September weather in Portage Des Sioux, MO
The average temperature in Portage Des Sioux in September is 69.1°F (57.1°F–81.2°F). Average precipitation: 2.97 inches.
September is a fall month in Portage Des Sioux, and is warmer than the annual average of 56.1°F. Daily temperatures swing about 24.1°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
81.2°F
Avg Low
57.1°F
Precipitation
2.97 in
Daylight
12h 14m
September records in Portage Des Sioux
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (2011) | 48.0°F (2009) | 2.74 in (2014) |
| September 2 | 99.0°F (2011) | 45.0°F (2017) | 0.97 in (2014) |
| September 3 | 100.0°F (2011) | 48.9°F (2009) | 0.05 in (2008) |
| September 4 | 96.1°F (2014) | 50.0°F (1997) | 2.47 in (2008) |
| September 5 | 96.1°F (1998) | 46.9°F (1997) | 0.76 in (2009) |
| September 6 | 97.0°F (1998) | 46.9°F (2017) | 0.74 in (2007) |
| September 7 | 93.9°F (2002) | 45.0°F (2017) | 1.01 in (2012) |
| September 8 | 93.0°F (2002) | 42.1°F (2024) | 1.68 in (2020) |
| September 9 | 98.1°F (2013) | 45.0°F (2024) | 1.16 in (2014) |
| September 10 | 98.1°F (2013) | 48.0°F (1999) | 1.36 in (2010) |
| September 11 | 95.0°F (2013) | 46.9°F (1997) | 1.05 in (2010) |
| September 12 | 96.1°F (2000) | 46.9°F (1997) | 0.36 in (2008) |
| September 13 | 96.1°F (2025) | 43.0°F (2014) | 0.26 in (2005) |
| September 14 | 97.0°F (2025) | 43.0°F (2014) | 3.31 in (2008) |
| September 15 | 93.0°F (2018) | 43.0°F (2011) | 0.58 in (2005) |
| September 16 | 93.9°F (1997) | 43.0°F (2000) | 1.19 in (2016) |
| September 17 | 93.0°F (2018) | 43.0°F (1999) | 0.69 in (1998) |
| September 18 | 93.9°F (2018) | 45.0°F (2012) | 0.98 in (2001) |
| September 19 | 93.9°F (2000) | 39.9°F (2012) | 1.77 in (2002) |
| September 20 | 98.1°F (2022) | 37.9°F (2006) | 1.89 in (2009) |
| September 21 | 95.0°F (2022) | 39.9°F (2000) | 1.02 in (2009) |
| September 22 | 96.1°F (2017) | 36.0°F (1999) | 0.64 in (2024) |
| September 23 | 93.9°F (2007) | 36.0°F (2012) | 2.33 in (2024) |
| September 24 | 93.0°F (2017) | 37.0°F (2012) | 0.60 in (2000) |
| September 25 | 93.0°F (2017) | 37.0°F (2011) | 2.04 in (2012) |
| September 26 | 91.9°F (2017) | 35.1°F (2000) | 0.90 in (2003) |
| September 27 | 93.0°F (2021) | 37.9°F (2001) | 0.40 in (2024) |
| September 28 | 91.9°F (2021) | 41.0°F (2003) | 0.80 in (2005) |
| September 29 | 90.0°F (2025) | 33.1°F (2003) | 1.91 in (2015) |
| September 30 | 91.0°F (2025) | 35.1°F (1999) | 0.07 in (2003) |