Hillsdale County Climate
Hillsdale County, Michigan
Avg Annual Temp
47.9°F
Annual Precip
39.5"
Annual Snowfall
44.1"
Extreme Heat Days
9.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Hillsdale County Weather
Southern Michigan's Mildest Tier
Hillsdale County’s annual average temperature of 47.9°F is warmer than many northern peers but still trails the national median. It experiences a humid continental climate typical of the southern Great Lakes border region.
Among Michigan's Warmer Counties
Hillsdale is significantly warmer than the state average of 45.7°F, reflecting its position on the southern state line. It also receives more annual precipitation at 39.5 inches compared to the Michigan average of 34.5 inches.
Damp and Moderate Conditions
With 39.5 inches of precipitation, Hillsdale is wetter than many of its central Michigan neighbors. Its 44.1 inches of annual snowfall is typical for the southern tier, where lake-effect impact is reduced.
Extended Summer and Gentle Winters
July averages a warm 71.2°F with 9 days of extreme heat exceeding 90°F. Winters are relatively mild by Michigan standards, with January temperatures averaging 22.8°F.
Focus on Moisture and Heat
Given the 39.5 inches of precipitation, ensuring proper basement drainage and gutter maintenance is vital for residents. Efficient cooling systems are recommended to handle the warm 71°F summers and 9 extreme heat days.
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.