September weather in Clarksville, MO
The average temperature in Clarksville in September is 68.8°F (58.2°F–79.3°F). Average precipitation: 3.21 inches.
September is a fall month in Clarksville, and is warmer than the annual average of 54.4°F. Daily temperatures swing about 21.1°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
79.3°F
Avg Low
58.2°F
Precipitation
3.21 in
Daylight
12h 15m
September records in Clarksville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (2011) | 48.0°F (1993) | 2.08 in (2012) |
| September 2 | 102.0°F (2011) | 50.0°F (1993) | 1.25 in (2014) |
| September 3 | 97.0°F (2011) | 53.1°F (1993) | 1.70 in (1993) |
| September 4 | 98.1°F (2011) | 52.0°F (1997) | 1.35 in (2008) |
| September 5 | 93.9°F (2015) | 51.1°F (1997) | 1.74 in (2008) |
| September 6 | 96.1°F (1998) | 50.0°F (1997) | 0.72 in (2009) |
| September 7 | 95.0°F (1998) | 48.0°F (2025) | 0.85 in (1995) |
| September 8 | 93.9°F (2013) | 48.0°F (2000) | 1.10 in (2018) |
| September 9 | 91.0°F (2005) | 48.0°F (2024) | 1.47 in (2013) |
| September 10 | 97.0°F (2013) | 48.0°F (2024) | 1.85 in (2016) |
| September 11 | 96.1°F (2013) | 50.0°F (1993) | 1.97 in (2010) |
| September 12 | 93.9°F (2004) | 51.1°F (1992) | 3.56 in (2020) |
| September 13 | 93.9°F (2004) | 44.1°F (2014) | 0.61 in (2008) |
| September 14 | 91.0°F (2005) | 44.1°F (2014) | 3.90 in (1993) |
| September 15 | 97.0°F (2025) | 44.1°F (1993) | 1.12 in (1993) |
| September 16 | 91.0°F (2019) | 44.1°F (2011) | 0.50 in (2005) |
| September 17 | 93.9°F (1997) | 37.9°F (1999) | 1.35 in (1997) |
| September 18 | 90.0°F (2007) | 43.0°F (1999) | 0.70 in (1949) |
| September 19 | 91.0°F (2007) | 43.0°F (2012) | 3.59 in (2010) |
| September 20 | 91.9°F (2022) | 44.1°F (2012) | 0.94 in (2005) |
| September 21 | 97.0°F (2022) | 41.0°F (2000) | 1.42 in (1951) |
| September 22 | 90.0°F (2007) | 34.0°F (2000) | 1.36 in (2025) |
| September 23 | 93.0°F (2005) | 39.0°F (1995) | 3.74 in (1993) |
| September 24 | 91.0°F (2017) | 37.9°F (1995) | 2.15 in (2024) |
| September 25 | 91.9°F (2004) | 39.0°F (1995) | 0.80 in (2000) |
| September 26 | 91.9°F (2004) | 35.1°F (2000) | 0.40 in (1951) |
| September 27 | 90.0°F (2017) | 39.0°F (1995) | 0.41 in (1992) |
| September 28 | 91.0°F (2019) | 39.0°F (1995) | 0.60 in (2020) |
| September 29 | 87.1°F (2025) | 43.0°F (1992) | 1.82 in (1999) |
| September 30 | 89.1°F (2019) | 39.9°F (1999) | 1.00 in (2008) |