September weather in Ypsilanti, MI
The average temperature in Ypsilanti in September is 62.4°F (49.7°F–75.1°F). Average precipitation: 2.98 inches.
September is a fall month in Ypsilanti, and is warmer than the annual average of 48.2°F. Daily temperatures swing about 25.4°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
75.1°F
Avg Low
49.7°F
Precipitation
2.98 in
Daylight
12h 16m
September records in Ypsilanti
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2012) | 42.1°F (2009) | 0.49 in (2003) |
| September 2 | 91.0°F (2010) | 42.1°F (2009) | 0.62 in (2018) |
| September 3 | 95.0°F (2011) | 44.1°F (2009) | 0.15 in (2010) |
| September 4 | 95.0°F (2011) | 45.0°F (2024) | 1.13 in (2018) |
| September 5 | 90.0°F (2018) | 42.1°F (2010) | 0.32 in (2012) |
| September 6 | 91.9°F (2014) | 42.1°F (2010) | 0.40 in (2018) |
| September 7 | 91.0°F (2016) | 42.1°F (2025) | 0.70 in (2004) |
| September 8 | 91.9°F (2016) | 39.9°F (2024) | 0.90 in (2011) |
| September 9 | 89.1°F (2015) | 39.0°F (2017) | 0.94 in (2020) |
| September 10 | 84.9°F (2022) | 39.0°F (2017) | 0.89 in (2016) |
| September 11 | 93.0°F (2013) | 39.9°F (2008) | 1.51 in (2014) |
| September 12 | 91.0°F (2013) | 43.0°F (2007) | 1.32 in (2019) |
| September 13 | 91.0°F (2005) | 41.0°F (2007) | 0.70 in (2006) |
| September 14 | 90.0°F (2005) | 36.0°F (2013) | 2.24 in (2008) |
| September 15 | 86.0°F (2021) | 36.0°F (2013) | 1.46 in (2008) |
| September 16 | 89.1°F (2018) | 34.0°F (2007) | 0.85 in (2005) |
| September 17 | 86.0°F (2018) | 34.0°F (2007) | 0.30 in (2010) |
| September 18 | 87.1°F (2018) | 36.0°F (2013) | 0.20 in (2016) |
| September 19 | 88.0°F (2018) | 32.0°F (2020) | 0.87 in (2015) |
| September 20 | 87.1°F (2007) | 32.0°F (2020) | 0.52 in (2013) |
| September 21 | 86.0°F (2019) | 36.0°F (2006) | 0.84 in (2014) |
| September 22 | 91.9°F (2017) | 37.0°F (2006) | 2.86 in (2021) |
| September 23 | 91.9°F (2017) | 39.0°F (2013) | 1.67 in (2021) |
| September 24 | 91.9°F (2017) | 34.0°F (2012) | 0.38 in (2025) |
| September 25 | 91.0°F (2007) | 35.1°F (2012) | 0.78 in (2003) |
| September 26 | 91.0°F (2017) | 37.0°F (2003) | 0.91 in (2018) |
| September 27 | 91.0°F (2017) | 37.9°F (2006) | 0.50 in (2003) |
| September 28 | 84.9°F (2025) | 41.0°F (2018) | 1.12 in (2023) |
| September 29 | 80.1°F (2014) | 33.1°F (2006) | 1.84 in (2016) |
| September 30 | 82.0°F (2025) | 33.1°F (2006) | 0.94 in (2016) |