Oshawa Average Rainfall by Month

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

Average temperature by month

What's the Rainiest Month in Oshawa?

In Oshawa, April has the greatest precipitation of any month. On average, Oshawa gets 8.0 cm of precipitation in April.

However, November is the month with the greatest chance of precipitation. 43.7% of days in November will have at least some rain or snow.

What's the Driest Month in Oshawa?

In Oshawa, February has the least precipitation of any month. On average, Oshawa gets 4.63 cm of precipitation in February.

February is also the month where rain is least common. 33.0% of days in February will have measurable rain or snow.

Month	Precipitation	% Chance
January	6.22 cm	43.2
February	4.63 cm	33.0
March	5.14 cm	34.0
April	8.04 cm	41.7
May	7.59 cm	38.8
June	7.54 cm	34.4
July	7.40 cm	34.3
August	6.99 cm	33.3
September	7.97 cm	35.1
October	7.21 cm	43.7
November	6.73 cm	43.7
December	5.89 cm	40.5
Year	81.51 cm	38.1

Weather Station Details

Years	Station	Coordinates
2010–2024	Oshawa	location
1970–2009	Oshawa WPCP	location
1882–1969	Oshawa	location