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Snow day predictor for Ontario

Snow-day and bus forecasts for Ontario, where boards and transportation consortia often decide separately.

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Press Enter to check what you typed. A postal code does not need a suggestion. A board is only a link to that board's page. It does not change this forecast.

Toronto, Ontario

Updated Nov 4, 2026, 6:28 p.m.. Matched Toronto. typical snow tolerance (snow points × 1). standard cold sensitivity.

The morning decision window has passed in this time zone. Tomorrow is the score to watch.

0%Snow day chance

School is probably on

Pack your bag. This forecast does not suggest a closure.

Buses: 0% chance of a cancellation or delay. Higher confidence.

0.0 cmSnowfall
0.0 cm/hPeak intensity
15.4°C8 a.m. temperature
15.0°CWind chill
19 km/hWind
1920212223012345678
Snowfall · 0 pts
Overnight timing · 0 pts
Temperature and wind chill · 0 pts
Freezing rain · 0 pts
Wind · 0 pts

Biggest factor: nothing strong in the overnight window.

What should I do? Pack the school bag. Still check your board in the morning in case the buses are cancelled.

Advanced: adjust the forecast

Weather data: Open-Meteo. Canadian postal codes use OpenStreetMap Nominatim. This is an estimate, not a school-board announcement. Estimate only. Check your board.

Ontario does not flip one provincial switch for a snow day. District school boards decide whether schools are open. Student transportation consortia, which the boards form together, often decide whether the buses run. Those can be different decisions: a cancelled bus and an open school is a normal Ontario winter morning, not a contradiction.

The weather is not one climate. Toronto is moderated by Lake Ontario. Barrie, the London region, and the Georgian Bay and Lake Huron shores sit in lake-effect snow belts and are used to bigger totals. Ottawa is colder. Windsor sees less snow and more ice. The predictor keeps a saved profile for the cities on this site and uses a typical Ontario default everywhere else, which can overstate a closure in a town that shrugs off 15 cm.

Announcement habits differ by consortium. Some publish a target window; others simply say they post when the decision is made. Treat any clock time on a consortium site as their current practice, and still look at that site in the morning. This page cannot promise a time.

Official sites

Cities

  • Toronto — Snow-day and bus forecast for Toronto, where the lake moderates storms and many students walk.
  • Mississauga — Snow-day forecast for Mississauga, served by Peel boards and Student Transportation of Peel Region.
  • Brampton — Snow-day forecast for Brampton, inland of the lake and on the Peel boards' bus network.
  • Ottawa — Snow-day forecast for Ottawa, a colder city where OC Transpo is not the school-bus system.
  • Hamilton — Snow-day forecast for Hamilton, including the escarpment and the city school boards.
  • London — Snow-day forecast for London, on the Lake Huron snow-belt side of southwestern Ontario.
  • Kitchener — Snow-day forecast for Kitchener and the Waterloo Region public board's bus network.
  • Waterloo — Snow-day forecast for Waterloo, sharing a board and bus consortium with Kitchener.
  • Guelph — Snow-day forecast for Guelph and the Upper Grand District School Board.
  • Barrie — Snow-day forecast for Barrie, in the Georgian Bay lake-effect snow belt.
  • Sudbury — Snow-day forecast for Greater Sudbury, tuned for heavy snow and real cold.
  • Sault Ste. Marie — Snow-day forecast for Sault Ste. Marie, a lake-effect city on the St. Marys River.
  • Thunder Bay — Snow-day forecast for Thunder Bay, where lake-effect snow and cold are both normal.
  • Windsor — Snow-day forecast for Windsor, a milder corner of Ontario where ice often beats snow.
  • Kingston — Snow-day forecast for Kingston, on Lake Ontario's eastern winter shore.

School boards on this site

Related reading

All guides

Questions parents ask

Who announces an Ontario snow day?

Your school board announces a school closure. The transportation consortium that serves the board usually announces bus cancellations. School Bus Ontario publishes a directory of those consortia if you are not sure which one covers your address.

Does a cancelled bus mean the school is closed?

Often it does not. Many Ontario boards keep schools open when buses are cancelled and leave the trip to families. Read the board's own inclement-weather note before you treat a bus cancellation as a day off.