Last updated: June 18, 2025
In September, the average temperature in Rocky Mountain House, Canada hovers around 10°C (49°F). However, be prepared for a temperature range that can drop to a chilly -8°C (18°F) or soar up to a warm 30°C (86°F). Expect around 71 mm (2.8 in) of precipitation over 11 days, contributing to an average humidity of 78%. Whether you're bundling up or enjoying mild days, make sure to pack accordingly!
In September in Rocky Mountain House, the average temperature is 10°C (49°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop as low as -8°C (18°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for their trip.
In Rocky Mountain House in September, the precipitation amount is 71 mm (2.8 in) distributed over 11 days.
In Rocky Mountain House in September humidity is 78%. With average temperature 10°C (49°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while exploring.
In Rocky Mountain House 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 Rocky Mountain House, you can refer to this Hourly UV Index in Rocky Mountain House.
UV Risk Categories
Weather in Rocky Mountain House varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rocky Mountain House, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 12 mm (0.5 inches) | 92% | low |
| February Weather | -11°C (13°F) | 26 mm (1.0 inches) | 93% | moderate |
| March Weather | -4°C (25°F) | 33 mm (1.3 inches) | 89% | moderate |
| April Weather | 2°C (35°F) | 47 mm (1.8 inches) | 85% | high |
| May Weather | 9°C (49°F) | 70 mm (2.8 inches) | 82% | high |
| June Weather | 14°C (57°F) | 108 mm (4.3 inches) | 82% | very high |
| July Weather | 16°C (60°F) | 112 mm (4.4 inches) | 84% | very high |
| August Weather | 15°C (59°F) | 72 mm (2.8 inches) | 82% | very high |
| September Weather | 10°C (49°F) | 71 mm (2.8 inches) | 78% | high |
| October Weather | 3°C (37°F) | 37 mm (1.4 inches) | 84% | moderate |
| November Weather | -3°C (28°F) | 37 mm (1.4 inches) | 89% | low |
| December Weather | -7°C (19°F) | 28 mm (1.1 inches) | 93% | low |