Click on a day for an hourly weather forecast
The temperatures in Red Deer in September are quite cold with temperatures between 6°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Red Deer 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 Red Deer can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Red Deer in September 2025.
If you’re planning to visit Red Deer in the near future, we highly recommend that you review the 14 day weather forecast for Red Deer before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -13° | 3 | 12 | 16 | 29 mm | Awful | Red Deer in January |
| February | -6° / -14° | 3 | 7 | 18 | 23 mm | Awful | Red Deer in February |
| March | -1° / -8° | 5 | 8 | 19 | 36 mm | Awful | Red Deer in March |
| April | 7° / -1° | 5 | 12 | 13 | 68 mm | Bad | Red Deer in April |
| May | 15° / 5° | 8 | 21 | 2 | 118 mm | Bad | Red Deer in May |
| June | 19° / 8° | 12 | 18 | 0 | 158 mm | Ok | Red Deer in June |
| July | 22° / 10° | 12 | 19 | 0 | 143 mm | Ok | Red Deer in July |
| August | 22° / 10° | 6 | 25 | 0 | 80 mm | Good | Red Deer in August |
| September | 17° / 6° | 5 | 23 | 2 | 52 mm | Ok | Red Deer in September |
| October | 9° / 0° | 3 | 21 | 7 | 37 mm | Bad | Red Deer in October |
| November | 0° / -7° | 3 | 13 | 14 | 35 mm | Awful | Red Deer in November |
| December | -7° / -13° | 3 | 11 | 17 | 27 mm | Awful | Red Deer in December |