Clarendon Hills, Illinois, 3,564 students in 9 schools

Hinsdale Community Consolidated School District 181 Snow Day Predictor

Q: How much snow does Clarendon Hills get?

About 28 inches a winter at a NOAA weather station 3.9 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 0.5 with 4 inches or more.

Q: What was the biggest snow day near Hinsdale 181?

8.7 inches on November 30, 2025, the largest single day at a NOAA weather station 3.9 miles away in 10 winters. The snowiest winter was 2020 to 2021, with 41.8 inches.

Q: How does the Hinsdale 181 snow day predictor work?

It reads the National Weather Service forecast for Clarendon Hills 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 Hinsdale 181’s own big snow morning: 3 inches, the top tenth of snowy weekday mornings at a NOAA weather station 3.9 miles away.

Q: Can Illinois schools hold a remote day instead?

A district with a board adopted e-learning program, verified each year by its regional office, can use e-learning days in place of its emergency days, and they count as full attendance days; they cannot exceed the emergency days in the calendar.

The odds of a closing or a delay on the next three school mornings in Hinsdale 181, measured against Hinsdale 181's own big snow morning of 3 inches.

The next three school mornings

Will Hinsdale 181 close tomorrow?

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

Ten winters of school mornings

Hinsdale 181’s snow record

28inches of snow a winter

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

0.5with 4 in or more

3 ina big snow morning in Hinsdale 181: the top tenth of snowy school mornings

3Nov

4.1Dec

9.6Jan

8Feb

2Mar

Average snowfall by month, inches

Biggest day 8.7 in on November 30, 2025
Snowiest winter 2020 to 2021, 41.8 in
6 in mornings 0.2 a winter
1 in mornings 5.3 a winter

Measured at a NOAA weather station 3.9 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 Hinsdale 181

District	Snow a winter	4 in mornings
Hinsdale Township High School District 86Hinsdale	27.5 in	0.5
Community High School District 99Downers Grove	28.9 in	0.6
Lyons Township High School District 204La Grange	27.5 in	0.5
Downers Grove Grade School District 58Downers Grove	22.9 in	0.5
Lombard School District 44Lombard	32.3 in	0.9
Elmhurst School District 205Elmhurst	32.2 in	0.6

The schools

9 schools

Every school in Hinsdale 181 follows the district’s call: one closing covers them all.

Middle

Hinsdale Middle School, Hinsdale
Clarendon Hills Middle School

Elementary

Oak Elem School, Hinsdale
Madison Elem School, Hinsdale
The Lane Elem School, Hinsdale
Prospect Elem School
Monroe Elem School, Hinsdale
Elm Elem School, Burr Ridge
Walker School

Questions

Hinsdale 181 snow day questions

How much snow does Clarendon Hills get?

What was the biggest snow day near Hinsdale 181?

How does the Hinsdale 181 snow day predictor work?

How does Illinois handle snow days?

Can Illinois schools hold a remote day instead?

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.