Everything you need to understand the snow day score, the weather factors behind the forecast and how the Snow Day Calculator works before schools make their final closure decisions.
Explore the weather, prediction, probability and school-closure topics behind our Snow Day Calculator. Start with how the calculator works or learn more about the weather factors used in snow day predictions .
Learn how location, forecast intervals and winter weather signals are used to create a simple snow-day probability score.
Read guide →Understand what low, possible, high and very high snow-day percentages mean when checking tomorrow's forecast.
Check probability →Learn how snow, temperature, ice, wind, visibility and storm timing can affect school disruption.
Read guide →Learn why schools may close, delay opening or change schedules during disruptive winter weather.
View questions →Learn when to check the forecast, when to recheck the prediction and why official school announcements always come first.
Explore guides →Search cities around the world while remembering that school closure practices vary between countries and local school systems.
Check your location →If you already know your city or ZIP code, you can skip the reading and check the current weather-based prediction first.
After checking your score, read how the calculator works and explore the weather factors that can influence the result.
Remember: the result is for planning and curiosity, not an official school closure announcement.
Check Snow Day →If this is your first time using the site, start with the Snow Day Calculator to check the current prediction for your location. Then read How the Snow Day Calculator Works to understand how forecast information is converted into an easy-to-read probability.
Snowfall alone does not determine whether school will close. Temperature, freezing rain, road conditions, visibility, wind and storm timing can all affect how disruptive a winter weather event becomes. Our Weather Factors guide explains these signals in more detail.
The Snow Day Calculator provides a weather-based prediction, not an official school closure announcement. Local districts and schools may consider transportation safety, road treatment, building access, staffing, local policies and other factors before making their final decision. You can also review the Snow Day Calculator FAQ for answers to common questions.
Enter your city or ZIP code and get a quick weather-based snow-day estimate.