September weather in Groton, SD
The average temperature in Groton in September is °F (°F–°F). Average precipitation: 2.38 inches.
September is a fall month in Groton, and is cooler than the annual average of 0°F. Expect about 7 days with precipitation. Daylight averages about 12h 18m.
Avg High
°F
Avg Low
°F
Precipitation
2.38 in
Daylight
12h 18m
September records in Groton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | — | — | 0.09 in (2013) |
| September 2 | — | — | 1.64 in (2008) |
| September 3 | — | — | 0.14 in (2009) |
| September 4 | — | — | 0.01 in (2012) |
| September 5 | — | — | 0.78 in (2004) |
| September 6 | — | — | 0.32 in (2016) |
| September 7 | — | — | 1.50 in (2010) |
| September 8 | — | — | 0.35 in (2005) |
| September 9 | — | — | 1.01 in (2009) |
| September 10 | — | — | 0.22 in (2017) |
| September 11 | — | — | 0.57 in (2008) |
| September 12 | — | — | 0.16 in (2009) |
| September 13 | — | — | 0.63 in (2005) |
| September 14 | — | — | 0.50 in (2008) |
| September 15 | — | — | 0.66 in (2004) |
| September 16 | — | — | 2.05 in (2010) |
| September 17 | — | — | 0.30 in (2006) |
| September 18 | — | — | 0.46 in (2011) |
| September 19 | — | — | 0.39 in (2005) |
| September 20 | — | — | 0.95 in (2017) |
| September 21 | — | — | 0.88 in (2009) |
| September 22 | — | — | 0.93 in (2006) |
| September 23 | — | — | 1.04 in (2004) |
| September 24 | — | — | 2.08 in (2017) |
| September 25 | — | — | 0.38 in (2017) |
| September 26 | — | — | 0.29 in (2005) |
| September 27 | — | — | 0.00 in (2003) |
| September 28 | — | — | 0.09 in (2005) |
| September 29 | — | — | 1.02 in (2013) |
| September 30 | — | — | 0.30 in (2017) |