London Average Rainfall by Month

This page shows the average precipitation in each month of the year in London, Ontario. It is based on NOAA data for the years 1991–2020.

What's the Rainiest Month in London?

In London, May has the greatest precipitation of any month. On average, London gets 8.9 cm of precipitation in May.

However, January is the month with the greatest chance of precipitation. 62.9% of days in January will have at least some rain.

What's the Driest Month in London?

In London, February has the least precipitation of any month. On average, London gets 6.21 cm of precipitation in February.

August is the month with the lowest chance of precipitation. 33.2% of days in August will have measurable rain.

Weather Station Details

Years	Station	Coordinates
2002–2024	London CS	location
1941–2002	London International Airport	location
1932–1940	London Lambeth A	location
1883–1931	London South	location