January weather forecastBrookfield, WI
January
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
Brookfield's January weather, marked by an average high temperature of 25.3°F (-3.7°C) and an average low temperature of 15.3°F (-9.3°C), is the coldest in the year.Humidity
The most humid month is January, with an average relative humidity of 86%.Rainfall
In Brookfield, during January, the rain falls for 4.8 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Brookfield, during the entire year, the rain falls for 129.9 days and collects up to 19.69" (500mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 12.3 days and typically aggregates up to 3.39" (86mm) of snow.Daylight
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
With an average of 3.5h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 1 in January suggests the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in January /
Average sunshine in January
Brookfield, WI
- Average daylight in January: 9h and 24min
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 30min
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).
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).
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).
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).
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).
