September weather in Port Austin, MI
The average temperature in Port Austin in September is 61.0°F (51.5°F–70.5°F). Average precipitation: 3.11 inches.
September is a fall month in Port Austin, and is warmer than the annual average of 45.9°F. Daily temperatures swing about 19°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
70.5°F
Avg Low
51.5°F
Precipitation
3.11 in
Daylight
12h 17m
September records in Port Austin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (2010) | 42.1°F (2009) | 0.27 in (2011) |
| September 2 | 87.1°F (2010) | 39.9°F (2017) | 0.41 in (2014) |
| September 3 | 91.9°F (2011) | 46.0°F (2024) | 0.50 in (2010) |
| September 4 | 82.9°F (2020) | 48.0°F (2009) | 1.87 in (2015) |
| September 5 | 82.9°F (2014) | 48.9°F (2003) | 1.10 in (2017) |
| September 6 | 90.0°F (2007) | 43.0°F (2013) | 0.52 in (2014) |
| September 7 | 89.1°F (2016) | 44.1°F (2025) | 1.56 in (2024) |
| September 8 | 87.1°F (2005) | 39.9°F (2025) | 2.90 in (2021) |
| September 9 | 87.1°F (2002) | 39.9°F (2025) | 0.57 in (2015) |
| September 10 | 89.1°F (2002) | 43.0°F (2008) | 0.60 in (2001) |
| September 11 | 93.0°F (2013) | 45.0°F (2008) | 1.27 in (2007) |
| September 12 | 88.0°F (2005) | 46.0°F (2009) | 0.94 in (2006) |
| September 13 | 89.1°F (2005) | 45.0°F (2009) | 0.95 in (2014) |
| September 14 | 90.0°F (2005) | 39.0°F (2014) | 0.77 in (2008) |
| September 15 | 86.0°F (2003) | 41.0°F (2020) | 2.00 in (2008) |
| September 16 | 84.9°F (2024) | 37.9°F (2007) | 0.69 in (2003) |
| September 17 | 82.9°F (2024) | 34.0°F (2013) | 0.96 in (2010) |
| September 18 | 84.0°F (2017) | 35.1°F (2013) | 0.34 in (2016) |
| September 19 | 82.9°F (2007) | 34.0°F (2014) | 0.92 in (2001) |
| September 20 | 84.0°F (2007) | 34.0°F (2014) | 0.44 in (2013) |
| September 21 | 82.0°F (2016) | 41.0°F (2006) | 0.82 in (2008) |
| September 22 | 87.1°F (2005) | 42.1°F (2020) | 0.65 in (2025) |
| September 23 | 84.0°F (2004) | 43.0°F (2002) | 2.01 in (2003) |
| September 24 | 86.0°F (2004) | 37.0°F (2013) | 0.83 in (2001) |
| September 25 | 88.0°F (2007) | 34.0°F (2002) | 0.85 in (2025) |
| September 26 | 84.0°F (2007) | 39.9°F (2013) | 4.03 in (2005) |
| September 27 | 84.9°F (2017) | 39.9°F (2012) | 0.53 in (2011) |
| September 28 | 77.0°F (2020) | 36.0°F (2006) | 1.20 in (2022) |
| September 29 | 77.0°F (2013) | 42.1°F (2002) | 0.51 in (2005) |
| September 30 | 75.9°F (2014) | 37.9°F (2022) | 0.95 in (2014) |