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December Weather in Miles City, United States

Last updated: June 24, 2025

In December, the average temperature in Miles City, United States hovers around -3°C (27°F). While you might experience a chilly minimum of -31°C (-23°F), the month can also surprise you with a maximum of 22°C (72°F). Expect a moderate precipitation total of 19 mm (0.7 in) spread over just 4 days. With an average humidity of 84%, be prepared for a damp and crisp atmosphere!

December Temperature in Miles City

In December in Miles City, the average temperature is -3°C (27°F), with maximums reaching 22°C (72°F) and minimums dropping as low as -31°C (-23°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their visit.

December Weather in Miles City: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Miles City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Miles City, December typically has an average temperature of -3°C (27°F), with highs reaching up to 22°C (72°F) and lows dropping to around -31°C (-23°F).
JanFebMarAprMayJunJulAugSepOctNovDec221734435669777362453527
Data source: Temperature data for Miles City 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 Miles City

In Miles City in December, the precipitation amount is 19 mm (0.7 in) over the course of 4 days.

December Precipitation Trends in Miles City

The chart displays monthly precipitation patterns in Miles City, 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 Miles City, December typically receives around 19 mm (0.7 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec122620404945292451351819
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Miles City

In Miles City in December humidity is 84%. With an average temperature of -3°C (27°F), this humidity feels like a heavy blanket that wraps around you, making travel uncomfortable and your breath visible in the cold air.

December Average Humidity in Miles City

This chart illustrates the average monthly humidity levels in Miles City, 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 Miles City is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%76%70%76%78%78%73%67%68%77%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Miles City

In Miles City 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 Miles City, you can visit Hourly UV Index in Miles City.

Maximum UV Index Levels in Miles City for December

The chart shows the monthly maximum UV Index (UVI) for Miles City 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 Miles City typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101098532
Data source: Miles City 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 Miles City Compares to Other Months

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

This table compares monthly weather conditions in Miles City, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)11 mm (0.5 inches)80%low
February Weather-8°C (18°F)26 mm (1.0 inches)83%moderate
March Weather1°C (34°F)20 mm (0.8 inches)75%moderate
April Weather6°C (44°F)40 mm (1.6 inches)70%very high
May Weather13°C (57°F)48 mm (1.9 inches)76%very high
June Weather21°C (69°F)45 mm (1.8 inches)78%very high
July Weather25°C (77°F)29 mm (1.1 inches)78%very high
August Weather23°C (73°F)24 mm (0.9 inches)73%very high
September Weather17°C (63°F)51 mm (2.0 inches)67%very high
October Weather7°C (46°F)35 mm (1.4 inches)68%moderate
November Weather2°C (35°F)18 mm (0.7 inches)77%moderate
December Weather-3°C (27°F)19 mm (0.7 inches)84%low

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