Weather on March 21
El Cajon, CA
55 Years of Data
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 (73°F average), while the coldest was 1991 (50°F) — a 23°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 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in El Cajon, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 89° | 58° | 73° | — | — |
| 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° | — | — |
El Cajon, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
El Cajon, CA Monthly Precipitation
Average rainfall per month, in inches.
El Cajon, 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 El Cajon, CA
El Cajon, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.