September weather in Zilwaukee, MI
The average temperature in Zilwaukee in September is 63.2°F (52.0°F–74.3°F). Average precipitation: 2.68 inches.
September is a fall month in Zilwaukee, and is warmer than the annual average of 48.3°F. Daily temperatures swing about 22.3°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
74.3°F
Avg Low
52.0°F
Precipitation
2.68 in
Daylight
12h 17m
September records in Zilwaukee
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (2010) | 45.0°F (2009) | 3.96 in (1945) |
| September 2 | 89.1°F (2011) | 45.0°F (2017) | 1.08 in (1922) |
| September 3 | 93.0°F (2011) | 46.0°F (2017) | 1.13 in (1984) |
| September 4 | 89.1°F (2007) | 48.9°F (2024) | 2.23 in (2015) |
| September 5 | 90.0°F (2018) | 46.0°F (2003) | 1.41 in (1943) |
| September 6 | 91.9°F (2007) | 46.0°F (2003) | 1.10 in (1985) |
| September 7 | 91.0°F (2016) | 42.1°F (2003) | 1.07 in (1989) |
| September 8 | 91.0°F (2002) | 42.1°F (2024) | 1.46 in (2021) |
| September 9 | 88.0°F (2002) | 43.0°F (2024) | 2.68 in (1942) |
| September 10 | 84.9°F (2002) | 43.0°F (2017) | 1.13 in (1985) |
| September 11 | 95.0°F (2013) | 45.0°F (2017) | 8.54 in (1986) |
| September 12 | 91.9°F (2005) | 41.0°F (2007) | 1.31 in (2022) |
| September 13 | 93.9°F (2005) | 42.1°F (2007) | 1.08 in (1944) |
| September 14 | 93.0°F (2005) | 41.0°F (2007) | 1.93 in (2008) |
| September 15 | 88.0°F (2004) | 37.0°F (2007) | 2.20 in (2008) |
| September 16 | 89.1°F (2024) | 36.0°F (2007) | 0.81 in (1983) |
| September 17 | 88.0°F (2018) | 37.0°F (2007) | 1.88 in (1981) |
| September 18 | 89.1°F (2018) | 39.0°F (2013) | 1.35 in (1983) |
| September 19 | 90.0°F (2002) | 36.0°F (2020) | 1.97 in (1985) |
| September 20 | 86.0°F (2002) | 37.0°F (2014) | 1.43 in (1997) |
| September 21 | 86.0°F (2024) | 39.0°F (2020) | 1.55 in (1983) |
| September 22 | 93.9°F (2017) | 43.0°F (2006) | 2.00 in (1947) |
| September 23 | 93.9°F (2017) | 39.0°F (2012) | 1.81 in (2021) |
| September 24 | 95.0°F (2017) | 37.0°F (2012) | 1.01 in (2006) |
| September 25 | 93.9°F (2017) | 35.1°F (2002) | 1.53 in (1933) |
| September 26 | 91.0°F (2017) | 41.0°F (2003) | 0.96 in (2005) |
| September 27 | 93.0°F (2017) | 42.1°F (2003) | 2.91 in (1981) |
| September 28 | 84.0°F (2025) | 43.0°F (2002) | 2.00 in (1927) |
| September 29 | 80.1°F (2015) | 36.0°F (2006) | 1.47 in (1945) |
| September 30 | 88.0°F (2002) | 36.0°F (2004) | 0.62 in (1986) |