Whistler Weather in September
September in Whistler sees daytime temperatures around 15°C (59°F) and lows of 4°C (39°F) at night. With around 122 mm (4.8 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Whistler in September
Past climate data indicates that roughly 11 days will see rain, totalling around 122 mm (4.8 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Whistler in September
September in Whistler sees highs of 15°C (59°F) and lows of 4°C (39°F) overnight. September is a notable month of the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 4°C (39°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Whistler in September
Expect sunny days throughout the month, with an estimated 194 hours of sunshine. This makes it a pleasant time to visit Whistler.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Whistler.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Whistler's climate page.
Whistler Temperature in September
Min Temperature
4°C (39°F)
Max Temperature
15°C (59°F)
Chance of Rain
37%
Precipitation
122 mm (4.8 in)
Rainy days
11 days
Humidity
52%
Sunshine
194 hours
Percentage Sunshine
51%
Daily Historical Temperatures
44-year average (1982-2025)
Based on our historical records, temperatures in Whistler typically drop from around 21°C (70°F) at the start of September to approximately 17°C (63°F) by the end. Nights are cold, with lows typically ranging from 5°C (41°F) to 9°C (48°F).
Average temperatures in September
Daily Historical Precipitation
44-year average (1982-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Whistler in September
Browse day-by-day weather records for Whistler spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Whistler historical weather extremes in September
Based on 36 years of weather observations in Whistler between 1989 and 2025, these are the recorded extremes.
- The warmest day in September was on September 2, 2025, with a maximum of 34°C (93°F).
Best Places in Canada in September
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Whistler in September
The weather can be unpredictable in September, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Whistler in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Whistler's climate page.
Temperature Rainfall Sunshine Humidity
See the full Whistler climate overview or explore weather in Canada.
