Sudbury, ON snow day calculator
Your school
Next school day
Snow day–%
Late start–%
Enter a postal code above
Will there be a snow day?
- An estimate from the public forecast. Your school district makes the call.
Why the sign says so
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Snow
How many inches are forecast, against what your area usually handles.
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Timing
Whether it falls overnight or stops early enough for plows to finish.
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Ice
Freezing rain, which closes schools at far smaller amounts than snow.
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Cold
The wind chill while children wait for the bus.
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Wind
Gusts strong enough to drift snow back over cleared roads.
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Alerts
Winter warnings and advisories from Environment Canada.
Set from your province when you check a postal code. Change it if you know your district better.
Worked out in your browser from the Open-Meteo forecast, which draws on Environment Canada's weather models. No account, no cookies.
The chance school is closed or delayed in Sudbury, ON, on the next school morning.
Will there be a snow day tomorrow in Sudbury?
The sign above answers for Sudbury from the current forecast: the chance of a closure, the chance of a late start, and the snow hour by hour through the night. It is for the center of town. Schools at the edge of a district, or at a different elevation, can see different weather, so enter your own postal code if you live further out.
How much snow closes school in Sudbury
The calculator starts Sudbury at the Ontario setting, "used to snow": about 15 cm of snow overnight, or a morning wind chill near -32°C, makes closing a coin flip. That is a starting point for the whole province, and it is our judgement, not a record of what Sudbury's schools have done. Change the setting under the sign if you know the district closes more or less readily.
| Snow | Closed | Late start instead |
|---|---|---|
| 5.1 cm | 6% | 9% |
| 10 cm | 21% | 42% |
| 15 cm | 50% | 44% |
| 25 cm | 94% | 5% |
Snow day calculator for all of Ontario. Try your own numbers.