September weather in Box Elder, SD
The average temperature in Box Elder in September is 61.3°F (46.4°F–76.1°F). Average precipitation: 1.22 inches.
September is a fall month in Box Elder, and is warmer than the annual average of 46.7°F. Daily temperatures swing about 29.7°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
76.1°F
Avg Low
46.4°F
Precipitation
1.22 in
Snow
0.1 in
September records in Box Elder
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (2012) | 39.9°F (1974) | 1.09 in (2018) |
| September 2 | 104.0°F (1960) | 37.9°F (1974) | 0.75 in (1986) |
| September 3 | 100.0°F (1948) | 36.0°F (1974) | 0.44 in (2004) |
| September 4 | 104.0°F (1960) | 34.0°F (1962) | 1.11 in (1971) |
| September 5 | 104.0°F (2020) | 35.1°F (2025) | 1.76 in (1990) |
| September 6 | 104.0°F (1978) | 33.1°F (2025) | 0.34 in (2007) |
| September 7 | 99.0°F (1978) | 32.0°F (2020) | 0.96 in (2020) |
| September 8 | 102.9°F (1959) | 30.2°F (2020) | 0.94 in (1989) |
| September 9 | 102.0°F (1979) | 24.3°F (2020) | 0.85 in (2002) |
| September 10 | 100.0°F (2012) | 27.1°F (2020) | 0.86 in (2003) |
| September 11 | 100.0°F (2025) | 28.9°F (1989) | 1.65 in (2019) |
| September 12 | 97.0°F (1990) | 28.2°F (2014) | 1.40 in (2009) |
| September 13 | 93.0°F (2015) | 28.9°F (1949) | 2.13 in (1966) |
| September 14 | 100.0°F (1948) | 24.1°F (1993) | 0.46 in (2001) |
| September 15 | 102.9°F (1948) | 32.0°F (1965) | 0.53 in (1967) |
| September 16 | 95.0°F (1949) | 30.0°F (1965) | 0.78 in (1959) |
| September 17 | 100.9°F (2000) | 26.1°F (1991) | 0.57 in (2025) |
| September 18 | 97.0°F (1998) | 24.1°F (1991) | 0.57 in (2002) |
| September 19 | 95.0°F (2022) | 21.9°F (1991) | 0.61 in (1950) |
| September 20 | 93.0°F (1960) | 28.9°F (1983) | 1.83 in (1955) |
| September 21 | 91.9°F (2013) | 23.0°F (1995) | 0.45 in (1998) |
| September 22 | 95.0°F (2007) | 19.0°F (1995) | 0.87 in (2006) |
| September 23 | 97.0°F (1992) | 24.1°F (1985) | 1.32 in (1977) |
| September 24 | 93.9°F (1992) | 18.0°F (1985) | 1.00 in (1959) |
| September 25 | 93.0°F (2008) | 24.1°F (1984) | 0.46 in (1955) |
| September 26 | 99.0°F (2024) | 21.9°F (1972) | 0.36 in (1966) |
| September 27 | 93.9°F (1952) | 26.1°F (1951) | 0.78 in (1982) |
| September 28 | 93.9°F (2021) | 25.0°F (1951) | 0.57 in (2019) |
| September 29 | 100.0°F (2024) | 21.0°F (1984) | 2.05 in (2014) |
| September 30 | 93.0°F (1967) | 25.0°F (1959) | 0.56 in (2014) |