The Online Snow Day Calculator turns tomorrow's weather forecast into the chance that school is closed or delayed. Students use it to see whether it is worth hoping, parents use it to plan childcare and work, and teachers use it to get ahead of a disrupted week.
How the estimate is made
For the location you enter, we pull an hourly forecast and look at the window that matters for closing decisions: from 6 PM the evening before through the morning bus run, with a smaller weight on snow that keeps falling until mid-afternoon. Snowfall, freezing rain, feels-like temperature and wind gusts are each scored, with extra weight when wintry weather overlaps the 5 to 9 AM commute. A setting for how easily your district closes and a count of snow days already used then adjust the total, and the result is converted into a closure percentage and a separate 2-hour delay percentage.
The scoring weights are our own estimates, based on how districts commonly make weather decisions. They are not trained on official closure records, and we do not claim a specific accuracy rate. For a deeper look, see how snow day predictions work.
Where the weather data comes from
Forecasts come from Open-Meteo.com, an open weather data service, licensed under CC BY 4.0. Place names are matched with Open-Meteo's geocoding service. We cache forecasts for about 15 minutes to keep the site fast.
What this site is not
This site is not affiliated with any school, district or government agency. It cannot announce, confirm or cancel a closure. A percentage is an estimate, and local decision makers weigh road conditions, bus routes, staffing and safety in ways a forecast cannot capture. Always follow your district's official alerts.
Your privacy
There are no accounts. Read the privacy page for exactly what happens to the places you search.