Wisconsin Snow Day Calculator: Chances & Closure Norms
What closes Wisconsin schools? Snowday's Wisconsin calculator typically flags a snow day at about 5–7 inches of overnight or commute-hour snow, with wind chills near −25 to −30 °F an equally common trigger. Milwaukee averages about 47 inches a year. Enter your ZIP code above for tomorrow's chance.
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Your forecast appears here. Enter a ZIP code or city above and press Calculate snow day chance.
Fun estimate only — always follow your school district’s official announcements.
How Wisconsin districts decide snow days
The standard snow closure: 5 to 7 inches overnight or snow falling through the morning bus run. Milwaukee Public Schools and suburban districts track lake-effect bands closely; a snowstream off Lake Michigan can bury Racine and Kenosha while Madison stays dry.
Cold closures follow the regional pattern — wind chills around −25 to −30 °F close districts statewide, especially where students walk or wait at rural stops. Wisconsin superintendents often announce the night before when a storm’s timing is clear, sparing families a 5:30 a.m. scramble.
Average snowfall in Wisconsin
| Place | Avg. snow per year |
|---|---|
| Milwaukee | ≈ 47 in/yr |
| Madison | ≈ 50 in/yr |
| Green Bay | ≈ 60 in/yr |
Averages are approximate NOAA/NCEI 1991–2020 climate normals, rounded. Snowbelt towns downwind of Lake Superior — like Gile, near Hurley — average over 100 inches, among the highest in the Midwest.
The storm Wisconsin remembers
The January 1978 blizzard. The Great Blizzard of January 26–27, 1978 buried southern Wisconsin alongside Michigan and Ohio, with a foot and a half of wind-driven snow and near-zero visibility that stranded commuters. It closed schools across the region for days and still anchors winter-storm comparisons in the Midwest.
Using the calculator in Wisconsin
Snowday applies a 5-inch Wisconsin baseline plus cold and wind bonuses tuned for lake-effect blowing snow. Open the snow day calculator, enter ZIP 53202 for Milwaukee or 53703 for Madison, and check tomorrow’s percent. For the full picture, open the snow day calculator and see how commute-hour snowfall, cold, and wind combine into tomorrow’s percent chance — free, instant, no sign-up.
Last updated: October 2026