Weather in Toronto in September
September in Toronto is mild with average temperatures around 18.3°C (64.9°F). Moderate rainfall of 66mm spread over 13 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
21.2°C
70.2°F
Low
15.4°C
59.7°F
Precipitation
66 mm
2.6 inches
~13 rainy days
Conditions
Humidity
74%
Comparison to Adjacent Months
September is 3.3°C cooler than August.
September is 6.8°C warmer than October.