Click on a day for an hourly weather forecast
The weather in Whistler in September is very cold with temperatures between 1°C and 16°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Whistler. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Whistler in September 2025.
If you’re planning to visit Whistler in the near future, we highly recommend that you review the 14 day weather forecast for Whistler before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -10° | 11 | 4 | 19 | 412 mm | Awful | Whistler in January |
| February | 0° / -12° | 9 | 2 | 19 | 249 mm | Awful | Whistler in February |
| March | 2° / -10° | 13 | 2 | 22 | 380 mm | Awful | Whistler in March |
| April | 5° / -7° | 14 | 4 | 15 | 247 mm | Awful | Whistler in April |
| May | 12° / -2° | 13 | 15 | 3 | 188 mm | Awful | Whistler in May |
| June | 15° / -1° | 11 | 19 | 0 | 183 mm | Ok | Whistler in June |
| July | 21° / 2° | 5 | 26 | 0 | 102 mm | Good | Whistler in July |
| August | 21° / 3° | 6 | 25 | 0 | 113 mm | Good | Whistler in August |
| September | 16° / 1° | 10 | 20 | 0 | 243 mm | Ok | Whistler in September |
| October | 9° / -2° | 12 | 15 | 3 | 333 mm | Awful | Whistler in October |
| November | 3° / -5° | 13 | 4 | 15 | 481 mm | Awful | Whistler in November |
| December | -1° / -10° | 9 | 4 | 21 | 343 mm | Awful | Whistler in December |