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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 ·
Kleinburg, just north of Toronto in Vaughan, is seeing conditions typical for the Humber River valley today. The live forecast above shows the current temperature and sky cover, with a notable chance of lake-effect cloud drifting in from Lake Ontario later this afternoon.
What is driving today’s weather in Kleinburg?
Kleinburg sits near the Oak Ridges Moraine, which often keeps it a degree or two cooler than downtown Toronto. The live forecast above reflects a passing system moving east across southern Ontario, bringing a mix of sun and cloud. Winds off Lake Ontario can funnel moisture up the Humber Valley, so isolated flurries or drizzle are possible even when the rest of the GTA stays dry. For a broader view of conditions across the region, check the Toronto weather page.
How does Kleinburg compare to nearby communities?
Residents often notice Kleinburg runs cooler than Mississauga weather or Barrie weather, thanks to its elevation and tree cover. The weather network Kleinburg hourly data typically shows a sharper evening drop than urban centres. If you’re tracking the kleinburg weather hourly, expect the wind to shift after sunset. For a longer outlook, the kleinburg weather 14 day trend suggests a gradual cooling pattern by midweek.
Why is Kleinburg often colder than Toronto?
Kleinburg’s higher elevation on the Oak Ridges Moraine and distance from Lake Ontario’s warming effect mean it loses heat faster at night, often 3–5°C cooler than downtown Toronto under clear skies.
Does the Humber River affect Kleinburg fog?
Yes. On calm, humid mornings, the river valley can trap fog or low cloud, especially in spring and fall. This can reduce visibility along Islington Avenue and Major Mackenzie Drive.
Where can I find reliable Kleinburg radar?
Environment and Climate Change Canada’s King City radar (about 15 km north) provides the best coverage. For real-time updates, see the weather warning page for any watches.