Snow Day Predictor MississaugaWill school be cancelled tomorrow in Mississauga?

Type your Mississauga postal code or "Mississauga, Ontario" into the predictor above. Peel District School Board closes its buildings only a few times per winter, typically for Colorado low storms with 25+ cm of overnight snow, significant freezing rain, or extreme wind chill. The more common signal is the STOPR bus cancellation probability, which is called between 5:30 and 6:00 am the morning of. Both probabilities are shown in the result so you can plan the morning the night before.

For the official call, check the STOPR bus delay portal at stopr.ca or the Peel DSB and DPCDSB social feeds. STOPR announces bus cancellations between 5:30 and 6:00 am the morning of, applicable to both Peel DSB and Dufferin-Peel Catholic routes across Mississauga, Brampton, and Caledon. Our predictor gives you an advance probability the night before based on the overnight forecast, so you do not have to wait for the morning announcement to make backup plans.

Mississauga and Toronto share most major storm patterns, but two local factors push the forecasts apart. Toronto Pearson, at the north edge of Mississauga, regularly records the coldest GTA temperatures, so freezing-rain transitions happen later in Mississauga than along the Toronto lakeshore. Lake-effect snow off Lake Ontario is also less direct in Mississauga than in Scarborough or Pickering, so lake-effect-driven bus cancellations affect Toronto more often than Peel. Colorado low events generally hit both cities about equally.

Almost always yes. Peel DSB and Dufferin-Peel Catholic both operate across Mississauga, Brampton, and Caledon as single regional systems, and STOPR coordinates buses for the entire Peel Region. When weather is bad enough to close Peel DSB in Mississauga, the same call applies in Brampton and Caledon, and the same STOPR bus cancellation covers all three municipalities. Differences are rare and usually involve very localized lake-effect or fog events, not full closures.

Square One and the surrounding City Centre are roughly in the geographic middle of Mississauga, between the lakeshore and Pearson. Conditions there are usually a fair indicator of the city-wide call, but the area sits in a transition zone for freezing-rain events because temperatures aloft can vary by a few degrees between the lake and the airport. Our predictor uses your exact postal code rather than a city-wide average, which matters most for downtown Mississauga during borderline mixed-precipitation storms.

Toronto Pearson International Airport sits on Mississauga’s northern boundary and is the official reporting station for the GTA. Because it is often the coldest spot in the region, Environment Canada warnings keyed to Pearson temperatures (wind chill, extreme cold) can trigger Peel DSB and STOPR decisions even when the lakeshore is several degrees warmer. Neighbourhoods near Pearson, including Malton, Northeast Mississauga, and parts of Meadowvale, see the harshest conditions on cold-snap mornings.

Most of the time, yes. Both boards share STOPR for transportation and serve the same three municipalities, and they communicate closely on weather days. It is possible for one board to keep buildings open while the other closes, especially for events that affect a specific subset of schools, but full network-wide divergence is uncommon. STOPR bus cancellations always apply to both boards simultaneously because they share the same buses.