Weather on December 18
San Francisco, CA
55 Years of Data
About This Date
December 18th in San Francisco, CA typically brings cool winter weather, with average highs around 58°F and lows near 47°F. Over 55 years of records, the warmest December 18th was in 1976 (57°F average), while the coldest was 2016 (46°F) — a 11°F range across recorded history. Rain or other precipitation has occurred on about 33% of December 18th dates historically, with the wettest December 18th recording 5.46" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for December 18th in San Francisco, CA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 58° | 48° | 53° | — | — |
| 2024 | 57° | 46° | 52° | — | — |
| 2023 | 62° | 50° | 56° | 3.56" | — |
| 2022 | 53° | 43° | 48° | — | — |
| 2021 | 52° | 42° | 47° | — | — |
| 2020 | 61° | 45° | 53° | — | — |
| 2019 | 54° | 48° | 51° | 2.18" | — |
| 2018 | 62° | 50° | 56° | — | — |
| 2017 | 60° | 48° | 54° | — | — |
| 2016coldest | 52° | 40° | 46° | — | — |
| 2015 | 58° | 48° | 53° | 0.81" | — |
| 2014 | 60° | 50° | 55° | 0.1" | — |
| 2013 | 56° | 48° | 52° | — | — |
| 2012 | 52° | 44° | 48° | — | — |
| 2011 | 52° | 47° | 49° | — | — |
| 2010 | 59° | 54° | 56° | 0.71" | — |
| 2009 | 60° | 50° | 55° | — | — |
| 2008 | 54° | 40° | 47° | — | — |
| 2007 | 56° | 49° | 52° | 2.01" | — |
| 2006 | 57° | 40° | 48° | — | — |
| 2005 | 64° | 49° | 56° | 5.46" | — |
| 2004 | 65° | 46° | 55° | — | — |
| 2003 | 63° | 48° | 55° | — | — |
| 2002 | 56° | 43° | 49° | 0.1" | — |
| 2001 | 60° | 43° | 51° | — | — |
| 2000 | 61° | 50° | 55° | — | — |
| 1999 | 60° | 46° | 53° | — | — |
| 1998 | 65° | 48° | 56° | — | — |
| 1997 | 64° | 49° | 56° | — | — |
| 1996 | 63° | 48° | 55° | — | — |
| 1995 | 52° | 48° | 50° | 0.43" | — |
| 1994 | 60° | 47° | 53° | 0.15" | — |
| 1993 | 54° | 44° | 49° | — | — |
| 1992 | 55° | 40° | 47° | — | — |
| 1991 | 61° | 49° | 55° | 0.23" | — |
| 1990 | 58° | 44° | 51° | 0.08" | — |
| 1989 | 55° | 46° | 51° | — | — |
| 1988 | 58° | 47° | 52° | — | — |
| 1987 | 56° | 43° | 49° | — | — |
| 1986 | 61° | 51° | 56° | 1.14" | — |
| 1985 | 62° | 45° | 53° | — | — |
| 1984 | 50° | 45° | 47° | 0.08" | — |
| 1983 | 54° | 49° | 51° | — | — |
| 1982 | 55° | 47° | 51° | — | — |
| 1981 | 57° | 51° | 54° | 0.76" | — |
| 1980 | 57° | 52° | 54° | — | — |
| 1979 | 57° | 50° | 54° | 0.08" | — |
| 1978 | 49° | 45° | 47° | — | — |
| 1977 | 56° | 47° | 51° | 0.03" | — |
| 1976warmest | 67° | 48° | 57° | — | — |
| 1975 | 63° | 47° | 55° | — | — |
| 1974 | 56° | 46° | 51° | — | — |
| 1973 | 62° | 47° | 54° | — | — |
| 1972 | 59° | 47° | 53° | 1.32" | — |
| 1971 | 55° | 45° | 50° | — | — |