Weather on July 21
Antioch, CA
55 Years of Data
Avg High
89°F
Avg Low
60°F
Warmest
2006
91°F avg
Coldest
2025
62°F avg
About This Date
July 21st in Antioch, CA typically brings warm summer weather, with average highs around 89°F and lows near 60°F — a 29°F daily swing. Over 55 years of records, the warmest July 21st was in 2006 (91°F average), while the coldest was 2025 (62°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 2% of July 21st dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for July 21st in Antioch, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025coldest | 70° | 55° | 62° | — | — |
| 2024 | 83° | 66° | 74° | — | — |
| 2023 | 99° | 76° | 87° | — | — |
| 2022 | 89° | 74° | 81° | — | — |
| 2021 | 95° | 61° | 78° | — | — |
| 2020 | 90° | 58° | 74° | — | — |
| 2019 | 89° | 58° | 73° | — | — |
| 2018 | 79° | 58° | 68° | — | — |
| 2017 | 83° | 64° | 73° | — | — |
| 2016 | 88° | 56° | 72° | — | — |
| 2015 | 92° | 65° | 78° | — | — |
| 2014 | 81° | 65° | 73° | — | — |
| 2013 | 80° | 58° | 69° | — | — |
| 2012 | 102° | 54° | 78° | — | — |
| 2011 | 94° | 66° | 80° | — | — |
| 2010 | 85° | 54° | 69° | — | — |
| 2009 | 94° | 59° | 76° | — | — |
| 2008 | 77° | 52° | 64° | — | — |
| 2007 | 90° | 64° | 77° | — | — |
| 2006warmest | 106° | 76° | 91° | — | — |
| 2005 | 90° | 60° | 75° | — | — |
| 2004 | 96° | 61° | 78° | — | — |
| 2003 | 104° | 68° | 86° | — | — |
| 2002 | 90° | 56° | 73° | — | — |
| 2001 | 70° | 57° | 63° | — | — |
| 2000 | 76° | 64° | 70° | — | — |
| 1999 | 78° | 53° | 66° | — | — |
| 1998 | 96° | 57° | 77° | — | — |
| 1997 | 92° | 58° | 75° | — | — |
| 1996 | 101° | 65° | 83° | — | — |
| 1995 | 83° | 56° | 69° | — | — |
| 1994 | 86° | 58° | 72° | — | — |
| 1993 | 88° | 60° | 74° | — | — |
| 1992 | 89° | 60° | 75° | — | — |
| 1991 | 82° | 57° | 70° | — | — |
| 1990 | 101° | 62° | 81° | — | — |
| 1989 | 98° | 62° | 80° | — | — |
| 1988 | 94° | 59° | 76° | — | — |
| 1987 | 79° | 56° | 67° | — | — |
| 1986 | 100° | 59° | 80° | — | — |
| 1985 | — | 60° | — | — | — |
| 1984 | 90° | 61° | 75° | — | — |
| 1983 | 88° | 53° | 70° | — | — |
| 1982 | 89° | 48° | 69° | — | — |
| 1981 | 94° | 53° | 73° | — | — |
| 1980 | 89° | 56° | 72° | — | — |
| 1979 | 88° | 59° | 73° | 0.08" | — |
| 1978 | 92° | 57° | 74° | — | — |
| 1977 | 95° | 54° | 74° | — | — |
| 1976 | 92° | 57° | 74° | — | — |
| 1975 | 85° | 55° | 70° | — | — |
| 1974 | 88° | 62° | 75° | — | — |
| 1973 | 78° | 58° | 68° | — | — |
| 1972 | 74° | 56° | 65° | — | — |
| 1971 | 91° | 63° | 77° | — | — |
55 years of data from ANTIOCH FIBREBRD MILLS