Weather on December 31
San Francisco, CA
55 Years of Data
Avg High
56°F
Avg Low
46°F
Warmest
1996
63°F avg
Coldest
2010
45°F avg
About This Date
December 31st in San Francisco, CA typically brings cool winter weather, with average highs around 56°F and lows near 46°F. Over 55 years of records, the warmest December 31st was in 1996 (63°F average), while the coldest was 2010 (45°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 22% of December 31st dates historically, with the wettest December 31st recording 13.87" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for December 31st in San Francisco, CA? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 53° | 49° | 51° | — | — |
| 2024 | 58° | 45° | 51° | — | — |
| 2023 | 57° | 49° | 53° | — | — |
| 2022 | 61° | 51° | 56° | 13.87" | — |
| 2021 | 53° | 42° | 48° | — | — |
| 2020 | 57° | 48° | 53° | 0.05" | — |
| 2019 | 63° | 46° | 54° | — | — |
| 2018 | 56° | 47° | 51° | — | — |
| 2017 | 59° | 48° | 54° | — | — |
| 2016 | 52° | 45° | 48° | — | — |
| 2015 | 51° | 42° | 47° | — | — |
| 2014 | 57° | 45° | 51° | — | — |
| 2013 | 59° | 46° | 53° | — | — |
| 2012 | 52° | 42° | 47° | — | — |
| 2011 | 59° | 46° | 53° | — | — |
| 2010coldest | 49° | 42° | 45° | — | — |
| 2009 | 59° | 49° | 54° | — | — |
| 2008 | 58° | 43° | 50° | — | — |
| 2007 | 56° | 41° | 48° | — | — |
| 2006 | 52° | 46° | 49° | — | — |
| 2005 | 63° | 51° | 57° | 5.38" | — |
| 2004 | 56° | 46° | 51° | 1.07" | — |
| 2003 | 54° | 46° | 50° | — | — |
| 2002 | 58° | 48° | 53° | 1.68" | — |
| 2001 | 61° | 53° | 57° | 0.08" | — |
| 2000 | 64° | 44° | 54° | — | — |
| 1999 | 53° | 45° | 49° | — | — |
| 1998 | 58° | 49° | 53° | — | — |
| 1997 | 63° | 50° | 56° | — | — |
| 1996warmest | 66° | 59° | 63° | 0.33" | — |
| 1995 | 64° | 55° | 60° | — | — |
| 1994 | 50° | 45° | 47° | 0.76" | — |
| 1993 | 58° | 47° | 52° | — | — |
| 1992 | 57° | 48° | 53° | 0.1" | — |
| 1991 | 62° | 46° | 54° | — | — |
| 1990 | 58° | 36° | 47° | — | — |
| 1989 | 56° | 47° | 51° | — | — |
| 1988 | 52° | 41° | 46° | — | — |
| 1987 | 52° | 40° | 46° | — | — |
| 1986 | 50° | 47° | 48° | 0.36" | — |
| 1985 | 59° | 52° | 55° | — | — |
| 1984 | 53° | 44° | 49° | — | — |
| 1983 | 61° | 48° | 54° | — | — |
| 1982 | 52° | 42° | 47° | — | — |
| 1981 | 52° | 48° | 50° | — | — |
| 1980 | 51° | 44° | 48° | — | — |
| 1979 | 62° | 56° | 59° | 0.05" | — |
| 1978 | 56° | 41° | 48° | — | — |
| 1977 | 55° | 47° | 51° | — | — |
| 1976 | 57° | 48° | 53° | — | — |
| 1975 | 52° | 45° | 48° | — | — |
| 1974 | 57° | 47° | 52° | — | — |
| 1973 | 51° | 44° | 48° | 0.66" | — |
| 1972 | 59° | 44° | 52° | — | — |
| 1971 | 54° | 42° | 48° | — | — |
55 years of data from SAN FRANCISCO DWTN