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December Weather in Carterville, United States

Last updated: June 24, 2025

In December, the average temperature in Carterville, United States hovers around 6°C (42°F). Expect a chilly minimum of -12°C (10°F) and a warm maximum of 24°C (75°F). With 46 mm (1.8 in) of precipitation spread over 6 days, it's wise to keep an umbrella handy. The average humidity remains quite high at 87%, adding to the overall dampness of the month.

December Temperature in Carterville

In December in Carterville, the average temperature is 6°C (42°F). Maximums can reach 24°C (75°F) and minimums can drop to as low as -12°C (10°F). Be prepared for a wide range of temperatures if you're planning to travel during this month.

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

The chart illustrates December temperature patterns in Carterville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Carterville, December typically has an average temperature of 6°C (42°F), with highs reaching up to 24°C (75°F) and lows dropping to around -12°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec363850576777807874604742
Data source: Temperature data for Carterville 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 Carterville

In Carterville in December, the precipitation amount is 46 mm (1.8 in) over a span of 6 days.

December Precipitation Trends in Carterville

The chart displays monthly precipitation patterns in Carterville, 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 Carterville, December typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec74641361311868794110801295446
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Carterville

In Carterville in December humidity is 87%. With an average temperature of 6°C (42°F), this humidity feels like a persistent chill that seeps into your bones, making it uncomfortable for traveling and leaving you longing for warmth at every turn.

December Average Humidity in Carterville

This chart illustrates the average monthly humidity levels in Carterville, 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 Carterville is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Carterville

In Carterville 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 Carterville, you can check the information here.

Maximum UV Index Levels in Carterville for December

The chart shows the monthly maximum UV Index (UVI) for Carterville 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 Carterville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Carterville 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 Carterville Compares to Other Months

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

This table compares monthly weather conditions in Carterville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)74 mm (2.9 inches)81%moderate
February Weather3°C (38°F)64 mm (2.5 inches)78%high
March Weather10°C (51°F)136 mm (5.4 inches)76%high
April Weather14°C (57°F)131 mm (5.2 inches)78%very high
May Weather20°C (68°F)186 mm (7.3 inches)83%very high
June Weather25°C (78°F)87 mm (3.4 inches)83%extreme
July Weather27°C (81°F)93 mm (3.7 inches)78%extreme
August Weather26°C (78°F)110 mm (4.3 inches)68%very high
September Weather23°C (74°F)80 mm (3.2 inches)64%very high
October Weather15°C (60°F)129 mm (5.1 inches)70%high
November Weather9°C (48°F)54 mm (2.1 inches)83%moderate
December Weather6°C (42°F)46 mm (1.8 inches)87%moderate

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