Troy, Illinois, 4,005 students in 6 schools

Triad Community Unit School District 2 Snow Day Predictor

Q: How much snow does Troy get?

About 12.4 inches a winter at a NOAA weather station 3.2 miles away, averaged over 7 winters. Between December 1 and March 31 that brings 1 weekday mornings a year with 2 inches of new snow or more, and 0.4 with 4 inches or more.

Q: What was the biggest snow day near Triad?

6.8 inches on January 25, 2026, the largest single day at a NOAA weather station 3.2 miles away in 7 winters. The snowiest winter was 2024 to 2025, with 16.4 inches.

Q: How does the Triad snow day predictor work?

It reads the National Weather Service forecast for Troy 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 Triad’s own big snow morning: 2.2 inches, the top tenth of snowy weekday mornings at a NOAA weather station 3.2 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 Triad, measured against Triad's own big snow morning of 2.2 inches.

The next three school mornings

Will Triad close tomorrow?

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

Ten winters of school mornings

Triad’s snow record

12.4inches of snow a winter

1school mornings a winter with 2 in of new snow or more

0.4with 4 in or more

2.2 ina big snow morning in Triad: the top tenth of snowy school mornings

1.4Nov

2.3Dec

4.4Jan

4.1Feb

0.1Mar

Average snowfall by month, inches

Biggest day 6.8 in on January 25, 2026
Snowiest winter 2024 to 2025, 16.4 in
6 in mornings 0 a winter
1 in mornings 2.9 a winter

Measured at a NOAA weather station 3.2 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 Triad

District	Snow a winter	4 in mornings
Edwardsville Community Unit School District 7Edwardsville	13.1 in	0.4
Collinsville Community Unit School District 10Collinsville	12.5 in	0.3
O'Fallon Community Consolidated School District 90O Fallon	12.5 in	0.3
Granite City Community Unit School District 9Granite City	13.1 in	0.4
Belleville Township High School District 201Belleville	12.5 in	0.3
Belleville School District 118Belleville	12.5 in	0.3

The schools

6 schools

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

High

Triad High School

Middle

Triad Middle School, Saint Jacob

Elementary

Silver Creek Elementary
C A Henning School
St Jacob Elem School, Saint Jacob
Marine Elem School, Marine

Questions

Triad snow day questions

How much snow does Troy get?

What was the biggest snow day near Triad?

How does the Triad 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.