Long-Range Weather Forecast for Southern Ontario

May 2026 Long Range Weather Forecast for Southern Ontario

Dates	Weather Conditions
May 1-9	Sunny, then showers; cool
May 10-16	Sunny, turning warm
May 17-25	A few showers, cool
May 26-31	Scattered t-storms, warm
May	temperature 11°C (1°C below avg.) precipitation 90mm (30mm above avg. north, 10mm below south)

June 2026 Long Range Weather Forecast for Southern Ontario

Dates	Weather Conditions
Jun 1-8	Showers, cool
Jun 9-18	T-storms; warm, then cool
Jun 19-21	Sunny, cool
Jun 22-30	T-storms, then sunny; hot
June	temperature 16.5°C (1°C below avg.) precipitation 110mm (30mm above avg.)

12-Month Long-Range Weather Outlook

November 2025 to October 2026

Winter will be colder and drier than normal in the east with below-normal snowfall, while it will be warmer than normal in the west with above-normal precipitation and snowfall. The coldest periods will be in mid- and late December, early and late January, and early February, with the snowiest periods in late November and early and mid-February. April and May will be cooler than normal, with above-normal precipitation in the north, below-normal south. Summer will be cooler than normal in the east and warmer west, with the hottest periods in late June and early July. Precipitation will be above normal. September and October will be cooler than normal, with above-normal precipitation.

See the complete 12-month weather forecast in The Old Farmer’s Almanac..

Weather Trend Graph

November 2025 to October 2026