September weather in Mahtomedi, MN
The average temperature in Mahtomedi in September is 60.9°F (51.2°F–70.7°F). Average precipitation: 3.32 inches.
September is a fall month in Mahtomedi, and is warmer than the annual average of 44.3°F. Daily temperatures swing about 19.5°F between overnight low and afternoon high. Daylight averages about 12h 18m. For travel, September is one of the best months of the year to visit.
Avg High
70.7°F
Avg Low
51.2°F
Precipitation
3.32 in
Daylight
12h 18m
September records in Mahtomedi
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 86.0°F (2022) | 46.0°F (2009) | 0.59 in (2014) |
| September 2 | 88.0°F (2011) | 48.0°F (2009) | 1.33 in (2010) |
| September 3 | 88.0°F (2023) | 48.9°F (2013) | 1.33 in (2019) |
| September 4 | 96.1°F (2023) | 45.0°F (2025) | 0.93 in (2006) |
| September 5 | 96.1°F (2023) | 45.0°F (2025) | 0.71 in (2016) |
| September 6 | 90.0°F (2023) | 46.0°F (2025) | 1.18 in (2016) |
| September 7 | 88.0°F (2013) | 44.1°F (2024) | 0.47 in (2007) |
| September 8 | 89.1°F (2013) | 45.0°F (2020) | 0.14 in (2020) |
| September 9 | 82.9°F (2022) | 41.0°F (2008) | 0.10 in (2016) |
| September 10 | 91.0°F (2013) | 37.0°F (2020) | 0.54 in (2014) |
| September 11 | 82.0°F (2011) | 37.9°F (2020) | 0.64 in (2019) |
| September 12 | 93.0°F (2012) | 37.9°F (2007) | 1.27 in (2019) |
| September 13 | 87.1°F (2011) | 37.0°F (2014) | 0.37 in (2019) |
| September 14 | 84.0°F (2017) | 39.0°F (2014) | 0.20 in (2021) |
| September 15 | 86.0°F (2017) | 33.1°F (2007) | 0.65 in (2013) |
| September 16 | 90.0°F (2018) | 33.1°F (2007) | 1.43 in (2016) |
| September 17 | 89.1°F (2025) | 42.1°F (2014) | 0.27 in (2012) |
| September 18 | 86.0°F (2024) | 37.0°F (2020) | 0.82 in (2015) |
| September 19 | 82.9°F (2024) | 37.9°F (2020) | 1.44 in (2007) |
| September 20 | 87.1°F (2021) | 39.0°F (2006) | 0.22 in (2013) |
| September 21 | 84.9°F (2022) | 39.0°F (2006) | 2.06 in (2018) |
| September 22 | 82.9°F (2023) | 37.9°F (2012) | 2.16 in (2016) |
| September 23 | 91.0°F (2017) | 36.0°F (2012) | 1.11 in (2010) |
| September 24 | 86.0°F (2017) | 36.0°F (2012) | 2.20 in (2023) |
| September 25 | 88.0°F (2017) | 39.0°F (2011) | 0.29 in (2023) |
| September 26 | 82.0°F (2020) | 37.0°F (2010) | 1.34 in (2023) |
| September 27 | 82.9°F (2008) | 35.1°F (2012) | 0.35 in (2006) |
| September 28 | 81.0°F (2013) | 34.0°F (2022) | 0.19 in (2011) |
| September 29 | 81.0°F (2024) | 33.1°F (2018) | 0.89 in (2023) |
| September 30 | 84.9°F (2025) | 36.0°F (2009) | 0.65 in (2007) |