Snow Day Prediction Calculator — free online calculator
Blend snowfall, cold, and wind into a transparent school closure planning score.
Snow day calculator for Chicago
Tuned for Chicagoland winters—fetch forecast data or enter what you see outside.
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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