September weather in Onida, SD
The average temperature in Onida in September is 63.0°F (49.4°F–76.5°F). Average precipitation: 1.78 inches.
September is a fall month in Onida, and is warmer than the annual average of 46°F. Daily temperatures swing about 27.1°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
76.5°F
Avg Low
49.4°F
Precipitation
1.78 in
Daylight
12h 18m
September records in Onida
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 106.0°F (1937) | 34.0°F (1934) | 1.69 in (1963) |
| September 2 | 106.0°F (1983) | 36.0°F (1972) | 5.08 in (1999) |
| September 3 | 102.0°F (2005) | 34.0°F (1928) | 0.93 in (1943) |
| September 4 | 102.0°F (1978) | 36.0°F (1956) | 1.37 in (2016) |
| September 5 | 104.0°F (1978) | 35.1°F (1962) | 0.80 in (2004) |
| September 6 | 108.0°F (1976) | 33.1°F (1956) | 0.86 in (1916) |
| September 7 | 106.0°F (1931) | 32.0°F (1986) | 0.77 in (1938) |
| September 8 | 102.9°F (1931) | 34.0°F (1992) | 0.67 in (1929) |
| September 9 | 108.0°F (1931) | 30.9°F (2020) | 1.40 in (2002) |
| September 10 | 106.0°F (1931) | 30.0°F (1922) | 0.80 in (1915) |
| September 11 | 99.0°F (1931) | 28.9°F (1955) | 0.54 in (1932) |
| September 12 | 104.0°F (2017) | 30.0°F (1989) | 1.60 in (2019) |
| September 13 | 99.0°F (2017) | 28.9°F (1949) | 0.82 in (1994) |
| September 14 | 100.9°F (1939) | 30.9°F (1993) | 1.24 in (1997) |
| September 15 | 104.0°F (1948) | 28.0°F (1934) | 2.11 in (2010) |
| September 16 | 100.9°F (1925) | 30.0°F (1958) | 0.80 in (1965) |
| September 17 | 97.0°F (1989) | 33.1°F (1959) | 0.73 in (1959) |
| September 18 | 100.0°F (1998) | 28.9°F (1991) | 2.54 in (2025) |
| September 19 | 98.1°F (1972) | 19.9°F (1991) | 2.87 in (1996) |
| September 20 | 102.9°F (1937) | 28.0°F (1927) | 1.53 in (1989) |
| September 21 | 98.1°F (1936) | 25.0°F (1927) | 1.86 in (1989) |
| September 22 | 100.9°F (1936) | 25.0°F (2012) | 1.40 in (1959) |
| September 23 | 97.0°F (1935) | 24.1°F (2012) | 1.27 in (1977) |
| September 24 | 93.0°F (1935) | 23.0°F (1942) | 1.30 in (2017) |
| September 25 | 91.0°F (1938) | 12.9°F (1926) | 0.91 in (1959) |
| September 26 | 96.1°F (1974) | 19.0°F (1942) | 0.82 in (1929) |
| September 27 | 98.1°F (1956) | 21.9°F (1928) | 0.76 in (2013) |
| September 28 | 93.9°F (1958) | 21.9°F (1951) | 0.27 in (2002) |
| September 29 | 96.1°F (2024) | 25.0°F (1984) | 0.94 in (1965) |
| September 30 | 95.0°F (1989) | 18.0°F (1974) | 0.40 in (1983) |