Weather on March 21
El Cajon, CA
55 Years of Data
Avg High
72°F
Avg Low
49°F
Warmest
2026
74°F avg
Coldest
1991
50°F avg
About This Date
March 21st in El Cajon, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 49°F. Over 55 years of records, the warmest March 21st was in 2026 (74°F average), while the coldest was 1991 (50°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 20% of March 21st dates historically, with the wettest March 21st recording 2.92" of rain. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in El Cajon, CA? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 85° | 64° | 74° | — | — |
| 2025 | 75° | 43° | 59° | — | — |
| 2024 | 75° | 52° | 63° | — | — |
| 2023 | 61° | 51° | 56° | 2.41" | — |
| 2022 | 73° | 44° | 59° | — | — |
| 2021 | 64° | 43° | 53° | — | — |
| 2020 | 66° | 49° | 57° | — | — |
| 2019 | 63° | 48° | 55° | 0.3" | — |
| 2018 | 82° | 49° | 65° | — | — |
| 2017 | 74° | 52° | 63° | — | — |
| 2016 | 74° | 53° | 63° | — | — |
| 2015 | 78° | 53° | 66° | — | — |
| 2014 | 70° | 57° | 63° | — | — |
| 2013 | 67° | 51° | 59° | — | — |
| 2012 | 78° | 43° | 60° | — | — |
| 2011 | 59° | 49° | 54° | 2.92" | — |
| 2010 | 78° | 50° | 64° | — | — |
| 2009 | 70° | 53° | 61° | — | — |
| 2008 | 78° | 49° | 63° | — | — |
| 2007 | 60° | 49° | 54° | — | — |
| 2006 | 59° | 47° | 53° | — | — |
| 2005 | 71° | 50° | 61° | — | — |
| 2004 | 75° | 54° | 64° | — | — |
| 2003 | 77° | 46° | 62° | — | — |
| 2002 | 84° | 44° | 64° | — | — |
| 2001 | 78° | 55° | 67° | — | — |
| 2000 | 74° | 40° | 57° | — | — |
| 1999 | 69° | 40° | 54° | — | — |
| 1998 | 72° | 52° | 62° | — | — |
| 1997 | 87° | 46° | 67° | — | — |
| 1996 | 75° | 57° | 66° | — | — |
| 1995 | 65° | 54° | 59° | 1.14" | — |
| 1993 | 73° | 58° | 65° | — | — |
| 1992 | 67° | 57° | 62° | 1.14" | — |
| 1991coldest | 57° | 43° | 50° | 2.57" | — |
| 1990 | 84° | 51° | 68° | — | — |
| 1989 | 77° | 42° | 60° | — | — |
| 1988 | 79° | 44° | 61° | — | — |
| 1987 | 66° | 45° | 55° | 0.51" | — |
| 1986 | 86° | 44° | 65° | — | — |
| 1985 | 68° | 49° | 58° | — | — |
| 1984 | 76° | 46° | 61° | — | — |
| 1983 | 64° | 48° | 56° | 1.57" | — |
| 1982 | 72° | 44° | 58° | — | — |
| 1981 | 70° | 43° | 56° | — | — |
| 1980 | 71° | 48° | 60° | — | — |
| 1979 | 60° | 45° | 52° | 0.36" | — |
| 1978 | 70° | 55° | 62° | 0.05" | — |
| 1977 | 82° | 41° | 62° | — | — |
| 1976 | 84° | 41° | 63° | — | — |
| 1975 | 64° | 47° | 55° | — | — |
| 1974 | 68° | 50° | 59° | — | — |
| 1973 | 60° | 49° | 54° | 0.28" | — |
| 1972 | 79° | 53° | 66° | — | — |
| 1971 | 73° | 49° | 61° | — | — |
55 years of data from GILLESPIE FLD