Home › Weather › Weather Near Markham, On
Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Perspective Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Near Markham, Ont., conditions have shifted noticeably from yesterday’s mild pace, with the live forecast above showing a cooler, unsettled pattern settling in across the northern reaches of the Greater Toronto Area.
What is driving this change in the forecast for Markham and surrounding communities?
A low-pressure system moving south from Georgian Bay is drawing moisture and cooler air across York Region, bringing widespread cloud cover and the chance of intermittent showers through the evening. Residents between the Rouge River valley and Lake Simcoe should see temperatures a few degrees below seasonal norms, with breezy northwesterly winds making it feel brisk by late afternoon. The system is expected to clear by midweek, giving way to drier conditions into Thursday.
How should I prepare for the upcoming weather pattern near Markham?
Keep a light jacket or sweater handy, especially if you are out near the Don River headwaters or farming areas north of Highway 7. With lake-effect clouds lingering from Lake Ontario, visibility may drop during heavier showers, so drivers on stretches of the 404 and 407 should allow extra travel time. No significant frost is anticipated, but overnight lows will dip close to single digits. Check the Toronto Weather page for regional updates and the Weather Warning page if advisories are issued.
Will the rain near Markham last all day?
Showers are expected to be intermittent rather than steady, with the heaviest moisture arriving in the late morning and tapering off by early evening. Brief dry periods are likely mid-afternoon, but clouds will remain thick.
Is there a chance of thunderstorms?
The chance is low. This system lacks the instability needed for thunderstorm development over southern Ontario. Any embedded rumbles would be isolated and mainly south of Lake Ontario, though not entirely ruled out near Markham.
When will the sun return to Markham?
Clearing is expected by Thursday morning as high pressure rebuilds from the west. Thursday afternoon should bring sunshine and near-seasonal temperatures, offering a pleasant break before the next system arrives.