Alliston Snow Day Predictor
Check tomorrow's estimated chance of a snow day in Alliston, ON, including the weather signal behind bus cancellations, school closures and delays, then confirm with the official Simcoe County Student Transportation Consortium (SCSTC) notice.
Will school close tomorrow?
Enter a city, ZIP code, or postal code. We use live weather data to estimate closure, delay, and normal-schedule chances.
Why this estimate?
Tomorrow morning
5-day snow day outlook
Same model, one forecast request. Later days are planning signals and become less certain farther from today.
Alliston snow day forecast for Thursday, November 5
The forecast for Alliston shows little winter-weather disruption signal for Thursday, November 5.
- Snow forecast for the day: 0.0 cm, including 0.0 cm in the 4–9 AM travel window.
- Morning low 13°C, feeling like 11°C, with gusts up to 37 km/h.
5-day Alliston outlook
| Day | Snow | Low / high | Closure | Delay |
|---|---|---|---|---|
| Thu Nov 5 | 0.0 cm | 10° / 16°C | 0% | 0% |
| Fri Nov 6 | 0.0 cm | 9° / 11°C | 0% | 0% |
| Sat Nov 7 | 0.0 cm | 5° / 9°C | 0% | 0% |
| Sun Nov 8 | 0.0 cm | 3° / 13°C | 0% | 0% |
| Mon Nov 9 | 0.0 cm | 5° / 12°C | 0% | 0% |
Snapshot saved 2:47 PM EST from the same weather model as the live calculator above, which always shows the newest run. Later days are less certain. This is not an official school or transportation announcement.
Alliston bus cancellations and school closures
Alliston, in the Town of New Tecumseth, is served by the Simcoe County Student Transportation Consortium. Many students in the surrounding rural area depend on buses, so SCSTC zone decisions are what most families watch.
Who makes the call in Alliston
- School board: Simcoe County District School Board (SCDSB)
- School board: Simcoe Muskoka Catholic District School Board (SMCDSB)
- School buses: Simcoe County Student Transportation Consortium (SCSTC)
How Alliston weather decisions work
- SCSTC and the bus operators make bus-cancellation decisions, usually before 6:00 AM, and aim to post them between 6:00 and 7:00 AM on the SCSTC website, its X account and local radio.
- A morning cancellation applies to the whole day, and it can cover one weather zone, several zones, or all of Simcoe County. SCSTC lists the zone for each school.
- SCDSB says its schools remain open when buses are cancelled; students who stay home can use the learning platform their teacher assigns.
- SCSTC weighs road conditions, current and forecast weather, visibility, snow or freezing rain, and whether plows have been out.
Local weather to watch
Open farmland around Alliston can produce blowing and drifting snow and poor visibility even when snowfall totals look modest, one reason rural routes can be cancelled when town streets look manageable.
Local guidance reviewed November 2, 2026. Official school-board and transportation notices always take priority over this estimate.
Alliston snow day questions
Are Simcoe County schools closed when buses are cancelled?
Not usually. SCDSB says its schools stay open for learning when SCSTC cancels buses, unless a separate closure is announced. Catholic-board families should check SMCDSB notices.
Chance of a snow day in Alliston
The estimate above is driven by the forecast for Alliston, not by generic city text. Snow during the early-morning travel window counts more than snow that ends earlier, and the model also checks freezing precipitation, refreeze risk, severe cold, wind gusts and visibility.
Bus cancellation or school closure? In many Canadian boards the first thing bad weather changes is transportation: buses are cancelled for the day while schools stay open for students who can get there safely. The "weather disruption signal" combines the closure and delay chances as a rough guide to how likely the morning is to be disrupted. It is not a separate, calibrated bus-cancellation model.
How this Alliston estimate works
The baseline model uses live Open-Meteo forecast data. It does not claim to know a board's historical closure behaviour, and ChanceOfSnowDay does not publish an accuracy percentage until verified outcomes have been collected and reviewed.