Addison, Illinois, 3,856 students in 2 schools

DuPage High School District 88 Snow Day Predictor

Q: How much snow does Addison get?

About 32.2 inches a winter at a NOAA weather station 3.7 miles away, averaged over 10 winters. Between December 1 and March 31 that brings 2.7 weekday mornings a year with 2 inches of new snow or more, and 0.6 with 4 inches or more.

Q: What was the biggest snow day near DuPage?

8.4 inches on November 29, 2025, the largest single day at a NOAA weather station 3.7 miles away in 10 winters. The snowiest winter was 2018 to 2019, with 49.5 inches.

Q: Does DuPage get more snow days than other Illinois districts?

DuPage averages 0.6 weekday mornings a winter with 4 inches of new snow or more, more than 52 percent of the 788 Illinois districts with a station record.

Q: How does the DuPage snow day predictor work?

It reads the National Weather Service forecast for Addison through the night and the 5 to 8 am bus run, adds winter alerts and the Winter Storm Severity Index, and measures the snow against DuPage’s own big snow morning: 2.6 inches, the top tenth of snowy weekday mornings at a NOAA weather station 3.7 miles away.

The odds of a closing or a delay on the next three school mornings in DuPage, measured against DuPage's own big snow morning of 2.6 inches.

The next three school mornings

Will DuPage close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in Addison.

Ten winters of school mornings

DuPage’s snow record

32.2inches of snow a winter

2.7school mornings a winter with 2 in of new snow or more

0.6with 4 in or more

2.6 ina big snow morning in DuPage: the top tenth of snowy school mornings

3.6school mornings a winter at 0 F or colder

More 4 inch school mornings than 52% of the 788 Illinois districts with a station record.

3.3Nov

4.7Dec

10.9Jan

8.3Feb

2.7Mar

Average snowfall by month, inches

Biggest day 8.4 in on November 29, 2025
Snowiest winter 2018 to 2019, 49.5 in
6 in mornings 0.2 a winter
1 in mornings 6 a winter

Measured at a NOAA weather station 3.7 miles away. Mornings are the 7 am snow reading on a weekday from December 1 through March 31, over the ten winters from 2016 to 2017 through 2025 to 2026, from NOAA GHCN Daily.

The Illinois rule

How Illinois counts a lost day

Illinois requires a calendar of at least 185 days to guarantee 176 days of actual student attendance, each of at least 5 clock hours. The extra calendar days are emergency days used first; after they are gone, the State Superintendent may excuse days lost to an act of God or a hazard beyond the district's control without cutting state aid.

The Illinois rules in the agency’s own words, and every Illinois district

Next door

Districts near DuPage

District	Snow a winter	4 in mornings
Addison School District 4Addison	32.2 in	0.6
SD 45 DuPage CountyVilla Park	32.2 in	0.6
Elmhurst School District 205Elmhurst	32.2 in	0.6
Lombard School District 44Lombard	32.3 in	0.9
Glen Ellyn School District 41Glen Ellyn	32.3 in	0.9
Community Consolidated School District 59Elk Grove Vlg	30.9 in	0.7

The schools

2 schools

Every school in DuPage follows the district’s call: one closing covers them all.

High

Willowbrook High School, Villa Park
Addison Trail High School

Questions

DuPage snow day questions

How much snow does Addison get?

What was the biggest snow day near DuPage?

Does DuPage get more snow days than other Illinois districts?

How does the DuPage snow day predictor work?

How does Illinois handle snow days?

More winter

More for Illinois snow days

Snow day predictorClosing and delay odds for any ZIP, with the snowiest districts in the country.Snow depth mapHow much snow is on the ground right now, measured, across the country.First snow datesWhen the first measurable snow usually lands where you live.Frozen pipesThe nights cold enough to freeze a pipe, and what to do before one.Snow plow trackerWhere the plows are during a storm, city by city.Illinois winter forecastThe season ahead for Illinois: snowfall, cold and the first snow.

A residential street under deep snow on a bright blue morning, cars parked along the curb buried into smooth white mounds, one set of tire tracks down the middle — The morning after a big one: cars buried to the mirrors and one set of tracks down the middle. A street like this is a closing, no debate. Photo, Fairfax, Virginia, January 2016: Jarek Tuszyński, CC BY 4.0

The odds are a forecast read, and the superintendent makes the call: the district’s own announcement is the one to follow.