Snow Day Probability
☀️ Chance of school cancellation tomorrow
Data provided by Open-Meteo
The San Francisco area school districts in California together serve thousands of students across many public, charter, and private campuses. The San Francisco area averages approximately 0 inches of snowfall per year, with the heaviest snowfall typically occurring between December and February.
School districts in San Francisco generally post closure decisions to district websites and notify parents through automated alerts and local broadcasters, typically before sunrise on storm days, after coordinating with bus contractors and transportation supervisors. Two-hour delays and remote-learning days are sometimes used in San Francisco as alternatives to a full closure when conditions are borderline.
San Francisco's geography plays a meaningful role in its winter weather: a Mediterranean to semi-arid climate where snow at low elevations is unusual but mountain passes routinely close. These factors directly influence how often San Francisco schools end up closed during a given winter. Geographically, San Francisco sits near 37.77°N, 122.42°W, which shapes how regional storm systems and Arctic air masses interact with the area.
Notable historic snow events in or near San Francisco include the rare Sierra-related winter storms that have spilled into the lowlands, which produced widespread closures across the region. Historically, schools in the San Francisco area close an average of approximately 0 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 San Francisco based on live weather forecast data from Open-Meteo.
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Our calculator pulls live weather forecast data for San Francisco 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 San Francisco prediction.