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December Weather in Yorkville, United States

Last updated: June 24, 2025

In Yorkville, United States, the average temperature in December hovers around 2°C (37°F). Expect conditions to range from a brisk -16°C (3°F) at the lowest to a mild 18°C (65°F) at the peak. With 104 mm (4.1 in) of precipitation spread over 11 days, it's wise to prepare for some wet weather. The air remains quite humid, with an average humidity of 86%, adding to the season's chill.

December Temperature in Yorkville

In December in Yorkville, the average temperature is 2°C (37°F). Maximum temperatures can reach 18°C (65°F), while the minimum can drop as low as -16°C (3°F). It's advisable to pack layers if you're traveling during this month, as the weather can vary significantly.

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

The chart illustrates December temperature patterns in Yorkville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yorkville, December typically has an average temperature of 2°C (37°F), with highs reaching up to 18°C (65°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec313542526370757368574236
Data source: Temperature data for Yorkville 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 Yorkville

In Yorkville in December, the precipitation amount is 104 mm (4.1 in) over the course of 11 days.

December Precipitation Trends in Yorkville

The chart displays monthly precipitation patterns in Yorkville, 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 Yorkville, December typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec921171081351331441309911712192104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Yorkville

In Yorkville in December, humidity is 86%. With an average temperature of 2°C (37°F), this humidity feels like a chilly dampness that clings to your clothes and makes outdoor activities quite uncomfortable for traveling.

December Average Humidity in Yorkville

This chart illustrates the average monthly humidity levels in Yorkville, 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 Yorkville is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Yorkville

In Yorkville 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 Yorkville, you can visit Hourly UV Index in Yorkville.

Maximum UV Index Levels in Yorkville for December

The chart shows the monthly maximum UV Index (UVI) for Yorkville 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 Yorkville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Yorkville 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 Yorkville Compares to Other Months

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

This table compares monthly weather conditions in Yorkville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (31°F)92 mm (3.6 inches)88%moderate
February Weather2°C (35°F)117 mm (4.6 inches)88%moderate
March Weather6°C (42°F)108 mm (4.3 inches)87%high
April Weather11°C (52°F)135 mm (5.3 inches)87%very high
May Weather17°C (63°F)133 mm (5.2 inches)81%very high
June Weather21°C (70°F)144 mm (5.7 inches)83%very high
July Weather24°C (75°F)130 mm (5.1 inches)82%very high
August Weather23°C (73°F)99 mm (3.9 inches)76%very high
September Weather20°C (68°F)117 mm (4.6 inches)77%very high
October Weather14°C (58°F)121 mm (4.8 inches)82%high
November Weather6°C (42°F)92 mm (3.6 inches)89%moderate
December Weather2°C (37°F)104 mm (4.1 inches)86%low

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