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December Weather in Park Forest, United States

Last updated: June 24, 2025

In December, the average temperature in Park Forest, United States hovers around 1°C (34°F), with a minimum that can plunge to -21°C (-5°F) and a maximum reaching 19°C (66°F). Expect about 57 mm (2.2 in) of precipitation over 7 days, contributing to an average humidity of 84%. Stay prepared for varied weather conditions!

December Temperature in Park Forest

In December in Park Forest, the average temperature is 1°C (34°F). The maximum can reach 19°C (66°F), while the minimum can drop as low as -21°C (-5°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

December Weather in Park Forest: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Park Forest, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Park Forest, December typically has an average temperature of 1°C (34°F), with highs reaching up to 19°C (66°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec272840496172757368554034
Data source: Temperature data for Park Forest 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 Park Forest

In Park Forest in December, the precipitation amount is 57 mm (2.2 in) over the course of 7 days.

December Precipitation Trends in Park Forest

The chart displays monthly precipitation patterns in Park Forest, 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 Park Forest, December typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec66699612216314311492801396357
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Park Forest

In Park Forest in December humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.

December Average Humidity in Park Forest

This chart illustrates the average monthly humidity levels in Park Forest, 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 Park Forest is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Park Forest

In Park Forest 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 Park Forest, you can visit Hourly UV Index in Park Forest.

Maximum UV Index Levels in Park Forest for December

The chart shows the monthly maximum UV Index (UVI) for Park Forest 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 Park Forest typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Park Forest 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 Park Forest Compares to Other Months

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

This table compares monthly weather conditions in Park Forest, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)66 mm (2.6 inches)82%moderate
February Weather-2°C (29°F)69 mm (2.7 inches)83%moderate
March Weather4°C (40°F)96 mm (3.8 inches)84%high
April Weather9°C (49°F)122 mm (4.8 inches)85%very high
May Weather16°C (61°F)163 mm (6.4 inches)79%very high
June Weather22°C (72°F)143 mm (5.6 inches)82%very high
July Weather24°C (76°F)114 mm (4.5 inches)80%very high
August Weather23°C (73°F)92 mm (3.6 inches)81%very high
September Weather20°C (68°F)80 mm (3.1 inches)80%very high
October Weather13°C (55°F)139 mm (5.5 inches)82%high
November Weather4°C (40°F)63 mm (2.5 inches)88%moderate
December Weather1°C (34°F)57 mm (2.2 inches)84%low

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