nomadseason

December Weather in Knox, United States

Last updated: June 24, 2025

In December, the average temperature in Knox, United States hovers around 1°C (33°F). While you might experience minimums as low as -16°C (3°F), temperatures can also reach a pleasant maximum of 16°C (62°F). Be prepared for 104 mm (4.1 in) of precipitation over 13 days, contributing to a high average humidity of 88%.

December Temperature in Knox

In December in Knox, the average temperature is 1°C (33°F), with maximums reaching 16°C (62°F) and minimums dropping as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable.

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 (33°F), with highs reaching up to 16°C (62°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec273138485967727064543933
Data source: Temperature data for Knox generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 104 mm (4.1 in) over the course of 13 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 104 mm (4.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec101115108136152143150112126131103104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Knox

In Knox in December humidity is 88%. With an average temperature of 1°C (33°F), this humidity feels like a damp chill wrapping around you, making it difficult to stay warm while traveling, as each breath carries a heavy, cold moisture that clings to your skin.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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-3°C (28°F)101 mm (4.0 inches)89%moderate
February Weather-1°C (31°F)115 mm (4.5 inches)90%moderate
March Weather3°C (38°F)108 mm (4.2 inches)89%high
April Weather9°C (48°F)136 mm (5.3 inches)88%very high
May Weather15°C (60°F)152 mm (6.0 inches)80%very high
June Weather20°C (68°F)143 mm (5.6 inches)79%very high
July Weather22°C (72°F)150 mm (5.9 inches)74%very high
August Weather21°C (70°F)112 mm (4.4 inches)64%very high
September Weather18°C (65°F)126 mm (4.9 inches)67%very high
October Weather12°C (54°F)131 mm (5.2 inches)81%high
November Weather4°C (39°F)103 mm (4.1 inches)89%moderate
December Weather1°C (33°F)104 mm (4.1 inches)88%low

Compare Knox's Climate with Cities Worldwide