September weather in Frankfort, SD
The average temperature in Frankfort in September is °F (°F–°F). Average precipitation: 2.59 inches.
September is a fall month in Frankfort, and is cooler than the annual average of 0°F. Expect about 8 days with precipitation. Daylight averages about 12h 18m.
Avg High
°F
Avg Low
°F
Precipitation
2.59 in
Daylight
12h 18m
September records in Frankfort
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | — | — | 0.22 in (2025) |
| September 2 | — | — | 4.86 in (2008) |
| September 3 | — | — | 0.94 in (2021) |
| September 4 | — | — | 0.02 in (2008) |
| September 5 | — | — | 0.49 in (2004) |
| September 6 | — | — | 1.18 in (2004) |
| September 7 | — | — | 0.65 in (2010) |
| September 8 | — | — | 0.61 in (2020) |
| September 9 | — | — | 0.32 in (2016) |
| September 10 | — | — | 0.29 in (2019) |
| September 11 | — | — | 1.22 in (2009) |
| September 12 | — | — | 1.80 in (2019) |
| September 13 | — | — | 0.54 in (2005) |
| September 14 | — | — | 0.69 in (2021) |
| September 15 | — | — | 0.73 in (2010) |
| September 16 | — | — | 1.73 in (2010) |
| September 17 | — | — | 0.19 in (2019) |
| September 18 | — | — | 1.49 in (2025) |
| September 19 | — | — | 2.91 in (2013) |
| September 20 | — | — | 1.16 in (2007) |
| September 21 | — | — | 0.52 in (2019) |
| September 22 | — | — | 0.74 in (2006) |
| September 23 | — | — | 0.80 in (2004) |
| September 24 | — | — | 1.69 in (2023) |
| September 25 | — | — | 0.42 in (2005) |
| September 26 | — | — | 0.43 in (2017) |
| September 27 | — | — | 0.24 in (2013) |
| September 28 | — | — | 1.04 in (2013) |
| September 29 | — | — | 0.05 in (2013) |
| September 30 | — | — | 0.13 in (2007) |