September weather in Concord, CA
The average temperature in Concord in September is 71.6°F (57.8°F–85.3°F). Average precipitation: 0.06 inches.
September is a fall month in Concord, and is warmer than the annual average of 62°F. Daily temperatures swing about 27.5°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
85.3°F
Avg Low
57.8°F
Precipitation
0.06 in
Daylight
12h 14m
September records in Concord
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 111.0°F (2017) | 52.0°F (2008) | 0.11 in (2000) |
| September 2 | 109.9°F (2017) | 50.0°F (2012) | 0.01 in (2000) |
| September 3 | 106.0°F (2017) | 52.0°F (1999) | 0.00 in (1999) |
| September 4 | 102.9°F (2022) | 52.0°F (1999) | 0.00 in (1999) |
| September 5 | 111.9°F (2022) | 52.0°F (1999) | 0.00 in (1999) |
| September 6 | 111.9°F (2022) | 48.9°F (2001) | 0.00 in (1999) |
| September 7 | 111.9°F (2020) | 52.0°F (2001) | 0.00 in (1999) |
| September 8 | 111.0°F (2022) | 52.0°F (2001) | 0.01 in (1999) |
| September 9 | 104.0°F (2015) | 53.1°F (2002) | 0.00 in (1999) |
| September 10 | 105.1°F (2015) | 51.1°F (2000) | 0.00 in (1999) |
| September 11 | 102.0°F (2015) | 52.0°F (2000) | 0.00 in (1999) |
| September 12 | 100.0°F (2003) | 52.0°F (2005) | 0.00 in (1999) |
| September 13 | 100.0°F (2019) | 50.0°F (2005) | 0.07 in (2009) |
| September 14 | 99.0°F (2019) | 51.1°F (2001) | 0.00 in (1999) |
| September 15 | 95.0°F (2004) | 51.1°F (2012) | 0.00 in (1999) |
| September 16 | 93.9°F (2025) | 48.9°F (2006) | 0.11 in (2019) |
| September 17 | 97.0°F (2000) | 51.1°F (2001) | 0.00 in (1999) |
| September 18 | 102.9°F (2000) | 48.9°F (2012) | 0.12 in (2022) |
| September 19 | 102.9°F (2000) | 48.0°F (2001) | 0.08 in (2004) |
| September 20 | 99.0°F (2015) | 48.0°F (2001) | 0.00 in (1999) |
| September 21 | 102.0°F (2015) | 48.9°F (2004) | 0.65 in (2013) |
| September 22 | 102.0°F (2003) | 50.0°F (2001) | 0.06 in (2000) |
| September 23 | 99.0°F (2024) | 50.0°F (2017) | 0.00 in (1999) |
| September 24 | 100.9°F (2019) | 48.0°F (2005) | 0.15 in (2001) |
| September 25 | 99.0°F (2019) | 48.0°F (2005) | 0.27 in (2014) |
| September 26 | 102.0°F (2009) | 46.9°F (2013) | 0.00 in (1999) |
| September 27 | 100.0°F (2009) | 48.0°F (2013) | 0.00 in (1999) |
| September 28 | 102.9°F (2010) | 48.9°F (2013) | 0.00 in (1999) |
| September 29 | 100.0°F (2010) | 45.0°F (2007) | 0.00 in (1999) |
| September 30 | 97.0°F (2012) | 46.0°F (2007) | 0.05 in (2015) |