September weather in Sioux Center, IA
The average temperature in Sioux Center in September is 64.2°F (51.2°F–77.1°F). Average precipitation: 3.21 inches.
September is a fall month in Sioux Center, and is warmer than the annual average of 48°F. Daily temperatures swing about 25.9°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
77.1°F
Avg Low
51.2°F
Precipitation
3.21 in
Daylight
12h 17m
September records in Sioux Center
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1913) | 37.9°F (1974) | 2.00 in (1933) |
| September 2 | 102.0°F (1925) | 37.9°F (1974) | 3.00 in (1933) |
| September 3 | 100.9°F (1925) | 30.9°F (1974) | 2.45 in (1970) |
| September 4 | 99.0°F (1925) | 37.0°F (1974) | 1.54 in (1980) |
| September 5 | 98.1°F (1913) | 36.0°F (1962) | 2.00 in (1938) |
| September 6 | 102.0°F (1976) | 37.9°F (1934) | 2.10 in (1936) |
| September 7 | 100.9°F (1931) | 33.1°F (1986) | 2.71 in (2007) |
| September 8 | 98.1°F (1931) | 33.1°F (1986) | 3.16 in (1926) |
| September 9 | 99.0°F (1931) | 36.0°F (1910) | 1.60 in (1914) |
| September 10 | 100.0°F (1931) | 36.0°F (1917) | 2.02 in (1949) |
| September 11 | 96.1°F (2012) | 33.1°F (1955) | 5.90 in (1900) |
| September 12 | 97.0°F (2012) | 30.0°F (1902) | 2.23 in (1909) |
| September 13 | 97.0°F (1931) | 30.0°F (1902) | 1.75 in (1938) |
| September 14 | 93.9°F (2000) | 34.0°F (1989) | 2.28 in (1986) |
| September 15 | 96.1°F (1955) | 30.0°F (1993) | 3.20 in (1936) |
| September 16 | 95.0°F (1955) | 30.0°F (1903) | 3.50 in (1906) |
| September 17 | 95.0°F (1955) | 30.0°F (1900) | 5.98 in (1926) |
| September 18 | 91.9°F (1998) | 28.9°F (1918) | 5.68 in (1926) |
| September 19 | 96.1°F (1984) | 24.1°F (1991) | 2.56 in (2018) |
| September 20 | 100.0°F (2022) | 26.1°F (1918) | 3.33 in (2018) |
| September 21 | 100.0°F (2022) | 27.0°F (1999) | 2.58 in (1923) |
| September 22 | 93.9°F (1936) | 25.0°F (1913) | 1.00 in (1994) |
| September 23 | 91.9°F (2017) | 27.0°F (1983) | 2.01 in (2010) |
| September 24 | 88.0°F (1935) | 30.0°F (2002) | 1.60 in (2015) |
| September 25 | 90.0°F (1956) | 24.1°F (1926) | 1.75 in (2017) |
| September 26 | 93.0°F (1956) | 21.0°F (1984) | 1.30 in (1929) |
| September 27 | 93.0°F (1956) | 28.9°F (1928) | 0.72 in (1901) |
| September 28 | 89.1°F (2021) | 24.1°F (1967) | 1.67 in (1988) |
| September 29 | 90.0°F (2023) | 21.9°F (1899) | 1.93 in (1965) |
| September 30 | 91.9°F (2023) | 24.1°F (1984) | 3.15 in (1923) |