September weather in Brandon, SD
The average temperature in Brandon in September is 63.8°F (51.9°F–75.6°F). Average precipitation: 2.73 inches.
September is a fall month in Brandon, and is warmer than the annual average of 47.4°F. Daily temperatures swing about 23.7°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
75.6°F
Avg Low
51.9°F
Precipitation
2.73 in
Daylight
12h 17m
September records in Brandon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1970) | 36.0°F (1974) | 2.00 in (1992) |
| September 2 | 100.9°F (2023) | 36.0°F (1974) | 1.98 in (1933) |
| September 3 | 97.0°F (2023) | 30.9°F (1974) | 1.65 in (1979) |
| September 4 | 100.0°F (2023) | 36.0°F (1974) | 1.60 in (1971) |
| September 5 | 98.1°F (1990) | 35.1°F (1965) | 1.46 in (2016) |
| September 6 | 104.0°F (1976) | 34.0°F (1956) | 1.79 in (1948) |
| September 7 | 100.0°F (1971) | 35.1°F (2025) | 1.32 in (1989) |
| September 8 | 98.1°F (1947) | 36.0°F (1992) | 2.88 in (1946) |
| September 9 | 95.0°F (1981) | 37.0°F (1943) | 2.73 in (1982) |
| September 10 | 95.0°F (1981) | 36.0°F (1940) | 2.63 in (2003) |
| September 11 | 96.1°F (2012) | 34.0°F (1955) | 4.02 in (1966) |
| September 12 | 96.1°F (1990) | 35.1°F (1975) | 1.58 in (1979) |
| September 13 | 96.1°F (1939) | 33.1°F (1975) | 1.42 in (1938) |
| September 14 | 97.0°F (1939) | 33.1°F (1949) | 1.57 in (1938) |
| September 15 | 99.0°F (1955) | 30.0°F (2007) | 3.61 in (2016) |
| September 16 | 96.1°F (1955) | 35.1°F (1934) | 2.40 in (1986) |
| September 17 | 93.9°F (1955) | 33.1°F (1981) | 0.40 in (1945) |
| September 18 | 93.9°F (1947) | 30.0°F (1991) | 2.07 in (1986) |
| September 19 | 95.0°F (1984) | 27.0°F (1991) | 2.66 in (2018) |
| September 20 | 95.0°F (2022) | 30.0°F (1983) | 3.07 in (2018) |
| September 21 | 93.0°F (1937) | 27.0°F (1934) | 1.70 in (1959) |
| September 22 | 93.9°F (1936) | 24.1°F (1974) | 1.20 in (1959) |
| September 23 | 91.9°F (1935) | 27.0°F (1989) | 1.42 in (2010) |
| September 24 | 89.1°F (1935) | 28.9°F (1965) | 1.51 in (2005) |
| September 25 | 91.9°F (1956) | 28.0°F (2000) | 1.29 in (1934) |
| September 26 | 93.9°F (1956) | 23.0°F (1984) | 0.83 in (1973) |
| September 27 | 96.1°F (1956) | 28.0°F (1935) | 0.76 in (1947) |
| September 28 | 91.0°F (2024) | 24.1°F (1951) | 1.51 in (1988) |
| September 29 | 91.9°F (2025) | 26.1°F (1984) | 1.32 in (1962) |
| September 30 | 93.0°F (2023) | 21.9°F (1974) | 2.71 in (1977) |