Click on a day for an hourly weather forecast
The temperatures in Squamish in September are usually low and can range between 10°C and 16°C.
You can expect rain for roughly half of the month of September in Squamish. 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 Squamish in September 2025.
If you’re planning to visit Squamish in the near future, we highly recommend that you review the 14 day weather forecast for Squamish before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / 0° | 14 | 4 | 17 | 531 mm | Awful | Squamish in January |
| February | 4° / -1° | 11 | 2 | 18 | 349 mm | Awful | Squamish in February |
| March | 6° / 0° | 13 | 2 | 19 | 451 mm | Awful | Squamish in March |
| April | 9° / 3° | 13 | 6 | 12 | 283 mm | Awful | Squamish in April |
| May | 14° / 7° | 9 | 20 | 3 | 168 mm | Bad | Squamish in May |
| June | 16° / 9° | 7 | 23 | 0 | 137 mm | Ok | Squamish in June |
| July | 19° / 11° | 4 | 27 | 0 | 68 mm | Good | Squamish in July |
| August | 19° / 12° | 3 | 28 | 0 | 96 mm | Good | Squamish in August |
| September | 16° / 10° | 8 | 22 | 0 | 226 mm | Ok | Squamish in September |
| October | 12° / 6° | 12 | 17 | 2 | 393 mm | Awful | Squamish in October |
| November | 7° / 2° | 15 | 6 | 13 | 564 mm | Awful | Squamish in November |
| December | 4° / -1° | 13 | 3 | 19 | 470 mm | Awful | Squamish in December |