Weather on December 27
San Ramon, CA
55 Years of Data
Avg High
55°F
Avg Low
39°F
Warmest
1980
64°F avg
Coldest
2007
33°F avg
About This Date
December 27th in San Ramon, CA typically brings cool winter weather, with average highs around 55°F and lows near 39°F. Over 55 years of records, the warmest December 27th was in 1980 (64°F average), while the coldest was 2007 (33°F) — a 31°F range across recorded history. Precipitation has occurred on 27% of recorded December 27th dates, with snow falling 2% of the time (heaviest snowfall: 1.5"). The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for December 27th in San Ramon, CA? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 49° | 40° | 44° | 0.08" | — |
| 2024 | 54° | 45° | 49° | 0.99" | — |
| 2023 | 54° | 44° | 49° | — | — |
| 2022 | 63° | 46° | 54° | 4.65" | — |
| 2021 | 39° | 32° | 36° | 1.52" | — |
| 2020 | 50° | 40° | 45° | — | — |
| 2019 | 49° | 39° | 44° | — | — |
| 2018 | 55° | 40° | 47° | — | — |
| 2017 | 62° | 44° | 53° | — | — |
| 2016 | 48° | 35° | 42° | — | — |
| 2015 | 50° | 28° | 39° | — | — |
| 2014 | 47° | 34° | 40° | — | — |
| 2013 | 69° | 49° | 59° | — | — |
| 2012 | 46° | 34° | 40° | — | — |
| 2011 | 62° | 38° | 50° | — | — |
| 2010 | 50° | 39° | 45° | 0.15" | — |
| 2009 | 60° | 41° | 51° | 1.35" | — |
| 2008 | 47° | 33° | 40° | — | — |
| 2007coldest | 42° | 25° | 33° | — | — |
| 2006 | 53° | 46° | 50° | — | — |
| 2005 | 61° | 51° | 56° | — | — |
| 2004 | 56° | 44° | 50° | — | — |
| 2003 | 47° | 26° | 36° | — | — |
| 2002 | 50° | 43° | 46° | 0.36" | — |
| 2001 | 57° | 40° | 48° | — | — |
| 2000 | 63° | 39° | 51° | — | — |
| 1999 | 64° | 42° | 53° | — | — |
| 1998 | 56° | 35° | 45° | — | — |
| 1997 | 56° | 31° | 43° | — | — |
| 1996 | 61° | 48° | 54° | — | — |
| 1995 | 64° | 43° | 53° | — | — |
| 1994 | 54° | 40° | 47° | — | — |
| 1993 | 57° | 39° | 48° | — | — |
| 1992 | 50° | 30° | 40° | — | — |
| 1991 | 62° | 48° | 55° | — | — |
| 1990 | 58° | 34° | 46° | — | — |
| 1989 | 70° | 44° | 57° | — | — |
| 1988 | 44° | 23° | 34° | 0.03" | 1.5" |
| 1987 | 48° | 35° | 42° | 0.03" | — |
| 1986 | 55° | 38° | 46° | — | — |
| 1985 | 70° | 45° | 57° | — | — |
| 1984 | 50° | 30° | 40° | 0.46" | — |
| 1983 | 51° | 43° | 47° | 0.74" | — |
| 1982 | 51° | 41° | 46° | — | — |
| 1981 | 52° | 39° | 45° | 0.33" | — |
| 1980warmest | 77° | 52° | 64° | — | — |
| 1979 | 51° | 34° | 42° | — | — |
| 1978 | 64° | 41° | 53° | — | — |
| 1977 | 55° | 46° | 51° | 0.58" | — |
| 1976 | 68° | 44° | 56° | — | — |
| 1975 | 64° | 47° | 55° | — | — |
| 1974 | 55° | 29° | 42° | — | — |
| 1973 | 52° | 46° | 49° | 1.4" | — |
| 1972 | 68° | 45° | 56° | — | — |
| 1971 | 42° | 34° | 38° | 0.99" | — |
55 years of data from LIVERMORE CALIFORNIA