Delta County Climate
Delta County, Michigan
Avg Annual Temp
42.5°F
Annual Precip
31.0"
Annual Snowfall
44.8"
Extreme Heat Days
2.8333333333333335
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Delta County Weather
A cold Upper Peninsula climate
Delta County averages 42.5°F annually, which is over 11 degrees colder than the national median. The proximity to Lake Michigan influences its weather, providing a distinct maritime-influenced continental climate.
Colder than the state average
The county's average temperature of 42.5°F falls well below the Michigan statewide average of 45.7°F. This gap highlights the significant climatic difference between the Upper and Lower Peninsulas.
Milder snow than western neighbors
Delta's 44.8 inches of snow is surprisingly lower than Dickinson County’s 61.0 inches to the west. However, both counties share similar sub-20°F winter averages that define the region.
Mild summers and steady freezes
Extreme heat is rare here, with only 3 days per year reaching 90°F. Winters are long and cold, with a January average of 17.2°F and roughly 45 inches of annual snow.
Winterize for the long haul
With a winter average of 19.8°F, residents must focus on home insulation and reliable heating sources. The low number of extreme heat days makes air conditioning less critical than in southern Michigan.
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.