Weak to moderate overnight snowfall will leave light accumulations across southern Ontario and into the Great Lakes region. Durham, ON can expect a few centimeters with lingering slick spots on untreated roads; plan for a cautious morning commute and possible bus delays. Elsewhere in Ontario and nearby areas, snow totals remain light (generally under 5 cm) with breeze, so major travel disruption is unlikely, but kids should still bundle up and allow extra time. No freezing rain or severe wind events are anticipated in the core region, though scattered flurries and light snow may continue into mid‑morning. Stay tuned for updates as conditions can vary with local flurries and minor gusts.
Stop relying on outdated “magic number” calculators. Snow Day Predictor is the 2026 standard for school closing probabilities, built on the same ultra-high-resolution weather engine that powers the world’s most popular smartphones.
While other sites give you a generic percentage based on total snowfall, we analyze hour-by-hour atmospheric changes to tell you exactly when the roads will become impassable.
Most snow day calculators use global models that only update every 6 to 12 hours. In a fast-moving winter storm, that data is obsolete before you even wake up. Our system leverages ultra-precision hourly data to track the “Morning Crunch”—the critical window between 4:00 AM and 7:00 AM that determines whether a superintendent calls for a closure or a delay.