Click on a day for an hourly weather forecast
The temperatures in Toronto in September are comfortable with low of 15°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Toronto during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Toronto in September 2025.
If you’re planning to visit Toronto in the near future, we highly recommend that you review the 14 day weather forecast for Toronto before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -7° | 6 | 9 | 17 | 54 mm | Awful | Toronto in January |
| February | -2° / -7° | 5 | 8 | 15 | 46 mm | Awful | Toronto in February |
| March | 4° / -2° | 7 | 15 | 9 | 63 mm | Awful | Toronto in March |
| April | 9° / 3° | 8 | 18 | 4 | 82 mm | Awful | Toronto in April |
| May | 16° / 9° | 7 | 24 | 0 | 100 mm | Ok | Toronto in May |
| June | 21° / 14° | 7 | 23 | 0 | 120 mm | Ok | Toronto in June |
| July | 25° / 19° | 7 | 24 | 0 | 128 mm | Good | Toronto in July |
| August | 25° / 19° | 5 | 26 | 0 | 114 mm | Perfect | Toronto in August |
| September | 22° / 15° | 5 | 25 | 0 | 74 mm | Good | Toronto in September |
| October | 15° / 9° | 7 | 23 | 0 | 88 mm | Ok | Toronto in October |
| November | 8° / 3° | 5 | 19 | 5 | 50 mm | Bad | Toronto in November |
| December | 2° / -2° | 7 | 11 | 13 | 52 mm | Awful | Toronto in December |