Weather in May 2025

Ontario weather in May 2025

The temperatures in Ontario in May are quite cold with temperatures between 9°C and 16°C, warm clothes are a must.

You can expect about 3 to 8 days of rain in Ontario during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Ontario in May 2025.

If you’re planning to visit Ontario in the near future, we highly recommend that you review the 14 day weather forecast for Ontario before you arrive.

Temperatures
Temperatures
16° / 9°
Rainy Days
Rainy Days
7
Snowy Days
Snowy Days
0
Dry Days
Dry Days
24
Rainfall
Rainfall
100
mm
9.8
Sun Hours
9.8
Hrs

Ontario annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January -2° / -7° 6 9 17 54 mm
Awful
February -2° / -7° 5 8 15 46 mm
Awful
March 4° / -2° 7 15 9 63 mm
Awful
April 9° / 3° 8 18 4 82 mm
Awful
May 16° / 9° 7 24 0 100 mm
Ok
June 21° / 14° 7 23 0 120 mm
Ok
July 25° / 19° 7 24 0 128 mm
Good
August 25° / 19° 5 26 0 114 mm
Perfect
September 22° / 15° 5 25 0 74 mm
Good
October 15° / 9° 7 23 0 88 mm
Ok
November 8° / 3° 5 19 5 50 mm
Bad
December 2° / -2° 7 11 13 52 mm
Awful
Temperatures in Ontario in May
Rain in Ontario in May

Recommended Hotels in Ontario

We know that finding the ideal hotel in Ontario can be a hard task...

That’s why we run our special tools and found the best hotels in Ontario. Click on hotel for more details.

Weather in Ontario in May - FAQ

What is the average temperature in Ontario in May?
The average temperature in Ontario in May is 9/16° C.
What is the chance of rain in Ontario in May?
On average, there are 7 rainy days in Ontario during May.
Weather wise, is May a good time to visit Ontario?
The weather in Ontario in May is ok.
Can it snow in Ontario in May?
On average, there are 0 snowy days in Ontario in May.
Cities in Ontario

For a more accurate weather forecast please select a city

See more locations
More about the weather in Ontario