September weather in Amherst Junction, WI
The average temperature in Amherst Junction in September is 60.3°F (49.1°F–71.4°F). Average precipitation: 3.84 inches.
September is a fall month in Amherst Junction, and is warmer than the annual average of 44.3°F. Daily temperatures swing about 22.3°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
71.4°F
Avg Low
49.1°F
Precipitation
3.84 in
Daylight
12h 17m
September records in Amherst Junction
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1953) | 30.9°F (1989) | 0.95 in (2010) |
| September 2 | 93.0°F (1953) | 33.1°F (1994) | 1.75 in (1977) |
| September 3 | 91.9°F (1960) | 33.1°F (1974) | 1.29 in (2010) |
| September 4 | 100.0°F (2023) | 35.1°F (1974) | 0.95 in (2018) |
| September 5 | 95.0°F (2023) | 34.0°F (1962) | 1.20 in (2018) |
| September 6 | 91.0°F (1960) | 28.9°F (1988) | 1.95 in (1958) |
| September 7 | 93.9°F (1976) | 30.0°F (1986) | 2.31 in (2015) |
| September 8 | 93.9°F (1976) | 36.0°F (1951) | 2.36 in (1964) |
| September 9 | 91.9°F (1955) | 35.1°F (1975) | 1.26 in (1954) |
| September 10 | 91.0°F (2002) | 30.0°F (2020) | 2.86 in (1986) |
| September 11 | 89.1°F (1952) | 32.0°F (1955) | 1.83 in (2000) |
| September 12 | 91.0°F (1948) | 27.0°F (1955) | 1.75 in (2019) |
| September 13 | 88.0°F (1952) | 25.0°F (1989) | 2.34 in (1962) |
| September 14 | 89.1°F (1998) | 21.9°F (1989) | 2.30 in (1990) |
| September 15 | 86.0°F (1948) | 28.0°F (2007) | 1.76 in (1967) |
| September 16 | 91.9°F (1948) | 28.0°F (2007) | 1.57 in (1992) |
| September 17 | 88.0°F (1948) | 28.9°F (1959) | 2.20 in (1942) |
| September 18 | 91.9°F (1948) | 28.9°F (1982) | 1.26 in (1972) |
| September 19 | 87.1°F (2000) | 28.9°F (1979) | 2.06 in (1965) |
| September 20 | 84.9°F (1998) | 27.0°F (1973) | 1.64 in (1983) |
| September 21 | 87.1°F (2024) | 24.1°F (1974) | 1.81 in (1980) |
| September 22 | 84.0°F (2005) | 21.9°F (1974) | 1.47 in (2024) |
| September 23 | 90.0°F (2017) | 24.1°F (1989) | 3.11 in (2010) |
| September 24 | 89.1°F (2017) | 19.0°F (1989) | 1.47 in (2010) |
| September 25 | 88.0°F (2017) | 19.0°F (1989) | 1.69 in (2020) |
| September 26 | 88.0°F (2017) | 24.1°F (1989) | 2.35 in (1998) |
| September 27 | 88.0°F (1994) | 23.0°F (1989) | 1.16 in (1946) |
| September 28 | 80.1°F (1952) | 25.0°F (1964) | 1.36 in (1947) |
| September 29 | 82.0°F (2014) | 21.9°F (1949) | 0.95 in (2005) |
| September 30 | 82.0°F (1971) | 24.1°F (1993) | 2.00 in (1981) |