Iosco County Climate
Iosco County, Michigan
Avg Annual Temp
45.0°F
Annual Precip
32.5"
Annual Snowfall
49.2"
Extreme Heat Days
5.85
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Iosco County Weather
Iosco stays cooler than the national average
Iosco County maintains an average annual temperature of 45.0°F, significantly lower than the national median. This northern Michigan climate offers a crisp alternative to warmer regions across the country.
Typical Michigan weather on the Huron shore
The county's 45.0°F average sits just below the Michigan state average of 45.7°F. It represents the transition point between the warmer southern mainland and the colder northern woods.
Drier and cooler than its state peers
With 32.5 inches of annual precipitation, Iosco is slightly drier than the state average of 34.5 inches. Its lakeside location helps moderate July highs to a comfortable 69.0°F.
Mild summers met by snowy winter months
Residents enjoy a gentle summer with only 6 days reaching 90°F or higher. However, winter brings 49.2 inches of snowfall and average temperatures of just 22.8°F.
Prepare for snow and moderate cooling needs
Reliable snow removal equipment is essential for handling nearly 50 inches of annual accumulation. While summers are mild, standard HVAC systems help manage the few humid weeks when temperatures peak.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.