Snow Day Calculator
Will there be a snow day tomorrow? Enter a US ZIP code or city to see the chance that schools close or open late, based on the National Weather Service forecast.
Which one do you mean?
Your snow day chance will show here.
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Why this estimate
Hour by hour
| Time | Snow | Temp | Rain/snow chance |
|---|
All forecast numbers used
This is an estimate, not an official closure notice. Only your school district can close schools. Check its website, app or local news before the morning. How we calculate this.
What are the chances of a snow day tomorrow?
The snow day chance is our estimate that schools in your area close for the whole day. The delay chance is the extra chance that school opens late (often a 2-hour delay) instead of closing. The snow day percentage never goes above 95%, because no forecast is certain.
- 0 to 20%
- Plan for a normal school day.
- 20 to 50%
- Possible. Check again late in the evening, when the forecast is fresher.
- 50 to 80%
- Likely disruption. Watch for your district announcement, usually between 5 and 6:30 am.
- Over 80%
- A big storm. A closure is very likely, but still wait for the official word.
How to use the snow day calculator
- Type your ZIP code or city, or tap "Use my location".
- Pick your school type. Rural districts close more often than city districts, colleges much less.
- Choose tomorrow or today. Check again the evening before: that forecast is the most reliable.
What this snow day predictor looks at
Districts mostly ask one question: can buses run safely in the early morning? So the calculator looks at snow overnight and between 4 and 8 am, ice from freezing rain, wind chill before school, strong wind, and National Weather Service winter warnings. Then it adjusts for how used to snow your area is: two inches can close schools in Atlanta, while Buffalo needs far more. See exactly how the snow day prediction is calculated.
Questions
Is this snow day calculator accurate?
It is as good as the forecast it uses, and forecasts change. The evening before is the best time to check. Every district has its own rules, so treat the percentage as a guide, not a promise. More on accuracy.
Where does the weather data come from?
From the National Weather Service (NOAA), the official US forecast. We refresh it every 30 minutes at most.
Does it work outside the US?
Not yet. The National Weather Service covers the United States only.
Do you store my location?
No. Your ZIP code or position is only used to fetch the forecast. See our privacy policy.