Ontario weather in August
Thinking about venturing to Ontario this August and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:
What is the weather like in Ontario in August?
Ontario is a region in Canada. August in Ontario generally has temperatures that range from pleasant to warm, with precipitation levels ranging from moderate to high. In August, it is summer.
Based on our climate data spanning from 1990-2020, the average maximum temperature is pleasant in Niagara on the Lake at 20°C to warm in Amherstburg at 27°C. Nighttime temperatures generally drop to 20°C in Amherstburg and 12°C in Niagara on the Lake.
In August, precipitation varies across different areas. From moderate rainfall in Niagara on the Lake with an average of 47 mm to high rainfall in Otter Lake with 113 mm. Looking at the climate data spanning the last 30 years, this month usually has the lowest rainfall in Toronto, marking it as the year's driest month. Meanwhile, Toronto enjoys close to 245 hours of sunlight. This means it's a great month if you prefer bright and sunny days.
To learn more about the conditions in specific areas of Ontario in August, check out the map below. For more details on the yearly weather, visit our Ontario climate page.
Where to go in Ontario in August
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Popular destinations in Ontario
What is the weather like in August for the 5 most popular destinations in Ontario?
Average weather in Toronto
In August Toronto generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 18°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Average weather in Ottawa
In August Ottawa generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 14°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Average weather in Niagara Falls
In August Niagara Falls generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 17°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Average weather in Mississauga
In August Mississauga generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 17°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Average weather in Niagara on the Lake
In August Niagara on the Lake generally has pleasant temperatures with maximum daytime temperatures around 20°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Is your destination not in the list? Have a look at other destinations in Ontario, in Canada.
Is August the best time to visit Ontario?
We believe that August is one of the best times to visit Ontario with overall perfect weather in Toronto.
On average, the best time to visit Ontario is in June, July, August and September with generally perfect weather in Toronto. The weather in January, February, March, April, November and December, on the other hand, tends to be poor.
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.