White County Climate
White County, Illinois
Avg Annual Temp
55.0°F
Annual Precip
48.3"
Annual Snowfall
11.7"
Extreme Heat Days
37.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About White County Weather
Warm and remarkably wet
White County averages 55.0°F, placing it above the national median for annual temperature. Its high precipitation of 48.3 inches makes it one of the wettest spots in the Midwestern United States.
High ranking for heat and rain
The county's average temperature of 55.0°F sits comfortably above the state average of 52.8°F. Its rainfall total of 48.3 inches significantly exceeds the state average of 41.7 inches.
Wettest in the local region
White County's 48.3 inches of rain surpasses even Wayne County's high totals. While it shares the southern heat, it is slightly cooler than Wayne, with an average of 55.0°F.
Steamy summers and easy winters
The county experiences 38 days of extreme heat and a July average of 76.7°F. Winter remains mild with only 11.7 inches of snow, allowing for easier travel than in northern Illinois.
Manage moisture and summer sun
Sump pumps and gutter maintenance are vital to handle the 48.3 inches of annual rainfall. Residents should also plan for 38 days of 90-degree weather with reliable indoor cooling.
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.