About Snow Day Estimator
Snow Day Estimator is a free snow day calculator that estimates the chance of a school closure or delay tomorrow from National Weather Service forecasts, each town's normal snowfall and live closure reports.
We built it because most snow day calculators treat every town the same. Four inches of snow means something very different in Atlanta than in Buffalo, so we set a closing point for each town from its NOAA normal snowfall, and we show the reasons behind every number instead of a bare percentage.
Where the data comes from
- Forecasts and alerts: National Weather Service, api.weather.gov.
- Normal snowfall: NOAA 1991–2020 U.S. Climate Normals.
- Past snow days: NOAA Global Historical Climatology Network Daily (GHCN-Daily).
- Places and ZIP codes: U.S. Census Bureau gazetteer files and population estimates.
- Closure reports: people near you, one tap at a time.
Read the full method. Snow Day Estimator is independent and isn't affiliated with the National Weather Service or any school district.
Contact: contact@snowdayestimator.com