St. Catharines Average Rainfall by Month

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

What's the Rainiest Month in St. Catharines?

In St. Catharines, June has the greatest precipitation of any month. On average, St. Catharines gets 8.1 cm of precipitation in June.

However, January is the month with the greatest chance of precipitation. 39.5% of days in January will have at least some rain.

What's the Driest Month in St. Catharines?

In St. Catharines, February has the least precipitation of any month. On average, St. Catharines gets 3.22 cm of precipitation in February.

August is the month with the lowest chance of precipitation. 29.3% of days in August will have measurable rain.

Weather Station Details

Years	Station	Coordinates
1995–2024	Port Weller (AUT)	location
1882–1994	St Catherines	location