September weather in Pierpont, SD
The average temperature in Pierpont in September is 61.4°F (50.3°F–72.5°F). Average precipitation: 2.47 inches.
September is a fall month in Pierpont, and is warmer than the annual average of 44.2°F. Daily temperatures swing about 22.2°F between overnight low and afternoon high. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
72.5°F
Avg Low
50.3°F
Precipitation
2.47 in
Daylight
12h 18m
September records in Pierpont
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (2013) | 37.9°F (2009) | 0.13 in (2014) |
| September 2 | 93.9°F (2022) | 42.1°F (2009) | 2.58 in (2008) |
| September 3 | 93.9°F (2007) | 37.9°F (2008) | 0.69 in (2021) |
| September 4 | 95.0°F (2007) | 39.0°F (2025) | 0.02 in (2008) |
| September 5 | 97.0°F (2023) | 39.9°F (2006) | 0.23 in (2016) |
| September 6 | 91.9°F (2005) | 36.0°F (2025) | 0.18 in (2023) |
| September 7 | 88.0°F (2013) | 39.0°F (2025) | 0.81 in (2010) |
| September 8 | 90.0°F (2013) | 36.0°F (2008) | 0.54 in (2009) |
| September 9 | 86.0°F (2022) | 34.0°F (2020) | 0.83 in (2023) |
| September 10 | 91.9°F (2005) | 37.0°F (2020) | 1.30 in (2019) |
| September 11 | 93.0°F (2012) | 37.0°F (2015) | 0.84 in (2009) |
| September 12 | 89.1°F (2018) | 37.0°F (2014) | 2.12 in (2019) |
| September 13 | 91.0°F (2017) | 37.9°F (2014) | 0.34 in (2008) |
| September 14 | 91.9°F (2017) | 35.1°F (2007) | 0.61 in (2021) |
| September 15 | 88.0°F (2022) | 35.1°F (2011) | 1.16 in (2010) |
| September 16 | 93.0°F (2018) | 42.1°F (2010) | 0.61 in (2016) |
| September 17 | 91.9°F (2018) | 37.0°F (2012) | 0.08 in (2019) |
| September 18 | 84.9°F (2019) | 33.1°F (2012) | 1.48 in (2025) |
| September 19 | 91.0°F (2013) | 39.9°F (2006) | 0.46 in (2025) |
| September 20 | 87.1°F (2023) | 28.0°F (2006) | 1.24 in (2007) |
| September 21 | 84.9°F (2005) | 37.9°F (2013) | 1.90 in (2009) |
| September 22 | 88.0°F (2015) | 24.1°F (2012) | 0.49 in (2009) |
| September 23 | 90.0°F (2017) | 39.0°F (2011) | 0.39 in (2017) |
| September 24 | 89.1°F (2007) | 35.1°F (2006) | 1.85 in (2017) |
| September 25 | 81.0°F (2014) | 34.0°F (2012) | 0.40 in (2018) |
| September 26 | 86.0°F (2014) | 35.1°F (2018) | 0.39 in (2017) |
| September 27 | 87.1°F (2021) | 37.0°F (2016) | 0.13 in (2006) |
| September 28 | 84.0°F (2014) | 28.0°F (2006) | 0.08 in (2005) |
| September 29 | 89.1°F (2021) | 30.9°F (2018) | 0.23 in (2023) |
| September 30 | 90.0°F (2025) | 33.1°F (2011) | 0.10 in (2007) |