Ottawa County Climate
Ottawa County, Michigan
Avg Annual Temp
48.1°F
Annual Precip
37.9"
Annual Snowfall
—
Extreme Heat Days
6.6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Ottawa County Weather
Temperate lakeside climate follows national patterns
Ottawa County averages 48.1°F annually, providing a more temperate experience than many other Michigan locations. It receives 37.9 inches of annual precipitation, which is slightly higher than the state average.
Warmer than the average Michigan county
At 48.1°F, the county is 2.4 degrees warmer than the statewide average of 45.7°F. Lake Michigan helps moderate the extreme cold found further inland or to the north.
Milder winters than neighboring central counties
Ottawa is warmer than Saginaw County, which sits at 47.7°F. The proximity to the lake provides a thermal buffer that keeps January averages at a relatively manageable 24.9°F.
Warm summers with consistent lake breezes
July temperatures average 70.8°F, and the county typically sees 7 days per year above 90°F. While specific snowfall data is unavailable, the winter average of 27.3°F reflects the moderating influence of the Great Lakes.
Prepare for humidity and lakeside moisture
The high annual precipitation of 37.9 inches suggests residents should invest in quality drainage and roof maintenance. Moderate summer heat makes air conditioning useful for about a week of extreme days, but lakeside breezes often provide natural cooling.
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.