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December Weather in Ann Arbor, United States

Last updated: June 24, 2025

In December, the average temperature in Ann Arbor, United States hovers around 0°C (33°F). Expect chilly conditions, with minimum temperatures plunging to -25°C (-12°F) and highs reaching 17°C (63°F). This month also brings about 53 mm (2.1 in) of precipitation over 8 days, and an average humidity of 86% adds to the brisk atmosphere. Prepare for a mix of cold and wet weather!

December Temperature in Ann Arbor

In December in Ann Arbor, the average temperature is 0°C (33°F). Maximums can reach 17°C (63°F), while minimums can dip as low as -25°C (-12°F). Be prepared for a wide range of temperatures if you're traveling during this time!

December Weather in Ann Arbor: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Ann Arbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ann Arbor, December typically has an average temperature of 0°C (33°F), with highs reaching up to 17°C (63°F) and lows dropping to around -25°C (-12°F).
JanFebMarAprMayJunJulAugSepOctNovDec272837476070747266543932
Data source: Temperature data for Ann Arbor 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 Ann Arbor

In Ann Arbor in December, the total precipitation amount is 53 mm (2.1 in) over the course of 8 days.

December Precipitation Trends in Ann Arbor

The chart displays monthly precipitation patterns in Ann Arbor, 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 Ann Arbor, December typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec64677789121879772671027753
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ann Arbor

In Ann Arbor in December humidity is 86%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that permeates your clothes, making traveling uncomfortable and necessitating warm, layered clothing to stay dry and cozy.

December Average Humidity in Ann Arbor

This chart illustrates the average monthly humidity levels in Ann Arbor, 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 Ann Arbor is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Ann Arbor

In Ann Arbor 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 Ann Arbor, you can visit Hourly UV Index in Ann Arbor.

Maximum UV Index Levels in Ann Arbor for December

The chart shows the monthly maximum UV Index (UVI) for Ann Arbor 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 Ann Arbor typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101097542
Data source: Ann Arbor 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 Ann Arbor Compares to Other Months

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

This table compares monthly weather conditions in Ann Arbor, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)64 mm (2.5 inches)88%low
February Weather-2°C (28°F)67 mm (2.6 inches)87%moderate
March Weather3°C (37°F)77 mm (3.0 inches)85%moderate
April Weather8°C (47°F)89 mm (3.5 inches)86%very high
May Weather15°C (60°F)121 mm (4.8 inches)80%very high
June Weather21°C (70°F)87 mm (3.4 inches)80%very high
July Weather24°C (75°F)97 mm (3.8 inches)80%very high
August Weather22°C (72°F)71 mm (2.8 inches)80%very high
September Weather19°C (66°F)67 mm (2.6 inches)80%high
October Weather12°C (54°F)102 mm (4.0 inches)84%moderate
November Weather4°C (39°F)77 mm (3.0 inches)89%moderate
December Weather0°C (33°F)53 mm (2.1 inches)86%low

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