Weather on January 21
San Francisco, CA
55 Years of Data
Avg High
59°F
Avg Low
47°F
Warmest
1976
61°F avg
Coldest
2008
45°F avg
About This Date
January 21st in San Francisco, CA typically brings cool winter weather, with average highs around 59°F and lows near 47°F. Over 56 years of records, the warmest January 21st was in 1976 (61°F average), while the coldest was 2008 (45°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 38% of January 21st dates historically, with the wettest January 21st recording 1.98" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for January 21st 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 |
|---|---|---|---|---|---|
| 2026 | 58° | 49° | 53° | — | — |
| 2025 | 61° | 44° | 52° | — | — |
| 2024 | 61° | 53° | 57° | 1.37" | — |
| 2023 | 56° | 42° | 49° | — | — |
| 2022 | 67° | 49° | 58° | — | — |
| 2021 | 55° | 42° | 49° | — | — |
| 2020 | 57° | 51° | 54° | 0.46" | — |
| 2019 | 57° | 49° | 53° | — | — |
| 2018 | 57° | 45° | 51° | 0.05" | — |
| 2017 | 55° | 48° | 52° | 1.17" | — |
| 2016 | 62° | 52° | 57° | — | — |
| 2015 | 63° | 48° | 55° | — | — |
| 2014 | 66° | 49° | 57° | — | — |
| 2013 | 63° | 45° | 54° | — | — |
| 2012 | 58° | 48° | 53° | 0.33" | — |
| 2011 | 65° | 49° | 57° | — | — |
| 2010 | 51° | 43° | 47° | 1.98" | — |
| 2009 | 61° | 52° | 56° | 0.28" | — |
| 2008coldest | 48° | 43° | 45° | 1.4" | — |
| 2007 | 64° | 47° | 55° | — | — |
| 2006 | 56° | 46° | 51° | 0.61" | — |
| 2005 | 55° | 43° | 49° | — | — |
| 2004 | 64° | 46° | 55° | — | — |
| 2003 | 58° | 49° | 53° | 0.86" | — |
| 2002 | 52° | 46° | 49° | 0.51" | — |
| 2001 | 57° | 43° | 50° | — | — |
| 2000 | 60° | 49° | 54° | 0.3" | — |
| 1999 | 57° | 49° | 53° | — | — |
| 1998 | 56° | 45° | 50° | — | — |
| 1997 | 57° | 48° | 53° | 0.48" | — |
| 1996 | 57° | 47° | 52° | 0.3" | — |
| 1995 | 55° | 47° | 51° | 0.43" | — |
| 1994 | 68° | 49° | 58° | — | — |
| 1993 | 60° | 51° | 56° | 0.79" | — |
| 1992 | 55° | 40° | 47° | — | — |
| 1991 | 67° | 51° | 59° | — | — |
| 1990 | 61° | 43° | 52° | — | — |
| 1989 | 66° | 46° | 56° | — | — |
| 1988 | 65° | 44° | 54° | — | — |
| 1987 | 58° | 42° | 50° | — | — |
| 1986 | 61° | 50° | 55° | — | — |
| 1985 | 51° | 43° | 47° | — | — |
| 1984 | 53° | 46° | 50° | 0.41" | — |
| 1983 | 50° | 45° | 47° | 0.08" | — |
| 1982 | 50° | 44° | 47° | 0.36" | — |
| 1981 | 63° | 55° | 59° | — | — |
| 1980 | 61° | 46° | 53° | — | — |
| 1979 | 57° | 48° | 53° | — | — |
| 1978 | 57° | 53° | 55° | — | — |
| 1977 | 58° | 51° | 54° | — | — |
| 1976warmest | 71° | 51° | 61° | — | — |
| 1975 | 65° | 45° | 55° | — | — |
| 1974 | 56° | 48° | 52° | — | — |
| 1973 | 51° | 43° | 47° | 0.64" | — |
| 1972 | 55° | 51° | 53° | 0.13" | — |
| 1971 | 60° | 45° | 52° | — | — |
56 years of data from SAN FRANCISCO DWTN