September weather in Bonesteel, SD
The average temperature in Bonesteel in September is 63.6°F (50.7°F–76.4°F). Average precipitation: 2.91 inches.
September is a fall month in Bonesteel, and is warmer than the annual average of 47.6°F. Daily temperatures swing about 25.7°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
76.4°F
Avg Low
50.7°F
Precipitation
2.91 in
Daylight
12h 17m
September records in Bonesteel
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1970) | 36.0°F (1965) | 0.67 in (1963) |
| September 2 | 98.1°F (1960) | 41.0°F (1974) | 0.90 in (1993) |
| September 3 | 100.9°F (1979) | 30.9°F (1974) | 1.07 in (1962) |
| September 4 | 100.0°F (1983) | 39.0°F (1962) | 2.30 in (1999) |
| September 5 | 102.9°F (1978) | 36.0°F (1962) | 2.40 in (1987) |
| September 6 | 102.9°F (1970) | 35.1°F (1956) | 1.30 in (1995) |
| September 7 | 100.0°F (1970) | 39.0°F (1986) | 2.10 in (1997) |
| September 8 | 96.1°F (1979) | 37.0°F (1992) | 0.90 in (1976) |
| September 9 | 102.9°F (1979) | 37.0°F (1992) | 0.65 in (1989) |
| September 10 | 96.1°F (1974) | 35.1°F (1959) | 0.65 in (1984) |
| September 11 | 98.1°F (1998) | 35.1°F (1989) | 1.10 in (1979) |
| September 12 | 95.0°F (1998) | 33.1°F (1989) | 1.53 in (1977) |
| September 13 | 97.0°F (1990) | 28.0°F (1974) | 2.20 in (1991) |
| September 14 | 97.0°F (1990) | 32.0°F (1961) | 1.75 in (2001) |
| September 15 | 90.0°F (1969) | 34.0°F (1961) | 2.20 in (1986) |
| September 16 | 89.1°F (1972) | 35.1°F (1965) | 3.40 in (1987) |
| September 17 | 91.9°F (2003) | 30.9°F (1965) | 1.00 in (1967) |
| September 18 | 96.1°F (2000) | 32.0°F (1965) | 3.10 in (1986) |
| September 19 | 93.0°F (1972) | 28.9°F (1991) | 2.60 in (1996) |
| September 20 | 99.0°F (1984) | 28.9°F (1991) | 3.20 in (1996) |
| September 21 | 90.0°F (1980) | 33.1°F (1982) | 1.60 in (1977) |
| September 22 | 88.0°F (1958) | 25.0°F (1995) | 1.20 in (1968) |
| September 23 | 89.1°F (1958) | 24.1°F (1995) | 0.65 in (1997) |
| September 24 | 89.1°F (2003) | 19.0°F (1965) | 0.75 in (1984) |
| September 25 | 93.0°F (1990) | 28.9°F (1961) | 0.45 in (1959) |
| September 26 | 97.0°F (1974) | 24.1°F (1965) | 1.70 in (1981) |
| September 27 | 97.0°F (1956) | 27.0°F (1964) | 0.35 in (1975) |
| September 28 | 93.0°F (1956) | 25.0°F (1976) | 1.40 in (1988) |
| September 29 | 88.0°F (1970) | 30.0°F (1976) | 1.20 in (1988) |
| September 30 | 91.9°F (1991) | 21.9°F (1974) | 1.10 in (1977) |