Weather on August 20
Antioch, CA
55 Years of Data
Avg High
87°F
Avg Low
59°F
Warmest
1992
83°F avg
Coldest
2001
61°F avg
About This Date
August 20th in Antioch, CA typically brings warm summer weather, with average highs around 87°F and lows near 59°F — a 28°F daily swing. Over 55 years of records, the warmest August 20th was in 1992 (83°F average), while the coldest was 2001 (61°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 20th dates historically. The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Antioch, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 65° | 77° | — | — |
| 2024 | 83° | 64° | 73° | — | — |
| 2023 | 90° | 70° | 80° | — | — |
| 2022 | 95° | 72° | 83° | — | — |
| 2021 | 82° | 58° | 70° | — | — |
| 2020 | 93° | 70° | 81° | — | — |
| 2019 | 85° | 58° | 71° | — | — |
| 2018 | 84° | 61° | 72° | — | — |
| 2017 | 73° | 54° | 63° | — | — |
| 2016 | 91° | 58° | 74° | — | — |
| 2015 | 84° | 63° | 73° | — | — |
| 2014 | 79° | 61° | 70° | — | — |
| 2013 | 91° | 64° | 78° | — | — |
| 2012 | 85° | 69° | 77° | — | — |
| 2011 | 88° | 56° | 72° | — | — |
| 2010 | 91° | 55° | 73° | — | — |
| 2009 | 92° | 66° | 79° | — | — |
| 2008 | 87° | 66° | 77° | — | — |
| 2007 | 95° | 63° | 79° | — | — |
| 2006 | 86° | 56° | 71° | — | — |
| 2005 | 77° | 64° | 71° | — | — |
| 2004 | 88° | 59° | 73° | — | — |
| 2003 | 90° | 63° | 76° | — | — |
| 2002 | 88° | 55° | 71° | — | — |
| 2001coldest | 68° | 54° | 61° | — | — |
| 2000 | 85° | 56° | 70° | — | — |
| 1999 | 92° | 57° | 74° | — | — |
| 1998 | 81° | 56° | 68° | — | — |
| 1997 | 82° | 62° | 72° | — | — |
| 1996 | 84° | 54° | 69° | — | — |
| 1995 | 95° | 64° | 80° | — | — |
| 1994 | 92° | 58° | 75° | — | — |
| 1993 | 86° | 58° | 72° | — | — |
| 1992warmest | 104° | 62° | 83° | — | — |
| 1991 | 86° | 57° | 72° | — | — |
| 1990 | 83° | 60° | 71° | — | — |
| 1989 | 88° | 56° | 72° | — | — |
| 1988 | 98° | 57° | 78° | — | — |
| 1987 | 79° | 57° | 68° | — | — |
| 1986 | 98° | 60° | 79° | — | — |
| 1985 | 84° | 53° | 69° | — | — |
| 1984 | 94° | 52° | 73° | — | — |
| 1983 | 78° | 60° | 69° | 0.1" | — |
| 1982 | 84° | 57° | 71° | — | — |
| 1981 | 79° | 54° | 66° | — | — |
| 1980 | 84° | 55° | 70° | — | — |
| 1979 | 85° | 57° | 71° | — | — |
| 1978 | 92° | 57° | 74° | — | — |
| 1977 | 94° | 58° | 76° | — | — |
| 1976 | 80° | 59° | 70° | — | — |
| 1975 | 82° | 59° | 71° | — | — |
| 1974 | 90° | 56° | 73° | — | — |
| 1973 | 86° | 59° | 73° | — | — |
| 1972 | 79° | 61° | 70° | — | — |
| 1971 | 87° | 55° | 71° | — | — |
55 years of data from ANTIOCH FIBREBRD MILLS