January weather forecast
Sun Prairie, WI

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Weather in January

Considering a midwinter month in Sun Prairie, Wisconsin, the weather is typically cold. Overall, conditions appear frosty and grey dominated by an 89% relative humidity. Predominantly, January showcases the highest amount of snow for the year, amassing 5.04" (128mm) of snowfall. Wind chills further intensify the cold, making outdoor activities potentially challenging. Despite the frigidity and overcast weather, January births instances of serenity often seen in winter postcard scenes.

Temperature

January stands out as Sun Prairie's coldest month, with temperatures ranging between an average high of 23.4°F (-4.8°C) and a low of 10.9°F (-11.7°C).

Humidity

The most humid month in Sun Prairie is January, with an average relative humidity of 89%.

Rainfall

In Sun Prairie, in January, it is raining for 4.7 days, with typically 1.22" (31mm) of accumulated precipitation. In Sun Prairie, during the entire year, the rain falls for 138.5 days and collects up to 26.42" (671mm) of precipitation.

Snowfall

Months with snowfall in Sun Prairie, Wisconsin, are January through April, October through December. January is the month with the most snowfall in Sun Prairie. Snow falls for 14.2 days and accumulates 5.04" (128mm) of snow.

Daylight

In January, the average length of the day is 9h and 25min.
On the first day of the month, sunrise is at 7:28 am and sunset at 4:31 pm. On the last day of January, sunrise is at 7:13 am and sunset at 5:07 pm CST.

Sunshine

The month with the least sunshine is January, with an average of 3.3h of sunshine.

UV index

January, November 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 hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 1 during January translates into the following directions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
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Frequently asked questions

What time of the year is the coldest in Sun Prairie?

January stands out as Sun Prairie's coldest month, with an average high-temperature of 23.4°F (-4.8°C) and a low-temperature of 10.9°F (-11.7°C).

How cold is January in Sun Prairie?

The high-temperature in Sun Prairie, Wisconsin, during January is 23.4°F (-4.8°C) and the low-temperature is 10.9°F (-11.7°C).

What is the most humid month in Sun Prairie?

With an average relative humidity of 89%, January is the most humid month in Sun Prairie.

What is the average humidity in January in Sun Prairie?

In Sun Prairie, the average relative humidity in January is 89%.

How much does it rain in Sun Prairie in January?

In Sun Prairie, Wisconsin, in January, during 4.7 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.

When does it snow the most in Sun Prairie?

The month with the most snowfall is January, when snow falls for 14.2 days and typically aggregates up to 5.04" (128mm) of snow.

How much does it snow in Sun Prairie in January?

In January, in Sun Prairie, Wisconsin, it is snowing for 14.2 days. Throughout January, 5.04" (128mm) of snow is accumulated.

How many hours of daylight does Sun Prairie have in January?

In January, the average day length is 9h and 25min.

What time are sunrise and sunset in January in Sun Prairie?

In January, on the first day of the month, sunrise is at 7:28 am and sunset at 4:31 pm. On the last day of the month, in Sun Prairie, Wisconsin, sunrise is at 7:13 am and sunset at 5:07 pm CST.

What is the month with the least sunshine in Sun Prairie?

January has the least sunshine of the year in Sun Prairie, Wisconsin, with an average of 3.3h of sunshine.

How many hours of sunshine does Sun Prairie have in January?

The average sunshine duration in January is 3.3h.

What is the month with the lowest UV index in Sun Prairie?

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Sun Prairie, Wisconsin.

What is the UV index intensity in January in Sun Prairie?

In Sun Prairie, Wisconsin, the average daily maximum UV index in January is 1. A UV Index reading of 2, and below, represents a low health threat 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
Sun Prairie, WI

Average temperature in January - Sun Prairie, WI
  • Average high temperature in January: 23.4°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in January: 10.9°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).

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Average pressure in January
Sun Prairie, WI

Average pressure in January - Sun Prairie, WI
  • Average pressure in January: 30.11"Hg

The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in January
Sun Prairie, WI

Average wind speed in January - Sun Prairie, WI
  • Average wind speed in January: 9.7mph

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in January
Sun Prairie, WI

Average humidity in January - Sun Prairie, WI
  • Average humidity in January: 89%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in January
Sun Prairie, WI

Average rainfall in January - Sun Prairie, WI
  • Average rainfall in January: 1.22"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is February (1.1").

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Average rainfall days in January
Sun Prairie, WI

Average rainfall days in January - Sun Prairie, WI
  • Average rainfall days in January: 4.7 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.7 days).

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Average snowfall in January
Sun Prairie, WI

Average snowfall in January - Sun Prairie, WI
  • Average snowfall in January: 5.04"

The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Sun Prairie, WI

Average snowfall days in January - Sun Prairie, WI
  • Average snowfall days in January: 14.2 days

The month with the highest number of snowfall days is January (14.2 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
Sun Prairie, WI

Average daylight in January / Average sunshine in January - Sun Prairie, WI
  • Average daylight in January: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in January: 3h and 2min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in January
Sun Prairie, WI

Average sunshine days in January - Sun Prairie, WI
  • Average sunshine days in January: 14.5 days

The month with the most sunshine days is December (16.8 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index in January
Sun Prairie, WI

Average UV index in January - Sun Prairie, WI
  • Average UV index in January: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in January
Sun Prairie, WI

Average cloud cover in January - Sun Prairie, WI
  • Average cloud cover in January: 65

The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in January
Sun Prairie, WI

Average visibility in January - Sun Prairie, WI
  • Average visibility in January: 5mi

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

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Sun Prairie, Wisconsin, USA

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