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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the True North Brief Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Tomorrow in Markham expect a high near the mid‑teens and a low around 4 °C, with a 60 % chance of afternoon showers, as shown in the live forecast above. A Pacific trough brings unsettled conditions, so keep an umbrella handy through the late morning and early evening.
What will the hourly breakdown look like?
Morning temperatures start near 8 °C under mostly cloudy skies. Showers become likely by mid‑day, with the best chance between 1 p.m. and 5 p.m. Winds from the southwest at 20 km/h gusting to 35 km/h will keep conditions mild but breezy. By evening the rain tapers, leaving a partly cloudy night with a low of 4 °C. For a more detailed look, refer to our weather tomorrow Toronto page, which covers the broader GTA pattern that influences Markham.
How does this compare to the rest of the week?
Tomorrow’s unsettled weather is a one‑day break before a ridge builds Thursday, pushing highs back to the low 20s. If you’re planning further ahead, check Canada weather hub for the Markham weather 7‑day and the weather network Markham 14‑day outlook. The 30‑day signal suggests near‑normal temperatures for late April, so tomorrow’s rain is not a sign of a prolonged wet spell.
Should I expect any snow tomorrow in Markham?
No. With afternoon highs in the mid‑teens and overnight lows of 4 °C, all precipitation will fall as rain. The freezing level stays well above the surface.
Where can I get updated weather Markham hourly data?
The live forecast above refreshes automatically from Environment Canada. For on‑the‑hour conditions, you can also use the weather tomorrow Ottawa reference page for comparison, though Markham’s data is specific to York Region.
Will tomorrow’s rain affect my morning commute?
Light showers are possible as early as 10 a.m., but the heavier bands arrive around noon. If you drive Highway 407 or Don Valley, allow extra time and reduce speed on wet pavement.