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December Weather in Fort Knox, United States

Last updated: June 24, 2025

In December, the average temperature in Fort Knox, United States hovers around 5°C (42°F). Expect a chilly range, with minimums dipping to -13°C (10°F) and maximums peaking at 22°C (72°F). Rainfall is also likely, with 105 mm (4.1 in) spread over approximately 10 days, while the air remains quite damp, featuring an average humidity of 88%. Prepare accordingly for a month of varied weather!

December Temperature in Fort Knox

In December in Fort Knox, the average temperature is 5°C (42°F). Maximums can reach 22°C (72°F), and minimums can be as low as -13°C (10°F). Pack accordingly if you plan to explore Fort Knox during this time, as temperatures can vary widely.

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

The chart illustrates December temperature patterns in Fort Knox, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Knox, December typically has an average temperature of 5°C (42°F), with highs reaching up to 22°C (72°F) and lows dropping to around -13°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec364048566875797672614541
Data source: Temperature data for Fort Knox 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 Knox

In Fort Knox in December, the precipitation amount is 105 mm (4.1 in) over the course of 10 days.

December Precipitation Trends in Fort Knox

The chart displays monthly precipitation patterns in Fort Knox, 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 Knox, December typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec901351291371381501099611710087105
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Fort Knox

In Fort Knox in December humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.

December Average Humidity in Fort Knox

This chart illustrates the average monthly humidity levels in Fort Knox, 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 Knox is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Fort Knox

In Fort Knox in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Fort Knox, you can check the information here.

Maximum UV Index Levels in Fort Knox for December

The chart shows the monthly maximum UV Index (UVI) for Fort Knox 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 Knox typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101110109753
Data source: Fort Knox 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 Knox Compares to Other Months

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

This table compares monthly weather conditions in Fort Knox, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)90 mm (3.5 inches)87%moderate
February Weather4°C (40°F)135 mm (5.3 inches)86%moderate
March Weather9°C (49°F)129 mm (5.1 inches)86%high
April Weather13°C (56°F)137 mm (5.4 inches)82%very high
May Weather20°C (68°F)138 mm (5.4 inches)82%very high
June Weather24°C (75°F)150 mm (5.9 inches)83%extreme
July Weather26°C (79°F)109 mm (4.3 inches)80%very high
August Weather25°C (77°F)96 mm (3.8 inches)74%very high
September Weather22°C (72°F)117 mm (4.6 inches)71%very high
October Weather16°C (61°F)100 mm (3.9 inches)78%high
November Weather7°C (46°F)87 mm (3.4 inches)88%moderate
December Weather5°C (42°F)105 mm (4.1 inches)88%moderate

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