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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 before heading out. Kingston weather shifts quickly due to Lake Ontario, so plan for changing conditions. Hourly updates and radar imagery help you time outdoor activities around rain, snow or wind.
What is Kingston’s typical weather pattern?
Kingston has a humid continental climate with four distinct seasons. Summers are warm and humid, averaging 25°C in July. Winters are cold, with January highs near –5°C. Spring and fall bring moderate temperatures but frequent rain, thanks to the lake’s influence. For kingston weather hourly details, rely on the live forecast above.
How does Lake Ontario affect the city?
Lake Ontario moderates temperatures year-round, keeping winters slightly milder than inland areas and summers cooler near the shore. It also fuels lake-effect snow, especially from November to January, when cold air crosses the open water. Kingston ontario weather radar can show snow bands developing off the lake.
When is the best time to visit Kingston?
Late May to early October offers the most comfortable weather, with daytime highs between 18°C and 27°C. July and August are warmest but can be humid. September brings crisp, sunny days ideal for sightseeing.
Does Kingston get lake-effect snow?
Yes. When cold Arctic air sweeps over Lake Ontario, heavy snow can fall in Kingston, especially from the west or northwest. Bands can drop 5–10 cm per hour, making driving hazardous. Check the kingston ontario weather radar for real-time tracking.
What are average monthly temperatures in Kingston?
January: –8°C average; April: 7°C; July: 21°C; October: 10°C. For a full breakdown of kingston ontario weather by month, consult Environment Canada’s climate normals. Day-to-day variation is large, so always check the live forecast above.
Sources
For broader forecasts, visit our Canada weather hub. If you need a longer outlook, see our Weather 10 Days page for a kingston weather 14 day trend. Also check Victoria BC Weather for a coastal comparison.