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December Weather in Knox, United States

Last updated: June 24, 2025

In Knox, United States, the average temperature in December hovers around 1°C (34°F). During this time, temperatures can dip as low as -22°C (-7°F) or rise to a maximum of 17°C (64°F). Expect some rain, with 61 mm (2.4 in) of precipitation spread over 8 days. Additionally, the air is quite moist, boasting an average humidity of 86%.

December Temperature in Knox

In December in Knox, the average temperature is 1°C (34°F). The maximum can reach 17°C (64°F), while the minimum can drop as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures and pack accordingly, ensuring they have both warm and moderate clothing options.

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

The chart illustrates December temperature patterns in Knox, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Knox, December typically has an average temperature of 1°C (34°F), with highs reaching up to 17°C (64°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec282940496273767368564034
Data source: Temperature data for 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 Knox

In Knox in December, the precipitation amount is 61 mm (2.4 in) distributed over 8 days.

December Precipitation Trends in Knox

The chart displays monthly precipitation patterns in 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 Knox, December typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7375101106163124116104721227661
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Knox

In Knox in December, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

December Average Humidity in Knox

This chart illustrates the average monthly humidity levels in 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 Knox is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Knox

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

Maximum UV Index Levels in Knox for December

The chart shows the monthly maximum UV Index (UVI) for 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 Knox typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098642
Data source: 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 Knox Compares to Other Months

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

This table compares monthly weather conditions in Knox, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)73 mm (2.9 inches)85%moderate
February Weather-1°C (30°F)75 mm (2.9 inches)85%moderate
March Weather5°C (40°F)101 mm (4.0 inches)86%high
April Weather10°C (50°F)106 mm (4.2 inches)87%very high
May Weather17°C (62°F)163 mm (6.4 inches)81%very high
June Weather23°C (73°F)124 mm (4.9 inches)82%very high
July Weather24°C (76°F)116 mm (4.6 inches)81%very high
August Weather23°C (73°F)104 mm (4.1 inches)79%very high
September Weather20°C (68°F)72 mm (2.8 inches)78%very high
October Weather13°C (56°F)122 mm (4.8 inches)81%high
November Weather5°C (41°F)76 mm (3.0 inches)89%moderate
December Weather1°C (34°F)61 mm (2.4 inches)86%low

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