Minnesota Snow Day Calculator
Arctic air, Lake Superior snow and prairie wind make Minnesota America's snow day capital. Check your chances.
Why Minnesota gets so many snow days
Minnesota does winter like nowhere else in the Lower 48. There is no mountain wall between Minnesota and the Arctic, so Canadian cold pours straight down the plains, with storms riding in on top of it. Duluth averages about 229 cm (90.2 in) of snow a year — one of the six snowiest larger cities in the United States — while Minneapolis–St. Paul averages roughly 130 cm (about 51 in). Snow can arrive in October and linger into April. For Minnesota families, the question is rarely if winter will interfere, but when.
How Minnesota districts decide
- Timing matters: snow falling between 4 and 7 AM, before plows and buses catch up, closes school far more often than the same snow at noon.
- Superintendents weigh the whole picture — forecast totals, ice, wind and visibility, and whether buses can run safely across the whole district, not just in town.
- Cold counts on its own: many districts start seriously considering a closure when wind chills approach −37 °C (−35 °F), even on a clear, dry morning.
- The call is local, and districts with an adopted plan may use up to five state-allowed e-learning days a year instead of closing.
Minnesota snow day tips
Start the evening before: enter your ZIP, pick your school type — rural districts tend to call it sooner, while colleges are the least likely to close — and read your 0–95% probability together with the "storm risk" score and the hourly detail. Our score weights snow in the 4–7 AM bus window most heavily. For the full methodology, see how the calculator works. Set the alarm anyway: a high score is a strong hint, never a promise, and the district's word is final. Checking a school across the river or up at the cabin? The snow day calculator on our homepage takes any US ZIP or Canadian postal code.
The polar vortex, explained
The polar vortex is a pool of bitterly cold air that normally circles the Arctic. When the winds holding it in place weaken or wobble, lobes of that air spill south — and Minnesota sits directly in the spillway, with no mountain barrier to slow the air or warm it on its way down. January mornings here can start near −30 °C before the wind even joins in. In January 2014 the spill turned historic: ahead of forecast lows around −34 °C and wind chills approaching −46 °C, Governor Mark Dayton cancelled every public school in the state for Monday, January 6 — the first statewide cold closure in 17 years. Lake Superior plays the supporting act around Duluth, where lake-effect snow buries the hill above the harbour. But statewide, Arctic air is the headline act: Minnesota is America's cold-out state because nothing stands between its classrooms and the North Pole but prairie.
Three Minnesotas in winter
- The Twin Cities metro: Minneapolis, St. Paul and big suburban districts like Anoka-Hennepin — the state's largest, serving about 38,000 students — juggle huge bus fleets and city traffic. Freeways can look fine while side streets and bus stops stay treacherous.
- The North Shore & Duluth: Lake effect plus Duluth's steep hill means the hilltop can bury itself while the lakeshore gets off lighter — and the season runs into April.
- The open prairie west & south: Around Rochester, which averages about 135 cm of snow a year, and across farm country, wind is the real closer. A modest 8–10 cm can blow into whiteouts and drifts that seal rural bus routes.
Cold days: closures with no snow at all
Some of Minnesota's most memorable closures arrive under blue skies, with not a flake in sight. Our formula adds 5 points when the overnight low drops below −10 °C, and in Minnesota that bonus matters far more often than in most states: once the wind picks up, the real question is the wind chill at the bus stop, where children wait in the dark. Saint Paul Public Schools may call a closure or e-learning day when wind chills are forecast at −37 °C (−35 °F) or colder at 6 AM; Minneapolis publishes similar guidance. There is no single state rule. A "cold day" is a real snow day here, just without the snow.
How many inches of snow cancels school in Minnesota?
Minnesota is the hardest case in this guide: snow alone rarely closes metro districts that are equipped, staffed and culturally determined to run. When Minneapolis–Saint Paul schools do close for snow, it is usually a major storm — on the order of 8–12 inches with wind and drifting — not an ordinary overnight fall. The classic Minnesota closer is not snow at all: it is extreme cold, when wind chills fall into territory where exposed skin frostbites in minutes at a bus stop. Southern and rural districts, with long routes and fewer resources, close more readily than the metro — but nowhere in Minnesota is 4 inches a snow day by default.
Will there be a snow day in Minnesota tomorrow?
It is the question this page answers every day. Put your Minnesota ZIP in the calculator above for tonight's live score at your exact location — or go straight to tomorrow's snow day chances for the morning-by-morning view, today's snow day status if snow is already falling, and our school closing predictor for district-style closing calls. The full snow day predictor breaks down every factor behind your score.
Checking another state? The same live forecast powers our Wisconsin snow day calculator, Michigan snow day calculator and Illinois snow day calculator — or start from the main snow day calculator for any US ZIP or Canadian postal code.
Frequently asked questions
Why does Minnesota get so much snow?
Geography. Arctic air arrives with no mountains in the way, storm tracks cross all winter, and around Duluth, cold air crossing Lake Superior adds lake-effect snow. The result: roughly 130 cm a year in the Twin Cities, about 229 cm in Duluth.
My district rarely closes, even when my score is high. Why?
Our score reads the weather, not your district's personality. Some have more plows, shorter routes or a hardier tradition; some switch to an e-learning day instead of closing. Set your school type — rural, suburban, city or college — so the score matches your school type's habits.
When are Minnesota school closings usually announced?
Typically between 5:00 and 6:00 AM, after officials check the early-morning forecast and roads. For a well-forecast storm or extreme cold, districts often announce the evening before. For an e-learning day, state law requires notice at least two hours before the normal start time.
How far ahead can the calculator predict a snow day?
Check several days out for an early hint — a rising score is worth watching. It is most trustworthy the night before and early the next morning, when the hourly forecast firms up and the decisive 4–7 AM window comes into focus.
What wind chill closes schools in Minnesota?
There is no state rule — each district decides. Many start seriously considering closure around −37 °C (−35 °F) at bus-stop time: Saint Paul lists that figure in its guidelines, and Minneapolis says it will consider closing at the same level. Only in extreme cold has the state stepped in, as in January 2014.
Will there be a snow day in Minnesota tomorrow?
Minnesota is the state where the ZIP code matters and the statewide answer matters least — metro, north and south run on different thresholds. Enter your ZIP code above tonight, weigh the wind chill as heavily as the snow total, and check again in the morning. Districts typically announce between 5 and 6 AM.
How many inches of snow does Minnesota need for a snow day?
There is no official number, and Minnesota’s is the highest in the country in practice: metro districts often need a major storm — roughly 8–12 inches (20–30 cm) with wind — while the more common closer is extreme wind chill. Rural districts close on less, but 4 inches alone almost never cancels school in Minnesota.
How accurate is the Minnesota snow day calculator?
The score is built from the live hourly forecast for your ZIP code plus the factors districts actually weigh — timing, ice risk, wind and cold, with the cold adjustments doing real work in Minnesota. It is sharpest 12–24 hours out. The district’s own habits are the known unknown here; our accuracy page explains how the score is checked against real outcomes.