Weather on August 21
Stockton, CA
55 Years of Data
Avg High
90°F
Avg Low
57°F
Warmest
2007
82°F avg
Coldest
1989
64°F avg
About This Date
August 21st in Stockton, CA typically brings hot summer weather, with average highs around 90°F and lows near 57°F — a 33°F daily swing. Over 55 years of records, the warmest August 21st was in 2007 (82°F average), while the coldest was 1989 (64°F) — a 18°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Stockton, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 104° | 60° | 82° | — | — |
| 2024 | 93° | 62° | 78° | — | — |
| 2023 | 88° | 67° | 77° | — | — |
| 2022 | 96° | 64° | 80° | — | — |
| 2021 | 81° | 55° | 68° | — | — |
| 2020 | 94° | 62° | 78° | — | — |
| 2019 | 96° | 56° | 76° | — | — |
| 2018 | 82° | 55° | 69° | — | — |
| 2017 | 89° | 62° | 76° | — | — |
| 2016 | 93° | 59° | 76° | — | — |
| 2015 | 91° | 58° | 74° | — | — |
| 2014 | 90° | 59° | 74° | — | — |
| 2013 | 90° | 61° | 75° | — | — |
| 2012 | 94° | 57° | 75° | — | — |
| 2011 | 86° | 54° | 70° | — | — |
| 2010 | 84° | 53° | 69° | — | — |
| 2009 | 100° | — | — | — | — |
| 2008 | 89° | 67° | 78° | — | — |
| 2007warmest | 96° | 68° | 82° | — | — |
| 2006 | 89° | 55° | 72° | — | — |
| 2005 | 91° | 53° | 72° | — | — |
| 2004 | 86° | 59° | 73° | — | — |
| 2003 | 97° | 61° | 79° | — | — |
| 2002 | 90° | 54° | 72° | — | — |
| 2001 | 85° | 52° | 68° | — | — |
| 2000 | 89° | 55° | 72° | — | — |
| 1999 | 94° | 57° | 75° | — | — |
| 1998 | 85° | 54° | 69° | — | — |
| 1997 | 82° | 60° | 71° | — | — |
| 1996 | 87° | 57° | 72° | — | — |
| 1995 | 99° | 62° | 80° | — | — |
| 1994 | 94° | 49° | 71° | — | — |
| 1993 | 85° | 55° | 70° | — | — |
| 1992 | 100° | 59° | 80° | — | — |
| 1991 | 89° | 52° | 70° | — | — |
| 1990 | 88° | 58° | 73° | — | — |
| 1989coldest | 83° | 45° | 64° | — | — |
| 1988 | 90° | 49° | 69° | — | — |
| 1987 | 81° | 51° | 66° | — | — |
| 1986 | 91° | 44° | 68° | — | — |
| 1985 | 87° | 52° | 69° | — | — |
| 1984 | 90° | 55° | 72° | — | — |
| 1983 | 84° | 54° | 69° | — | — |
| 1982 | 95° | 62° | 79° | — | — |
| 1981 | 86° | 51° | 69° | — | — |
| 1980 | 87° | 56° | 71° | — | — |
| 1979 | 81° | 59° | 70° | — | — |
| 1978 | 90° | 58° | 74° | — | — |
| 1977 | 89° | 56° | 72° | — | — |
| 1976 | 87° | 59° | 73° | — | — |
| 1975 | 88° | 61° | 74° | — | — |
| 1974 | 92° | 58° | 75° | — | — |
| 1973 | 95° | 56° | 75° | — | — |
| 1972 | 88° | 61° | 74° | — | — |
| 1971 | 88° | 56° | 72° | — | — |
55 years of data from STOCKTON FIRE STN 4