September weather in Cedarburg, WI
The average temperature in Cedarburg in September is 63.2°F (53.9°F–72.5°F). Average precipitation: 3.18 inches.
September is a fall month in Cedarburg, and is warmer than the annual average of 47.8°F. Daily temperatures swing about 18.6°F between overnight low and afternoon high. Daylight averages about 12h 17m. For travel, September is one of the best months of the year to visit.
Avg High
72.5°F
Avg Low
53.9°F
Precipitation
3.18 in
Daylight
12h 17m
September records in Cedarburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2010) | 46.9°F (2009) | 0.88 in (2010) |
| September 2 | 90.0°F (2015) | 46.9°F (2009) | 1.01 in (2018) |
| September 3 | 89.1°F (2015) | 45.0°F (2025) | 0.95 in (2018) |
| September 4 | 95.0°F (2023) | 45.0°F (2025) | 0.34 in (2018) |
| September 5 | 91.0°F (2023) | 45.0°F (2025) | 0.61 in (2012) |
| September 6 | 88.0°F (2016) | 45.0°F (2025) | 1.12 in (2018) |
| September 7 | 91.0°F (2015) | 44.1°F (2024) | 1.28 in (2016) |
| September 8 | 86.0°F (2015) | 46.0°F (2025) | 1.89 in (2016) |
| September 9 | 84.0°F (2022) | 46.9°F (2010) | 1.00 in (2015) |
| September 10 | 82.9°F (2013) | 46.9°F (2017) | 0.53 in (2019) |
| September 11 | 93.9°F (2013) | 46.9°F (2014) | 1.09 in (2022) |
| September 12 | 86.0°F (2021) | 44.1°F (2014) | 2.20 in (2022) |
| September 13 | 87.1°F (2012) | 41.0°F (2014) | 1.42 in (2019) |
| September 14 | 84.0°F (2009) | 41.0°F (2014) | 0.54 in (2021) |
| September 15 | 84.9°F (2009) | 39.0°F (2011) | 0.04 in (2013) |
| September 16 | 84.9°F (2015) | 42.1°F (2011) | 0.47 in (2013) |
| September 17 | 84.9°F (2015) | 42.1°F (2011) | 0.63 in (2023) |
| September 18 | 89.1°F (2018) | 45.0°F (2012) | 1.32 in (2015) |
| September 19 | 82.0°F (2022) | 35.1°F (2012) | 0.96 in (2011) |
| September 20 | 84.9°F (2016) | 44.1°F (2012) | 0.88 in (2016) |
| September 21 | 84.9°F (2024) | 43.0°F (2012) | 0.82 in (2017) |
| September 22 | 84.0°F (2010) | 41.0°F (2012) | 0.41 in (2024) |
| September 23 | 91.9°F (2017) | 37.9°F (2012) | 1.12 in (2009) |
| September 24 | 89.1°F (2017) | 37.0°F (2012) | 0.05 in (2022) |
| September 25 | 89.1°F (2017) | 46.0°F (2010) | 0.53 in (2011) |
| September 26 | 84.0°F (2017) | 42.1°F (2010) | 0.42 in (2018) |
| September 27 | 88.0°F (2017) | 39.9°F (2010) | 0.68 in (2023) |
| September 28 | 84.9°F (2025) | 39.0°F (2022) | 1.00 in (2009) |
| September 29 | 80.1°F (2015) | 37.9°F (2018) | 1.55 in (2015) |
| September 30 | 82.0°F (2014) | 36.0°F (2009) | 0.76 in (2011) |