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December Weather in Deer Lodge, United States

Last updated: June 24, 2025

In December, the average temperature in Deer Lodge, United States hovers around -7°C (20°F), providing a brisk atmosphere. Be prepared for minimum lows reaching -26°C (-15°F) and occasional highs of up to 15°C (60°F). With an average rainfall of 39 mm (1.5 in) spread over 8 days, don’t forget your umbrella! The air is also notably humid, with an average humidity of 95%.

December Temperature in Deer Lodge

In December in Deer Lodge, the average temperature is -7°C (20°F), with maximums reaching up to 15°C (60°F) and minimums plummeting as low as -26°C (-15°F). Travelers should prepare for a wide range of temperatures, from chilly days to surprisingly mild conditions, making it essential to pack layers for comfort.

December Weather in Deer Lodge: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Deer Lodge, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deer Lodge, December typically has an average temperature of -7°C (20°F), with highs reaching up to 15°C (60°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec191829354757666454392820
Data source: Temperature data for Deer Lodge 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 Deer Lodge

In Deer Lodge in December, the precipitation amount is 39 mm (1.5 in) over the course of 8 days.

December Precipitation Trends in Deer Lodge

The chart displays monthly precipitation patterns in Deer Lodge, 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 Deer Lodge, December typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec266241607387172134453839
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Deer Lodge

In Deer Lodge in December, humidity is 95%. With an average temperature of -7°C (20°F), this humidity feels like stepping into a freezer filled with damp air, making it uncomfortably chilling for traveling and causing your skin to feel clammy even in such frigid conditions.

December Average Humidity in Deer Lodge

This chart illustrates the average monthly humidity levels in Deer Lodge, 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 Deer Lodge is approximately 95%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%89%85%80%78%77%66%67%77%89%95%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Deer Lodge

In Deer Lodge 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 Deer Lodge, you can visit Hourly UV Index in Deer Lodge.

Maximum UV Index Levels in Deer Lodge for December

The chart shows the monthly maximum UV Index (UVI) for Deer Lodge 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 Deer Lodge typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689111098532
Data source: Deer Lodge 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 Deer Lodge Compares to Other Months

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

This table compares monthly weather conditions in Deer Lodge, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)26 mm (1.0 inches)93%moderate
February Weather-8°C (18°F)62 mm (2.5 inches)92%moderate
March Weather-2°C (29°F)41 mm (1.6 inches)89%high
April Weather2°C (35°F)60 mm (2.4 inches)85%very high
May Weather8°C (47°F)73 mm (2.9 inches)80%very high
June Weather14°C (57°F)87 mm (3.4 inches)78%extreme
July Weather19°C (66°F)17 mm (0.7 inches)77%very high
August Weather18°C (64°F)21 mm (0.8 inches)66%very high
September Weather12°C (54°F)34 mm (1.3 inches)67%very high
October Weather4°C (39°F)45 mm (1.8 inches)77%moderate
November Weather-2°C (29°F)38 mm (1.5 inches)89%moderate
December Weather-7°C (20°F)39 mm (1.5 inches)95%low

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