Cass County Climate
Cass County, Illinois
Climate data coming soon
Avg Annual Temp
—
Annual Precip
38.2"
Annual Snowfall
15.6"
Extreme Heat Days
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Monthly Temperature
Temperature data coming soon
Precipitation Calendar
Seasonal Overview
Seasonal data coming soon
National Comparison
Data pending
Data pending
Climate Profile
About Cass County Weather
Drier and Seasonal Continental Climate
Cass County receives 38.2 inches of annual precipitation, placing it below the national average for its climate type. It experiences the standard seasonal swings of the Midwest, though with slightly less total moisture.
Less Rain and Snow than Average
Cass is drier than the state average, receiving 38.2 inches of rain compared to Illinois' 41.7-inch mark. Its snowfall of 15.6 inches is also significantly lower than the averages seen in the northern half of the state.
Milder Winters than Bureau
With only 15.6 inches of annual snow, Cass County avoids the heavy 32.2-inch accumulations seen in Bureau County. It has a similar precipitation profile to Adams County, highlighting a drier trend in central Illinois.
Moderate Snow and Dry Spells
Winter is relatively manageable with 15.6 inches of snow. Though specific temperature records are unavailable, the 38.2 inches of rain suggests residents should prepare for occasional dry periods in the summer.
Monitor Moisture Levels
Since the 38.2 inches of rain is below the state average, summer irrigation may be necessary for landscaping. Basic winter prep is sufficient for the 15.6 inches of snow, which typically doesn't require heavy machinery.
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.