Click on a day for an hourly weather forecast
The temperatures in Bonnyville in September are quite cold with temperatures between 6°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Bonnyville 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.
Please note that Bonnyville can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Bonnyville in September 2025.
If you’re planning to visit Bonnyville in the near future, we highly recommend that you review the 14 day weather forecast for Bonnyville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -10° / -18° | 2 | 12 | 18 | 24 mm | Awful | Bonnyville in January |
| February | -9° / -18° | 1 | 8 | 19 | 23 mm | Awful | Bonnyville in February |
| March | -3° / -10° | 5 | 6 | 21 | 32 mm | Awful | Bonnyville in March |
| April | 5° / -3° | 7 | 9 | 15 | 71 mm | Awful | Bonnyville in April |
| May | 15° / 4° | 6 | 23 | 2 | 80 mm | Ok | Bonnyville in May |
| June | 19° / 8° | 11 | 19 | 0 | 170 mm | Ok | Bonnyville in June |
| July | 22° / 11° | 8 | 23 | 0 | 121 mm | Ok | Bonnyville in July |
| August | 21° / 10° | 5 | 26 | 0 | 76 mm | Good | Bonnyville in August |
| September | 16° / 6° | 3 | 26 | 1 | 48 mm | Good | Bonnyville in September |
| October | 7° / 0° | 4 | 20 | 7 | 39 mm | Bad | Bonnyville in October |
| November | -3° / -9° | 3 | 12 | 15 | 20 mm | Awful | Bonnyville in November |
| December | -10° / -16° | 1 | 14 | 16 | 14 mm | Awful | Bonnyville in December |