Snow Day Calculator.
Enter a US ZIP code, Canadian postal code or UK postcode to check a weather-based estimate for the next weekday morning. The result helps you assess forecast conditions; your school or local authority confirms closures.
Snow day chance
Choose a country and enter a ZIP or postal code to check the next school day.
Weather-based estimate only. Your school, district or local authority makes the final closure or delay decision.
Will school be closed tomorrow because of snow?
The calculator gives a weather-based score for the next weekday morning. It looks for forecast snow or sleet from the previous evening through the commute, then considers temperatures and wind. It does not use historical school-closure outcomes to validate a closure probability.
A high percentage means the forecast contains several conditions that can disrupt school travel; it does not mean a closure is confirmed. Check your school, district, council or local authority for the official decision.
What can increase the chance of a snow day?
Storm timing matters as much as the headline snowfall. Snow that continues through the early-morning commute can be more disruptive than a similar amount that ends well before roads and school transport start moving.
Sleet, icy conditions and temperatures at or below freezing can raise travel risk even when snow totals are modest. Strong winds can add poor visibility and drifting or blowing snow to the same morning forecast.
Local closure policies also differ. Two nearby schools can make different decisions because of road networks, school-bus routes, rural travel, staffing and local conditions.
Snow Day Calculator for the US, Canada and UK
United States: enter a 5-digit ZIP code to check the next school-day forecast and closure risk for that area.
Canada: enter a Canadian postal code to check the next school-day risk with temperatures shown in both Celsius and Fahrenheit.
United Kingdom: enter a UK postcode to estimate the effect of wintry weather on the next school day. Always confirm closures with the school or local authority.
When should I check my snow day chance?
The evening before school is useful for an early indication. Check again early in the morning when the storm is close enough for its timing, precipitation type, temperature and wind forecast to be clearer.
When enough forecast data is available, the result also shows a compact outlook for later school days so you can see whether the risk is limited to one morning or continues into the week.
How to interpret the snow-day estimate
Choose the country and enter a supported ZIP or postal code. The forecast analysis uses the next weekday in the returned location's time zone, examining conditions from 6 pm the previous evening to 10 am that morning. Weekends are skipped; school holidays and individual calendars are not known.
The displayed percentage is an internal weather-risk score, not a statistically validated probability of school closure. The heuristic considers forecast snow or sleet, timing, duration, temperature, wind and the selected local sensitivity. For example, a forecast window without snow or sleet returns 0% in this model; that does not confirm that school will open.
Postal lookup is an area reference rather than your school's exact location, and forecast coverage or timing can change. Use the result to plan what to check next, then rely on official school, district or transport announcements for closures and travel decisions.
Frequently asked questions
Will my school be closed tomorrow because of snow?
The calculator estimates the weather risk for the next school morning, but it cannot confirm a closure. Your school, district, transport provider, council or local authority makes the official decision.
How accurate is the Snow Day Calculator?
The percentage is a heuristic weather-risk score, not a statistically validated probability of school closure. Forecasts, postal-area coverage and local decisions can change. Verify official announcements even when the displayed estimate is low.
What weather conditions increase the chance of a snow day?
Snow or sleet during the morning commute, longer-lasting wintry precipitation, freezing temperatures and strong winds can all increase the estimate.
Does freezing rain or sleet matter even if snowfall is low?
Forecast sleet and freezing temperatures can influence the score when wintry precipitation is present. The model does not independently predict every icing hazard or school decision, so a low result should not be treated as a travel-safety assessment.
Does the calculator work in Canada?
Yes. Enter a Canadian postal code to check the next school-day weather risk for the area.
Does the calculator work in the UK?
Yes. Enter a UK postcode. The result is still only an estimate; official school closures should be checked with the school or local authority.
When should I check my snow day chance?
Check the evening before for an early view, then check again closer to the morning commute because storm timing and precipitation type can change.
Why can two nearby schools make different closure decisions?
Schools can have different bus routes, rural-road exposure, staffing, local policies and site conditions. The same weather therefore does not guarantee the same decision everywhere.
Does the calculator know school holidays or planned closures?
No. It skips weekends when choosing the next weekday, but it does not know every school's calendar, teacher-training days or planned closures.
Forecast data: Postal-area lookup: Zippopotam.us · MET Norway
