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December Weather in Evanston, United States

Last updated: June 24, 2025

In December, the average temperature in _ Evanston, United States_ hovers around -5°C (23°F), with extremes reaching as low as -22°C (-8°F) and peaking at 12°C (54°F). Expect about 42 mm (1.7 in) of precipitation spread over 10 days, accompanied by an average humidity of 88%, making it a chilly yet captivating winter month.

December Temperature in Evanston

In December in Evanston, the average temperature is -5°C (23°F), with maximums reaching 12°C (54°F) and minimums dropping as low as -22°C (-8°F). Be sure to pack warm clothing to stay comfortable while exploring this chilly destination!

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

The chart illustrates December temperature patterns in Evanston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Evanston, December typically has an average temperature of -5°C (23°F), with highs reaching up to 12°C (54°F) and lows dropping to around -22°C (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec222331384861706758413222
Data source: Temperature data for Evanston 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 Evanston

In Evanston in December, the precipitation amount is 42 mm (1.7 in) over the course of 10 days.

December Precipitation Trends in Evanston

The chart displays monthly precipitation patterns in Evanston, 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 Evanston, December typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec435256506121232127354342
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Evanston

In Evanston in December humidity is 88%. With an average temperature of -5°C (23°F), this humidity feels like an icy blanket enveloping you, making travel uncomfortable as the cold damp air seeps through layers of clothing, chilling you to the bone.

December Average Humidity in Evanston

This chart illustrates the average monthly humidity levels in Evanston, 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 Evanston is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Evanston

In Evanston in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Evanston, you can check the information here.

Maximum UV Index Levels in Evanston for December

The chart shows the monthly maximum UV Index (UVI) for Evanston 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 Evanston typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112121110753
Data source: Evanston 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 Evanston Compares to Other Months

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

This table compares monthly weather conditions in Evanston, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)43 mm (1.7 inches)91%moderate
February Weather-5°C (24°F)52 mm (2.1 inches)92%high
March Weather0°C (32°F)55 mm (2.2 inches)84%very high
April Weather3°C (38°F)50 mm (2.0 inches)74%very high
May Weather9°C (48°F)61 mm (2.4 inches)62%extreme
June Weather16°C (61°F)21 mm (0.8 inches)56%extreme
July Weather21°C (70°F)23 mm (0.9 inches)44%extreme
August Weather19°C (67°F)21 mm (0.8 inches)37%extreme
September Weather14°C (58°F)27 mm (1.0 inches)46%very high
October Weather5°C (41°F)35 mm (1.4 inches)67%high
November Weather0°C (33°F)43 mm (1.7 inches)84%moderate
December Weather-5°C (23°F)42 mm (1.7 inches)88%moderate

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