Toronto Snow Day Predictor — TDSB & GTA School Board Closure Forecast
Toronto Snow Day Predictor
Canada's most accurate snow day predictor
Will Toronto Schools Be Closed Tomorrow?
Toronto is home to Canada’s largest school board — the Toronto District School Board (TDSB) — serving approximately 235,000 students across 582 schools. Despite averaging 130 cm of snow per year and sitting on the north shore of Lake Ontario, Toronto has one of the lowest school closure rates of any Ontario city that receives significant snowfall. The city’s extensive road maintenance fleet, Toronto Transit Commission network, the walkability of many central neighbourhoods, and the sheer political and logistical complexity of closing 582 schools at once all mean the TDSB raises the bar for closures higher than smaller surrounding boards.
That said, when a major winter system strikes — a nor’easter tracking up the eastern seaboard, a Lake Ontario snow band targeting the lakeshore, or a rapid deepening low-pressure system — the GTA’s multiple boards can all close simultaneously, affecting over one million students in a single coordinated decision.
Toronto School Boards We Cover
- Toronto District School Board (TDSB) — Canada’s largest board. 235,000 students, 582 schools. tdsb.on.ca | Announces: by 6:00 AM | Radio: 680 NEWS (CFTR 680 AM) and CP24 | Twitter/X: @tdsb
- Toronto Catholic District School Board (TCDSB) — Serves Toronto’s Catholic families alongside TDSB territory. tcdsb.org | Twitter/X: @TorontoCatholic
- Peel District School Board — Brampton, Mississauga, Caledon. peelschools.org | Makes independent decisions from TDSB but usually aligns
- York Region District School Board (YRDSB) — Markham, Vaughan, Richmond Hill, Newmarket, Aurora, King, Georgina, East Gwillimbury. yrdsb.ca
- Durham District School Board (DDSB) — Oshawa, Ajax, Whitby, Pickering, Clarington, Port Perry. ddsb.ca
- Halton District School Board (HDSB) — Oakville, Burlington, Milton, Halton Hills. hdsb.ca
Why Toronto Has Fewer Snow Days Than You’d Expect
Three factors keep Toronto’s closure rate lower than other Ontario cities with comparable snowfall: First, Toronto’s urban snow removal infrastructure is among the best in Canada — 550+ pieces of equipment, 24/7 operations during significant events, and pre-treated roads before major storms. Second, a significant portion of TDSB students live within walking distance of their school or use TTC — the closure decision doesn’t rest solely on bus safety. Third, there is simply more resistance to closing 582 schools and 250,000 students at once; the threshold for “severe enough to close” is genuinely higher.
Toronto Snow Day History
The TDSB averages approximately 3–5 school closure days per year — among the lowest of any Ontario board with significant snowfall. Notable recent closures include the January 2022 event (30+ cm in 24 hours across the GTA), the January 2019 back-to-back closures (two rapid-succession storms), and the February 2016 blizzard event. The TDSB has not had a February without snow days in recent memory, but full December and March closures are genuinely rare.
When Does the TDSB Announce?
TDSB closure decisions are announced by 6:00 AM on the morning of the event. Primary channels: tdsb.on.ca, SchoolMessenger (email/phone/text to registered families), 680 NEWS radio, and CP24 television. The TDSB Twitter/X account (@tdsb) is often updated 10–15 minutes before the website. For advance storm notices, monitor from 10:00 PM the night before.
Our predictor is most accurate when checked at 9:00 PM the night before and again at 5:00 AM on the morning of the storm — after the overnight weather model run has updated.
Nearby GTA Cities
- Mississauga Snow Day Predictor — Peel District School Board
- Brampton Snow Day Predictor — Peel District School Board
- Barrie Snow Day Predictor — SCDSB (1 hour north — very different closure pattern)
- Hamilton Snow Day Predictor — HWDSB (southwest of Toronto)
- Ottawa Snow Day Predictor — OCDSB (eastern Ontario)
Frequently Asked Questions — Toronto Snow Days
Does the TDSB close less often than surrounding boards?
Yes — the TDSB historically has a lower closure rate than suburban and regional boards like York Region, Durham, and especially boards further north like SCDSB in Barrie. Urban density, better road infrastructure, and higher student walkability all contribute to the TDSB’s higher closure threshold.
If TDSB closes, do Peel and York Region close too?
Usually but not always. GTA boards make independent decisions. In major storm events all GTA boards typically align. In borderline events, one board may close while others remain open. Always check your specific board’s website regardless of what neighbouring boards announce.