September weather in Yorkville, WI
The average temperature in Yorkville in September is 61.3°F (50.3°F–72.4°F). Average precipitation: 3.39 inches.
September is a fall month in Yorkville, and is warmer than the annual average of 46.4°F. Daily temperatures swing about 22.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
72.4°F
Avg Low
50.3°F
Precipitation
3.39 in
Daylight
12h 16m
September records in Yorkville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2000) | 41.0°F (2009) | 4.33 in (1989) |
| September 2 | 91.0°F (1999) | 39.9°F (2017) | 0.62 in (1961) |
| September 3 | 93.0°F (2008) | 39.9°F (1997) | 1.17 in (1970) |
| September 4 | 91.9°F (2023) | 42.1°F (2003) | 1.47 in (1991) |
| September 5 | 91.9°F (1999) | 42.1°F (2000) | 1.78 in (2008) |
| September 6 | 90.0°F (1998) | 42.1°F (2011) | 0.90 in (1970) |
| September 7 | 91.0°F (2005) | 39.9°F (2025) | 1.80 in (2001) |
| September 8 | 89.1°F (2002) | 37.9°F (2025) | 3.00 in (1941) |
| September 9 | 90.0°F (2002) | 42.1°F (2017) | 1.67 in (1985) |
| September 10 | 91.0°F (2005) | 39.0°F (2017) | 1.08 in (2019) |
| September 11 | 93.0°F (2013) | 39.0°F (2017) | 2.06 in (2000) |
| September 12 | 90.0°F (2005) | 42.1°F (2007) | 3.42 in (2022) |
| September 13 | 91.0°F (1998) | 37.9°F (2014) | 2.12 in (2019) |
| September 14 | 84.0°F (2004) | 36.0°F (2007) | 2.71 in (1961) |
| September 15 | 84.9°F (2004) | 35.1°F (2007) | 1.40 in (1970) |
| September 16 | 84.9°F (1997) | 37.0°F (2011) | 1.90 in (1997) |
| September 17 | 89.1°F (2024) | 37.9°F (2014) | 1.60 in (1992) |
| September 18 | 89.1°F (2018) | 42.1°F (1996) | 2.10 in (2015) |
| September 19 | 84.9°F (1998) | 32.0°F (2012) | 1.80 in (1997) |
| September 20 | 87.1°F (2016) | 36.0°F (2006) | 1.53 in (1963) |
| September 21 | 88.0°F (2005) | 36.0°F (1999) | 2.97 in (1947) |
| September 22 | 89.1°F (2024) | 37.9°F (1999) | 2.10 in (2000) |
| September 23 | 93.0°F (2017) | 37.0°F (2012) | 2.12 in (1986) |
| September 24 | 91.9°F (2017) | 30.9°F (2012) | 1.51 in (1970) |
| September 25 | 89.1°F (2017) | 37.0°F (1999) | 1.65 in (1986) |
| September 26 | 91.0°F (2017) | 37.9°F (2004) | 1.96 in (1993) |
| September 27 | 88.0°F (2017) | 37.0°F (2000) | 2.75 in (1999) |
| September 28 | 86.0°F (2025) | 35.1°F (2006) | 3.00 in (1945) |
| September 29 | 82.9°F (2013) | 30.9°F (2004) | 0.94 in (1986) |
| September 30 | 82.9°F (2002) | 28.0°F (2003) | 1.51 in (1948) |