Snow Day Calculator & Predictor
Will school close tomorrow? Enter a city, ZIP code, or postal code for a live closure, delay, and normal-schedule estimate.
Will school close tomorrow?
Enter a city, ZIP code, or postal code. We use live weather data to estimate closure, delay, and normal-schedule chances.
Why this estimate?
Tomorrow morning
5-day snow day outlook
Same model, one forecast request. Later days are planning signals and become less certain farther from today.
Tomorrow's Snow Day Watch
Quick comparison of selected snow-prone school markets using the same model as the calculator. Official school or district notices always take priority.
These are weather-based estimates for comparison, not official school-closure announcements.
Snow day forecasts by region and city
Snow day guides
How to use your snow day estimate
What is the chance of a snow day tomorrow?
The calculator estimates how likely tomorrow's weather is to disrupt school and separates the result into closure, delayed-opening, and normal-schedule chances.
It does not turn precipitation probability into closure probability. The baseline model separately evaluates morning snowfall, overnight accumulation, prior-day heavy snow, freezing precipitation and refreeze signals, severe cold, wind gusts, visibility, and—where available in the United States—active National Weather Service winter alerts.
How should I read the snow day percentage?
The percentage is a planning estimate, not an official district announcement. A higher number means the forecast contains more weather signals associated with school disruption; the final decision still belongs to the school, district, transportation authority, or campus.
What does the 5-day snow day outlook mean?
After you enter a location, the result includes a five-day school-disruption outlook using the same model for each forecast day. Tomorrow deserves the most weight for planning; later days are early signals to watch because forecast uncertainty increases farther out.
About the model
The current prediction model is a baseline estimate, not a published accuracy claim. We are building a prediction-history dataset so forecasts can later be compared with verified open, delayed, and closed outcomes and calibrated over time.
Weather data: Open-Meteo. US official winter alerts: National Weather Service when available.