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The temperatures in Grande Prairie 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 Grande Prairie 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 Grande Prairie can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Grande Prairie in September 2025.
If you’re planning to visit Grande Prairie in the near future, we highly recommend that you review the 14 day weather forecast for Grande Prairie before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -7° / -13° | 4 | 7 | 19 | 59 mm | Awful | Grande Prairie in January |
| February | -6° / -14° | 4 | 5 | 19 | 47 mm | Awful | Grande Prairie in February |
| March | -2° / -9° | 6 | 5 | 21 | 63 mm | Awful | Grande Prairie in March |
| April | 6° / -2° | 7 | 10 | 13 | 72 mm | Awful | Grande Prairie in April |
| May | 16° / 4° | 6 | 22 | 3 | 86 mm | Ok | Grande Prairie in May |
| June | 20° / 8° | 9 | 21 | 0 | 135 mm | Ok | Grande Prairie in June |
| July | 23° / 10° | 9 | 22 | 0 | 141 mm | Good | Grande Prairie in July |
| August | 22° / 10° | 5 | 26 | 0 | 74 mm | Good | Grande Prairie in August |
| September | 16° / 6° | 5 | 24 | 1 | 65 mm | Good | Grande Prairie in September |
| October | 7° / 0° | 5 | 17 | 9 | 73 mm | Bad | Grande Prairie in October |
| November | -2° / -8° | 5 | 7 | 18 | 64 mm | Awful | Grande Prairie in November |
| December | -8° / -13° | 4 | 8 | 19 | 48 mm | Awful | Grande Prairie in December |