Waterloo Snow Day Predictor
Check tomorrow's estimated chance of a snow day in Waterloo, ON, including the weather signal behind bus cancellations, school closures and delays, then confirm with the official Student Transportation Services of Waterloo Region (STSWR) 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.
Waterloo snow day forecast for Thursday, November 5
The forecast for Waterloo 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 12°C, feeling like 9°C, with gusts up to 39 km/h.
5-day Waterloo outlook
| Day | Snow | Low / high | Closure | Delay |
|---|---|---|---|---|
| Thu Nov 5 | 0.0 cm | 9° / 16°C | 0% | 0% |
| Fri Nov 6 | 0.0 cm | 6° / 10°C | 0% | 0% |
| Sat Nov 7 | 0.0 cm | 6° / 8°C | 0% | 0% |
| Sun Nov 8 | 0.0 cm | 2° / 11°C | 0% | 0% |
| Mon Nov 9 | 0.0 cm | 4° / 13°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.
Waterloo bus cancellations and school closures
Waterloo shares one transportation service and the same two school boards with Kitchener and Cambridge, so a Waterloo snow day is decided region-wide by WRDSB, WCDSB and STSWR together.
Who makes the call in Waterloo
- School board: Waterloo Region District School Board (WRDSB)
- School board: Waterloo Catholic District School Board (WCDSB)
- School buses: Student Transportation Services of Waterloo Region (STSWR)
How Waterloo weather decisions work
- WRDSB makes severe-weather decisions with STSWR and the Waterloo Catholic District School Board, using early-morning road and weather conditions, and tries to communicate cancellations or closures by 6:00 AM.
- Waterloo Region has separate scenarios for bus cancellations, school closures and early dismissal, so a bus cancellation does not automatically close schools.
- For transportation, WRDSB defines frigid conditions as a forecast wind chill of -35°C or colder at 7:00 AM; buses may be cancelled while schools stay open.
Local guidance reviewed November 2, 2026. Official school-board and transportation notices always take priority over this estimate.
Chance of a snow day in Waterloo
The estimate above is driven by the forecast for Waterloo, 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 Waterloo 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.