Toronto
Canada
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Toronto, Canada

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Colorfully lit night city of Toronto, Canada, with a view of the Nathan Phillips Square, and a large Toronto sign
Colorfully lit night city of Toronto, Canada, with a view of the Nathan Phillips Square, and a large Toronto sign
September in Toronto acts as a transition into autumn and is characterized by a slight drop in temperature to the warm and pleasant range of 13°C (55.4°F) and 22°C (71.6°F). The sunshine hours per day drop to eight making most days mildly warm and most nights cool and tolerable.
The first few weeks may carry the summer weather, but gradually, the days turn colder as the fall takes root towards the end of the month. The rainfall days in September are reduced to eleven, and the rain gauge manages to collect 40.6mm (1.6") precipitation.
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  • The average high temperature in September: 21°C

The warmest month (with the highest average high temperature) is July (26.6°C).
The month with the lowest average high temperature is January (-0.7°C).

  • The average low temperature in September: 13.4°C

The month with the highest average low temperature is July (18°C).
The coldest month (with the lowest average low temperature) is January (-6.7°C).

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  • The average rainfall in September: 84.7mm

The wettest month (with the highest rainfall) is September (84.7mm).
The driest month (with the lowest rainfall) is January (29.1mm).

  • The average rainfall days in September: 11.1 days

The month with the highest number of rainy days is May (12.7 days).
The month with the lowest number of rainy days is February (4.8 days).

  • The average snowfall in September: 0mm

The month with the highest snowfall is January (372mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

  • The average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

  • The average sea temperature in September: 20.1°C

The best month for swimming (with the highest average sea temperature) is August (22.3°C).
The coldest month (with the lowest average sea temperature) is March (1.9°C).

  • The average daylight in September: 12h

Months with the longest days are May, June and July (Average daylight: 15h).
Months with shortest days are January and December (Average daylight: 9h).

  • The average sunshine in September: 6.5h

The month with most sunshine is July (Average sunshine: 9h).
The month with least sunshine is December (Average sunshine: 2.5h).

  • The average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).

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