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December Weather in Downers Grove, United States

Last updated: June 24, 2025

The average temperature in Downers Grove, United States during December hovers around 1°C (33°F). Expect a chill in the air, with minimum temperatures plunging to -21°C (-5°F), while highs can reach a pleasant 19°C (67°F). During this month, the area receives about 54 mm (2.1 in) of precipitation over 7 days, contributing to an average humidity of 84%. Stay prepared for a mix of conditions!

December Temperature in Downers Grove

In December in Downers Grove, the average temperature is 1°C (33°F). Maximum temperatures can reach up to 19°C (67°F), while minimum temperatures can drop as low as -21°C (-5°F). Be prepared for a wide range of temperatures during your travels.

December Weather in Downers Grove: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Downers Grove, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Downers Grove, December typically has an average temperature of 1°C (33°F), with highs reaching up to 19°C (67°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec262839486172757368543933
Data source: Temperature data for Downers Grove 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 Downers Grove

In Downers Grove in December, the precipitation amount is 54 mm (2.1 in) over a duration of 7 days.

December Precipitation Trends in Downers Grove

The chart displays monthly precipitation patterns in Downers Grove, 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 Downers Grove, December typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec61638912015615111691851315754
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Downers Grove

In Downers Grove in December humidity is 84%. With an average temperature of 1°C (33°F), this humidity feels like an icy blanket, making travel uncomfortable and breathless as the frigid air clings to your skin and dampens your clothes.

December Average Humidity in Downers Grove

This chart illustrates the average monthly humidity levels in Downers Grove, 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 Downers Grove 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 Downers Grove

In Downers Grove 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 Downers Grove, you can visit Hourly UV Index in Downers Grove.

Maximum UV Index Levels in Downers Grove for December

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

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

This table compares monthly weather conditions in Downers Grove, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)61 mm (2.4 inches)82%moderate
February Weather-2°C (28°F)63 mm (2.5 inches)83%moderate
March Weather4°C (40°F)89 mm (3.5 inches)84%high
April Weather9°C (49°F)120 mm (4.7 inches)85%very high
May Weather16°C (61°F)156 mm (6.1 inches)79%very high
June Weather22°C (72°F)151 mm (6.0 inches)82%very high
July Weather24°C (76°F)116 mm (4.6 inches)80%very high
August Weather23°C (73°F)91 mm (3.6 inches)81%very high
September Weather20°C (68°F)85 mm (3.4 inches)80%very high
October Weather12°C (55°F)131 mm (5.2 inches)82%high
November Weather4°C (39°F)57 mm (2.3 inches)88%moderate
December Weather1°C (33°F)54 mm (2.1 inches)84%low

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