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December Weather in Fort Pierre, United States

Last updated: June 24, 2025

In December, the average temperature in Fort Pierre, United States hovers around -3°C (27°F). Expect a chilly range, with minimums potentially plummeting to -27°C (-15°F) and maximums reaching a more temperate 20°C (68°F). The month brings about 26 mm (1.0 in) of precipitation spread over approximately 4 days, while the air maintains an average humidity of 76%. Bundle up and stay prepared for the brisk conditions!

December Temperature in Fort Pierre

In December, in Fort Pierre, the average temperature is -3°C (27°F). Maximums can reach 20°C (68°F), while minimums can drop as low as -27°C (-15°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

December Weather in Fort Pierre: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Fort Pierre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Pierre, December typically has an average temperature of -3°C (27°F), with highs reaching up to 20°C (68°F) and lows dropping to around -27°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec201934445973787466473627
Data source: Temperature data for Fort Pierre 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 Fort Pierre

In Fort Pierre in December, the precipitation amount is 26 mm (1.0 in) over the course of 4 days.

December Precipitation Trends in Fort Pierre

The chart displays monthly precipitation patterns in Fort Pierre, 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 Fort Pierre, December typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec151938497862865360541126
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Fort Pierre

In Fort Pierre in December, humidity is 76%. With an average temperature of -3°C (27°F), this humidity feels like a chilly dampness that seeps into your bones, making it essential to bundle up when traveling outdoors.

December Average Humidity in Fort Pierre

This chart illustrates the average monthly humidity levels in Fort Pierre, 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 Fort Pierre is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%81%72%73%75%82%83%82%73%71%78%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Fort Pierre

In Fort Pierre 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 Fort Pierre, you can visit Hourly UV Index in Fort Pierre.

Maximum UV Index Levels in Fort Pierre for December

The chart shows the monthly maximum UV Index (UVI) for Fort Pierre 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 Fort Pierre typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec25579101098532
Data source: Fort Pierre 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 Fort Pierre Compares to Other Months

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

This table compares monthly weather conditions in Fort Pierre, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)15 mm (0.6 inches)78%low
February Weather-7°C (19°F)19 mm (0.8 inches)81%moderate
March Weather1°C (34°F)38 mm (1.5 inches)71%moderate
April Weather7°C (44°F)49 mm (1.9 inches)73%high
May Weather15°C (59°F)78 mm (3.1 inches)75%very high
June Weather23°C (73°F)62 mm (2.4 inches)82%very high
July Weather25°C (78°F)86 mm (3.4 inches)83%very high
August Weather23°C (74°F)53 mm (2.1 inches)82%very high
September Weather19°C (66°F)60 mm (2.3 inches)73%very high
October Weather9°C (48°F)54 mm (2.1 inches)71%moderate
November Weather2°C (36°F)11 mm (0.4 inches)78%moderate
December Weather-3°C (27°F)26 mm (1.0 inches)76%low

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