Iron Mountain (MI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Iron Mountain.
Climate overview of Iron Mountain
Temperatures in Iron Mountain, Michigan, United States of America, vary greatly throughout the year. July is the hottest month at 27°C (81°F), while January is the coldest at -5°C (23°F).
With around 725 mm (29 in) of annual rain/snowfall, the city has moderate precipitation levels. June is the wettest month and February the driest. It also has a distinct dry season from January to March, with warm summers and very cold winters.
Iron Mountain Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Iron Mountain - and find the best time to visit.
Monthly Temperature in Iron Mountain
The climate in Iron Mountain is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -5°C (23°F) in the coolest month, January.
Nights vary from 13°C (55°F) in July to around -16°C (3°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Iron Mountain
Generally, Iron Mountain receives mid-range precipitation levels, with 725 mm (29 in) annually. The climate in Iron Mountain shows significant variation throughout the year. Expect moderate rainfall in June, the wettest month, with an average of 90 mm (3.5 in) of precipitation over 13 rainy days.
In contrast, the driest month February offers drier and sunnier days, with around 23 mm (0.9 in) of snowfall over 7 snowy days. For more details, please visit our Iron Mountain Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Iron Mountain
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Fewest rainy days: January, February, March and November
- Seasonal pattern: A distinct dry season from January to March, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -16°C (3°F).
Frequently asked questions about the climate in Iron Mountain
What is the best time to visit Iron Mountain?
June, July, August and September typically offer the most optimal weather in Iron Mountain. In contrast, January, February, March, November and December tend to have less optimal conditions. Iron Mountain has a distinct dry season from January to March, with warm summers and very cold winters.
What temperatures can I expect in Iron Mountain?
Daytime highs range from -5°C (23°F) in January to 27°C (81°F) in July. Nighttime lows range from -16°C (3°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Iron Mountain get?
Annual rainfall is around 725 mm (29 in). June is the wettest month with 90 mm (3.5 in), while February is the driest with 23 mm (0.9 in).
Iron Mountain 3-Day Forecast
Iron Mountain (MI) 3-Day Forecast
Iron Mountain on the map
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