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December Weather in Champaign, United States

Last updated: June 24, 2025

In December, the average temperature in Champaign, United States hovers around 2°C (36°F). Be prepared for a wide temperature range, as it can dip as low as -20°C (-4°F) and reach a maximum of 19°C (66°F). Expect about 56 mm (2.2 in) of precipitation spread over 8 days, with humidity levels averaging a high 87%.

December Temperature in Champaign

In December in Champaign, the average temperature is 2°C (36°F), with maximums reaching up to 19°C (66°F) and minimums plummeting as low as -20°C (-4°F). Be prepared for a wide range of weather conditions when traveling to Champaign during this month.

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

The chart illustrates December temperature patterns in Champaign, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Champaign, December typically has an average temperature of 2°C (36°F), with highs reaching up to 19°C (66°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec293243526574777470574136
Data source: Temperature data for Champaign 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 Champaign

In Champaign in December, the precipitation amount is 56 mm (2.2 in) over the course of 8 days.

December Precipitation Trends in Champaign

The chart displays monthly precipitation patterns in Champaign, 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 Champaign, December typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec787711412014210384102831167556
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Champaign

In Champaign in December, humidity is 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.

December Average Humidity in Champaign

This chart illustrates the average monthly humidity levels in Champaign, 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 Champaign is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Champaign

In Champaign 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 Champaign, you can check the information here.

Maximum UV Index Levels in Champaign for December

The chart shows the monthly maximum UV Index (UVI) for Champaign 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 Champaign typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Champaign 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 Champaign Compares to Other Months

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

This table compares monthly weather conditions in Champaign, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)78 mm (3.1 inches)84%moderate
February Weather0°C (32°F)77 mm (3.0 inches)82%moderate
March Weather6°C (43°F)114 mm (4.5 inches)84%high
April Weather11°C (53°F)120 mm (4.7 inches)83%very high
May Weather18°C (65°F)142 mm (5.6 inches)80%very high
June Weather24°C (75°F)103 mm (4.1 inches)83%extreme
July Weather25°C (78°F)84 mm (3.3 inches)82%very high
August Weather23°C (75°F)102 mm (4.0 inches)82%very high
September Weather21°C (70°F)83 mm (3.3 inches)79%very high
October Weather14°C (58°F)116 mm (4.5 inches)79%high
November Weather5°C (42°F)75 mm (2.9 inches)88%moderate
December Weather2°C (36°F)56 mm (2.2 inches)87%moderate

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