September weather in Ironwood, MI
The average temperature in Ironwood in September is 56.6°F (45.6°F–67.6°F). Average precipitation: inches.
September is a fall month in Ironwood, and is warmer than the annual average of 40.2°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
67.6°F
Avg Low
45.6°F
Precipitation
in
Daylight
12h 19m
September records in Ironwood
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 75.0°F (2022) | 39.9°F (2021) | 0.00 in (2019) |
| September 2 | 84.0°F (2022) | 41.0°F (2021) | 0.00 in (2019) |
| September 3 | 82.9°F (2022) | 46.9°F (2024) | 0.66 in (2019) |
| September 4 | 73.0°F (2024) | 37.9°F (2022) | 0.44 in (2019) |
| September 5 | 78.1°F (2024) | 37.0°F (2022) | 1.09 in (2025) |
| September 6 | 86.0°F (2023) | 39.0°F (2025) | 1.55 in (2023) |
| September 7 | 75.9°F (2022) | 37.9°F (2024) | 0.62 in (2021) |
| September 8 | 80.1°F (2022) | 34.0°F (2020) | 0.19 in (2021) |
| September 9 | 81.0°F (2022) | 35.1°F (2020) | 0.87 in (2025) |
| September 10 | 79.0°F (2024) | 34.0°F (2020) | 0.43 in (2025) |
| September 11 | 80.1°F (2024) | 33.1°F (2020) | 0.02 in (2025) |
| September 12 | 80.1°F (2024) | 33.1°F (2020) | 0.13 in (2020) |
| September 13 | 84.0°F (2024) | 37.9°F (2023) | 0.74 in (2020) |
| September 14 | 82.0°F (2024) | 35.1°F (2020) | 0.68 in (2021) |
| September 15 | 80.1°F (2025) | 36.0°F (2020) | 0.42 in (2023) |
| September 16 | 84.0°F (2025) | 42.1°F (2021) | 0.42 in (2023) |
| September 17 | 84.0°F (2024) | 35.1°F (2020) | 1.10 in (2021) |
| September 18 | 82.9°F (2024) | 27.0°F (2020) | 0.00 in (2019) |
| September 19 | 82.9°F (2024) | 27.0°F (2020) | 0.47 in (2025) |
| September 20 | 84.0°F (2021) | 27.0°F (2020) | 0.00 in (2019) |
| September 21 | 79.0°F (2019) | 46.0°F (2024) | 0.88 in (2021) |
| September 22 | 82.0°F (2023) | 37.9°F (2021) | 0.33 in (2019) |
| September 23 | 78.1°F (2023) | 32.0°F (2022) | 0.42 in (2025) |
| September 24 | 80.1°F (2020) | 35.1°F (2024) | 0.66 in (2020) |
| September 25 | 78.1°F (2019) | 42.1°F (2021) | 0.63 in (2019) |
| September 26 | 75.9°F (2025) | 41.0°F (2021) | 0.78 in (2020) |
| September 27 | 81.0°F (2024) | 42.1°F (2019) | 0.34 in (2020) |
| September 28 | 82.0°F (2024) | 27.0°F (2022) | 0.09 in (2019) |
| September 29 | 80.1°F (2024) | 28.0°F (2022) | 0.19 in (2020) |
| September 30 | 84.0°F (2025) | 36.0°F (2022) | 0.71 in (2019) |