September weather in Lake Delton, WI
The average temperature in Lake Delton in September is 60.9°F (48.6°F–73.1°F). Average precipitation: 3.84 inches.
September is a fall month in Lake Delton, and is warmer than the annual average of 45.7°F. Daily temperatures swing about 24.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
73.1°F
Avg Low
48.6°F
Precipitation
3.84 in
Daylight
12h 17m
September records in Lake Delton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1937) | 37.9°F (1949) | 1.80 in (2002) |
| September 2 | 98.1°F (1937) | 37.9°F (1946) | 2.14 in (1966) |
| September 3 | 95.0°F (1929) | 39.0°F (1974) | 1.36 in (1939) |
| September 4 | 96.1°F (2023) | 37.0°F (1974) | 2.04 in (1947) |
| September 5 | 93.0°F (1945) | 35.1°F (1988) | 2.30 in (1925) |
| September 6 | 95.0°F (1922) | 34.0°F (1986) | 1.49 in (1927) |
| September 7 | 100.9°F (1922) | 35.1°F (1986) | 3.79 in (2016) |
| September 8 | 98.1°F (1922) | 35.1°F (1995) | 2.00 in (1985) |
| September 9 | 98.1°F (1955) | 34.0°F (1975) | 2.34 in (1965) |
| September 10 | 93.9°F (2005) | 34.0°F (1976) | 2.20 in (1986) |
| September 11 | 91.0°F (1952) | 33.1°F (1955) | 2.50 in (1991) |
| September 12 | 97.0°F (1927) | 30.0°F (1955) | 2.23 in (1961) |
| September 13 | 100.0°F (1927) | 28.9°F (1923) | 2.05 in (1992) |
| September 14 | 98.1°F (1927) | 27.0°F (1923) | 3.20 in (1992) |
| September 15 | 99.0°F (1927) | 30.9°F (1923) | 1.45 in (1998) |
| September 16 | 93.9°F (1955) | 33.1°F (1984) | 2.00 in (1992) |
| September 17 | 93.9°F (1955) | 33.1°F (1984) | 1.65 in (1987) |
| September 18 | 93.9°F (1955) | 30.0°F (1929) | 3.21 in (1942) |
| September 19 | 93.0°F (1940) | 28.9°F (1929) | 0.84 in (1971) |
| September 20 | 90.0°F (1925) | 30.0°F (1929) | 1.65 in (1935) |
| September 21 | 90.0°F (1941) | 30.0°F (1991) | 2.30 in (1988) |
| September 22 | 93.0°F (1937) | 28.0°F (1974) | 4.87 in (2016) |
| September 23 | 93.0°F (1937) | 25.0°F (1995) | 1.70 in (1926) |
| September 24 | 93.0°F (2017) | 26.1°F (1995) | 1.14 in (1977) |
| September 25 | 91.0°F (2017) | 26.1°F (1942) | 1.22 in (1927) |
| September 26 | 91.0°F (2017) | 26.1°F (1926) | 1.16 in (1927) |
| September 27 | 84.9°F (1929) | 27.0°F (1991) | 0.80 in (2011) |
| September 28 | 87.1°F (1939) | 24.1°F (1942) | 2.44 in (1965) |
| September 29 | 89.1°F (1953) | 24.1°F (1949) | 0.61 in (1969) |
| September 30 | 88.0°F (1922) | 26.1°F (1984) | 2.85 in (1961) |