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May Weather in Iron River, United States

Last updated: August 27, 2025

In May, the average temperature in Iron River, United States hovers around 12°C (55°F). Expect temperatures to range from a chilly -3°C (28°F) to a warm 33°C (92°F). During this month, you can anticipate 98 mm (3.8 in) of precipitation over about 10 days, contributing to an average humidity level of 76%.

May Temperature in Iron River

In May in Iron River, the average temperature is 12°C (55°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as -3°C (28°F). Be prepared for a range of weather conditions during your travels, from warm days to cool nights.

May Weather in Iron River: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Iron River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iron River, May typically has an average temperature of 12°C (55°F), with highs reaching up to 33°C (92°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec141428395466706760453020
Data source: Temperature data for Iron River generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Iron River

In Iron River in May, the precipitation amount is 98 mm (3.8 in) spread over a period of 10 days.

May Precipitation Trends in Iron River

The chart displays monthly precipitation patterns in Iron River, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Iron River, May typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec283846849892111101991024966
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Iron River

In Iron River in May humidity is 76%. With an average temperature of 12°C (55°F), this humidity feels like a damp embrace, making traveling somewhat uncomfortable as the air clings to your skin and can leave you feeling cooler than expected.

May Average Humidity in Iron River

This chart illustrates the average monthly humidity levels in Iron River, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Iron River is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%89%85%76%71%70%71%73%82%88%91%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Iron River

In Iron River in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Iron River.

Maximum UV Index Levels in Iron River for May

The chart shows the monthly maximum UV Index (UVI) for Iron River in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Iron River typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810987532
Data source: Iron River May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How May Weather in Iron River Compares to Other Months

Weather in Iron River varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Iron River, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Iron River, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)28 mm (1.1 inches)93%low
February Weather-10°C (14°F)38 mm (1.5 inches)93%moderate
March Weather-2°C (29°F)46 mm (1.8 inches)89%moderate
April Weather4°C (39°F)84 mm (3.3 inches)85%high
May Weather12°C (55°F)98 mm (3.8 inches)76%very high
June Weather19°C (66°F)92 mm (3.6 inches)71%very high
July Weather21°C (70°F)111 mm (4.4 inches)70%very high
August Weather19°C (67°F)101 mm (4.0 inches)71%very high
September Weather15°C (60°F)99 mm (3.9 inches)73%high
October Weather7°C (45°F)102 mm (4.0 inches)81%moderate
November Weather-1°C (30°F)49 mm (1.9 inches)87%moderate
December Weather-6°C (21°F)66 mm (2.6 inches)91%low

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