Weather on May 21
El Cajon, CA
55 Years of Data
Avg High
76°F
Avg Low
56°F
Warmest
2001
75°F avg
Coldest
1975
56°F avg
About This Date
May 21st in El Cajon, CA typically brings pleasant spring weather, with average highs around 76°F and lows near 56°F. Over 55 years of records, the warmest May 21st was in 2001 (75°F average), while the coldest was 1975 (56°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 4% of May 21st dates historically. The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in El Cajon, CA? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 55° | 71° | — | — |
| 2024 | 73° | 54° | 63° | — | — |
| 2023 | 78° | 61° | 69° | — | — |
| 2022 | 67° | 58° | 62° | — | — |
| 2021 | 66° | 55° | 61° | — | — |
| 2020 | 82° | 52° | 67° | — | — |
| 2019 | 65° | 55° | 60° | — | — |
| 2018 | 67° | 56° | 61° | 0.08" | — |
| 2017 | 88° | 58° | 73° | — | — |
| 2016 | 68° | 57° | 63° | — | — |
| 2015 | 66° | 58° | 62° | — | — |
| 2014 | 72° | 54° | 63° | — | — |
| 2013 | 79° | 61° | 70° | — | — |
| 2012 | 86° | 56° | 71° | — | — |
| 2011 | 79° | 58° | 68° | — | — |
| 2010 | 85° | 54° | 69° | — | — |
| 2009 | 75° | 58° | 66° | — | — |
| 2008 | 75° | 53° | 64° | — | — |
| 2007 | 61° | 58° | 59° | — | — |
| 2006 | 81° | 58° | 69° | — | — |
| 2005 | 93° | 55° | 74° | — | — |
| 2004 | 71° | 59° | 65° | — | — |
| 2003 | 91° | 58° | 74° | — | — |
| 2002 | 69° | 52° | 60° | — | — |
| 2001warmest | 90° | 60° | 75° | — | — |
| 2000 | 85° | 58° | 71° | — | — |
| 1999 | 67° | 56° | 61° | — | — |
| 1998 | 75° | 57° | 66° | — | — |
| 1997 | 84° | 63° | 73° | — | — |
| 1996 | 82° | 59° | 71° | — | — |
| 1995 | 70° | 54° | 62° | — | — |
| 1994 | 77° | 50° | 64° | — | — |
| 1993 | 76° | 60° | 68° | — | — |
| 1992 | 74° | 60° | 67° | 0.03" | — |
| 1991 | 68° | 54° | 61° | — | — |
| 1990 | 78° | 56° | 67° | — | — |
| 1989 | 86° | 53° | 70° | — | — |
| 1988 | 81° | 60° | 70° | — | — |
| 1987 | 70° | 53° | 61° | — | — |
| 1986 | 75° | 59° | 67° | — | — |
| 1985 | 78° | 58° | 68° | — | — |
| 1984 | 80° | 58° | 69° | — | — |
| 1983 | 84° | 58° | 71° | — | — |
| 1982 | 72° | 60° | 66° | — | — |
| 1981 | 76° | 46° | 61° | — | — |
| 1980 | 72° | 56° | 64° | — | — |
| 1979 | 78° | 58° | 68° | — | — |
| 1978 | 78° | 58° | 68° | — | — |
| 1977 | 80° | 50° | 65° | — | — |
| 1976 | 76° | 55° | 65° | — | — |
| 1975coldest | 67° | 46° | 56° | — | — |
| 1974 | 85° | 46° | 65° | — | — |
| 1973 | 74° | 57° | 65° | — | — |
| 1972 | 71° | 46° | 59° | — | — |
| 1971 | 67° | 50° | 58° | — | — |
55 years of data from GILLESPIE FLD