Morgan County Climate
Morgan County, Illinois
Avg Annual Temp
52.8°F
Annual Precip
40.3"
Annual Snowfall
16.2"
Extreme Heat Days
31.65
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Morgan County Weather
The Perfect National Temperature Benchmark
Morgan County’s 52.8°F average annual temperature aligns almost perfectly with the national median for continental climates. Its 40.3 inches of annual rain provides a standard temperate moisture profile.
Mirroring the Illinois State Average
The county perfectly matches the Illinois state average temperature of 52.8°F. Its precipitation of 40.3 inches is slightly lower than the statewide average of 41.7 inches.
Drier and Cooler Than Montgomery
Morgan sees 10 fewer extreme heat days than Montgomery County to the south. It also receives about 2 inches less annual precipitation, making it a slightly more moderate neighbor.
Defined Winters and Hot Summers
January temperatures average 26.8°F, supporting 16.2 inches of annual snowfall across the winter months. Summers are warm, featuring a July average of 75.7°F and 32 days of extreme heat.
Ready Your Snow and Cooling Gear
Residents need both a reliable snow blower for the 16.2 inches of snow and efficient cooling for the 32 days of extreme heat. Multi-season wardrobe planning is essential in this balanced climate.
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.