Posted in Web 10-day weather forecast for London, Ontario – The Weather Channel June 21, 2025 Be prepared with the most accurate 10-day forecast for London, Ontario with highs, lows, chance of precipitation from The Weather Channel and Weather.com https://weather.com/en-CA/weather/tenday/l/London+Ontario?canonicalCityId=4a2e47e1d0c3e39900f7420321bfe65a