Weather on August 18
Concord, CA
55 Years of Data
Avg High
86°F
Avg Low
57°F
Warmest
2020
88°F avg
Coldest
1976
64°F avg
About This Date
August 18th in Concord, CA typically brings warm summer weather, with average highs around 86°F and lows near 57°F — a 29°F daily swing. Over 55 years of records, the warmest August 18th was in 2020 (88°F average), while the coldest was 1976 (64°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 18th 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 18th in Concord, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 58° | 71° | — | — |
| 2024 | 83° | 60° | 71° | — | — |
| 2023 | 83° | 63° | 73° | — | — |
| 2022 | 94° | 60° | 77° | — | — |
| 2021 | 84° | 58° | 71° | — | — |
| 2020warmest | 106° | 71° | 88° | — | — |
| 2019 | 85° | 58° | 71° | — | — |
| 2018 | 99° | 56° | 77° | — | — |
| 2017 | 89° | 61° | 75° | — | — |
| 2016 | 90° | 58° | 74° | — | — |
| 2015 | 88° | 61° | 74° | — | — |
| 2014 | 85° | 59° | 72° | — | — |
| 2013 | 97° | 58° | 77° | — | — |
| 2012 | 92° | 59° | 75° | — | — |
| 2011 | 89° | 57° | 73° | — | — |
| 2010 | 82° | 57° | 70° | — | — |
| 2009 | 88° | 56° | 72° | — | — |
| 2008 | 72° | 59° | 65° | — | — |
| 2007 | 84° | 59° | 72° | — | — |
| 2006 | 88° | 56° | 72° | — | — |
| 2005 | 74° | 58° | 66° | — | — |
| 2004 | 97° | 60° | 78° | — | — |
| 2003 | 90° | 60° | 75° | — | — |
| 2002 | 86° | 54° | 70° | — | — |
| 2001 | 94° | 58° | 76° | — | — |
| 2000 | 87° | 58° | 72° | — | — |
| 1999 | 74° | 56° | 65° | — | — |
| 1998 | 75° | 57° | 66° | — | — |
| 1997 | 82° | 60° | 71° | — | — |
| 1996 | 84° | 55° | 70° | — | — |
| 1995 | 90° | 56° | 73° | — | — |
| 1994 | 86° | 57° | 72° | — | — |
| 1993 | 89° | 59° | 74° | — | — |
| 1992 | 93° | 56° | 74° | — | — |
| 1991 | 82° | 53° | 68° | — | — |
| 1990 | 81° | 61° | 71° | — | — |
| 1989 | 80° | 55° | 68° | — | — |
| 1988 | 94° | 57° | 75° | — | — |
| 1987 | 78° | 50° | 64° | — | — |
| 1986 | 96° | 51° | 74° | — | — |
| 1985 | 83° | 57° | 70° | — | — |
| 1984 | 99° | 66° | 82° | — | — |
| 1983 | 80° | 57° | 69° | — | — |
| 1982 | 90° | 54° | 72° | — | — |
| 1981 | 74° | 59° | 66° | — | — |
| 1980 | 75° | 54° | 64° | — | — |
| 1979 | 84° | 55° | 70° | — | — |
| 1978 | 97° | 53° | 75° | — | — |
| 1977 | 86° | 54° | 70° | — | — |
| 1976coldest | 70° | 58° | 64° | 0.25" | — |
| 1975 | 80° | 60° | 70° | 0.1" | — |
| 1974 | 86° | 56° | 71° | — | — |
| 1973 | 91° | 45° | 68° | — | — |
| 1972 | 84° | 55° | 70° | — | — |
| 1971 | 91° | 48° | 70° | — | — |
55 years of data from CONCORD BUCHANAN FLD