Weather on August 21
San Diego, CA
55 Years of Data
Avg High
77°F
Avg Low
67°F
Warmest
1982
81°F avg
Coldest
1999
67°F avg
About This Date
August 21st in San Diego, CA typically brings pleasant summer weather, with average highs around 77°F and lows near 67°F. Over 55 years of records, the warmest August 21st was in 1982 (81°F average), while the coldest was 1999 (67°F) — a 14°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 21st dates historically. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in San Diego, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 67° | 74° | — | — |
| 2024 | 83° | 70° | 76° | — | — |
| 2023 | 76° | 65° | 70° | 0.05" | — |
| 2022 | 75° | 68° | 72° | — | — |
| 2021 | 78° | 68° | 73° | — | — |
| 2020 | 85° | 71° | 78° | — | — |
| 2019 | 78° | 66° | 72° | — | — |
| 2018 | 81° | 72° | 76° | — | — |
| 2017 | 78° | 69° | 74° | — | — |
| 2016 | 78° | 67° | 72° | — | — |
| 2015 | 79° | 70° | 74° | — | — |
| 2014 | 78° | 70° | 74° | — | — |
| 2013 | 76° | 66° | 71° | — | — |
| 2012 | 75° | 70° | 72° | — | — |
| 2011 | 71° | 63° | 67° | — | — |
| 2010 | 75° | 64° | 70° | — | — |
| 2009 | 79° | 67° | 73° | — | — |
| 2008 | 73° | 62° | 68° | — | — |
| 2007 | 82° | 70° | 76° | — | — |
| 2006 | 75° | 69° | 72° | — | — |
| 2005 | 74° | 65° | 69° | — | — |
| 2004 | 74° | 68° | 71° | — | — |
| 2003 | 76° | 69° | 72° | — | — |
| 2002 | 73° | 67° | 70° | — | — |
| 2001 | 71° | 64° | 68° | — | — |
| 2000 | 73° | 67° | 70° | — | — |
| 1999coldest | 71° | 62° | 67° | — | — |
| 1998 | 79° | 66° | 72° | — | — |
| 1997 | 77° | 70° | 73° | — | — |
| 1996 | 78° | 66° | 72° | — | — |
| 1995 | 77° | 67° | 72° | — | — |
| 1994 | 74° | 66° | 70° | — | — |
| 1993 | 74° | 63° | 68° | — | — |
| 1992 | 79° | 71° | 75° | — | — |
| 1991 | 73° | 65° | 69° | — | — |
| 1990 | 77° | 63° | 70° | — | — |
| 1989 | 74° | 65° | 69° | — | — |
| 1988 | 74° | 65° | 69° | — | — |
| 1987 | 75° | 64° | 70° | — | — |
| 1986 | 79° | 67° | 73° | — | — |
| 1985 | 75° | 64° | 70° | — | — |
| 1984 | 80° | 75° | 78° | — | — |
| 1983 | 79° | 73° | 76° | — | — |
| 1982warmest | 89° | 73° | 81° | — | — |
| 1981 | 85° | 71° | 78° | — | — |
| 1980 | 79° | 70° | 74° | — | — |
| 1979 | 79° | 70° | 74° | — | — |
| 1978 | 78° | 69° | 74° | — | — |
| 1977 | 74° | 69° | 71° | — | — |
| 1976 | 77° | 69° | 73° | — | — |
| 1975 | 74° | 65° | 69° | — | — |
| 1974 | 73° | 64° | 69° | — | — |
| 1973 | 80° | 67° | 73° | — | — |
| 1972 | 83° | 62° | 72° | — | — |
| 1971 | 77° | 69° | 73° | — | — |
55 years of data from SAN DIEGO INTL AP