Everyday ToolboxSnow Day Calculator
Will school be cancelled tomorrow? Enter tonight's forecast and your school district's habits below, and this snow day calculator estimates your chance of a snow day — with a transparent breakdown of every factor, so you can see exactly why.
Frequently Asked Questions
How much snow does it take to cancel school?
There is no national rule — it depends on your district. As a rough guide, most districts start considering closures around 3–4 inches of snow, and cancellations become common at 5–6 inches or more. But temperature, timing, and road conditions matter as much as the total: 3 inches falling overnight in 15°F weather with icy roads cancels school far more often than 5 inches falling in the afternoon at 35°F.
How accurate is this snow day calculator?
It is an estimate based on the five factors that most influence real closure decisions: snowfall amount, temperature, timing, your district's habits, and whether it is the first snow of the season. It cannot know your superintendent's decision, road-crew staffing, or bus-fleet conditions — so treat it as a fun, informed guess, not an official announcement. Always check your school district's website, app, or local news for the real call.
Does this calculator check my school or use my location?
No. Everything runs in your browser — you enter the forecast yourself, and no location or school data is collected or sent anywhere. That keeps it private and instant, and it works for any school district in the US.
Why does temperature matter for a snow day?
Temperature decides whether snow sticks, melts, or turns to ice. Below about 25°F, snow stays put and roads ice over, which pushes districts toward closing. Near or above freezing (32°F+), snow melts on contact with treated roads, so the same snowfall is far less likely to cancel school.
Why does it matter if it is the first snow of the season?
First snows cause more chaos: drivers are out of practice, some districts are slower to pre-treat roads, and superintendents tend to err on the side of caution. Later in the season, the same forecast is less likely to close school because everyone has adjusted.
What is a snow day?
A snow day is a day when school is cancelled (or moved to remote learning) because winter weather makes travel unsafe. Many US districts build a few snow days into the school calendar each year; unused snow days sometimes turn into extra days off in spring.
Is this snow day calculator free?
Yes — completely free, no signup, no downloads. It runs 100% in your browser, so your answers never leave your device.