Last updated: June 18, 2025
In Cardston, Canada, the average temperature in September hovers around 12°C (55°F), offering a mild climate for residents and visitors alike. Expect fluctuations, as temperatures can dip to a chilly -4°C (26°F) or soar up to a warm 32°C (91°F). That said, prepare for occasional rain, with 35 mm (1.4 in) of precipitation over 6 days. The air often feels quite humid, with an average humidity level of 69%, making for a refreshing yet damp atmosphere.
In September in Cardston, the average temperature is 12°C (55°F). Maximum temperatures can reach 32°C (91°F), while minimums can drop as low as -4°C (26°F). It’s advisable to pack layers to stay comfortable during your travels.
In Cardston in September, the total precipitation amount is 35 mm (1.4 in) spread over a period of 6 days.
In Cardston in September, humidity is 69%. With an average temperature of 12°C (55°F), this humidity feels like a damp chill that can make outdoor activities feel less enjoyable, requiring travelers to dress in layers and stay occasionally sheltered from the moisture in the air.
In Cardston in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Cardston.
UV Risk Categories
Weather in Cardston varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cardston, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 14 mm (0.5 inches) | 93% | low |
| February Weather | -9°C (17°F) | 39 mm (1.5 inches) | 91% | moderate |
| March Weather | -1°C (31°F) | 31 mm (1.2 inches) | 88% | moderate |
| April Weather | 4°C (39°F) | 53 mm (2.1 inches) | 84% | high |
| May Weather | 10°C (51°F) | 72 mm (2.9 inches) | 78% | very high |
| June Weather | 15°C (59°F) | 59 mm (2.3 inches) | 77% | very high |
| July Weather | 19°C (66°F) | 22 mm (0.9 inches) | 79% | very high |
| August Weather | 18°C (65°F) | 32 mm (1.3 inches) | 69% | very high |
| September Weather | 12°C (55°F) | 35 mm (1.4 inches) | 69% | high |
| October Weather | 5°C (41°F) | 45 mm (1.8 inches) | 78% | moderate |
| November Weather | 0°C (33°F) | 37 mm (1.5 inches) | 87% | moderate |
| December Weather | -4°C (25°F) | 28 mm (1.1 inches) | 94% | low |