Illinois Snow Day Calculator
Will Your School Close Due to Snow?
Instant snow day predictions for schools across Illinois
Illinois School Closure Prediction Tool
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Illinois Snow Day Forecast Results
Illinois ZIP Code Coverage
Chicago Metropolitan Area
Northern Illinois
Central Illinois
Southern Illinois
For accurate Illinois Snow Day Calculator predictions, please enter a ZIP code from your specific region as conditions vary significantly between northern and southern regions
Illinois Snow Statistics & Information
Geographic Features
- •Lake Michigan Shoreline
- •Illinois River
- •Mississippi River
- •Shawnee Hills
- •Prairie Lands
Snow Statistics
Annual Average Snowfall
28 inches
Snow Days per Year
40 days
School Information
Average Snow Days
4 days/year
School Districts
852
Illinois Historical Snow Events
Chicago Blizzard of 1967
1967-01-26Snowfall: 29 inches
Record snowfall in Chicago, city paralyzed for days
Groundhog Day Blizzard
2011-02-01Snowfall: 21.2 inches
Third-largest snowfall in Chicago history, widespread school closures
Polar Vortex of 2019
2019-01-30Snowfall: 15 inches
Schools closed statewide due to dangerous wind chills below -50°F
Illinois Snow Facts
The Chicago Blizzard of 1967 remains the city's record single-day snowfall at 29 inches
Illinois has experienced temperatures as low as -36°F, recorded in Congerville on January 5, 1999
The Lake Michigan effect can cause dramatic differences in snowfall between Chicago's north and south sides
Illinois was one of the pioneers in implementing e-learning days during severe weather
The state's snowiest winter was 1978-1979 when Chicago received 89.7 inches of snow
Illinois Department of Transportation maintains over 16,000 miles of roads during winter storms