January weather forecast
Wausau, WI

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An aerial panorama of downtown Wausau City in Wisconsin
An aerial panorama of downtown Wausau City in Wisconsin

Weather in January

Expect the initial arrival of the year in Wausau, Wisconsin, with winters at their height characterized by chilled days and even colder nights. The days show a high temperature of merely 19.8°F (-6.8°C) and the nights dip low to 8.2°F (-13.2°C), combined with frequent snowfall averaging 2.17" (55mm) across 15.2 days in the month. Such harsh meteorological conditions are further marked by cloud cover that limits direct sunshine hours. It is advised to prepare well with heavy winter clothing and snow handling essentials for this month. January in Wausau presents a classic image of a winter wonderland with its white blankets of snow.

Temperature

Wausau notes the coldest temperatures in January, with a high average of 19.8°F (-6.8°C) and a low of 8.2°F (-13.2°C).

Humidity

The months with the highest humidity are January and February, with an average relative humidity of 91%.

Rainfall

The month with the least rainfall is January, when the rain falls for 3.2 days and typically collects 0.43" (11mm) of precipitation.

Snowfall

Months with snowfall in Wausau are January through May, October through December. January is the month with the most snowfall in Wausau. Snow falls for 15.2 days and accumulates 2.17" (55mm) of snow.

Daylight

In Wausau, the average length of the day in January is 9h and 15min.
On the first day of the month, sunrise is at 7:36 am and sunset at 4:27 pm. On the last day of January, sunrise is at 7:19 am and sunset at 5:04 pm CST.

Sunshine

With an average of 2.8h of sunshine, January has the least sunshine of the year.

UV index

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 1 during January morphs into the following directions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months in Wausau?

Wausau's January weather, marked by an average high temperature of 19.8°F (-6.8°C) and an average low temperature of 8.2°F (-13.2°C), is the coldest in the year.

How cold is January in Wausau?

The high-temperature, in January, in Wausau, is 19.8°F (-6.8°C), while the low-temperature averages to 8.2°F (-13.2°C).

What are the most humid months in Wausau?

January and February, with an average relative humidity of 91%, are most humid months in Wausau, Wisconsin.

What is the average humidity in January in Wausau?

In January, the average relative humidity in Wausau is 91%.

What is the driest month in Wausau?

The month with the least rainfall is January, when the rain falls for 3.2 days and typically collects 0.43" (11mm) of precipitation.

How many days does it rain in January in Wausau?

In Wausau, in January, it is raining for 3.2 days, with typically 0.43" (11mm) of accumulated precipitation.

When does it snow the most in Wausau?

The month with the most snowfall in Wausau is January, when snow falls for 15.2 days and typically aggregates up to 2.17" (55mm) of snow.

How much does it snow in Wausau in January?

In Wausau, Wisconsin, in January, snow falls for 15.2 days, with typically accumulated 2.17" (55mm) of snow.

How many hours of daylight does Wausau have in January?

In Wausau, the average day length in January is 9h and 15min.

When is the sunrise / sunset in January in Wausau?

On the first day of January in Wausau, Wisconsin, sunrise is at 7:36 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:04 pm CST.

What is the month with the least sunshine in Wausau?

The month with the least sunshine in Wausau, Wisconsin, is January, with an average of 2.8h of sunshine.

How many hours of sunshine does Wausau have in January?

The average sunshine duration in January is 2.8h.

What are the months with the lowest UV index in Wausau?

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Wausau, Wisconsin.

How high is the UV index in January in Wausau?

The average daily maximum UV index in January in Wausau, Wisconsin, is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
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
Wausau, WI

Average temperature in January - Wausau, WI
  • Average high temperature in January: 19.8°F

The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (19.8°F).

  • Average low temperature in January: 8.2°F

The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (8.2°F).

Average pressure in January
Wausau, WI

Average pressure in January - Wausau, WI
  • Average pressure in January: 30.09"Hg

The month with the highest atmospheric pressure is February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in January
Wausau, WI

Average wind speed in January - Wausau, WI
  • Average wind speed in January: 9.1mph

The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).

Average humidity in January
Wausau, WI

Average humidity in January - Wausau, WI
  • Average humidity in January: 91%

The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is April (76%).

Average rainfall in January
Wausau, WI

Average rainfall in January - Wausau, WI
  • Average rainfall in January: 0.43"

The wettest months (with the highest rainfall) are May and June (1.46").
The driest month (with the least rainfall) is January (0.43").

Average rainfall days in January
Wausau, WI

Average rainfall days in January - Wausau, WI
  • Average rainfall days in January: 3.2 days

The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is February (2.9 days).

Average snowfall in January
Wausau, WI

Average snowfall in January - Wausau, WI
  • Average snowfall in January: 2.17"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Wausau, WI

Average snowfall days in January - Wausau, WI
  • Average snowfall days in January: 15.2 days

The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January /
Average sunshine in January
Wausau, WI

Average daylight in January / Average sunshine in January - Wausau, WI
  • Average daylight in January: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in January: 2h and 5min

The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).

Average sunshine days in January
Wausau, WI

Average sunshine days in January - Wausau, WI
  • Average sunshine days in January: 17.9 days

The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is April (13.4 days).

Average UV index in January
Wausau, WI

Average UV index in January - Wausau, WI
  • Average UV index in January: 1

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

Average cloud cover in January
Wausau, WI

Average cloud cover in January - Wausau, WI
  • Average cloud cover in January: 72

The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 37).

Average visibility in January
Wausau, WI

Average visibility in January - Wausau, WI
  • Average visibility in January: 5mi

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

Wausau, Wisconsin, USA

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