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December Weather in Chinook, United States

Last updated: June 24, 2025

In Chinook, United States, the average temperature in December hovers around -4°C (26°F), with extremes ranging from a chilling -30°C (-22°F) to a mild 18°C (65°F). During this month, expect 22 mm (0.9 in) of precipitation spread over 6 days, accompanied by a high average humidity of 89%.

December Temperature in Chinook

In December in Chinook, the average temperature is -4°C (26°F), with maximums reaching up to 18°C (65°F) and minimums dipping as low as -30°C (-22°F). This range of temperatures suggests that travelers should be prepared for chilly conditions while enjoying the occasional warmer day.

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

The chart illustrates December temperature patterns in Chinook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chinook, December typically has an average temperature of -4°C (26°F), with highs reaching up to 18°C (65°F) and lows dropping to around -30°C (-22°F).
JanFebMarAprMayJunJulAugSepOctNovDec231631415464716858433325
Data source: Temperature data for Chinook 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 Chinook

In Chinook in December, the precipitation amount is 22 mm (0.9 in) over a span of 6 days.

December Precipitation Trends in Chinook

The chart displays monthly precipitation patterns in Chinook, 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 Chinook, December typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec133123324252162945293422
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chinook

In Chinook in December, humidity is 89%. With an average temperature of -4°C (26°F), this humidity feels like a biting chill that clings to your skin, making every step outdoors feel like traversing through a frosty fog.

December Average Humidity in Chinook

This chart illustrates the average monthly humidity levels in Chinook, 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 Chinook is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%90%82%73%74%72%74%71%65%68%81%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chinook

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

Maximum UV Index Levels in Chinook for December

The chart shows the monthly maximum UV Index (UVI) for Chinook 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 Chinook typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789997532
Data source: Chinook 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 Chinook Compares to Other Months

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

This table compares monthly weather conditions in Chinook, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)13 mm (0.5 inches)85%low
February Weather-9°C (16°F)31 mm (1.2 inches)90%moderate
March Weather0°C (31°F)23 mm (0.9 inches)82%moderate
April Weather5°C (41°F)32 mm (1.3 inches)73%high
May Weather12°C (54°F)42 mm (1.7 inches)73%very high
June Weather18°C (64°F)52 mm (2.1 inches)72%very high
July Weather22°C (71°F)16 mm (0.6 inches)74%very high
August Weather20°C (69°F)29 mm (1.2 inches)71%very high
September Weather14°C (58°F)45 mm (1.8 inches)65%high
October Weather6°C (43°F)29 mm (1.1 inches)68%moderate
November Weather1°C (33°F)34 mm (1.3 inches)81%moderate
December Weather-4°C (26°F)22 mm (0.9 inches)89%low

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