January Weather in Ann Arbor, United States

Last updated: June 24, 2025

In January, the average temperature in Ann Arbor, United States drops to -3°C (27°F). Expect chilly extremes, with minimums plunging to a frigid -27°C (-16°F) and highs reaching a mild 15°C (59°F). This month brings approximately 64 mm (2.5 in) of precipitation over 8 days, complemented by an average humidity level of 88%—perfect for those cozy indoor days!

January Temperature in Ann Arbor

In January in Ann Arbor, the average temperature is -3°C (27°F). Maximum temperatures can reach 15°C (59°F), while minimums can drop as low as -27°C (-16°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable.

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

The chart illustrates January 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, January typically has an average temperature of -3°C (27°F), with highs reaching up to 15°C (59°F) and lows dropping to around -27°C (-16°F).

Data source: Temperature data for Ann Arbor generated using information from the Copernicus Climate Change Service.

January Precipitation in Ann Arbor

In Ann Arbor in January, the precipitation amount is 64 mm (2.5 in) over the course of 8 days.

January Precipitation Trends in Ann Arbor

The chart displays monthly precipitation patterns in Ann Arbor, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Ann Arbor, January typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Ann Arbor

In Ann Arbor in January humidity is 88%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making outdoor exploration less inviting as the dampness clings to your clothing and slows your movements.

January Average Humidity in Ann Arbor

This chart illustrates the average monthly humidity levels in Ann Arbor, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Ann Arbor is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Ann Arbor

In Ann Arbor in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Ann Arbor in January, 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 January, the maximum UV index in Ann Arbor typically reaches 2, which falls under the low exposure category.

Data source: Ann Arbor January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
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 Weather	3°C (37°F)	77 mm (3.0 inches)	85%	moderate
April Weather	8°C (47°F)	89 mm (3.5 inches)	86%	very high
May Weather	15°C (60°F)	121 mm (4.8 inches)	80%	very high
June Weather	21°C (70°F)	87 mm (3.4 inches)	80%	very high
July Weather	24°C (75°F)	97 mm (3.8 inches)	80%	very high
August Weather	22°C (72°F)	71 mm (2.8 inches)	80%	very high
September Weather	19°C (66°F)	67 mm (2.6 inches)	80%	high
October Weather	12°C (54°F)	102 mm (4.0 inches)	84%	moderate
November Weather	4°C (39°F)	77 mm (3.0 inches)	89%	moderate
December Weather	0°C (33°F)	53 mm (2.1 inches)	86%	low