September weather in Clarkson Valley, MO
The average temperature in Clarkson Valley in September is 68.7°F (56.5°F–80.9°F). Average precipitation: 3.02 inches.
September is a fall month in Clarkson Valley, and is warmer than the annual average of 56.1°F. Daily temperatures swing about 24.4°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
80.9°F
Avg Low
56.5°F
Precipitation
3.02 in
Daylight
12h 14m
September records in Clarkson Valley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (2011) | 48.0°F (2009) | 2.09 in (2014) |
| September 2 | 99.0°F (2011) | 46.9°F (2017) | 0.68 in (2003) |
| September 3 | 99.0°F (2011) | 51.1°F (2009) | 0.66 in (1991) |
| September 4 | 98.1°F (1990) | 50.0°F (2024) | 2.83 in (2008) |
| September 5 | 100.0°F (1990) | 48.0°F (1988) | 0.86 in (2009) |
| September 6 | 100.0°F (1990) | 43.0°F (1988) | 0.39 in (2007) |
| September 7 | 96.1°F (2002) | 43.0°F (1988) | 1.35 in (2018) |
| September 8 | 93.0°F (2002) | 39.9°F (2024) | 1.01 in (2018) |
| September 9 | 98.1°F (2013) | 41.0°F (2024) | 1.54 in (2016) |
| September 10 | 98.1°F (2013) | 43.0°F (2024) | 1.56 in (2016) |
| September 11 | 97.0°F (2000) | 45.0°F (2017) | 0.65 in (2000) |
| September 12 | 96.1°F (1991) | 46.0°F (1992) | 0.37 in (2003) |
| September 13 | 97.0°F (2025) | 43.0°F (2014) | 1.41 in (1993) |
| September 14 | 98.1°F (2025) | 42.1°F (2014) | 4.47 in (2008) |
| September 15 | 93.9°F (1991) | 39.9°F (2007) | 1.53 in (2005) |
| September 16 | 93.9°F (2019) | 43.0°F (2000) | 1.18 in (1998) |
| September 17 | 96.1°F (1988) | 41.0°F (1999) | 0.91 in (2006) |
| September 18 | 95.0°F (2025) | 45.0°F (1999) | 0.97 in (2017) |
| September 19 | 93.9°F (2000) | 39.9°F (1991) | 2.12 in (2002) |
| September 20 | 96.1°F (2017) | 39.0°F (1991) | 0.93 in (2025) |
| September 21 | 95.0°F (2022) | 36.0°F (1991) | 1.31 in (2021) |
| September 22 | 93.9°F (2005) | 36.0°F (1995) | 3.67 in (1993) |
| September 23 | 91.9°F (2007) | 32.0°F (1995) | 2.33 in (2024) |
| September 24 | 91.9°F (2017) | 32.0°F (1989) | 0.77 in (2000) |
| September 25 | 91.9°F (2017) | 34.0°F (1989) | 0.98 in (2005) |
| September 26 | 91.0°F (2017) | 37.0°F (2001) | 1.92 in (2003) |
| September 27 | 91.9°F (2019) | 39.9°F (1989) | 0.67 in (2024) |
| September 28 | 90.0°F (2021) | 37.0°F (1989) | 0.43 in (1999) |
| September 29 | 91.0°F (2019) | 36.0°F (1992) | 0.32 in (2008) |
| September 30 | 91.9°F (2019) | 35.1°F (1999) | 0.95 in (1988) |