Snow Day Calculator

Enter your ZIP code above — the calculator pulls the live 24-hour forecast for your area (expected snowfall, overnight low, wind, and 4–7 AM conditions) and turns it into a transparent probability score. Scores above 75% mean a snow day is very likely; below 20% means unlikely.

There is no fixed number — it varies by district, road conditions, and timing. As a rough rule, many US districts start considering closures around 4–6 inches (10–15 cm) of overnight snow, but extreme cold (below about −15°C / 5°F) or high winds can close schools with much less snow. Our scoring model reflects this: snowfall sets the base score, cold and wind add to it.

It is an estimate based on live forecast data, not a guarantee — school districts weigh road crews, bus safety, and building conditions too. Forecasts are most reliable 12–24 hours out, so check again the evening before and early morning. Read our full accuracy breakdown for the honest details.

Yes — completely free, no account, no signup. We use free public weather data (Open-Meteo) and free geocoding, so there is nothing to pay for.

Yes. Switch to the CA tab and enter your postal code (e.g. K1A 0B1). The same live-forecast scoring applies across Canada and the US.

Because the final call weighs more than snowfall: plowed main roads, timing (snow stopping before dawn), and whether buses can run safely. Our score estimates the weather side of that decision — the district decides the rest.