Forecast For London Ontario 2025 Forecast. Discover the most accurate weather forecast for london in october 2025. Myforecast is a comprehensive resource for online weather forecasts and reports for over 72,000 locations worldcwide.

Snowfall will be below average in the east and above average in the west. Ontario residents may want to brace themselves ahead of this year’s snowy season, as the 2025 old farmer’s almanac canadian edition predicts some rough weather in.