Climate ▸Forecast ▸September ▸October ▸
JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

Ontario Weather in September

September is one of the perfect months to visit Ontario, with daytime temperatures of 28°C (82°F) and lows of 9°C (48°F) at night. Rainfall is minimal, averaging just 12 mm (0.5 in) for the month.

Rainfall in Ontario in September

Historically, September sees about 4 days of rain, with a monthly average of 12 mm (0.5 in). The odd shower may pass through, but it usually doesn't amount to much. A largely dry month overall.

Temperature in Ontario in September

The temperature in Ontario in September is perfect. Daytime highs reach 28°C (82°F), with nights dropping to 9°C (48°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Ontario.

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.

Ontario Temperature in September

Min TemperatureMin Temperature 9°C (48°F)  
Max TemperatureMax Temperature 28°C (82°F)  
Chance of RainChance of Rain 13%  
PrecipitationPrecipitation 12 mm (0.5 in)  
Rainy daysRainy days 4 days  

Best Places in the United States of America in September

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 September →

Map not visible? Whoops sorry! Please refresh the page.
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 September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home.

What To Do in Ontario in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling
8/10
Walking
8/10
Camping
5/10
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