September weather in Plum City, WI
The average temperature in Plum City in September is 61.7°F (50.4°F–73.0°F). Average precipitation: 3.76 inches.
September is a fall month in Plum City, and is warmer than the annual average of 45.1°F. Daily temperatures swing about 22.6°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
73.0°F
Avg Low
50.4°F
Precipitation
3.76 in
Daylight
12h 18m
September records in Plum City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 87.1°F (2022) | 44.1°F (2009) | 1.60 in (2002) |
| September 2 | 91.9°F (2011) | 46.0°F (2009) | 1.07 in (2000) |
| September 3 | 91.9°F (2023) | 46.0°F (2013) | 0.87 in (2019) |
| September 4 | 99.0°F (2023) | 46.0°F (2010) | 0.63 in (1992) |
| September 5 | 96.1°F (2023) | 43.0°F (2025) | 3.50 in (2018) |
| September 6 | 90.0°F (2007) | 45.0°F (2008) | 1.08 in (1946) |
| September 7 | 90.0°F (2013) | 41.0°F (2024) | 3.11 in (2016) |
| September 8 | 91.9°F (2013) | 39.9°F (2024) | 1.31 in (1991) |
| September 9 | 84.0°F (2022) | 39.9°F (2008) | 2.76 in (1946) |
| September 10 | 93.0°F (2013) | 39.0°F (2020) | 0.95 in (2014) |
| September 11 | 86.0°F (2011) | 39.0°F (2020) | 2.36 in (2019) |
| September 12 | 93.0°F (2012) | 37.0°F (2007) | 0.81 in (1949) |
| September 13 | 88.0°F (2011) | 36.0°F (2014) | 2.22 in (1993) |
| September 14 | 86.0°F (2017) | 36.0°F (2014) | 1.31 in (1954) |
| September 15 | 87.1°F (2017) | 30.0°F (2007) | 7.05 in (1992) |
| September 16 | 91.0°F (2018) | 30.0°F (2007) | 1.45 in (2010) |
| September 17 | 87.1°F (2024) | 39.9°F (2011) | 0.64 in (1992) |
| September 18 | 86.0°F (2018) | 34.0°F (2020) | 1.70 in (2003) |
| September 19 | 84.0°F (2024) | 34.0°F (2020) | 1.35 in (1944) |
| September 20 | 88.0°F (2021) | 37.0°F (2020) | 0.70 in (2014) |
| September 21 | 88.0°F (2022) | 46.0°F (2013) | 1.01 in (1994) |
| September 22 | 82.9°F (2017) | 37.9°F (2012) | 1.86 in (2016) |
| September 23 | 93.0°F (2017) | 30.9°F (2012) | 2.75 in (2010) |
| September 24 | 89.1°F (2017) | 30.9°F (2012) | 2.69 in (2010) |
| September 25 | 89.1°F (2017) | 41.0°F (2011) | 1.61 in (2019) |
| September 26 | 82.9°F (2020) | 34.0°F (2012) | 0.78 in (1996) |
| September 27 | 84.0°F (2008) | 34.0°F (2012) | 0.30 in (1997) |
| September 28 | 82.0°F (2015) | 33.1°F (2022) | 0.91 in (1947) |
| September 29 | 84.0°F (2008) | 34.0°F (2018) | 0.87 in (2002) |
| September 30 | 84.9°F (2025) | 30.9°F (2009) | 0.66 in (2007) |