Delta County Climate
Delta County, Michigan
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
42.5°F
Annual Precip
31.0"
Annual Snowfall
44.8"
Extreme Heat Days
3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
1,793
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Delta County
Climate Verdict
Delta County has a cool, averaging 42.5°F annually, moderate rainfall of 31.0 inches per year, rare extreme heat with only 2.8333333333333335 days above 90°F annually, moderate snowfall of 44.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 17.2°F. summers are pleasantly cool with July averaging 67.0°F. The 50°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Delta County is 3.2°F cooler than the Michigan statewide average of 45.7°F, it is somewhat drier than average for Michigan.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.