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December Weather in Cardston, Canada

Last updated: June 18, 2025

In December, the average temperature in Cardston, Canada hovers around -4°C (25°F). However, temperatures can plummet to a chilling -35°C (-30°F) or rise to a maximum of 14°C (57°F). Expect about 28 mm (1.1 in) of precipitation spread over 7 days, while the air remains quite damp with an average humidity of 94%.

December Temperature in Cardston

In December in Cardston, the average temperature is -4°C (25°F), with maximums reaching 14°C (57°F) and minimums plummeting to -35°C (-30°F). Travelers should be prepared for a wide range of temperatures and dress in layers to ensure comfort during their visit.

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

The chart illustrates December 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, December typically has an average temperature of -4°C (25°F), with highs reaching up to 14°C (57°F) and lows dropping to around -35°C (-30°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.

December Precipitation in Cardston

In Cardston in December, the precipitation amount is 28 mm (1.1 in) over a period of 7 days.

December Precipitation Trends in Cardston

The chart displays monthly precipitation patterns in Cardston, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Cardston, December typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec143931537259223235453728
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cardston

In Cardston in December, humidity is 94%. With an average temperature of -4°C (25°F), this humidity feels like a bitter chill that seeps into your bones, making travel outside uncomfortable and necessitating extra layers to stay warm and dry.

December Average Humidity in Cardston

This chart illustrates the average monthly humidity levels in Cardston, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Cardston is approximately 94%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Cardston

In Cardston in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Cardston, you can visit Hourly UV Index in Cardston.

Maximum UV Index Levels in Cardston for December

The chart shows the monthly maximum UV Index (UVI) for Cardston in December, 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 December, the maximum UV index in Cardston typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689997532
Data source: Cardston December 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 December 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 December’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 December’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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