Hamilton School District Snow Day Predictor

Q: When does Hamilton call a snow day?

Hamilton announces closings prior to 5:00 a.m, by its own published protocol.

Q: How does Hamilton announce a snow day?

By text message, phone call and email, and on the district’s own closings page.

Q: When is the last day of school for Hamilton?

June 8, 2027, on the district’s 2026 to 2027 calendar.

Q: How much snow does Sussex get?

About 40.4 inches a winter at a NOAA weather station 1.6 miles away, averaged over 7 winters. Between December 1 and March 31 that brings 3.7 weekday mornings a year with 2 inches of new snow or more, and 1.1 with 4 inches or more.

Q: What was the biggest snow day near Hamilton?

10.5 inches on November 30, 2025, the largest single day at a NOAA weather station 1.6 miles away in 7 winters. The snowiest winter was 2022 to 2023, with 54 inches.

Q: How does the Hamilton snow day predictor work?

It reads the National Weather Service forecast for Sussex 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 Hamilton’s own big snow morning: 3.2 inches, the top tenth of snowy weekday mornings at a NOAA weather station 1.6 miles away.

The next three school mornings

Will Hamilton close tomorrow?

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

The Hamilton playbook

How Hamilton calls a snow day

When the call comes

Prior to 5:00 a.m.

“A decision to close school must be made prior to 5:00 a.m. This provides adequate time to notify staff, families, Dairyland Bus Company and media outlets before morning travel begins.”

Source

How families hear

By text message, phone call and email.

“Decisions to close are communicated to families via a messaging system and can arrive in the form of text, phone call and/or email.”

Winter Weather Procedures

Making up a lost day

Made up at the end of the year, on June 9, 10 and 11, 2027.

“Days will be made up when schools are closed and could affect the following: June 9, June 10 and June 11.”

Source

The 2026 to 2027 calendar

First day September 1, 2026
Winter break Dec 23 to Jan 1
Last day June 8, 2027

District calendar

Read from Hamilton’s own pages on October 8, 2026; the district site is hamilton.k12.wi.us.

Ten winters of school mornings

Hamilton’s snow record

40.4inches of snow a winter

3.7school mornings a winter with 2 in of new snow or more

1.1with 4 in or more

3.2 ina big snow morning in Hamilton: the top tenth of snowy school mornings

3.5Nov

7.5Dec

11.9Jan

9.4Feb

5.7Mar

Average snowfall by month, inches

Biggest day 10.5 in on November 30, 2025
Snowiest winter 2022 to 2023, 54 in
6 in mornings 0.6 a winter
1 in mornings 7.3 a winter

Measured at a NOAA weather station 1.6 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 Wisconsin rule

How Wisconsin counts a lost day

Wisconsin requires hours, not days: 437 for kindergarten, 1,050 for grades 1 to 6 and 1,137 for grades 7 to 12.

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

Next door

Districts near Hamilton

District	Snow a winter	4 in mornings	Built in days
Elmbrook School DistrictBrookfield	34.3 in	1.2	2
Pewaukee School DistrictPewaukee	37.5 in	1.3
Menomonee Falls School DistrictMenomonee Falls	49.9 in	1.9
Germantown School DistrictGermantown	49.9 in	1.9
Wauwatosa School DistrictWauwatosa	42 in	1.9
Arrowhead Union High School DistrictHartland	36.2 in	1.5

The schools

8 schools

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

High

Hamilton High

Middle

Silver Spring Intermediate
Templeton Middle

Elementary

Marcy Elementary, Menomonee Falls
Woodside Elementary
Maple Avenue Elementary
Lannon Elementary, Lannon

Other schools

Willow Springs Learning Center, Menomonee Falls

Questions

Hamilton snow day questions

When does Hamilton call a snow day?

How does Hamilton announce a snow day?

When is the last day of school for Hamilton?

How much snow does Sussex get?

What was the biggest snow day near Hamilton?

How does the Hamilton snow day predictor work?

How does Wisconsin handle snow days?

More winter

More for Wisconsin 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.Wisconsin winter forecastThe season ahead for Wisconsin: 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.