Live forecast · any ZIP code
Snow Day Calculator
Measured with patience. Predicted with care. Type your town and see the real chance school is off tomorrow — built on live weather, not guesswork.
The calculator
Will tomorrow be a snow day?
Search a city, “City, State”, US ZIP or Canadian postal code.
Crafted with patience. Forecast to perfection.
Live data
Open-Meteo blends national weather models (NOAA, ECMWF, DWD) and updates hourly — the same raw data big weather sites start from.
Snow-day logic
Overnight snowfall matters most. Ice, sub-zero lows and drifting wind push the odds higher; a warm afternoon pulls them down.
Your district
A Southern town shuts down for two inches. Buffalo shrugs at ten. Tell us which you are and the snow day predictor adjusts.
Questions people actually ask
Snow day calculator FAQ
What is the snow day calculator?+
It's a small tool that reads the live forecast for your town — snowfall, overnight lows, wind and icy rain — and turns it into a single percentage: the chance that school is called off tomorrow.
How does the snow day calculator work?+
We pull hourly-updated forecast models from Open-Meteo, the same national weather models the big apps use. Expected snowfall carries most of the weight, then we add points for freezing rain, bitter cold and blowing snow, and scale it by how used your area is to winter.
How accurate is the snow day calculator?+
Honestly? About as accurate as the forecast itself, which is very good 24 hours out and shakier beyond that. A school snow day calculator can't read your superintendent's mind, so treat 40–60% as a real coin flip.
Is the snow day calculator accurate for college?+
Colleges close far less often than K-12 schools. As a college snow day calculator rule of thumb, subtract about 20 points from what you see here.
What is the most accurate snow day calculator?+
The one using the freshest data for your exact location. Ours refreshes every ten minutes and works by ZIP code, so a Michigan suburb and a Michigan lakeshore get different answers — they should.
Who created the snow day calculator?+
The original idea dates back to a Michigan student in the late 2000s, and TV stations like Fox 8 and sites like AccuWeather later ran their own versions. This one was built from scratch for sncalculator.com as a cleaner, ad-light, open-data take.
Does the snow day calculator work for Monday?+
Yes. Scroll the forecast cards — the snow day calculator for Monday (or any of the next three days) is right there, though tomorrow is always the most reliable.
Is there a snow day calculator app?+
No download needed. Add this page to your phone's home screen and it behaves just like an app.