January weather forecast
Ann Arbor, MI

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The vast University of Michigan Law School Campus in Ann Arbor, Michigan
The vast University of Michigan Law School Campus in Ann Arbor, Michigan

Weather in January

The weather in Ann Arbor, Michigan, is characteristic of a typical Midwest winter, as the city enters the new year. January's temperatures often plummet, presenting chilly conditions during the month with frequent snowfalls. As the days remain short and with minimal sunshine hours, residents often experience cold, frosty mornings and evenings. Despite this, wind speeds tend to moderate during this time, providing a slight relief to people from chilly conditions. An interesting attribute is the relative humidity of 86%, which is tied for the high in the year alongside February, intervening to intensify the biting cold.

Temperature

January, with average temperatures reaching a high of 28.2°F (-2.1°C) and a low of 17.8°F (-7.9°C), is the coldest month.

Humidity

The months with the highest humidity in Ann Arbor are January and February, with an average relative humidity of 86%.

Rainfall

In Ann Arbor, in January, during 5.2 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, there are 144.9 rainfall days, and 18.82" (478mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Ann Arbor. In Ann Arbor, in January, during 11.5 snowfall days, 2.48" (63mm) of snow is typically accumulated. In Ann Arbor, during the entire year, snow falls for 45 days and aggregates up to 9.69" (246mm) of snow.

Daylight

In Ann Arbor, the average length of the day in January is 9h and 31min.
On the first day of the month, sunrise is at 8:03 am and sunset at 5:13 pm. On the last day of January, in Ann Arbor, sunrise is at 7:49 am and sunset at 5:47 pm EST.

Sunshine

With an average of 3h of sunshine, January has the least sunshine of the year in Ann Arbor, Michigan.

UV index

In Ann Arbor, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In January, a daily maximum UV index of 2 leads to the following instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Stay sun-safe with clothing that is both closely woven and worn loosely. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

What part of the year is the coldest in Ann Arbor?

The coldest temperatures in Ann Arbor, Michigan, occur during January, when averages reach a peak of 28.2°F (-2.1°C) and a low of 17.8°F (-7.9°C).

How cold is January in Ann Arbor?

The average high-temperature and low-temperature during January are 28.2°F (-2.1°C) and 17.8°F (-7.9°C) respectively.

What is the most humid month in Ann Arbor?

January and February, with an average relative humidity of 86%, are most humid months in Ann Arbor, Michigan.

What is the average humidity in January in Ann Arbor?

In Ann Arbor, the average relative humidity in January is 86%.

How many days does it rain in January in Ann Arbor?

In Ann Arbor, in January, it is raining for 5.2 days, with typically 0.91" (23mm) of accumulated precipitation.

How much does it snow in Ann Arbor in January?

In January, in Ann Arbor, Michigan, it is snowing for 11.5 days. Throughout January, 2.48" (63mm) of snow is accumulated.

What is the average length of the day in January in Ann Arbor?

In Ann Arbor, the average day length in January is 9h and 31min.

What time are sunrise and sunset in January in Ann Arbor?

In January, on the first day of the month, sunrise is at 8:03 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 5:47 pm EST.

What is the month with the least sunshine in Ann Arbor?

The month with the least sunshine in Ann Arbor, Michigan, is January, with an average of 3h of sunshine.

How long on average sun shines in January in Ann Arbor?

The average sunshine duration in January is 3h.

What is the UV index reading in January in Ann Arbor?

In January, the average daily maximum UV index in Ann Arbor is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Ann Arbor, MI

Average temperature in January - Ann Arbor, MI
  • Average high temperature in January: 28.2°F

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in January: 17.8°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

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Average pressure in January
Ann Arbor, MI

Average pressure in January - Ann Arbor, MI
  • Average pressure in January: 30.08"Hg

The months with the highest atmospheric pressure are March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in January
Ann Arbor, MI

Average wind speed in January - Ann Arbor, MI
  • Average wind speed in January: 10.1mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

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Average humidity in January
Ann Arbor, MI

Average humidity in January - Ann Arbor, MI
  • Average humidity in January: 86%

The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in January
Ann Arbor, MI

Average rainfall in January - Ann Arbor, MI
  • Average rainfall in January: 0.91"

The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is December (0.87").

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Average rainfall days in January
Ann Arbor, MI

Average rainfall days in January - Ann Arbor, MI
  • Average rainfall days in January: 5.2 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (5.2 days).

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Average snowfall in January
Ann Arbor, MI

Average snowfall in January - Ann Arbor, MI
  • Average snowfall in January: 2.48"

The month with the highest snowfall is February (2.72").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Ann Arbor, MI

Average snowfall days in January - Ann Arbor, MI
  • Average snowfall days in January: 11.5 days

The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Ann Arbor, MI

Average daylight in January / Average sunshine in January - Ann Arbor, MI
  • Average daylight in January: 9h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in January: 3h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days in January
Ann Arbor, MI

Average sunshine days in January - Ann Arbor, MI
  • Average sunshine days in January: 16 days

The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is July (10.3 days).

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Average UV index in January
Ann Arbor, MI

Average UV index in January - Ann Arbor, MI
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in January
Ann Arbor, MI

Average cloud cover in January - Ann Arbor, MI
  • Average cloud cover in January: 68

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in January
Ann Arbor, MI

Average visibility in January - Ann Arbor, MI
  • Average visibility in January: 5mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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Ann Arbor, Michigan, USA

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