Weather on October 21
San Francisco, CA
55 Years of Data
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° | — | — |
San Francisco, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
San Francisco, CA Monthly Precipitation
Average rainfall per month, in inches.
San Francisco, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit San Francisco, CA
Most pleasant months in San Francisco, CA: July, August.