About Snow Day Percent

A snow day calculator that shows its work.

Snow Day Percent turns the National Weather Service forecast for your area into an estimate of whether school will close, open late, or face a cold day. Most snow day calculators give you a number and ask you to trust it. We'd rather show you where the number comes from, so every result comes with a receipt: each factor, the forecast value behind it, and the points it added.

We started in November 2026. The model is new, and we say so: every weight is labelled as an assumption until it has been checked against real school closures. We're logging outcomes and will publish the results, misses included, on How it works once there are enough to mean something.

Independence

This is an independent site. It isn't affiliated with the National Weather Service, NOAA, or any school district, and none of them reviews or endorses it. It's free to use and has no ads right now.

Contact

Corrections, a district rule we should know about, or a question about the method: 3nergys@gmail.com.