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December Weather in Casselton, United States

Last updated: June 24, 2025

In December, the average temperature in Casselton, United States hovers around -7°C (19°F), with readings dipping as low as -31°C (-24°F) and peaking at a brisk 11°C (53°F). Expect 39 mm (1.5 in) of precipitation spread over 7 days, coupled with an average humidity level of 86%, making it a truly chilly and damp experience.

December Temperature in Casselton

In December in Casselton, the average temperature is -7°C (19°F). The maximum can reach 11°C (53°F), while the minimum can drop as low as -31°C (-24°F). Travelers should be prepared for cold weather and dress warmly when visiting this region.

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

The chart illustrates December temperature patterns in Casselton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casselton, December typically has an average temperature of -7°C (19°F), with highs reaching up to 11°C (53°F) and lows dropping to around -31°C (-24°F).
JanFebMarAprMayJunJulAugSepOctNovDec111028405770736861442919
Data source: Temperature data for Casselton 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 Casselton

In Casselton in December, the precipitation amount is 39 mm (1.5 in) over the course of 7 days.

December Precipitation Trends in Casselton

The chart displays monthly precipitation patterns in Casselton, 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 Casselton, December typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec172027475798748768821739
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Casselton

In Casselton in December, humidity is 86%. With an average temperature of -7°C (19°F), this humidity feels like a thick, chilly blanket enveloping you, making outdoor activities uncomfortable and travel feel more laborious as the cold dampness seeps into your bones.

December Average Humidity in Casselton

This chart illustrates the average monthly humidity levels in Casselton, 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 Casselton is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%92%85%81%75%79%77%78%77%79%86%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Casselton

In Casselton 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 Casselton, you can visit Hourly UV Index in Casselton.

Maximum UV Index Levels in Casselton for December

The chart shows the monthly maximum UV Index (UVI) for Casselton 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 Casselton typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810987532
Data source: Casselton 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 Casselton Compares to Other Months

Weather in Casselton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Casselton, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Casselton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-12°C (12°F)17 mm (0.7 inches)90%low
February Weather-12°C (11°F)20 mm (0.8 inches)92%moderate
March Weather-2°C (28°F)26 mm (1.0 inches)85%moderate
April Weather4°C (40°F)47 mm (1.9 inches)81%high
May Weather14°C (57°F)57 mm (2.2 inches)75%very high
June Weather21°C (70°F)98 mm (3.9 inches)79%very high
July Weather23°C (73°F)74 mm (2.9 inches)76%very high
August Weather20°C (69°F)87 mm (3.4 inches)78%very high
September Weather16°C (61°F)68 mm (2.7 inches)77%high
October Weather7°C (45°F)82 mm (3.2 inches)79%moderate
November Weather-2°C (29°F)17 mm (0.7 inches)86%moderate
December Weather-7°C (19°F)39 mm (1.5 inches)86%low

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