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December Weather in Elgin, United States

Last updated: June 24, 2025

In December, the average temperature in Elgin, United States hovers around -5°C (24°F). However, it can plunge as low as -28°C (-19°F) and occasionally rise to a maximum of 18°C (64°F). During this time, expect about 20 mm (0.8 in) of precipitation over the course of 4 days, with an average humidity level of 84%.

December Temperature in Elgin

In December in Elgin, the average temperature is -5°C (24°F). Maximums can reach 18°C (64°F) while minimums can drop to -28°C (-19°F). Travelers should be prepared for a wide range of temperatures, from chilly days to surprisingly warm spells.

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 -5°C (24°F), with highs reaching up to 18°C (64°F) and lows dropping to around -28°C (-19°F).
JanFebMarAprMayJunJulAugSepOctNovDec181531405568737061433223
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 total precipitation amount is 20 mm (0.8 in) spread over a period of 4 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 20 mm (0.8 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec121625296757617048571620
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 84%. With an average temperature of -5°C (24°F), this humidity feels like an icy blanket wrapped around you, making the air feel even colder and more biting, which can be quite uncomfortable for traveling.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%88%78%75%76%79%78%78%69%71%82%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec25598101097532
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)12 mm (0.5 inches)84%low
February Weather-10°C (15°F)16 mm (0.6 inches)88%moderate
March Weather-1°C (31°F)24 mm (1.0 inches)78%moderate
April Weather5°C (41°F)28 mm (1.1 inches)75%very high
May Weather13°C (55°F)66 mm (2.6 inches)76%very high
June Weather20°C (69°F)57 mm (2.3 inches)79%very high
July Weather23°C (74°F)61 mm (2.4 inches)78%very high
August Weather21°C (70°F)70 mm (2.7 inches)78%very high
September Weather16°C (61°F)48 mm (1.9 inches)69%high
October Weather6°C (44°F)57 mm (2.3 inches)71%moderate
November Weather0°C (32°F)16 mm (0.6 inches)82%moderate
December Weather-5°C (24°F)20 mm (0.8 inches)84%low

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