September weather in Ironton, MN
The average temperature in Ironton in September is 58.7°F (46.9°F–70.5°F). Average precipitation: 2.60 inches.
September is a fall month in Ironton, and is warmer than the annual average of 42.2°F. Daily temperatures swing about 23.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
70.5°F
Avg Low
46.9°F
Precipitation
2.60 in
Daylight
12h 19m
September records in Ironton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2008) | 45.0°F (2003) | 0.70 in (2002) |
| September 2 | 91.9°F (2023) | 41.0°F (1998) | 0.80 in (2025) |
| September 3 | 102.0°F (2023) | 39.0°F (1997) | 0.45 in (1999) |
| September 4 | 97.0°F (2023) | 39.9°F (2003) | 1.73 in (2014) |
| September 5 | 93.0°F (2007) | 41.0°F (2010) | 3.62 in (2004) |
| September 6 | 93.9°F (2013) | 37.0°F (2025) | 0.53 in (2010) |
| September 7 | 91.9°F (2003) | 34.0°F (2025) | 0.92 in (2016) |
| September 8 | 90.0°F (2002) | 34.0°F (2020) | 0.67 in (2013) |
| September 9 | 88.0°F (2011) | 32.0°F (2020) | 1.43 in (2013) |
| September 10 | 88.0°F (2005) | 30.2°F (2020) | 0.61 in (2003) |
| September 11 | 88.0°F (2011) | 34.0°F (2020) | 0.65 in (1999) |
| September 12 | 87.1°F (2011) | 31.1°F (2007) | 1.62 in (2005) |
| September 13 | 84.9°F (2024) | 30.2°F (2014) | 1.33 in (1998) |
| September 14 | 84.9°F (2017) | 28.9°F (1996) | 1.02 in (2013) |
| September 15 | 84.9°F (2018) | 27.1°F (2011) | 1.25 in (2004) |
| September 16 | 89.1°F (2018) | 32.0°F (2011) | 0.97 in (2016) |
| September 17 | 87.1°F (2019) | 32.0°F (2020) | 1.42 in (2007) |
| September 18 | 87.1°F (1998) | 33.1°F (2012) | 0.56 in (2019) |
| September 19 | 88.0°F (2021) | 36.0°F (2003) | 0.44 in (2024) |
| September 20 | 84.0°F (2022) | 32.0°F (1999) | 1.63 in (2021) |
| September 21 | 82.9°F (2023) | 28.9°F (1999) | 0.34 in (2006) |
| September 22 | 84.0°F (2017) | 30.9°F (1998) | 1.31 in (2017) |
| September 23 | 84.9°F (2007) | 26.2°F (2012) | 0.92 in (2022) |
| September 24 | 82.0°F (2017) | 25.0°F (2000) | 0.69 in (2007) |
| September 25 | 82.0°F (2025) | 28.0°F (2001) | 0.98 in (1999) |
| September 26 | 89.1°F (1998) | 30.0°F (2001) | 0.59 in (2007) |
| September 27 | 82.0°F (1998) | 29.1°F (2012) | 0.20 in (2006) |
| September 28 | 88.0°F (1998) | 29.1°F (2022) | 0.55 in (2013) |
| September 29 | 87.1°F (2025) | 28.2°F (2018) | 1.01 in (2023) |
| September 30 | 82.9°F (2021) | 31.1°F (2009) | 2.19 in (2019) |