Weather in September in Ontario
Are you planning a trip a to Ontario in September and wondering what kind of weather to expect? This page has all the details you need.
What is the weather like in Ontario in September?
Ontario is a region in Canada. September in Ontario generally has temperatures that range from mild to warm, with precipitation levels ranging from moderate to high. During September, summer is in full swing.
Temperatures
During the day temperatures vary from mild in Niagara on the Lake at 17°C to warm in Chatham at 24°C. At night it cools down to 14°C in Chatham and 9°C in Niagara on the Lake.
Precipitation
In September, precipitation varies across different areas. From moderate rainfall in Niagara on the Lake with an average of 60 mm to high rainfall in Schreiber with 127 mm.Average sunshine
The days are mostly sunny, with an average total of around 195 hours of sunshine in Toronto. The sunlight during this month doesn't just make the days brighter, it also seems to make everyone a bit more cheerful.To learn more about the conditions in specific areas of Ontario in September, check out the map below. For more details on the yearly weather, visit our Ontario climate page.
Where to go in Ontario in September
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Popular destinations
What is the weather like in September for the 5 most popular destinations in Ontario?
Toronto
In September Toronto generally has high temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 15°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Ottawa
In September Ottawa generally has high temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 10°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Niagara Falls
In September Niagara Falls generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Mississauga
In September Mississauga generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are perfect that month.
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Niagara on the Lake
In September Niagara on the Lake generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 9°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 September the best time to visit Ontario?
We consider September to be one of the best times to travel to Ontario. Typically, the climate in Toronto is perfect. 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. 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 travel conditions. Find out where to go with our weather planner.