Ontario weather in May
Planning a getaway to Ontario this May and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:
What is the weather like in Ontario in May?
Ontario is a region in Canada. Ontario offers a broad spectrum of weather patterns. In May, one might encounter temperatures that range from cold to pleasant, and precipitation levels ranging from moderate to high.
The average maximum daytime temperatures vary from cold in Schreiber at 9°C to pleasant in Kemptville at 21°C. Nighttime temperatures generally drop to 8°C in Kemptville and 3°C in Schreiber.
In May, precipitation varies across different areas. From moderate rainfall in Niagara on the Lake with an average of 47 mm to high rainfall in London with 102 mm. Meanwhile, Toronto enjoys close to 227 hours of sunlight. This means it's a great month if you prefer bright and sunny days.
For a closer look at May's conditions in Ontario, see the map below. For a more detailed look at Ontario's yearly weather, check out our Ontario climate page.
Where to go in Ontario in May
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Popular destinations in Ontario
What is the weather like in May for the 5 most popular destinations in Ontario?
Average weather in Toronto
In May Toronto generally has moderate temperatures with maximum daytime temperatures around 16°C, minimum nighttime temperatures around 8°C and moderate monthly rainfall. So on average the conditions are tolerable that month.
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Average weather in Ottawa
In May Ottawa generally has pleasant temperatures with maximum daytime temperatures around 20°C, minimum nighttime temperatures around 7°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Average weather in Niagara Falls
In May Niagara Falls generally has pleasant temperatures with maximum daytime temperatures around 21°C, minimum nighttime temperatures around 9°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Average weather in Mississauga
In May Mississauga generally has moderate temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 8°C and moderate monthly rainfall. So on average the conditions are pleasant that month.
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Average weather in Niagara on the Lake
In May Niagara on the Lake generally has moderate temperatures with maximum daytime temperatures around 15°C, minimum nighttime temperatures around 6°C and moderate monthly rainfall. So on average the conditions are tolerable that month.
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Is your destination not in the list? Have a look at other destinations in Ontario, in Canada.
Is May the best time to visit Ontario?
In our opinion, May is a good time to visit Ontario with overall tolerable weather in Toronto. However, the weather conditions may vary depending on your destination.
Generally speaking, the best visiting conditions can be found in June, July, August and September offering mostly perfect weather in Toronto. In contrast, January, February, March, April, November and December tend to have poor weather conditions.
Interested in more climate information?
We have much more information about the climate in Ontario.
Interested in the weather conditions in a specific month? Select the month below.
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 climate conditions. Find out where to go with our weather planner.