September weather in Willmar, MN
The average temperature in Willmar in September is 61.1°F (50.1°F–72.1°F). Average precipitation: 2.64 inches.
September is a fall month in Willmar, and is warmer than the annual average of 43.7°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
72.1°F
Avg Low
50.1°F
Precipitation
2.64 in
Daylight
12h 18m
September records in Willmar
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (1894) | 35.1°F (1949) | 3.95 in (1942) |
| September 2 | 93.9°F (1937) | 37.9°F (1893) | 2.10 in (1927) |
| September 3 | 95.0°F (1925) | 28.0°F (1974) | 1.13 in (1994) |
| September 4 | 97.0°F (1925) | 33.1°F (1918) | 2.45 in (1925) |
| September 5 | 96.1°F (1945) | 33.1°F (1918) | 1.10 in (1979) |
| September 6 | 95.0°F (1893) | 37.0°F (1956) | 2.25 in (1958) |
| September 7 | 99.0°F (1978) | 34.0°F (1895) | 1.63 in (2001) |
| September 8 | 102.0°F (1931) | 37.0°F (1995) | 4.25 in (1991) |
| September 9 | 99.0°F (1931) | 32.0°F (1898) | 2.38 in (1991) |
| September 10 | 105.1°F (1931) | 30.9°F (1894) | 1.08 in (1933) |
| September 11 | 96.1°F (1931) | 32.0°F (1898) | 2.73 in (1901) |
| September 12 | 93.9°F (1927) | 33.1°F (1940) | 2.35 in (2005) |
| September 13 | 95.0°F (1939) | 28.0°F (1923) | 2.47 in (2005) |
| September 14 | 99.0°F (1939) | 32.0°F (1923) | 1.93 in (1978) |
| September 15 | 95.0°F (1948) | 30.9°F (1894) | 2.40 in (1963) |
| September 16 | 91.0°F (1948) | 28.0°F (1937) | 1.14 in (1896) |
| September 17 | 99.0°F (1895) | 27.0°F (1894) | 1.83 in (1986) |
| September 18 | 89.1°F (1947) | 28.9°F (1929) | 1.67 in (1926) |
| September 19 | 93.9°F (1895) | 27.0°F (1896) | 1.99 in (1957) |
| September 20 | 95.0°F (1984) | 30.0°F (1896) | 1.39 in (1993) |
| September 21 | 97.0°F (1937) | 25.0°F (1925) | 1.85 in (1948) |
| September 22 | 97.0°F (1936) | 19.0°F (1974) | 2.30 in (1959) |
| September 23 | 90.0°F (1935) | 28.0°F (1983) | 1.14 in (1968) |
| September 24 | 90.0°F (1935) | 26.1°F (1894) | 2.60 in (1984) |
| September 25 | 84.9°F (1979) | 19.9°F (1893) | 5.22 in (1929) |
| September 26 | 89.1°F (1974) | 19.9°F (1939) | 0.83 in (1920) |
| September 27 | 93.9°F (1956) | 24.1°F (1893) | 0.39 in (1946) |
| September 28 | 89.1°F (1894) | 21.9°F (1942) | 0.23 in (1972) |
| September 29 | 87.1°F (1897) | 21.0°F (1899) | 1.31 in (1988) |
| September 30 | 87.1°F (1976) | 19.9°F (1939) | 2.05 in (1965) |