Home › Weather › Sudbury On Weather
Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Civic Maple Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Check the live forecast above for today’s conditions before heading out. Sudbury’s weather shifts quickly with lake effects from Georgian Bay, so plan for sudden changes in temperature and precipitation.
What makes Sudbury’s weather different?
Sudbury sits near the edge of the Canadian Shield, and its position around Georgian Bay and Lake Nipissing creates frequent lake-effect clouds and snow. Winters are cold and snowy, with average highs around -8°C in January. Summers are warm but brief, with July highs near 25°C. The city gets about 120 cm of snow annually, mostly from November through March.
How to use the 7-day and 14-day forecasts
For daily plans, rely on the Canada weather hub and the live forecast above. The sudbury weather 7 days outlook gives a reliable short-term picture. For longer-range planning, the sudbury weather 14 day and sudbury weather 30 day forecast show general trends but can shift due to lake effects. Check weather in sudbury tomorrow each evening for the next morning’s conditions.
Nearby weather connections
Sudbury’s weather often mirrors parry sound weather to the west, as both are influenced by Georgian Bay. For a broader regional view, see weather in greater sudbury 10 days on the live forecast. For current events tied to weather, browse sudbury news for road closures or storm warnings.
Does Sudbury get more snow than other Ontario cities?
Yes. Sudbury averages about 120 cm of snow per year, more than Toronto (roughly 100 cm) but less than areas like Sault Ste. Marie (over 200 cm). Lake-effect snow from Georgian Bay is the main reason.
When is the best time to visit Sudbury for mild weather?
Late June through early September offers the warmest and most stable weather, with July highs near 25°C. Spring and fall are cooler and rainier, with frost possible into May and returning by mid-October.
How reliable are 30-day forecasts for Sudbury?
Long-range forecasts, including the sudbury weather 30 day forecast, show general temperature and precipitation trends but are less reliable for daily specifics. Lake effects make week-ahead changes common, so treat 30-day outlooks as rough guides.