London Ontario 5 Day Weather Forecast 2025 Weather Forecast. Find daytime highs and nighttime lows from theweathernetwork.com. Current conditions and forecasts including 7 day outlook, daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill (when applicable) historical data,.

Snowfall will be below average in the east and above average in the west. Check the temperatures, chance of rain and more in ontario during january.