September weather in Mission, SD
The average temperature in Mission in September is 62.8°F (48.4°F–77.1°F). Average precipitation: 1.75 inches.
September is a fall month in Mission, and is warmer than the annual average of 47.5°F. Daily temperatures swing about 28.7°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
77.1°F
Avg Low
48.4°F
Precipitation
1.75 in
Daylight
12h 17m
September records in Mission
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (1975) | 34.0°F (1981) | 2.18 in (1966) |
| September 2 | 102.9°F (1983) | 36.0°F (1974) | 2.01 in (1999) |
| September 3 | 104.0°F (1983) | 30.9°F (1974) | 0.64 in (1999) |
| September 4 | 100.0°F (1990) | 36.0°F (1968) | 0.88 in (1999) |
| September 5 | 100.9°F (1998) | 39.0°F (1968) | 0.62 in (1971) |
| September 6 | 100.9°F (1998) | 39.0°F (1993) | 0.37 in (1986) |
| September 7 | 100.9°F (1976) | 34.0°F (1986) | 1.48 in (2007) |
| September 8 | 97.0°F (1978) | 36.0°F (1992) | 0.74 in (1979) |
| September 9 | 96.1°F (1970) | 35.1°F (1976) | 1.01 in (2002) |
| September 10 | 100.9°F (1983) | 34.0°F (1970) | 0.82 in (2002) |
| September 11 | 100.9°F (1982) | 30.9°F (1989) | 0.79 in (1989) |
| September 12 | 93.0°F (1980) | 30.9°F (1989) | 1.13 in (1982) |
| September 13 | 99.0°F (1981) | 28.9°F (1974) | 0.94 in (2002) |
| September 14 | 93.0°F (1971) | 28.0°F (1993) | 0.55 in (1966) |
| September 15 | 91.9°F (1968) | 30.9°F (1993) | 0.69 in (1976) |
| September 16 | 93.0°F (1995) | 28.9°F (1981) | 0.73 in (1966) |
| September 17 | 93.0°F (2003) | 28.0°F (1971) | 0.95 in (1968) |
| September 18 | 96.1°F (2000) | 26.1°F (1991) | 0.95 in (1996) |
| September 19 | 93.9°F (1972) | 21.9°F (1991) | 1.05 in (1996) |
| September 20 | 95.0°F (1970) | 26.1°F (1991) | 1.00 in (1996) |
| September 21 | 96.1°F (2010) | 27.0°F (1974) | 2.83 in (1989) |
| September 22 | 88.0°F (2005) | 24.1°F (1995) | 1.16 in (2006) |
| September 23 | 91.9°F (1967) | 25.0°F (1995) | 1.06 in (2004) |
| September 24 | 91.9°F (2007) | 26.1°F (1985) | 0.68 in (2005) |
| September 25 | 90.0°F (1990) | 28.0°F (1975) | 0.42 in (1986) |
| September 26 | 93.9°F (1967) | 24.1°F (1972) | 0.72 in (1996) |
| September 27 | 93.9°F (1974) | 23.0°F (1967) | 0.12 in (1973) |
| September 28 | 91.9°F (1983) | 24.1°F (1967) | 0.37 in (1988) |
| September 29 | 91.9°F (1969) | 24.1°F (1984) | 1.38 in (1973) |
| September 30 | 91.9°F (1991) | 18.0°F (1974) | 1.01 in (1977) |