° | — | — |
| 1995 | 65° | 52° | 58° | — | — |
| 1994 | 46° | 37° | 42° | — | — |
| 1993 | 54° | 41° | 47° | — | — |
| 1992 | 54° | 43° | 48° | — | — |
| 1991 | 53° | 40° | 46° | — | — |
| 1990 | 52° | 30° | 41° | — | — |
| 1989 | 64° | 44° | 54° | — | — |
| 1988 | 44° | 31° | 37° | 0.86" | — |
| 1987coldest | 46° | 26° | 36° | — | — |
| 1986 | — | 41° | — | 0.03" | — |
| 1985 | 55° | 39° | 47° | — | — |
| 1984 | 52° | 33° | 42° | — | — |
| 1983 | 54° | 40° | 47° | 0.33" | — |
| 1982 | 50° | 32° | 41° | — | — |
| 1981 | 49° | 41° | 45° | 0.05" | — |
| 1980warmest | 76° | 52° | 64° | — | — |
| 1979 | 52° | 48° | 50° | 0.51" | — |
| 1978 | 46° | 38° | 42° | — | — |
| 1977 | 48° | 39° | 44° | 0.05" | — |
| 1976 | 45° | 40° | 42° | 2.13" | — |
| 1975 | 69° | 33° | 51° | — | — |
| 1974 | 47° | 30° | 38° | — | — |
| 1973 | 54° | 39° | 46° | — | — |
| 1972 | 52° | 34° | 43° | — | — |
| 1971 | 46° | 35° | 41° | — | — |
55 years of data from LIVERMORE CALIFORNIA