Weather on October 21
San Francisco, CA
55 Years of Data
Avg High
68°F
Avg Low
54°F
Warmest
2006
70°F avg
Coldest
2001
53°F avg
About This Date
October 21st in San Francisco, CA typically brings mild fall weather, with average highs around 68°F and lows near 54°F. Over 55 years of records, the warmest October 21st was in 2006 (70°F average), while the coldest was 2001 (53°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 11% of October 21st dates historically, with the wettest October 21st recording 1.6" of rain. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in San Francisco, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 58° | 63° | — | — |
| 2024 | 63° | 53° | 58° | — | — |
| 2023 | 68° | 55° | 62° | — | — |
| 2022 | 59° | 53° | 56° | — | — |
| 2021 | 67° | 60° | 63° | 1.6" | — |
| 2020 | 75° | 57° | 66° | — | — |
| 2019 | 77° | 56° | 66° | — | — |
| 2018 | 60° | 52° | 56° | — | — |
| 2017 | 65° | 51° | 58° | — | — |
| 2016 | 71° | 56° | 63° | — | — |
| 2015 | 77° | 57° | 67° | — | — |
| 2014 | 67° | 55° | 61° | — | — |
| 2013 | 57° | 49° | 53° | — | — |
| 2012 | 60° | 51° | 56° | 0.08" | — |
| 2011 | 70° | 53° | 61° | — | — |
| 2010 | 65° | 57° | 61° | — | — |
| 2009 | 69° | 54° | 61° | — | — |
| 2008 | 77° | 53° | 65° | — | — |
| 2007 | 71° | 55° | 63° | — | — |
| 2006warmest | 82° | 58° | 70° | — | — |
| 2005 | 65° | 51° | 58° | — | — |
| 2004 | 64° | 50° | 57° | — | — |
| 2003 | 73° | 53° | 63° | — | — |
| 2002 | 60° | 50° | 55° | — | — |
| 2001coldest | 56° | 51° | 53° | — | — |
| 2000 | 65° | 52° | 58° | — | — |
| 1999 | 82° | 56° | 69° | — | — |
| 1998 | 81° | 52° | 66° | — | — |
| 1997 | 64° | 53° | 59° | — | — |
| 1996 | 72° | 52° | 62° | — | — |
| 1995 | 72° | 55° | 63° | — | — |
| 1994 | 78° | 51° | 65° | — | — |
| 1993 | 69° | 55° | 62° | — | — |
| 1992 | 70° | 57° | 63° | — | — |
| 1991 | 67° | 59° | 63° | — | — |
| 1990 | 79° | 52° | 65° | — | — |
| 1989 | 63° | 58° | 60° | 0.2" | — |
| 1988 | 61° | 53° | 57° | — | — |
| 1987 | 71° | 54° | 62° | — | — |
| 1986 | 72° | 54° | 63° | — | — |
| 1985 | 62° | 54° | 58° | 0.08" | — |
| 1984 | 66° | 51° | 59° | — | — |
| 1983 | 72° | 52° | 62° | — | — |
| 1982 | 72° | 60° | 66° | 0.05" | — |
| 1981 | 61° | 52° | 56° | — | — |
| 1980 | 70° | 50° | 60° | — | — |
| 1979 | 68° | 54° | 61° | — | — |
| 1978 | 65° | 55° | 60° | — | — |
| 1977 | 67° | 53° | 60° | — | — |
| 1976 | 63° | 55° | 59° | — | — |
| 1975 | 64° | 54° | 59° | — | — |
| 1974 | 75° | 55° | 65° | — | — |
| 1973 | 69° | 60° | 65° | 0.08" | — |
| 1972 | 65° | 56° | 60° | — | — |
| 1971 | 68° | 52° | 60° | — | — |
55 years of data from SAN FRANCISCO DWTN