May Rainfall and Precipitation in Ontario
Ontario Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ontario - and find the best time to visit. See also: Ontario weather by month.
Best Places to Visit in Ontario in May
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Ontario.
Monthly precipitation
0 mm (0 in) dry → 150 mm (5.9 in) wet
Marker color shows total monthly precipitation in May: pale blue is dry, deep blue is wet.
Ontario precipitation in May: frequently asked questions
How much rainfall does Ontario, Canada receive in May?
In May, Toronto typically receives modest rainfall, around 80 mm (3.1 in), making this a relatively dry month.
How many days does it rain in Ontario, Canada in May?
Expect around 11 days rainy days in Toronto during May.
Is May part of the rainy season in Ontario, Canada?
No. May sits outside the typical rainy season in Ontario, Canada, so you can expect drier conditions overall.
What is the wettest city in May in Ontario, Canada?
Looking at our data, London tops the wettest-cities list in Ontario, Canada for May, with monthly rainfall averaging 102 mm (4 in).
What is the driest city in May in Ontario, Canada?
The driest place is Niagara on the Lake with an average rainfall of 47 mm (1.9 in) according to our data.
Interested in more climate information?
We have much more information about the climate in Ontario.
Weather and climate has detailed information for every country in the world. Are you going to Canada? Get detailed historical weather averages for many cities in Canada.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Visit Algonquin Park
Algonquin park is one of the best places to experience the Canadian wilderness and learn more about the nation’s cultural history. It is open year round and offers a variety of activities depending on the season.
Canada in September: Where Is the Best Weather?
Compare September weather in Toronto, Montreal, Vancouver, Quebec City and Osoyoos to find Canada's warmest, driest and sunniest destinations.
Canoeing the south Nahannii
The South Nahanni in the northwest of Canada is one of the most impressive wilderness rivers in the world. Canoeing the south Nahanni is something you must add to your bucket list.
See Polar Bears in Churchill Canada
Thousands of bears gather at the small town of Churchill. In the evening the northern lights give a light show against the dark evening sky. An unforgettable experience.