Snow Day Probability
☀️ Chance of school cancellation tomorrow
Data provided by Open-Meteo
The the public, charter, and private school districts serving the greater Philadelphia area together serve thousands of students across many public, charter, and private campuses. The Philadelphia area averages approximately 26 inches of snowfall per year, with the heaviest snowfall typically occurring between December and March.
School districts in Philadelphia generally communicate closures via district websites, robocalls, social media, and local news, with most calls made between 4:30 and 6:00 AM after consultation with road crews and the National Weather Service. Two-hour delays and remote-learning days are sometimes used in Philadelphia as alternatives to a full closure when conditions are borderline.
Philadelphia's geography plays a meaningful role in its winter weather: a humid continental climate exposed to both lake-effect snow off Lake Erie and Atlantic nor'easters. These factors directly influence how often Philadelphia schools end up closed during a given winter. Geographically, Philadelphia sits near 39.95°N, 75.17°W, which shapes how regional storm systems and Arctic air masses interact with the area.
Notable historic snow events in or near Philadelphia include the Blizzard of 1993 ("Storm of the Century") which crippled the eastern US, which produced widespread closures across the region. Historically, schools in the Philadelphia area close an average of approximately 7 days per winter season due to snow, ice, or extreme cold. Use our Snow Day Calculator above to check tomorrow's real-time school closure probability for Philadelphia based on live weather forecast data from Open-Meteo.
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Mainly clear
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No snowfall or significant winter weather expected this week; schools unlikely to close for any day.
Generated by AI from 7-day Open-Meteo forecast. Snow day predictions are probability estimates based on weather forecast data. School closure decisions are made by local school administrators — always verify with your school's official website, app, or local news for confirmed cancellations.
Our calculator pulls live weather forecast data for Philadelphia from the Open-Meteo API and analyzes snowfall accumulation, temperature, wind chill, and 24-hour precipitation totals to generate a school closure probability percentage.
Check between 9 PM and midnight the evening before a potential storm. Weather models are most reliable within a 12–18 hour forecast window, giving you the most accurate prediction for the following morning.
Yes. Public schools close more readily than private schools, which close more readily than colleges and universities. Select your school type for the most accurate Philadelphia prediction.