Its accuracy hasn’t been measured yet. The formula hasn’t been tested against real school closing records, so treat the percentage as an estimate from the forecast, not a reliable prediction. Only your school district decides.

The hourly forecast from Open-Meteo for the place you search: snowfall, temperature, wind gusts, and whether freezing rain or freezing drizzle is expected, from 6 pm the evening before to 8 am. It doesn’t use radar, road reports or school announcements.

No. This site isn’t affiliated with any school, district or weather service. Always check your district’s own announcements.

It’s a score built from the forecast and the published rules in How it works: points for snow, ice, cold and wind, scaled by any optional answers. A higher number means more of the weather that leads districts to close is in the forecast. It isn’t a measured probability: it hasn’t been checked against real closings, so 70% doesn’t mean schools closed on 7 of 10 similar mornings. 60% or higher reads Likely, 30–59% Maybe, and under 30% No Chance.

Forecasts change overnight, and districts weigh things a forecast can’t show, such as road crews, bus routes and staffing. The result is always kept between 1% and 99% to reflect that uncertainty.

It always checks the next school morning in the searched place’s time zone: today if it’s before 6 am on a weekday, otherwise the next weekday, so Fridays and weekends look ahead to Monday. It doesn’t know about holidays, breaks or teacher work days.

There’s no national rule; each district decides, and the amount varies widely. Places that rarely see snow may close for an inch or two, while snowy regions often stay open through several inches. Timing, temperature, ice and how fast roads are cleared matter too. In this calculator, about 2 inches of overnight snow on its own reads Maybe and a little over 4 inches reads Likely, with snow points halved if it’s above 34°F at 7 am.

Yes. Freezing rain can coat roads and sidewalks with ice, and bitter cold can make waiting at bus stops unsafe, so districts sometimes close for either. The calculator adds 30 to 65 points for freezing rain or drizzle, depending on how many hours it lasts, and 10 points at 0°F or colder at 7 am (20 at −15°F or colder). A long night of freezing rain alone can reach Likely, while cold alone adds less.

A snow day closes school for the whole day. A delay (often 2 hours) starts school later to give crews time to clear and treat roads, and an early dismissal sends students home before the normal end of the day when weather gets worse during school hours. The calculator only estimates the chance of a full closure on the next school morning; it doesn’t predict delays or early dismissals separately, and only your district decides which one to use.

Only your school district can say for sure. To see how likely it is, type your city or ZIP code into the calculator at the top of this page: it estimates the chance of a closure on the next school morning from the overnight forecast. On a Friday or a weekend, that means Monday. Check your district’s own announcements for the final word.

No one knows until a district announces it. This no school calculator only looks at the next school morning, using the forecast for that night; it doesn’t predict snow days further ahead. Check again the evening before any school day with snow or ice in the forecast.

It uses the weather for the town you search, not information about your district, and it doesn’t know your district’s closing policy. The optional “Sharpen your prediction” questions let you describe how easily your district closes, your roads and your school type.

Type a city name or a 5-digit US ZIP code. US places are checked first; if no US place has that name, the search looks worldwide. If the wrong town comes up, add a state or country after a comma, for example “Portland, OR” or “Paris, France”. A state name on its own isn’t enough: enter a city or ZIP code in that state. Places outside the US can be found too, but the rules are built around US school mornings, in °F and inches.

The evening before, and again early in the morning. Each search uses the current forecast, and overnight forecasts often change. Before 6 am on a weekday it shows that same morning.

Each answer multiplies the weather points (not the starting value): a district that closes rarely ×0.7 or easily ×1.75; city roads ×0.9, rural or hilly ×1.2; private school ×0.95, college ×0.6. Skipping a question, or choosing Average, Suburbs or Public, changes nothing.

It opens a Google search for school closings in the place you found, in a new tab. The calculator doesn’t check closings itself and can’t confirm whether your school is closed.

No. There are no accounts, cookies or saved history, and nothing is kept in your browser’s storage. Your search and answers are forgotten when you close or reload the page.

To get the forecast, your browser sends the city part of your search (the words before any comma) to Open-Meteo’s place search, then the found place’s map coordinates to Open-Meteo’s forecast. Fonts load from this site. Google sees the place name only if you tap “Is my school closed?”. Like any website, these services can see your IP address. The share card is made on your own device. Full details are in the Privacy Policy.