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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.

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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 TemperatureMin Temperature 12°C (54°F)  
Max TemperatureMax Temperature 26°C (79°F)  
Chance of RainChance of Rain 7%  
PrecipitationPrecipitation 7.1 mm (0.3 in)  
Rainy daysRainy days 2 days  
SunshineSunshine 311 hours *  
Percentage SunshinePercentage Sunshine *  
* Data from: Corona, the United States of America (22 KM, 13 Miles).

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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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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.

Swimming
10/10
Cycling
8/10
Walking
8/10
Barbeque
10/10
Camping
10/10
Outdoor sports
8/10

Select a Month

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.

More climate data for Ontario