Click on a day for an hourly weather forecast
The temperatures in Tadoussac in September are usually low and can range between 10°C and 17°C.
You can expect about 3 to 8 days of rain in Tadoussac 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 Tadoussac in September 2025.
If you’re planning to visit Tadoussac in the near future, we highly recommend that you review the 14 day weather forecast for Tadoussac before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -8° / -15° | 5 | 6 | 21 | 82 mm | Awful | Tadoussac in January |
| February | -7° / -14° | 5 | 4 | 20 | 80 mm | Awful | Tadoussac in February |
| March | -3° / -9° | 8 | 5 | 19 | 102 mm | Awful | Tadoussac in March |
| April | 4° / -2° | 10 | 8 | 12 | 140 mm | Awful | Tadoussac in April |
| May | 13° / 5° | 8 | 22 | 1 | 118 mm | Bad | Tadoussac in May |
| June | 18° / 10° | 8 | 22 | 0 | 118 mm | Ok | Tadoussac in June |
| July | 22° / 14° | 6 | 25 | 0 | 111 mm | Good | Tadoussac in July |
| August | 21° / 14° | 6 | 25 | 0 | 109 mm | Good | Tadoussac in August |
| September | 17° / 10° | 6 | 24 | 0 | 118 mm | Good | Tadoussac in September |
| October | 9° / 4° | 8 | 21 | 2 | 149 mm | Awful | Tadoussac in October |
| November | 3° / -1° | 6 | 14 | 10 | 99 mm | Awful | Tadoussac in November |
| December | -4° / -9° | 5 | 8 | 18 | 111 mm | Awful | Tadoussac in December |