Snow Day Prediction Calculator — free online calculator
Blend snowfall, cold, and wind into a transparent school closure planning score.
Snow day calculator for Toronto
Built for Southern Ontario-style storms—use manual inputs or load weather for Toronto.
Open the main snow day calculator for the default experience and other regions.
Storm inputs
Updates live — no submit button
Requires OPENWEATHER_API_KEY on the server. Otherwise enter snow, temp, and wind yourself.
Snowfall
Temperature
Wind speed
Morning start window can nudge odds slightly.
School type
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