September Weather in Cardston, Canada

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.

September Temperature in Cardston

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.

September Weather in Cardston: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Cardston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cardston, September typically has an average temperature of 12°C (55°F), with highs reaching up to 32°C (91°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec241730385159666454403325
Data source: Temperature data for Cardston generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Cardston

In Cardston in September, the total precipitation amount is 35 mm (1.4 in) spread over a period of 6 days.

September Precipitation Trends in Cardston

The chart displays monthly precipitation patterns in Cardston, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Cardston, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec143931537259223235453728
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cardston

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.

September Average Humidity in Cardston

This chart illustrates the average monthly humidity levels in Cardston, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Cardston is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%91%88%84%78%77%79%69%69%78%87%94%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cardston

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.

Maximum UV Index Levels in Cardston for September

The chart shows the monthly maximum UV Index (UVI) for Cardston in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Cardston typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689997532
Data source: Cardston September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Cardston Compares to Other Months

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.

This table compares monthly weather conditions in Cardston, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
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 Weather4°C (39°F)53 mm (2.1 inches)84%high
May Weather10°C (51°F)72 mm (2.9 inches)78%very high
June Weather15°C (59°F)59 mm (2.3 inches)77%very high
July Weather19°C (66°F)22 mm (0.9 inches)79%very high
August Weather18°C (65°F)32 mm (1.3 inches)69%very high
September Weather12°C (55°F)35 mm (1.4 inches)69%high
October Weather5°C (41°F)45 mm (1.8 inches)78%moderate
November Weather0°C (33°F)37 mm (1.5 inches)87%moderate
December Weather-4°C (25°F)28 mm (1.1 inches)94%low

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