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December Weather in Mandan, United States

Last updated: June 24, 2025

In Mandan, United States, the average temperature in December is a chilly -6°C (22°F). Temperatures can dip as low as -31°C (-24°F), while occasionally reaching a maximum of 16°C (61°F). Expect about 22 mm (0.9 in) of precipitation spread over 4 days, and prepare for an average humidity level of 84%, adding to the winter's crisp atmosphere.

December Temperature in Mandan

In December in Mandan, the average temperature is -6°C (22°F). Maximums can reach 16°C (61°F) and minimums can be as low as -31°C (-24°F). Travelers should prepare for a wide range of temperatures and dress in layers to ensure comfort during their visit.

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

The chart illustrates December temperature patterns in Mandan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mandan, December typically has an average temperature of -6°C (22°F), with highs reaching up to 16°C (61°F) and lows dropping to around -31°C (-24°F).
JanFebMarAprMayJunJulAugSepOctNovDec151330405569737061443122
Data source: Temperature data for Mandan 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 Mandan

In Mandan in December, the precipitation amount is 22 mm (0.9 in) over a duration of 4 days.

December Precipitation Trends in Mandan

The chart displays monthly precipitation patterns in Mandan, 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 Mandan, December typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec121626275264626056561622
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mandan

In Mandan in December humidity is 84%. With an average temperature of -6°C (22°F), this humidity feels like an unpleasant chill that seeps into your bones, making travel feel much more uncomfortable and harsh than the temperature alone suggests.

December Average Humidity in Mandan

This chart illustrates the average monthly humidity levels in Mandan, 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 Mandan is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%88%78%75%76%79%78%78%69%71%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Mandan

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

Maximum UV Index Levels in Mandan for December

The chart shows the monthly maximum UV Index (UVI) for Mandan 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 Mandan typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2459810997532
Data source: Mandan 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 Mandan Compares to Other Months

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

This table compares monthly weather conditions in Mandan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)12 mm (0.5 inches)84%low
February Weather-10°C (14°F)16 mm (0.6 inches)88%moderate
March Weather-1°C (30°F)26 mm (1.0 inches)78%moderate
April Weather4°C (40°F)27 mm (1.1 inches)75%very high
May Weather13°C (56°F)52 mm (2.0 inches)76%very high
June Weather20°C (69°F)63 mm (2.5 inches)79%very high
July Weather23°C (74°F)62 mm (2.4 inches)78%very high
August Weather21°C (70°F)60 mm (2.4 inches)78%very high
September Weather16°C (61°F)56 mm (2.2 inches)69%high
October Weather6°C (44°F)56 mm (2.2 inches)71%moderate
November Weather-1°C (31°F)16 mm (0.6 inches)82%moderate
December Weather-6°C (22°F)22 mm (0.9 inches)84%low

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