September weather in Erwin, SD
The average temperature in Erwin in September is °F (°F–°F). Average precipitation: 3.00 inches.
September is a fall month in Erwin, and is cooler than the annual average of 0°F. Expect about 7 days with precipitation. Daylight averages about 12h 17m.
Avg High
°F
Avg Low
°F
Precipitation
3.00 in
Daylight
12h 17m
September records in Erwin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1913) | 54.0°F (1912) | 1.33 in (1966) |
| September 2 | 73.9°F (1916) | 45.0°F (1912) | 2.10 in (1985) |
| September 3 | 90.0°F (1913) | 62.1°F (1913) | 1.07 in (1963) |
| September 4 | 96.1°F (1913) | 64.0°F (1916) | 1.90 in (1999) |
| September 5 | 99.0°F (1913) | 60.1°F (1916) | 1.32 in (1992) |
| September 6 | 98.1°F (1913) | 50.0°F (1912) | 1.50 in (1981) |
| September 7 | 84.9°F (1912) | 55.0°F (1916) | 1.05 in (1917) |
| September 8 | 90.0°F (1912) | 52.0°F (1916) | 3.71 in (1985) |
| September 9 | 82.9°F (1913) | 57.9°F (1913) | 1.98 in (1914) |
| September 10 | — | 52.0°F (1912) | 0.96 in (1983) |
| September 11 | 71.1°F (1913) | 39.9°F (1916) | 0.67 in (1975) |
| September 12 | 73.0°F (1913) | 46.9°F (1913) | 2.41 in (2005) |
| September 13 | 80.1°F (1913) | 48.0°F (1916) | 0.76 in (1993) |
| September 14 | 75.9°F (1913) | 35.1°F (1916) | 0.72 in (2001) |
| September 15 | 55.0°F (1916) | 39.9°F (1912) | 1.41 in (2004) |
| September 16 | 73.0°F (1913) | 35.1°F (1912) | 1.36 in (2010) |
| September 17 | 71.1°F (1913) | 33.1°F (1916) | 1.01 in (1986) |
| September 18 | 77.0°F (1913) | 35.1°F (1912) | 0.62 in (1977) |
| September 19 | 75.0°F (1912) | 43.0°F (1912) | 1.93 in (1957) |
| September 20 | 73.9°F (1916) | 34.0°F (1913) | 0.67 in (2004) |
| September 21 | 60.1°F (1916) | 32.0°F (1913) | 0.86 in (1977) |
| September 22 | 60.1°F (1912) | 24.1°F (1913) | 1.02 in (2004) |
| September 23 | 66.0°F (1912) | 32.0°F (1913) | 1.02 in (1977) |
| September 24 | 70.0°F (1916) | 33.1°F (1912) | 1.15 in (2015) |
| September 25 | 70.0°F (1916) | 32.0°F (1913) | 1.79 in (2005) |
| September 26 | 64.9°F (1913) | 28.9°F (1912) | 0.52 in (1996) |
| September 27 | 69.1°F (1913) | 28.0°F (1912) | 0.79 in (1965) |
| September 28 | 66.9°F (1913) | 34.0°F (1912) | 1.47 in (2013) |
| September 29 | 63.0°F (1913) | 35.1°F (1912) | 0.90 in (2004) |
| September 30 | 73.0°F (1916) | 28.9°F (1912) | 3.08 in (1995) |