September weather in Winter, WI
The average temperature in Winter in September is 57.2°F (46.4°F–68.0°F). Average precipitation: 4.46 inches.
September is a fall month in Winter, and is warmer than the annual average of 40.9°F. Daily temperatures swing about 21.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
68.0°F
Avg Low
46.4°F
Precipitation
4.46 in
Daylight
12h 18m
September records in Winter
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1961) | 30.9°F (1935) | 1.42 in (1922) |
| September 2 | 90.0°F (1953) | 30.9°F (1916) | 1.76 in (1960) |
| September 3 | 90.0°F (1929) | 27.0°F (1946) | 2.14 in (2019) |
| September 4 | 91.9°F (1929) | 28.9°F (1918) | 2.93 in (1996) |
| September 5 | 91.0°F (1922) | 26.1°F (1946) | 2.49 in (2002) |
| September 6 | 91.0°F (1922) | 30.9°F (1988) | 3.60 in (1990) |
| September 7 | 91.0°F (1922) | 28.0°F (1932) | 2.42 in (1991) |
| September 8 | 93.9°F (1976) | 28.9°F (1944) | 1.59 in (1960) |
| September 9 | 91.0°F (1931) | 30.0°F (1944) | 1.63 in (1938) |
| September 10 | 88.0°F (1931) | 21.0°F (1918) | 1.01 in (2014) |
| September 11 | 95.0°F (1931) | 24.1°F (1917) | 1.38 in (1947) |
| September 12 | 91.9°F (1931) | 25.0°F (1943) | 2.57 in (1990) |
| September 13 | 95.0°F (1931) | 25.0°F (1963) | 3.00 in (1994) |
| September 14 | 88.0°F (1927) | 24.1°F (1923) | 2.25 in (1967) |
| September 15 | 89.1°F (1939) | 21.0°F (1964) | 4.20 in (1994) |
| September 16 | 89.1°F (1939) | 26.1°F (1932) | 2.03 in (2010) |
| September 17 | 91.0°F (1948) | 24.1°F (1959) | 2.30 in (1926) |
| September 18 | 87.1°F (1948) | 21.0°F (1916) | 2.00 in (2003) |
| September 19 | 87.1°F (1955) | 19.9°F (1992) | 1.86 in (1944) |
| September 20 | 86.0°F (1940) | 21.0°F (1942) | 1.23 in (1988) |
| September 21 | 84.9°F (1919) | 24.1°F (1917) | 3.83 in (2018) |
| September 22 | 84.0°F (1941) | 26.1°F (1934) | 3.19 in (2016) |
| September 23 | 86.0°F (1936) | 23.0°F (1974) | 2.34 in (1968) |
| September 24 | 88.0°F (1937) | 21.0°F (1976) | 2.82 in (2010) |
| September 25 | 90.0°F (1920) | 17.1°F (1947) | 2.60 in (2019) |
| September 26 | 88.0°F (1920) | 19.9°F (1939) | 2.35 in (1930) |
| September 27 | 82.0°F (1923) | 21.9°F (1947) | 1.68 in (2020) |
| September 28 | 87.1°F (1923) | 18.0°F (1947) | 0.60 in (1965) |
| September 29 | 82.9°F (1922) | 18.0°F (1945) | 0.70 in (1925) |
| September 30 | 84.9°F (1948) | 18.0°F (1918) | 1.63 in (1995) |