Weather on October 21
San Diego, CA
55 Years of Data
Avg High
74°F
Avg Low
61°F
Warmest
2016
76°F avg
Coldest
2008
62°F avg
About This Date
October 21st in San Diego, CA typically brings pleasant fall weather, with average highs around 74°F and lows near 61°F. Over 55 years of records, the warmest October 21st was in 2016 (76°F average), while the coldest was 2008 (62°F) — a 14°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 0.81" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in San Diego, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 57° | 65° | — | — |
| 2024 | 78° | 56° | 67° | — | — |
| 2023 | 78° | 60° | 69° | — | — |
| 2022 | 73° | 66° | 70° | — | — |
| 2021 | 72° | 54° | 63° | — | — |
| 2020 | 74° | 68° | 71° | — | — |
| 2019 | 88° | 58° | 73° | — | — |
| 2018 | 75° | 59° | 67° | — | — |
| 2017 | 74° | 61° | 67° | — | — |
| 2016warmest | 88° | 64° | 76° | — | — |
| 2015 | 77° | 66° | 72° | — | — |
| 2014 | 76° | 66° | 71° | — | — |
| 2013 | 70° | 55° | 62° | — | — |
| 2012 | 69° | 64° | 67° | 0.36" | — |
| 2011 | 69° | 61° | 65° | — | — |
| 2010 | 71° | 65° | 68° | — | — |
| 2009 | 73° | 58° | 65° | — | — |
| 2008coldest | 69° | 55° | 62° | — | — |
| 2007 | 84° | 57° | 71° | — | — |
| 2006 | 74° | 57° | 65° | — | — |
| 2005 | 65° | 62° | 63° | — | — |
| 2004 | 67° | 59° | 63° | 0.18" | — |
| 2003 | 83° | 63° | 73° | — | — |
| 2002 | 66° | 61° | 63° | — | — |
| 2001 | 68° | 63° | 65° | — | — |
| 2000 | 67° | 62° | 64° | 0.03" | — |
| 1999 | 87° | 61° | 74° | — | — |
| 1998 | 69° | 61° | 65° | — | — |
| 1997 | 71° | 64° | 68° | — | — |
| 1996 | 79° | 56° | 67° | — | — |
| 1995 | 69° | 63° | 66° | — | — |
| 1994 | 71° | 56° | 63° | — | — |
| 1993 | 84° | 56° | 70° | — | — |
| 1992 | 72° | 66° | 69° | — | — |
| 1991 | 72° | 64° | 68° | — | — |
| 1990 | 80° | 54° | 67° | — | — |
| 1989 | 71° | 60° | 66° | 0.25" | — |
| 1988 | 69° | 63° | 66° | — | — |
| 1987 | 75° | 61° | 68° | — | — |
| 1986 | 79° | 55° | 67° | — | — |
| 1985 | 69° | 61° | 65° | 0.36" | — |
| 1984 | 71° | 59° | 65° | — | — |
| 1983 | 75° | 63° | 69° | — | — |
| 1982 | 78° | 60° | 69° | — | — |
| 1981 | 72° | 63° | 67° | — | — |
| 1980 | 85° | 58° | 71° | — | — |
| 1979 | 71° | 61° | 66° | — | — |
| 1978 | 71° | 68° | 70° | — | — |
| 1977 | 71° | 60° | 66° | — | — |
| 1976 | 75° | 68° | 72° | 0.81" | — |
| 1975 | 72° | 64° | 68° | — | — |
| 1974 | 70° | 60° | 65° | — | — |
| 1973 | 70° | 60° | 65° | — | — |
| 1972 | 70° | 56° | 63° | — | — |
| 1971 | 75° | 57° | 66° | — | — |
55 years of data from SAN DIEGO INTL AP