Iron Mountain weather in September 2025

Expect 20°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Iron Mountain in September. Check more long-term weather averages for Iron Mountain in September before you book your next holiday to Michigan in 2025/2026.

  • 20°C maximum daytime temperature in September in Iron Mountain20
    20°C max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in September in Iron Mountain13
    13 days with some rainfall
  • 7°C minimum night-time temperature in September in Iron Mountain7
    7°C min night temperature
  • 12 hours of daylight per day in September in Iron Mountain12
    12 hours of daylight per day
  • No heat & humidity in September in Iron Mountain0
    No heat & humidity
  • 94 mm monthly rainfall in September in Iron Mountain94
    94 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Iron Mountain5
    5 (Moderate) UV index

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The September weather guide for Michigan (Iron Mountain) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Iron Mountain in September?

Daytime temperatures usually reach 20°C in Iron Mountain in September, falling to 7°C at night.

How sunny is it in Iron Mountain in September?

There are normally 6 hours of bright sunshine each day in Iron Mountain in September - that's 51% of daylight hours.

Does it rain in Iron Mountain in September?

There are usually 13 days with some rain in Iron Mountain in September and the average monthly rainfall is 94mm.

Iron Mountain September sunrise & sunset times

Browse the sunrise and sunset times for Iron Mountain in September 2025. Select a month to view Iron Mountain sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:14 18:30
Monday, 15th September 2025 05:31 18:03
Tuesday, 30th September 2025 05:50 17:34

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