London Ontario 30 Day Weather Forecast 2025 Forecast

London Ontario 30 Day Weather Forecast 2025 Forecast. Snowfall will be below average in the east and above average in the west. Weather.com brings you the most accurate monthly weather forecast for london, ontario, canada with average/record and high/low temperatures, precipitation and more.

30dayweather long range weather forecasts predict ideal conditions for a storm. See the long range weather forecast for ontario, check the 30 days forecast view, select a month and get the average expected weather for ontario.