Sangamon County Climate
Sangamon County, Illinois
Avg Annual Temp
53.5°F
Annual Precip
39.1"
Annual Snowfall
21.2"
Extreme Heat Days
25.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Sangamon County Weather
Warmer Than the National Average
Sangamon County maintains an annual average temperature of 53.5°F, placing it above the national median of 52.7°F. The local climate is characterized by moderate humidity and typical Midwestern seasonal shifts.
A Warm Spot in Central Illinois
The county's 53.5°F average exceeds the Illinois state average of 52.8°F. As the home of the state capital, it represents one of the warmer hubs in the central region of the state.
Outpacing the Neighbors in Heat
Sangamon is notably warmer than its western neighbor Schuyler County, which averages 51.7°F. It remains closely aligned with Shelby County's 53.3°F average to the southeast.
Hot Summers and Snowy Winters
Residents face 26 days of extreme heat above 90°F annually, particularly during July's 76.1°F average peak. Winter brings 21.2 inches of snow as temperatures drop to a January average of 27.5°F.
Prepare for Seasonal Extremes
Homeowners should prioritize efficient HVAC systems to manage the nearly month-long stretch of 90-degree days. Winter gear remains essential to handle the 21 inches of annual snowfall.
Frequently Asked Questions
What is the average temperature in Sangamon County?
How much rain does Sangamon County get?
Does it snow in Sangamon County?
How hot does Sangamon County get in summer?
How cold are winters in Sangamon County?
Track your own weather in Sangamon County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.