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December Weather in Elgin, United States

Last updated: June 24, 2025

In December, the average temperature in Elgin, United States is a chilly -4°C (25°F). Expect minimum temperatures to plummet to -30°C (-21°F) and a surprising maximum of 18°C (65°F). The month sees about 45 mm (1.8 in) of precipitation, spread over 6 days, while the average humidity hovers around a brisk 85%.

December Temperature in Elgin

In December in Elgin, the average temperature is -4°C (25°F). The maximum can reach 18°C (65°F), while the minimum can drop as low as -30°C (-21°F). Travelers should be prepared for a wide range of temperatures and dress accordingly.

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

The chart illustrates December temperature patterns in Elgin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Elgin, December typically has an average temperature of -4°C (25°F), with highs reaching up to 18°C (65°F) and lows dropping to around -30°C (-21°F).
JanFebMarAprMayJunJulAugSepOctNovDec181834445970737064483425
Data source: Temperature data for Elgin 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 Elgin

In Elgin in December, the precipitation amount is 45 mm (1.8 in) over the course of 6 days.

December Precipitation Trends in Elgin

The chart displays monthly precipitation patterns in Elgin, 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 Elgin, December typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec35455793146135951271161094745
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Elgin

In Elgin in December, humidity is 85%. With an average temperature of -4°C (25°F), this humidity feels like a damp chill clinging to your skin, making travel outside uncomfortable and leaving you feeling cold and clammy despite the freezing temperatures.

December Average Humidity in Elgin

This chart illustrates the average monthly humidity levels in Elgin, 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 Elgin is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Elgin

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

Maximum UV Index Levels in Elgin for December

The chart shows the monthly maximum UV Index (UVI) for Elgin 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 Elgin typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3458910997532
Data source: Elgin 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 Elgin Compares to Other Months

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

This table compares monthly weather conditions in Elgin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)35 mm (1.4 inches)88%moderate
February Weather-8°C (19°F)45 mm (1.8 inches)89%moderate
March Weather1°C (34°F)57 mm (2.2 inches)86%moderate
April Weather7°C (44°F)93 mm (3.7 inches)85%very high
May Weather15°C (59°F)146 mm (5.7 inches)79%very high
June Weather21°C (71°F)135 mm (5.3 inches)80%very high
July Weather23°C (74°F)95 mm (3.7 inches)80%very high
August Weather21°C (70°F)127 mm (5.0 inches)78%very high
September Weather18°C (64°F)116 mm (4.6 inches)80%high
October Weather9°C (49°F)109 mm (4.3 inches)84%moderate
November Weather1°C (34°F)47 mm (1.9 inches)89%moderate
December Weather-4°C (25°F)45 mm (1.8 inches)85%low

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