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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the BuzzLayer Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Kingston will see a mix of sun and cloud today with temperatures near seasonal, influenced by Lake Ontario and the St. Lawrence River. Check the live forecast above for the exact high and chance of showers.
What is driving today’s weather in Kingston?
A weak ridge of high pressure over eastern Ontario is keeping conditions mostly dry, but lake breezes off Lake Ontario and the St. Lawrence will keep the waterfront a few degrees cooler than inland neighbourhoods like Amherstview or the Cataraqui area. Expect light northwest winds shifting to southwest by late afternoon.
How will the rest of the week look?
Another system moves in Wednesday night, bringing rain likely by Thursday morning. Temperatures stay near the seasonal average of 7°C for early April, with overnight lows around 1°C. Friday may see clearing and a slight warm-up.
Will Kingston see any frost tonight?
Overnight lows near 1°C mean patchy frost is possible in low-lying areas away from the lake, especially north of Highway 401. Cover sensitive plants if you have them.
Is the UV index high enough for sunscreen?
The UV index today is moderate (3–4). If you’re spending time outdoors near the waterfront or on the Kingston Waterfront Trail, a light sunscreen is advised.
How does Lake Ontario affect Kingston’s forecast?
Lake Ontario moderates temperatures year-round, keeping spring afternoons cooler and delaying frost compared to inland communities like Smiths Falls. Lake breezes can also trigger local cloud bands.
Sources
For broader conditions across the province, visit our Canada weather hub or check the forecast for Toronto and Ottawa.