Ontario Weather in May
With daytime temperatures of 26°C (79°F) and nighttime lows of 12°C (54°F), May in Ontario brings high temperatures during the day. The perfect weather makes it an appealing time to visit.
Rainfall in Ontario in May
Typically, about 2 days will experience rainfall, with an average of 7.1 mm (0.3 in) for the month. When rain does fall, showers tend to be light and brief. Most days will be dry.
Temperature in Ontario in May
May in Ontario is generally perfect, with days reaching 26°C (79°F) and nights settling around 12°C (54°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Ontario in May
There are approximately 311 hours of sunshine this month, resulting in mostly clear days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, May, October and November typically offer the best weather for Ontario.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Ontario's climate page.
Ontario Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
26°C (79°F)
Chance of Rain
7%
Precipitation
7.1 mm (0.3 in)
Rainy days
2 days
Sunshine
311 hours *
Percentage Sunshine
*
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
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What to Wear in Ontario in May
Warm but pleasant conditions in Ontario in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Dry conditions mean you won't need to worry about rain protection. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Ontario in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Ontario's climate page.
See the full Ontario climate overview or explore weather in the United States of America.
