Weather on April 21
San Diego, CA
55 Years of Data
Avg High
69°F
Avg Low
57°F
Warmest
1987
71°F avg
Coldest
2001
55°F avg
About This Date
April 21st in San Diego, CA typically brings mild spring weather, with average highs around 69°F and lows near 57°F. Over 55 years of records, the warmest April 21st was in 1987 (71°F average), while the coldest was 2001 (55°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 15% of April 21st dates historically, with the wettest April 21st recording 3.38" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in San Diego, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 55° | 61° | — | — |
| 2024 | 68° | 60° | 64° | — | — |
| 2023 | 82° | 54° | 68° | — | — |
| 2022 | 67° | 52° | 59° | — | — |
| 2021 | 64° | 59° | 62° | — | — |
| 2020 | 70° | 62° | 66° | — | — |
| 2019 | 64° | 59° | 62° | — | — |
| 2018 | 73° | 55° | 64° | — | — |
| 2017 | 78° | 59° | 69° | — | — |
| 2016 | 76° | 60° | 68° | — | — |
| 2015 | 70° | 61° | 65° | — | — |
| 2014 | 70° | 61° | 65° | — | — |
| 2013 | 65° | 56° | 60° | — | — |
| 2012 | 66° | 58° | 62° | — | — |
| 2011 | 71° | 62° | 67° | — | — |
| 2010 | 59° | 52° | 55° | 0.69" | — |
| 2009 | 80° | 63° | 71° | — | — |
| 2008 | 62° | 54° | 58° | — | — |
| 2007 | 62° | 50° | 56° | — | — |
| 2006 | 68° | 61° | 64° | — | — |
| 2005 | 68° | 54° | 61° | — | — |
| 2004 | 68° | 62° | 65° | — | — |
| 2003 | 63° | 56° | 59° | — | — |
| 2002 | 66° | 51° | 59° | — | — |
| 2001coldest | 59° | 51° | 55° | 0.48" | — |
| 2000 | 63° | 57° | 60° | 0.03" | — |
| 1999 | 61° | 58° | 59° | — | — |
| 1998 | 70° | 58° | 64° | — | — |
| 1997 | 69° | 61° | 65° | — | — |
| 1996 | 67° | 56° | 61° | — | — |
| 1995 | 64° | 53° | 59° | — | — |
| 1994 | 67° | 57° | 62° | — | — |
| 1993 | 80° | 58° | 69° | — | — |
| 1992 | 72° | 59° | 65° | — | — |
| 1991 | 66° | 56° | 61° | — | — |
| 1990 | 66° | 59° | 63° | — | — |
| 1989 | 69° | 61° | 65° | — | — |
| 1988 | 64° | 51° | 58° | 3.38" | — |
| 1987warmest | 87° | 55° | 71° | — | — |
| 1986 | 77° | 58° | 67° | — | — |
| 1985 | 65° | 57° | 61° | 0.18" | — |
| 1984 | 77° | 54° | 65° | — | — |
| 1983 | 66° | 60° | 63° | 0.25" | — |
| 1982 | 81° | 59° | 70° | — | — |
| 1981 | 70° | 57° | 63° | — | — |
| 1980 | 65° | 58° | 61° | 0.15" | — |
| 1979 | 72° | 55° | 63° | — | — |
| 1978 | 66° | 59° | 63° | — | — |
| 1977 | 72° | 52° | 62° | — | — |
| 1976 | 65° | 58° | 61° | — | — |
| 1975 | 65° | 58° | 61° | — | — |
| 1974 | 71° | 54° | 62° | — | — |
| 1973 | 72° | 51° | 61° | — | — |
| 1972 | 69° | 52° | 60° | — | — |
| 1971 | 61° | 51° | 56° | 0.03" | — |
55 years of data from SAN DIEGO INTL AP