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Long-Range Weather Forecast for Southern Ontario

60-Day Weather Forecast

August 2026 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Aug 1-9T-storms, warm
Aug 10-16Sunny; cool east, warm west
Aug 17-21Isolated t-storms, warm
Aug 22-26T-storms, warm
Aug 27-31T-storms east, sunny west; cool
Augusttemperature 20°C (1°C below avg. east, 1°C above west)
precipitation 125mm (70mm above avg. east, 20mm above west)
September 2026 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Sep 1-4Sunny east, rainy west; cool
Sep 5-8T-storms, warm
Sep 9-16Showers east, sunny west; cool
Sep 17-23Showers, then sunny; cool
Sep 24-30Rainy, chilly
Septembertemperature 15°C (1°C below avg.)
precipitation 115mm (25mm above avg.)
Map showing Old Farmer's Almanac long range weather region number 3

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

Weather Trend Graph for Southern Ontario
The Old Farmer's Almanac Store