Weather on August 18
Antioch, CA
55 Years of Data
Avg High
88°F
Avg Low
59°F
Warmest
2020
90°F avg
Coldest
2024
65°F avg
About This Date
August 18th in Antioch, CA typically brings warm summer weather, with average highs around 88°F and lows near 59°F — a 29°F daily swing. Over 54 years of records, the warmest August 18th was in 2020 (90°F average), while the coldest was 2024 (65°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 18th 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 August 18th 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 |
|---|---|---|---|---|---|
| 2025 | 78° | 56° | 67° | — | — |
| 2024coldest | 76° | 55° | 65° | — | — |
| 2023 | 78° | 56° | 67° | — | — |
| 2022 | 90° | 70° | 80° | — | — |
| 2021 | 84° | 62° | 73° | — | — |
| 2020warmest | 106° | 74° | 90° | — | — |
| 2019 | 81° | 57° | 69° | — | — |
| 2018 | 93° | 62° | 78° | — | — |
| 2017 | 82° | 63° | 72° | — | — |
| 2016 | 87° | 59° | 73° | — | — |
| 2015 | 93° | 60° | 77° | — | — |
| 2014 | 86° | 58° | 72° | — | — |
| 2013 | 98° | 63° | 80° | — | — |
| 2012 | 86° | 69° | 78° | — | — |
| 2011 | 91° | 60° | 76° | — | — |
| 2010 | 83° | 55° | 69° | — | — |
| 2009 | 91° | 59° | 75° | — | — |
| 2008 | 78° | 58° | 68° | — | — |
| 2007 | 88° | 58° | 73° | — | — |
| 2006 | 91° | 55° | 73° | — | — |
| 2005 | 89° | 60° | 75° | — | — |
| 2004 | 95° | 60° | 78° | — | — |
| 2003 | 94° | 60° | 77° | — | — |
| 2002 | 89° | 57° | 73° | — | — |
| 2001 | 88° | 70° | 79° | — | — |
| 2000 | 89° | 58° | 73° | — | — |
| 1999 | 81° | 55° | 68° | — | — |
| 1998 | 80° | 59° | 70° | — | — |
| 1997 | 81° | 57° | 69° | — | — |
| 1996 | 98° | 54° | 76° | — | — |
| 1995 | 81° | 62° | 71° | — | — |
| 1994 | 100° | 56° | 78° | — | — |
| 1992 | 96° | 59° | 78° | — | — |
| 1991 | 85° | 54° | 69° | — | — |
| 1990 | 83° | 66° | 74° | — | — |
| 1989 | 78° | 55° | 67° | — | — |
| 1988 | 96° | 64° | 80° | — | — |
| 1987 | 93° | 57° | 75° | — | — |
| 1986 | 85° | 54° | 69° | — | — |
| 1985 | 75° | 57° | 66° | — | — |
| 1984 | 99° | 61° | 80° | — | — |
| 1983 | 92° | 58° | 75° | — | — |
| 1982 | 93° | 54° | 73° | — | — |
| 1981 | 93° | 51° | 72° | — | — |
| 1980 | 86° | 53° | 70° | — | — |
| 1979 | 90° | 54° | 72° | — | — |
| 1978 | 88° | 62° | 75° | — | — |
| 1977 | 88° | 56° | 72° | — | — |
| 1976 | 76° | 56° | 66° | 0.43" | — |
| 1975 | 82° | 61° | 71° | 0.13" | — |
| 1974 | 85° | 58° | 71° | — | — |
| 1973 | 87° | 51° | 69° | — | — |
| 1972 | 85° | 55° | 70° | — | — |
| 1971 | 88° | 57° | 72° | — | — |
54 years of data from ANTIOCH FIBREBRD MILLS