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December Weather in Cook, United States

Last updated: June 24, 2025

In December, the average temperature in Cook, United States hovers around -9°C (16°F). However, brace yourself for extremes: minimums can plummet to -38°C (-36°F), while maximums may reach a brisk 7°C (45°F). Expect 52 mm (2.0 in) of precipitation spread over 9 days, coupled with a high average humidity of 89%.

December Temperature in Cook

In December in Cook, the average temperature is -9°C (16°F), with maximums reaching 7°C (45°F) and minimums dipping as low as -38°C (-36°F). Travelers should be prepared for extremely cold weather conditions and pack accordingly to ensure a comfortable experience.

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

The chart illustrates December temperature patterns in Cook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cook, December typically has an average temperature of -9°C (16°F), with highs reaching up to 7°C (45°F) and lows dropping to around -38°C (-36°F).
JanFebMarAprMayJunJulAugSepOctNovDec9926375464696557422616
Data source: Temperature data for Cook 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 Cook

In Cook in December, the precipitation amount is 52 mm (2.0 in) over a span of 9 days.

December Precipitation Trends in Cook

The chart displays monthly precipitation patterns in Cook, 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 Cook, December typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec2328325963868873117913852
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cook

In Cook in December humidity is 89%. With an average temperature of -9°C (16°F), this humidity feels like an icy blanket, making it difficult to stay warm and comfortable while traveling, as the dampness seeps into your clothes and chills you to the bone.

December Average Humidity in Cook

This chart illustrates the average monthly humidity levels in Cook, 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 Cook is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%93%88%83%76%76%76%77%77%82%88%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cook

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

Maximum UV Index Levels in Cook for December

The chart shows the monthly maximum UV Index (UVI) for Cook 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 Cook typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987532
Data source: Cook 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 Cook Compares to Other Months

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

This table compares monthly weather conditions in Cook, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (9°F)23 mm (0.9 inches)92%low
February Weather-13°C (9°F)28 mm (1.1 inches)93%moderate
March Weather-3°C (26°F)32 mm (1.2 inches)88%moderate
April Weather3°C (38°F)59 mm (2.3 inches)83%high
May Weather12°C (54°F)63 mm (2.5 inches)76%very high
June Weather18°C (65°F)86 mm (3.4 inches)76%very high
July Weather21°C (69°F)88 mm (3.5 inches)76%very high
August Weather19°C (66°F)73 mm (2.9 inches)77%very high
September Weather14°C (57°F)117 mm (4.6 inches)77%high
October Weather6°C (43°F)90 mm (3.6 inches)82%moderate
November Weather-3°C (26°F)38 mm (1.5 inches)87%moderate
December Weather-9°C (16°F)52 mm (2.0 inches)89%low

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