Last updated: June 18, 2025
In September, the average temperature in Williams Lake, Canada hovers around 11°C (53°F), with a diverse range where the minimum can drop to -2°C (28°F) and the maximum can soar to 28°C (83°F). Expect 68 mm (2.7 in) of precipitation spread over 11 days, contributing to an average humidity of 83%. Stay prepared for a mix of weather during this month!
In September in Williams Lake, the average temperature is 11°C (53°F). Maximums can reach 28°C (83°F), while minimums can drop to as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In Williams Lake in September, the total precipitation amount is 68 mm (2.7 in) spread over a duration of 11 days.
In Williams Lake in September, humidity is 83%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and causing an inevitable sheen of sweat to form, which can dampen the joy of exploring your surroundings.
In Williams Lake in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Williams Lake, you can refer to this Hourly UV Index in Williams Lake.
UV Risk Categories
Weather in Williams Lake varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Williams Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 30 mm (1.2 inches) | 94% | low |
| February Weather | -8°C (18°F) | 42 mm (1.7 inches) | 93% | moderate |
| March Weather | -1°C (31°F) | 31 mm (1.2 inches) | 90% | moderate |
| April Weather | 4°C (40°F) | 35 mm (1.4 inches) | 88% | moderate |
| May Weather | 11°C (53°F) | 39 mm (1.5 inches) | 84% | high |
| June Weather | 15°C (58°F) | 46 mm (1.8 inches) | 80% | very high |
| July Weather | 17°C (63°F) | 60 mm (2.4 inches) | 86% | very high |
| August Weather | 17°C (62°F) | 36 mm (1.4 inches) | 83% | very high |
| September Weather | 11°C (53°F) | 68 mm (2.7 inches) | 83% | high |
| October Weather | 4°C (39°F) | 73 mm (2.9 inches) | 90% | moderate |
| November Weather | 0°C (31°F) | 52 mm (2.1 inches) | 96% | low |
| December Weather | -6°C (21°F) | 41 mm (1.6 inches) | 97% | low |