Weather on October 21
El Cajon, CA
55 Years of Data
Avg High
80°F
Avg Low
55°F
Warmest
2003
80°F avg
Coldest
1984
61°F avg
About This Date
October 21st in El Cajon, CA typically brings warm fall weather, with average highs around 80°F and lows near 55°F — a 25°F daily swing. Over 55 years of records, the warmest October 21st was in 2003 (80°F average), while the coldest was 1984 (61°F) — a 19°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 0.61" of rain. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in El Cajon, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 51° | 68° | — | — |
| 2024 | 86° | 51° | 69° | — | — |
| 2023 | 89° | 58° | 73° | — | — |
| 2022 | 79° | 59° | 69° | — | — |
| 2021 | 81° | 50° | 65° | — | — |
| 2020 | 78° | 61° | 69° | — | — |
| 2019 | 93° | 53° | 73° | — | — |
| 2018 | 83° | 52° | 67° | — | — |
| 2017 | 82° | 53° | 68° | — | — |
| 2016 | 94° | 54° | 74° | — | — |
| 2015 | 81° | 58° | 69° | — | — |
| 2014 | 83° | 63° | 73° | — | — |
| 2013 | 80° | 48° | 64° | — | — |
| 2012 | 72° | 62° | 67° | 0.28" | — |
| 2011 | 76° | 61° | 68° | — | — |
| 2010 | 68° | 59° | 64° | — | — |
| 2009 | 83° | 52° | 67° | — | — |
| 2008 | 83° | 51° | 67° | — | — |
| 2007 | 85° | 54° | 69° | — | — |
| 2006 | 81° | 57° | 69° | — | — |
| 2005 | 66° | 59° | 63° | — | — |
| 2004 | 67° | 57° | 62° | 0.43" | — |
| 2003warmest | 102° | 57° | 80° | — | — |
| 2002 | 76° | 53° | 64° | — | — |
| 2001 | 79° | 56° | 67° | — | — |
| 2000 | 71° | 62° | 67° | — | — |
| 1999 | 95° | 62° | 79° | — | — |
| 1998 | 78° | 52° | 65° | — | — |
| 1997 | 74° | 59° | 66° | — | — |
| 1996 | 79° | 47° | 63° | — | — |
| 1995 | 83° | 54° | 68° | — | — |
| 1994 | 76° | 48° | 62° | — | — |
| 1993 | — | 50° | — | — | — |
| 1992 | 72° | 56° | 64° | — | — |
| 1991 | 77° | — | — | — | — |
| 1990 | 87° | 47° | 67° | — | — |
| 1989 | 76° | 57° | 66° | 0.61" | — |
| 1988 | 78° | 63° | 70° | — | — |
| 1987 | 80° | 57° | 69° | — | — |
| 1986 | 82° | 48° | 65° | — | — |
| 1985 | 72° | 51° | 61° | — | — |
| 1984coldest | 71° | 50° | 61° | — | — |
| 1983 | 89° | 53° | 71° | — | — |
| 1982 | 83° | 49° | 66° | — | — |
| 1981 | 82° | 53° | 68° | — | — |
| 1980 | 90° | 47° | 68° | — | — |
| 1979 | 72° | 54° | 63° | — | — |
| 1978 | 75° | 60° | 68° | 0.08" | — |
| 1977 | 72° | 57° | 64° | — | — |
| 1976 | 74° | 63° | 68° | 0.23" | — |
| 1975 | 74° | 52° | 63° | — | — |
| 1974 | 74° | 60° | 67° | — | — |
| 1973 | 75° | 54° | 64° | — | — |
| 1972 | 73° | 52° | 62° | 0.05" | — |
| 1971 | 81° | 45° | 63° | — | — |
55 years of data from GILLESPIE FLD