September weather in Munising, MI
The average temperature in Munising in September is 58.2°F (49.1°F–67.4°F). Average precipitation: 3.85 inches.
September is a fall month in Munising, and is warmer than the annual average of 42.2°F. Daily temperatures swing about 18.3°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
67.4°F
Avg Low
49.1°F
Precipitation
3.85 in
Daylight
12h 19m
September records in Munising
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2008) | 37.0°F (2017) | 2.31 in (2010) |
| September 2 | 90.0°F (2008) | 45.0°F (2019) | 0.55 in (2017) |
| September 3 | 89.1°F (2023) | 46.0°F (2019) | 1.24 in (2012) |
| September 4 | 91.9°F (2023) | 39.9°F (2025) | 1.69 in (2007) |
| September 5 | 91.0°F (2007) | 39.0°F (2011) | 3.45 in (2018) |
| September 6 | 88.0°F (2007) | 34.0°F (2011) | 1.35 in (2016) |
| September 7 | 81.0°F (2006) | 39.9°F (2018) | 0.67 in (2010) |
| September 8 | 82.0°F (2022) | 39.9°F (2020) | 0.62 in (2015) |
| September 9 | 84.9°F (2022) | 37.0°F (2006) | 1.26 in (2025) |
| September 10 | 84.0°F (2013) | 37.0°F (2006) | 1.82 in (2014) |
| September 11 | 91.0°F (2005) | 39.9°F (2020) | 0.40 in (2007) |
| September 12 | 88.0°F (2005) | 39.0°F (2014) | 0.63 in (2020) |
| September 13 | 82.0°F (2017) | 39.0°F (2015) | 1.13 in (2019) |
| September 14 | 84.0°F (2018) | 39.9°F (2006) | 0.95 in (2011) |
| September 15 | 87.1°F (2024) | 37.9°F (2011) | 0.55 in (2010) |
| September 16 | 87.1°F (2024) | 34.0°F (2011) | 1.14 in (2016) |
| September 17 | 84.9°F (2024) | 35.1°F (2020) | 0.66 in (2012) |
| September 18 | 82.0°F (2024) | 31.1°F (2020) | 0.17 in (2012) |
| September 19 | 81.0°F (2024) | 34.0°F (2009) | 1.15 in (2005) |
| September 20 | 80.1°F (2021) | 34.0°F (2010) | 0.44 in (2013) |
| September 21 | 82.0°F (2019) | 37.0°F (2008) | 0.85 in (2007) |
| September 22 | 86.0°F (2017) | 36.0°F (2014) | 0.76 in (2012) |
| September 23 | 89.1°F (2017) | 34.0°F (2022) | 1.27 in (2010) |
| September 24 | 89.1°F (2017) | 37.9°F (2012) | 1.02 in (2021) |
| September 25 | 82.9°F (2017) | 35.1°F (2012) | 0.45 in (2018) |
| September 26 | 80.1°F (2014) | 36.0°F (2010) | 1.02 in (2020) |
| September 27 | 81.0°F (2014) | 33.1°F (2012) | 0.52 in (2011) |
| September 28 | 82.0°F (2014) | 34.0°F (2022) | 1.45 in (2005) |
| September 29 | 80.1°F (2025) | 32.0°F (2006) | 1.95 in (2011) |
| September 30 | 78.1°F (2024) | 34.0°F (2009) | 1.69 in (2019) |