Weather on August 31
Concord, CA
55 Years of Data
Avg High
88°F
Avg Low
57°F
Warmest
2025
81°F avg
Coldest
1973
61°F avg
About This Date
August 31st in Concord, CA typically brings warm summer weather, with average highs around 88°F and lows near 57°F — a 31°F daily swing. Over 55 years of records, the warmest August 31st was in 2025 (81°F average), while the coldest was 1973 (61°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 31st dates historically. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for August 31st 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 |
|---|---|---|---|---|---|
| 2025warmest | 100° | 62° | 81° | — | — |
| 2024 | 86° | 60° | 73° | — | — |
| 2023 | 83° | 60° | 71° | — | — |
| 2022 | 92° | 57° | 74° | — | — |
| 2021 | 86° | 60° | 73° | — | — |
| 2020 | 86° | 57° | 72° | — | — |
| 2019 | 97° | 61° | 79° | — | — |
| 2018 | 88° | 59° | 73° | — | — |
| 2017 | 103° | 58° | 80° | — | — |
| 2016 | 85° | 61° | 73° | — | — |
| 2015 | 91° | 64° | 78° | — | — |
| 2014 | 93° | 62° | 78° | — | — |
| 2013 | 88° | 62° | 75° | — | — |
| 2012 | 68° | 56° | 62° | — | — |
| 2011 | 82° | 56° | 69° | — | — |
| 2010 | 88° | 57° | 72° | — | — |
| 2009 | 82° | 56° | 69° | — | — |
| 2008 | 84° | 56° | 70° | — | — |
| 2007 | 96° | 64° | 80° | — | — |
| 2006 | 96° | 56° | 76° | — | — |
| 2005 | 98° | 57° | 78° | — | — |
| 2004 | 89° | 58° | 73° | — | — |
| 2003 | 89° | 54° | 71° | — | — |
| 2002 | 94° | 55° | 74° | — | — |
| 2001 | 87° | 54° | 70° | — | — |
| 2000 | 75° | 58° | 66° | — | — |
| 1999 | 81° | 53° | 67° | — | — |
| 1998 | 96° | 55° | 76° | — | — |
| 1997 | 85° | 61° | 73° | — | — |
| 1996 | 98° | 61° | 79° | — | — |
| 1995 | 89° | 54° | 71° | — | — |
| 1994 | 86° | 59° | 73° | — | — |
| 1993 | 76° | 58° | 67° | — | — |
| 1992 | 81° | 58° | 69° | — | — |
| 1991 | 85° | 53° | 69° | — | — |
| 1990 | 90° | 55° | 72° | — | — |
| 1989 | 90° | 50° | 70° | — | — |
| 1988 | 92° | 55° | 73° | — | — |
| 1987 | 89° | 53° | 71° | — | — |
| 1986 | 89° | 51° | 70° | — | — |
| 1985 | 95° | 51° | 73° | — | — |
| 1984 | 90° | 60° | 75° | 0.28" | — |
| 1983 | 80° | 56° | 68° | — | — |
| 1982 | 94° | 50° | 72° | — | — |
| 1981 | 97° | 55° | 76° | — | — |
| 1980 | 87° | 51° | 69° | — | — |
| 1979 | 84° | 56° | 70° | — | — |
| 1978 | 89° | 54° | 71° | — | — |
| 1977 | 81° | 54° | 67° | — | — |
| 1976 | 99° | 58° | 78° | — | — |
| 1975 | 89° | 52° | 70° | — | — |
| 1974 | 81° | 57° | 69° | — | — |
| 1973coldest | 72° | 51° | 61° | — | — |
| 1972 | 94° | 55° | 74° | — | — |
| 1971 | 78° | 54° | 66° | — | — |
55 years of data from CONCORD BUCHANAN FLD