Check your snow day chances before the school announcement. Enter your location and get an instant school closure prediction based on real weather data — snowfall, wind chill, ice risk, and local conditions.
Our Snow Day Calculator analyzes live forecast data for your location — snowfall accumulation, temperature, wind chill, freezing rain, and road conditions — and returns a school closure probability score. Not a generic weather forecast. A snow day prediction built for your school district.
Results based on your selected city, ZIP code, or Canadian Postal Code — not a regional average.
Snowfall, temperature, ice, wind, and storm timing analyzed together in one score.
Understand your closure risk before the official district announcement arrives.
Where you live changes everything. A storm that shuts down one city might be a normal Tuesday in another. Enter your city name, ZIP code, or Canadian Postal Code and the calculator finds your selected location — then pulls forecast data specific to your area, not a regional average.
Once your location is confirmed, the calculator pulls forecast data and official weather alerts — using the National Weather Service for US locations and weather forecast data for Canadian locations — covering snowfall, temperature, wind, ice, and storm timing. Active winter storm warnings, winter storm watches, and blizzard warnings are factored into your result.
Your prediction combines snowfall totals, ice risk, temperature, wind, and storm timing into one easy-to-understand Snow Day Index score. The score reflects how your local conditions compare to the kind of weather that typically leads to school closures in your region. One score. One clear answer.
Total snowfall is the most visible factor — but what counts as "a lot" depends on where you live. Different snow types affect travel differently. Lake-effect snow brings rapid accumulation and low visibility. Wet heavy snow strains roads and creates hazardous surfaces. Sleet, snow squalls, and mixed precipitation each carry different risks. The calculator considers regional winter conditions when interpreting your prediction.
Dangerous cold can close schools even without snow. When temperatures or wind chill create safety risks for students waiting at bus stops or walking to school, districts take action. The calculator factors in overnight lows and morning wind chill — not just whether snow is falling.
Ice is often more disruptive than snow. Even a small amount of freezing rain can make roads and sidewalks dangerous for school buses and student travel. When the forecast includes freezing rain, ice accumulation, or black ice risk, the calculator reflects that in your Snow Day Index.
When a storm hits matters as much as how strong it is. Snow falling overnight before school starts is far more disruptive than an afternoon storm. The calculator looks at when precipitation is scheduled to peak — giving extra weight to weather that arrives just before or during the morning commute.
School districts don't just close schools because of snow — they close them when bus routes become unsafe. Side roads and rural routes are often the last to receive snow plowing and salt treatment. The calculator considers how road maintenance, visibility, and transportation safety affect the likelihood of a closure or delay in your area.
Your score is an estimate — not an official school decision. Always check your district's website or parent notification system for confirmed announcements.
Know if tomorrow may be a snow day before you go to sleep. No more waking up early to check.
Plan childcare, adjust your commute, and arrange your morning before the district announcement hits.
Prepare remote learning materials or decide on your commute based on an early weather-based estimate.
Winter conditions affect more than schools. Commuters can use the calculator to understand morning travel risks during major storms.
Don't just check tomorrow. The 5-Day Snow Outlook shows upcoming winter weather conditions across your area so you can plan ahead — whether it's a vacation, a work week, or back-to-back storm days.
See exactly when snow is expected to fall and how conditions change hour by hour. Useful for understanding whether the worst weather hits during the school morning window or clears before the day begins.
Curious what happens if snowfall doubles — or if ice is added to the forecast? The What-If tool lets you adjust weather variables and instantly see how your Snow Day Index changes.
Know your local conditions? Enter them directly. The manual calculator lets you input snowfall amount, temperature, wind speed, and ice status yourself.
Know possible delays or closures before you go to sleep — so your morning isn't a surprise.
Understand the weather impact on your school day instead of refreshing news sites and waiting.
Prepare childcare, commuting plans, and schedules ahead of time with an early prediction.
Snow day probability varies by region, climate, and school district standards. Our snow day predictor covers US cities by ZIP code and Canadian cities by postal code.
Lake-effect snow is the main winter challenge in Buffalo. Rapid accumulation, reduced visibility, and heavy snowfall rates off Lake Erie can affect morning transportation and school bus routes with little warning.
Check Buffalo →Nor'easters are the defining winter threat in Boston. Coastal storms bring heavy wet snow and freezing rain that make roads dangerous quickly across the Greater Boston area.
Check Boston →Chicago faces two major winter challenges: lake-effect snow from Lake Michigan and extreme wind chill. Both are factored heavily into Chicago-area school closure decisions.
Check Chicago →New York City has five boroughs and dozens of school districts, each with different winter weather exposure. Enter your specific ZIP code for a prediction that reflects your neighborhood's conditions.
Check New York →Lake-effect snowfall from Lake Erie and Lake Huron affects Metro Detroit regularly. Cold temperatures and icy roads make school bus route safety a major factor in closure decisions.
Check Detroit →Syracuse receives some of the highest snowfall totals of any major US city. Frequent winter storms and lake-effect snow events from Lake Ontario make early prediction especially useful here.
Check Syracuse →Lake Ontario lake-effect snow hits Rochester consistently throughout winter. Rapid accumulation and changing conditions often make school decisions difficult without early weather data.
Check Rochester →Ontario winters bring heavy snowfall and ice storms across the GTA. School operations are regularly affected by both accumulation and freezing rain events throughout the season.
Check Toronto →Ottawa experiences some of Canada's coldest winter conditions among major cities. Extreme cold and heavy snowfall are both significant factors — and wind chill alone can trigger school closures or delays.
Check Ottawa →Quebec winters are intense and long. Heavy snowfall in Montreal frequently exceeds levels that close schools in warmer regions, making regional calibration essential.
Check Montreal →Alberta's Chinook weather system creates rapid temperature swings from mild to severe winter conditions. Rapid weather changes can make winter conditions harder to predict in the Calgary area.
Check Calgary →Edmonton's northern location means extended cold snaps and significant snowfall throughout a long winter season. Extreme wind chill is a major factor in school closure decisions.
Check Edmonton →Prairie winters in Winnipeg are punishing. Wind chill factors regularly reach dangerous levels for morning travel, making temperature as important as snowfall in closure decisions.
Check Winnipeg →Vancouver experiences different winter conditions than snow-heavy Canadian cities, so even moderate snowfall can create significant travel challenges and school disruption.
Check Vancouver →Heavy snow and extended cold are the norm in Quebec City. School closures are driven by both high snowfall accumulation and dangerous wind chill through the winter months.
Check Quebec City →Maritime snowstorms hit Halifax hard and fast. Unpredictable nor'easters bring heavy wet snow and freezing rain that regularly disrupt school operations across Nova Scotia.
Check Halifax →Northwestern Ontario winters combine heavy lake-effect snow from Lake Superior with extreme cold. Both factors create serious challenges for school transportation and morning safety.
Check Thunder Bay →Your Snow Day Calculator gives you an estimate — but school districts make the final call. Here's how that decision typically works:
School superintendents and transportation teams monitor weather conditions starting the night before. They evaluate road reports, check bus route safety, and consult with local emergency services. Some districts may also consider operational policies and calendar requirements when making their decision. The decision often happens between midnight and 5 AM — which is why official announcements can arrive before you wake up.
The calculator helps you prepare before that announcement arrives.
Weather is unpredictable — and no prediction tool is perfect.
Our Snow Day Calculator is as accurate as the forecast data it uses. When forecasts are reliable, the prediction tends to be reliable. When weather shifts overnight, results can change. That's why we recommend checking the calculator the night before and again in the morning if conditions are uncertain.
What it does well:
What it can't replace: your school district's official announcement.
Know if tomorrow may be a snow day before you go to sleep. No more waking up early to check the news or wait for a robocall. Check the calculator the night before and go to bed with a clear picture of what tomorrow morning might look like.
Plan childcare, adjust your commute, and arrange your morning before the district announcement hits. For working parents, an early snow day prediction can be the difference between a manageable morning and a last-minute scramble.
Prepare remote learning materials or decide on your commute based on an early weather-based estimate. Teachers can use the Snow Day Calculator to evaluate whether it's worth preparing digital assignments the night before, especially when a storm is approaching.
Winter conditions affect more than schools. Commuters can use the calculator to understand morning travel risks during major storms — even if they don't have kids in school. If conditions are bad enough to close schools, they're bad enough to factor into your morning commute decision.