Weather on September 1
Concord, CA
55 Years of Data
Avg High
89°F
Avg Low
57°F
Warmest
2017
90°F avg
Coldest
2000
62°F avg
About This Date
September 1st in Concord, CA typically brings warm fall weather, with average highs around 89°F and lows near 57°F — a 32°F daily swing. Over 55 years of records, the warmest September 1st was in 2017 (90°F average), while the coldest was 2000 (62°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 1st dates historically. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for September 1st in Concord, 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 | 100° | 62° | 81° | — | — |
| 2024 | 84° | 59° | 72° | — | — |
| 2023 | 74° | 61° | 67° | — | — |
| 2022 | 100° | 58° | 79° | — | — |
| 2021 | 73° | 58° | 65° | — | — |
| 2020 | 78° | 58° | 68° | — | — |
| 2019 | 96° | 64° | 80° | — | — |
| 2018 | 88° | 59° | 73° | — | — |
| 2017warmest | 111° | 69° | 90° | — | — |
| 2016 | 80° | 60° | 70° | — | — |
| 2015 | 86° | 62° | 74° | — | — |
| 2014 | 97° | 59° | 78° | — | — |
| 2013 | 86° | 61° | 73° | — | — |
| 2012 | 77° | 55° | 66° | — | — |
| 2011 | 89° | 54° | 71° | — | — |
| 2010 | 97° | 57° | 77° | — | — |
| 2009 | 90° | 59° | 74° | — | — |
| 2008 | 90° | 52° | 71° | — | — |
| 2007 | 99° | 59° | 79° | — | — |
| 2006 | 88° | 56° | 72° | — | — |
| 2005 | 89° | 57° | 73° | — | — |
| 2004 | 88° | 61° | 74° | — | — |
| 2003 | 98° | 56° | 77° | — | — |
| 2002 | 100° | 57° | 79° | — | — |
| 2001 | 88° | 55° | 71° | — | — |
| 2000coldest | 64° | 59° | 62° | 0.28" | — |
| 1999 | 81° | 54° | 67° | — | — |
| 1998 | 98° | 60° | 79° | — | — |
| 1997 | 86° | 62° | 74° | — | — |
| 1996 | 89° | 58° | 73° | — | — |
| 1995 | 89° | 56° | 72° | — | — |
| 1994 | 80° | 58° | 69° | — | — |
| 1993 | 92° | 59° | 75° | — | — |
| 1992 | 80° | 60° | 70° | — | — |
| 1991 | 90° | 61° | 75° | — | — |
| 1990 | 82° | 54° | 68° | — | — |
| 1989 | 90° | 52° | 71° | — | — |
| 1988 | 90° | 52° | 71° | — | — |
| 1987 | 88° | 53° | 70° | — | — |
| 1986 | 91° | 53° | 72° | — | — |
| 1985 | 88° | 54° | 71° | — | — |
| 1984 | 97° | 56° | 76° | — | — |
| 1983 | 84° | 52° | 68° | — | — |
| 1982 | 92° | 55° | 73° | — | — |
| 1981 | 94° | 54° | 74° | — | — |
| 1980 | 90° | 58° | 74° | — | — |
| 1979 | 81° | 62° | 71° | — | — |
| 1978 | 95° | 58° | 76° | — | — |
| 1977 | 80° | 51° | 66° | — | — |
| 1976 | 100° | 56° | 78° | — | — |
| 1975 | 86° | 53° | 70° | — | — |
| 1974 | 84° | 55° | 70° | — | — |
| 1973 | 90° | 46° | 68° | — | — |
| 1972 | 89° | 54° | 71° | — | — |
| 1971 | 83° | 52° | 67° | — | — |
55 years of data from CONCORD BUCHANAN FLD