Squamish-Lillooet Regional District (Whistler)
September
Weather in Squamish-Lillooet Regional District for September 2025
Your guide to Squamish-Lillooet Regional District weather in September - trends and predictions
In general, the average temperature in Squamish-Lillooet Regional District at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.3 °C by the end of September.
The climate of Squamish-Lillooet Regional District in September is notably wet, with an average of 13 rainy days.
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17
Dry days
13
Rainy days
0
Snow days
17°/0°
Temperatures
8 km/h
Avg max wind
71 %
Avg humidity
Squamish-Lillooet Regional District in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  24° | 3  17° | 4 25° | 5 28° | 6 27° | 7 28° |
| 8 25° | 9  14° | 10 17° | 11 16° | 12  17° | 13 14° | 14 17° |
| 15 19° | 16  21° | 17 14° | 18 15° | 19 10° | 20 13° | 21 17° |
| 22 15° | 23 13° | 24 14° | 25  12° | 26 8° | 27 9° | 28 9° |
| 29  9° | 30 11° |
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Temperatures trend during September in Squamish-Lillooet Regional District
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 27° /5° | 0 mm | 7 | |
| 2 Sept. | Partly cloudy | 24° /5° | 0.4 mm | 6 | |
| 3 Sept. | Patchy rain possible | 17° /2° | 0.2 mm | 4 | |
| 4 Sept. | Sunny | 25° /2° | 0 mm | 7 | |
| 5 Sept. | Sunny | 28° /5° | 0 mm | 7 | |
| 6 Sept. | Sunny | 27° /6° | 0 mm | 7 | |
| 7 Sept. | Sunny | 28° /6° | 0 mm | 7 | |
| 8 Sept. | Sunny | 25° /5° | 0 mm | 7 | |
| 9 Sept. | Fog | 14° /0° | 0.6 mm | 3 | |
| 10 Sept. | Patchy rain possible | 17° /0° | 0.1 mm | 4 | |
| 11 Sept. | Patchy rain possible | 16° /0° | 0.3 mm | 4 | |
| 12 Sept. | Light rain | 17° /0° | 0.9 mm | 5 | |
| 13 Sept. | Mist | 14° /-1° | 3.6 mm | 4 | |
| 14 Sept. | Mist | 17° /-1° | 3.2 mm | 4 | |
| 15 Sept. | Partly cloudy | 19° /-1° | 0.3 mm | 5 | |
| 16 Sept. | Cloudy | 21° /-1° | 0 mm | 6 | |
| 17 Sept. | Mist | 14° /1° | 3.5 mm | 4 | |
| 18 Sept. | Patchy rain possible | 15° /-1° | 1 mm | 4 | |
| 19 Sept. | Light rain | 10° /-1° | 1.5 mm | 3 | |
| 20 Sept. | Patchy rain possible | 13° /-2° | 0.3 mm | 3 | |
| 21 Sept. | Partly cloudy | 17° /-3° | 0 mm | 5 | |
| 22 Sept. | Sunny | 15° /3° | 7.6 mm | 5 | |
| 23 Sept. | Light rain shower | 13° /1° | 3.7 mm | 3 | |
| 24 Sept. | Patchy rain possible | 14° /-1° | 3.1 mm | 4 | |
| 25 Sept. | Moderate or heavy rain with thunder | 12° /-1° | 111.7 mm | 3 | |
| 26 Sept. | Moderate or heavy rain with thunder | 8° /-4° | 46.2 mm | 2 | |
| 27 Sept. | Light rain shower | 9° /-4° | 21.5 mm | 3 | |
| 28 Sept. | Moderate or heavy rain with thunder | 9° /-4° | 4.6 mm | 3 | |
| 29 Sept. | Thundery outbreaks possible | 9° /-5° | 0.1 mm | 3 | |
| 30 Sept. | Partly cloudy | 11° /-6° | 0 mm | 3 | |
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Important Notice
Our weather forecast for Squamish-Lillooet Regional District in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Squamish-Lillooet Regional District forecast closer to your planned date for the most up-to-date weather information.
Squamish-Lillooet Regional District in September - FAQ
What are the expected maximum and minimum temperatures in Squamish-Lillooet Regional District during September?
During September, expect a variety of temperatures with highs around 17° and lows near 0°, suitable for diverse activities and preferences.
How much rainfall should be expected in Squamish-Lillooet Regional District during September?
Significant rainfall exceeding 183.7 mm is expected in Squamish-Lillooet Regional District during September, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Squamish-Lillooet Regional District during September?
The average wind speed in Squamish-Lillooet Regional District during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Squamish-Lillooet Regional District
Explore the daily rainfall trends and prepare for Squamish-Lillooet Regional Districts September weather 💧
UV exposure in Squamish-Lillooet Regional District during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Squamish-Lillooet Regional District?Get accurate weather forecasts for Squamish-Lillooet Regional District, located at latitude 50.118 and longitude -122.954. Stay updated with localized weather information tailored for Squamish-Lillooet Regional District.
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