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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Edition Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The hourly forecast above shows a steady afternoon for Markham, with temperatures lingering near the early peak and cloud cover thickening toward dusk. For those checking the weather in Markham today, the remainder of the daylight hours should remain dry, making it a fine stretch for outdoor plans.
How will the rest of today’s hourly forecast shape up?
According to the live forecast above, conditions hold through the mid-afternoon with a light breeze off the eastern shores of Lake Ontario. By early evening, a modest temperature dip begins, though the chance of precipitation stays low until after midnight. For a longer view, consult the weather markham 14 days outlook or the Canada weather hub to plan ahead.
What about overnight and tomorrow’s hourly conditions?
Overnight hours in Markham bring gradually cooler readings, with the hourly steps showing a steady drop of a couple of degrees each hour. The weather in Markham tomorrow opens with partly cloudy skies; the live forecast above will refresh with morning details. If you need a broader picture, the markham weather 7 day forecast is also available.
How often is the hourly forecast for Markham updated?
Environment and Climate Change Canada refreshes its hourly forecast several times daily, often every 6 hours with interim updates when conditions change rapidly. For the most current look, rely on the live forecast above or check weather markham 14 days hourly data.
Is the hourly forecast reliable for planning tomorrow’s commute?
For a commute starting early in the morning, the hourly forecast from Environment Canada generally offers solid guidance for the next 12 to 24 hours. However, near-term updates—especially those within six hours—tend to be most accurate. For longer planning, combine the hourly data with a markham weather 30 day trend.
Where does the hourly forecast data come from?
The hourly forecast for Markham is derived from Environment and Climate Change Canada’s high-resolution modelling, supplemented by regional observations from the Toronto area. The same data feeds The Weather Network and other trusted sources, but the live forecast above pulls directly from the government service.