Weather on March 21
San Diego, CA
55 Years of Data
Avg High
67°F
Avg Low
54°F
Warmest
2026
69°F avg
Coldest
1991
53°F avg
About This Date
March 21st in San Diego, CA typically brings mild spring weather, with average highs around 67°F and lows near 54°F. Over 56 years of records, the warmest March 21st was in 2026 (69°F average), while the coldest was 1991 (53°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 23% of March 21st dates historically, with the wettest March 21st recording 2.69" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in San Diego, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 78° | 59° | 69° | — | — |
| 2025 | 70° | 49° | 59° | — | — |
| 2024 | 69° | 57° | 63° | — | — |
| 2023 | 64° | 54° | 59° | 2.69" | — |
| 2022 | 67° | 52° | 59° | — | — |
| 2021 | 64° | 50° | 57° | — | — |
| 2020 | 67° | 54° | 60° | — | — |
| 2019 | 63° | 54° | 58° | 0.58" | — |
| 2018 | 74° | 56° | 65° | — | — |
| 2017 | 72° | 57° | 64° | — | — |
| 2016 | 68° | 60° | 64° | — | — |
| 2015 | 70° | 62° | 66° | — | — |
| 2014 | 67° | 62° | 64° | — | — |
| 2013 | 65° | 57° | 61° | — | — |
| 2012 | 68° | 49° | 58° | — | — |
| 2011 | 62° | 53° | 58° | 0.33" | — |
| 2010 | 73° | 52° | 62° | — | — |
| 2009 | 64° | 57° | 61° | — | — |
| 2008 | 67° | 49° | 58° | — | — |
| 2007 | 60° | 53° | 57° | 0.15" | — |
| 2006 | 60° | 52° | 56° | 0.81" | — |
| 2005 | 66° | 57° | 62° | — | — |
| 2004 | 64° | 58° | 61° | — | — |
| 2003 | 65° | 53° | 59° | — | — |
| 2002 | 68° | 53° | 61° | — | — |
| 2001 | 62° | 55° | 59° | — | — |
| 2000 | 67° | 49° | 58° | — | — |
| 1999 | 65° | 50° | 57° | — | — |
| 1998 | 66° | 56° | 61° | — | — |
| 1997 | 68° | 54° | 61° | — | — |
| 1996 | 65° | 58° | 61° | — | — |
| 1995 | 61° | 53° | 57° | 1.27" | — |
| 1994 | 65° | 55° | 60° | — | — |
| 1993 | 67° | 59° | 63° | — | — |
| 1992 | 65° | 57° | 61° | 0.36" | — |
| 1991coldest | 59° | 47° | 53° | 1.24" | — |
| 1990 | 79° | 54° | 66° | — | — |
| 1989 | 82° | 50° | 66° | — | — |
| 1988 | 71° | 52° | 61° | — | — |
| 1987 | 61° | 52° | 56° | 0.81" | — |
| 1986 | 80° | 53° | 67° | — | — |
| 1985 | 64° | 58° | 61° | — | — |
| 1984 | 67° | 60° | 63° | — | — |
| 1983 | 63° | 57° | 60° | 1.04" | — |
| 1982 | 70° | 48° | 59° | — | — |
| 1981 | 67° | 53° | 60° | — | — |
| 1980 | 64° | 54° | 59° | 0.2" | — |
| 1979 | 62° | 54° | 58° | 0.94" | — |
| 1978 | 70° | 61° | 65° | — | — |
| 1977 | 74° | 51° | 62° | — | — |
| 1976 | 79° | 54° | 66° | — | — |
| 1975 | 63° | 55° | 59° | — | — |
| 1974 | 66° | 55° | 61° | — | — |
| 1973 | 62° | 52° | 57° | 0.03" | — |
| 1972 | 67° | 56° | 61° | — | — |
| 1971 | 64° | 53° | 59° | — | — |
56 years of data from SAN DIEGO INTL AP