September weather in Boonville, MO
The average temperature in Boonville in September is 68.2°F (56.9°F–79.5°F). Average precipitation: 3.94 inches.
September is a fall month in Boonville, and is warmer than the annual average of 54.6°F. Daily temperatures swing about 22.6°F between overnight low and afternoon high. Daylight averages about 12h 14m. For travel, September is one of the best months of the year to visit.
Avg High
79.5°F
Avg Low
56.9°F
Precipitation
3.94 in
Daylight
12h 14m
September records in Boonville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2011) | 55.9°F (2017) | 3.41 in (2012) |
| September 2 | 97.0°F (2011) | 50.0°F (2017) | 0.55 in (2010) |
| September 3 | 96.1°F (2011) | 50.0°F (2017) | 0.55 in (2022) |
| September 4 | 96.1°F (2023) | 48.9°F (2010) | 1.10 in (2011) |
| September 5 | 97.0°F (2023) | 50.0°F (2010) | 0.28 in (2021) |
| September 6 | 93.0°F (2015) | 48.0°F (2011) | 1.41 in (2018) |
| September 7 | 93.9°F (2015) | 45.0°F (2017) | 0.08 in (2018) |
| September 8 | 95.0°F (2013) | 45.0°F (2017) | 1.57 in (2018) |
| September 9 | 93.9°F (2013) | 46.0°F (2011) | 1.29 in (2020) |
| September 10 | 97.0°F (2013) | 48.9°F (2024) | 1.27 in (2016) |
| September 11 | 96.1°F (2013) | 50.0°F (2012) | 1.96 in (2010) |
| September 12 | 95.0°F (2013) | 48.9°F (2017) | 0.34 in (2020) |
| September 13 | 96.1°F (2025) | 39.9°F (2014) | 0.06 in (2013) |
| September 14 | 96.1°F (2025) | 39.9°F (2014) | 0.51 in (2010) |
| September 15 | 93.9°F (2025) | 41.0°F (2011) | 0.11 in (2011) |
| September 16 | 91.0°F (2025) | 41.0°F (2011) | 0.80 in (2013) |
| September 17 | 91.9°F (2019) | 51.1°F (2011) | 0.21 in (2016) |
| September 18 | 93.0°F (2025) | 46.9°F (2012) | 0.63 in (2011) |
| September 19 | 91.0°F (2018) | 46.0°F (2012) | 0.78 in (2017) |
| September 20 | 95.0°F (2022) | 48.0°F (2015) | 0.46 in (2013) |
| September 21 | 96.1°F (2022) | 46.9°F (2015) | 1.93 in (2021) |
| September 22 | 91.0°F (2017) | 45.0°F (2013) | 1.54 in (2024) |
| September 23 | 91.0°F (2017) | 36.0°F (2012) | 0.54 in (2024) |
| September 24 | 91.0°F (2017) | 36.0°F (2012) | 1.02 in (2024) |
| September 25 | 89.1°F (2016) | 39.0°F (2011) | 0.06 in (2025) |
| September 26 | 90.0°F (2023) | 39.0°F (2011) | 1.79 in (2012) |
| September 27 | 88.0°F (2023) | 43.0°F (2010) | 0.06 in (2023) |
| September 28 | 90.0°F (2019) | 43.0°F (2010) | 0.68 in (2019) |
| September 29 | 89.1°F (2021) | 37.0°F (2022) | 1.60 in (2019) |
| September 30 | 93.9°F (2023) | 44.1°F (2022) | 0.03 in (2018) |