September weather in Clark, SD
The average temperature in Clark in September is 60.6°F (49.1°F–72.0°F). Average precipitation: 2.54 inches.
September is a fall month in Clark, and is warmer than the annual average of 43°F. Daily temperatures swing about 22.9°F between overnight low and afternoon high. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
72.0°F
Avg Low
49.1°F
Precipitation
2.54 in
Daylight
12h 18m
September records in Clark
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (2022) | 50.0°F (2020) | 0.03 in (2014) |
| September 2 | 93.9°F (2022) | 50.0°F (2013) | 0.43 in (2021) |
| September 3 | 91.0°F (2023) | 46.9°F (2013) | 1.20 in (2021) |
| September 4 | 100.0°F (2023) | 43.0°F (2025) | 0.00 in (2012) |
| September 5 | 99.0°F (2023) | 44.1°F (2025) | 1.28 in (2016) |
| September 6 | 84.0°F (2013) | 39.9°F (2025) | 0.12 in (2023) |
| September 7 | 89.1°F (2022) | 41.0°F (2025) | 0.03 in (2019) |
| September 8 | 90.0°F (2022) | 41.0°F (2020) | 1.12 in (2019) |
| September 9 | 89.1°F (2022) | 37.9°F (2020) | 0.15 in (2016) |
| September 10 | 84.0°F (2024) | 37.0°F (2020) | 0.66 in (2019) |
| September 11 | 89.1°F (2012) | 37.0°F (2020) | 0.40 in (2019) |
| September 12 | 88.0°F (2024) | 39.9°F (2014) | 1.60 in (2019) |
| September 13 | 86.0°F (2018) | 32.0°F (2014) | 0.12 in (2019) |
| September 14 | 88.0°F (2017) | 37.9°F (2014) | 0.80 in (2021) |
| September 15 | 90.0°F (2022) | 37.9°F (2014) | 0.40 in (2013) |
| September 16 | 93.0°F (2018) | 37.0°F (2014) | 0.76 in (2016) |
| September 17 | 90.0°F (2018) | 37.0°F (2014) | 0.74 in (2019) |
| September 18 | 86.0°F (2019) | 33.1°F (2012) | 0.98 in (2018) |
| September 19 | 87.1°F (2013) | 34.0°F (2012) | 1.55 in (2013) |
| September 20 | 91.0°F (2023) | 39.0°F (2015) | 1.98 in (2017) |
| September 21 | 86.0°F (2022) | 39.9°F (2012) | 0.39 in (2018) |
| September 22 | 82.9°F (2015) | 30.0°F (2012) | 0.01 in (2023) |
| September 23 | 84.9°F (2017) | 26.1°F (2012) | 0.95 in (2023) |
| September 24 | 81.0°F (2013) | 30.9°F (2012) | 2.36 in (2017) |
| September 25 | 79.0°F (2025) | 39.0°F (2021) | 0.22 in (2023) |
| September 26 | 84.0°F (2025) | 37.9°F (2018) | 0.47 in (2017) |
| September 27 | 89.1°F (2021) | 37.0°F (2018) | 0.23 in (2013) |
| September 28 | 84.0°F (2021) | 36.0°F (2018) | 1.35 in (2013) |
| September 29 | 89.1°F (2021) | 33.1°F (2018) | 0.12 in (2013) |
| September 30 | 89.1°F (2025) | 36.0°F (2018) | 0.09 in (2023) |