Snow Day Calculator ❄️
Instantly calculate your school's snow day probability using real-time weather data, historical closure records, and our AI prediction model.
The Snow Day Calculator from Summersnowday is the most advanced free tool available for predicting school closures in 2026. Unlike simple weather apps that only show snowfall totals, our calculator analyzes multiple meteorological factors simultaneously to produce a precise probability score for your exact ZIP code or city.
Our prediction engine was trained on over a decade of school closure data from thousands of districts across the United States and Canada. When you enter your location, the calculator cross-references live weather feeds with historical patterns from your specific region—accounting for everything from surface road temperatures to your district's documented closure threshold.
Snowfall alone rarely tells the whole story. A six-inch snowfall in Syracuse, New York—a city that receives over 120 inches per year—is unlikely to cancel school. But the same six inches in Charlotte, North Carolina, would almost certainly result in a closure. Our snow day calculator understands these regional differences and weights each factor accordingly.
The calculator considers four primary variables: snowfall accumulation and type (dry powder vs. wet heavy snow), current and forecast temperature (including wind chill), storm timing relative to school start times, and historical closure frequency for your region. These inputs feed our machine-learning model, which outputs a probability score from 0% to 100%.
Want to understand the science? Visit our How It Works page for a deep dive into our prediction methodology. Ready to find out if your school is cancelling? Enter your location above and get your instant prediction.