January weather forecast
Brookfield, WI

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Weather in January

The transition into the new year in Brookfield, Wisconsin, brings with it the cold grip of winter. Snowfall is quite frequent, with an average accumulation of 3.39" (86mm) across 12.3 days. Other hallmarks of the month include a typically overcast sky, noticeable winds, and a decrease in daylight hours. The chill in the air remains persistent as January reinforces its standing as one of the coldest months of the year. Despite the biting cold, the characteristic weather conditions set the perfect stage for winter activities and sports.

Temperature

January is the coldest month, with the temperature often reaching an average high of 25.3°F (-3.7°C) and an average low of 15.3°F (-9.3°C).

Humidity

With an average relative humidity of 86%, January is the most humid month.

Rainfall

In Brookfield, during January, the rain falls for 4.8 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, there are 129.9 rainfall days, and 19.69" (500mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. January is the month with the most snowfall in Brookfield. Snow falls for 12.3 days and accumulates 3.39" (86mm) of snow.

Daylight

In Brookfield, the average length of the day in January is 9h and 26min.
On the first day of January, sunrise is at 7:23 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:02 pm CST.

Sunshine

The month with the least sunshine in Brookfield, Wisconsin, is January, with an average of 3.5h of sunshine.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In January, a daily UV index of 1 turns into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the coldest time of year in Brookfield?

In Brookfield, the lowest temperatures are generally noted in January, averaging a high of 25.3°F (-3.7°C) and a low of 15.3°F (-9.3°C).

How cold is January in Brookfield?

The high-temperature in Brookfield, Wisconsin, during January is 25.3°F (-3.7°C) and the low-temperature is 15.3°F (-9.3°C).

What is the most humid month in Brookfield?

With an average relative humidity of 86%, January is the most humid month.

What is the average humidity in January in Brookfield?

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

How many days does it rain in January in Brookfield?

In January, the rain falls for 4.8 days. Throughout January, 0.91" (23mm) of precipitation is accumulated.

What is the snowiest month in Brookfield?

The month with the most snowfall in Brookfield, Wisconsin, is January, when snow falls for 12.3 days and typically aggregates up to 3.39" (86mm) of snow.

How many days does it snow in January in Brookfield?

In Brookfield, Wisconsin, during January, snow falls for 12.3 days and regularly aggregates up to 3.39" (86mm) of snow.

What is the average length of the day in January in Brookfield?

In Brookfield, Wisconsin, the average day length in January is 9h and 26min.

When is the sunrise / sunset in January in Brookfield?

In January, on the first day of the month, sunrise is at 7:23 am and sunset at 4:27 pm. On the last day of the month, in Brookfield, Wisconsin, sunrise is at 7:08 am and sunset at 5:02 pm CST.

What is the month with the least sunshine in Brookfield?

With an average of 3.5h of sunshine, January has the least sunshine of the year.

How long on average sun shines in January in Brookfield?

The average sunshine duration in January in Brookfield is 3.5h.

What is the month with the lowest UV index in Brookfield?

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

What is the UV index reading in January in Brookfield?

In January, the average daily maximum UV index in Brookfield 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
Brookfield, WI

Average temperature in January - Brookfield, WI
  • Average high temperature in January: 25.3°F

The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (25.3°F).

  • Average low temperature in January: 15.3°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

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Average pressure in January
Brookfield, WI

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

The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in January
Brookfield, WI

Average wind speed in January - Brookfield, WI
  • Average wind speed in January: 11mph

The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

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Average humidity in January
Brookfield, WI

Average humidity in January - Brookfield, WI
  • Average humidity in January: 86%

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

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Average rainfall in January
Brookfield, WI

Average rainfall in January - Brookfield, WI
  • Average rainfall in January: 0.91"

The wettest month (with the highest rainfall) is July (2.6").
The driest month (with the least rainfall) is December (0.75").

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Average rainfall days in January
Brookfield, WI

Average rainfall days in January - Brookfield, WI
  • Average rainfall days in January: 4.8 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall in January
Brookfield, WI

Average snowfall in January - Brookfield, WI
  • Average snowfall in January: 3.39"

The month with the highest snowfall is January (3.39").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Brookfield, WI

Average snowfall days in January - Brookfield, WI
  • Average snowfall days in January: 12.3 days

The month with the highest number of snowfall days is January (12.3 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
Brookfield, WI

Average daylight in January / Average sunshine in January - Brookfield, 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 6min).

  • Average sunshine in January: 3h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days in January
Brookfield, WI

Average sunshine days in January - Brookfield, WI
  • Average sunshine days in January: 15 days

The month with the most sunshine days is December (18.6 days).
The month with the least sunshine days is July (12.1 days).

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Average UV index in January
Brookfield, WI

Average UV index in January - Brookfield, 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 and December (UV index 1).

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Average cloud cover in January
Brookfield, WI

Average cloud cover in January - Brookfield, WI
  • Average cloud cover in January: 63

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in January
Brookfield, WI

Average visibility in January - Brookfield, WI
  • Average visibility in January: 6mi

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

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Brookfield, Wisconsin, USA

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