Cass County Climate
Cass County, Michigan
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.1°F
Annual Precip
41.7"
Annual Snowfall
—
Extreme Heat Days
11
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,634
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Cass County
Climate Verdict
Cass County has a cool, averaging 48.1°F annually, moderately wet with 41.7 inches of annual precipitation, rare extreme heat with only 11.2 days above 90°F annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.7°F. summers are warm — July averages 70.8°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Cass County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Cass County closely matches the Michigan statewide average temperature of 45.7°F, it is also noticeably wetter, receiving 7.4 inches more precipitation than the state average.
Climate Profile
About Cass County Weather
Wetter and Warmer Southern Michigan Living
Cass County averages 48.1°F annually, which is roughly 7 degrees cooler than the national median. It is characterized by significant annual moisture and a southern latitude that softens the winter.
High Precipitation in the Southern Tier
The county's 41.7 inches of annual precipitation far exceeds the state average of 34.5 inches. Despite the rain, it remains warmer than the Michigan average, recording 48.1°F annually.
Leading the Region in Rainfall
Cass is one of the wettest counties in the area, receiving nearly 7 inches more precipitation than the Michigan average. While specific snowfall data is limited for this county, the high total precipitation suggests wet winters.
Humid Summers and Frequent Heat
July averages 70.8°F and the county endures 11 days of extreme heat above 90°F each year. Winter remains fairly typical for the southern border with a 26.3°F average.
Manage Water and Summer Humidity
Given the high 41.7 inches of rain, residents must focus on sump pumps and landscape grading. Cooling systems are essential to navigate the 11 days of extreme summer heat.
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.