60-Day Extended Weather Forecast for Southern Ontario

Free 2-Month Weather Forecast

September 2025 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Sep 1-5Heavy t-storms, then sunny; mild
Sep 6-13T-storms north, rainy south; turning cool
Sep 14-20Rainy, chilly
Sep 21-23Sunny, chilly
Sep 24-30Sunny north, rain east; turning chilly
Septembertemperature 13°C (2°C below avg.)
precipitation 120mm (60mm above avg. north, avg. south)
October 2025 Long Range Weather Forecast for Southern Ontario
DatesWeather Conditions
Oct 1-3Sunny, chilly
Oct 4-10A few showers, chilly
Oct 11-15Sunny NW, rainy SE; warm
Oct 16-20A few t-storms, warm
Oct 21-31Sunny, then a little rain and snow; warm to chilly
Octobertemperature 9°C (1°C below avg.)
precipitation 65mm (10mm below avg.)
Map showing Old Farmer's Almanac long range weather region number 3

The 12-Month Long-Range Weather Report From The 2025 Old Farmer's Almanac

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 predictions in The Old Farmer's Almanac.

Weather Trend Graph

November 2025 to October 2026

Weather Trend Graph for Southern Ontario
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