September weather forecast and climate
Toronto, Canada

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.

What is the temperature in September in Toronto?

In Toronto, in September, the average high-temperature is 21°C (69.8°F), and the average low-temperature is 13.4°C (56.1°F).

How many days does it rain in September in Toronto?

In Toronto, during September, the rain falls for 11.1 days and regularly aggregates up to 84.7mm (3.3") of precipitation.

What is the wettest month in Toronto?

September is the month with the most rainfall. Rain falls for 11.1 days and accumulates 84.7mm (3.3") of precipitation.

Does it snow in Toronto in September?

In Toronto, in September, it doesn't snow. In October, it regularly snows.

How cold is the water in September in Toronto?

In September, in Toronto, Canada, the average sea temperature is 20.1°C (68.2°F). Swimming in 20.1°C (68.2°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).
Average temperature in September - Toronto, Canada
  • 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).

  • 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).

Average rainfall in September - Toronto, Canada
  • 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).

Average rainfall days in September - Toronto, Canada
  • 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).

Average snowfall in September - Toronto, Canada
  • 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).

Average snowfall days in September - Toronto, Canada
  • 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).

Average sea temperature in September - Toronto, Canada
  • 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).

Average daylight in September / Average sunshine in September - Toronto, Canada
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • 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).

Average UV index in September - Toronto, Canada
  • 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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