September weather in Hartford, WI
The average temperature in Hartford in September is 60.1°F (48.4°F–71.8°F). Average precipitation: 3.23 inches.
September is a fall month in Hartford, and is warmer than the annual average of 44.7°F. Daily temperatures swing about 23.4°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
71.8°F
Avg Low
48.4°F
Precipitation
3.23 in
Daylight
12h 17m
September records in Hartford
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 97.0°F (1953) | 37.9°F (1994) | 1.29 in (2010) |
| September 2 | 95.0°F (1953) | 37.9°F (1976) | 1.50 in (2002) |
| September 3 | 93.0°F (1953) | 39.9°F (1974) | 1.78 in (1970) |
| September 4 | 96.1°F (1999) | 36.0°F (1974) | 1.30 in (1953) |
| September 5 | 93.9°F (1999) | 34.0°F (1988) | 1.45 in (2008) |
| September 6 | 96.1°F (1999) | 33.1°F (1962) | 1.70 in (1970) |
| September 7 | 95.0°F (1985) | 36.0°F (1986) | 1.37 in (1965) |
| September 8 | 93.9°F (1978) | 37.0°F (2025) | 2.86 in (1985) |
| September 9 | 93.9°F (1955) | 35.1°F (1975) | 1.85 in (1895) |
| September 10 | 93.0°F (1955) | 36.0°F (1976) | 5.20 in (1986) |
| September 11 | 93.9°F (2013) | 32.0°F (1898) | 1.15 in (1991) |
| September 12 | 89.1°F (2005) | 30.9°F (1955) | 2.65 in (2022) |
| September 13 | 89.1°F (1998) | 32.0°F (1975) | 2.82 in (1961) |
| September 14 | 91.0°F (1998) | 30.0°F (1974) | 2.32 in (1961) |
| September 15 | 84.9°F (2004) | 32.0°F (1964) | 2.56 in (1894) |
| September 16 | 90.0°F (1899) | 30.9°F (1984) | 0.89 in (1980) |
| September 17 | 88.0°F (1955) | 32.0°F (1984) | 1.27 in (1992) |
| September 18 | 90.0°F (1955) | 30.0°F (1981) | 1.93 in (1972) |
| September 19 | 86.0°F (1984) | 28.9°F (2012) | 3.32 in (1960) |
| September 20 | 84.9°F (1978) | 28.0°F (1956) | 2.06 in (1965) |
| September 21 | 87.1°F (2017) | 32.0°F (1897) | 2.38 in (1972) |
| September 22 | 88.0°F (2005) | 26.1°F (1974) | 2.64 in (1980) |
| September 23 | 91.9°F (2017) | 24.1°F (1974) | 1.22 in (2000) |
| September 24 | 91.0°F (2017) | 23.0°F (1976) | 2.63 in (1977) |
| September 25 | 91.0°F (2017) | 28.9°F (2012) | 1.35 in (1984) |
| September 26 | 89.1°F (2017) | 26.1°F (1991) | 2.26 in (2011) |
| September 27 | 84.0°F (1954) | 28.9°F (1899) | 1.52 in (1959) |
| September 28 | 84.0°F (1971) | 28.9°F (1957) | 1.11 in (1999) |
| September 29 | 90.0°F (1953) | 24.1°F (1984) | 1.08 in (1954) |
| September 30 | 88.0°F (1971) | 25.0°F (1984) | 1.71 in (1896) |