January weather forecast
Wisconsin, USA

January stands out as the coldest month in Wisconsin, with temperatures often plummeting to extreme lows. In the northern counties, it is not unusual for the mercury to drop to -30°F (-34.4°C), and on occasion, temperatures can even reach a frigid -40°F (-40°C). In contrast, southern regions experience milder but still notably cold conditions. The temperature range for this month usually varies from a low of -10°F (-23.3°C) to a high of 28°F (-2.2°C) in the southern parts of the state.

Compared to December and February, January typically presents the harshest climatic conditions, characterized by the shortest days and limited sunshine. Snowfall is a defining feature, especially in the northern highlands and western uplands, where it adds significantly to the already considerable winter accumulations. The city of Couderay holds the record for the lowest temperature ever recorded in the state, at -55°F (-48.3°C), which occurred on February 2, 1996.

The prevalence of fog is higher in January, often seen in the early mornings across various regions. The duration of snow cover is also at its peak during this month, particularly near Lake Superior where it can last for nearly 140 days throughout the year. In contrast, the south sees shorter durations of snow cover, lasting around 65 days annually.

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• Madison - January »
  In Madison in January, during 5.6 snowfall days, 0.87" (22mm) of snow is typically accumulated. January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Madison, Wisconsin.
• Milwaukee - January »
  In Milwaukee, Wisconsin, during January, snow falls for 6.6 days and regularly aggregates up to 1.1" (28mm) of snow. January is the most humid month in Milwaukee with an average relative humidity of 85%.
• Green Bay - January »
  The month with the least rainfall in Green Bay is January, when the rain falls for 4.6 days and typically collects 1.18" (30mm) of precipitation. In Green Bay in January, it is raining for 4.6 days, with typically 1.18" (30mm) of accumulated precipitation.
• Kenosha - January »
  The month with the most snowfall in Kenosha is January, when snow falls for 12.8 days and typically aggregates up to 4.33" (110mm) of snow. In Kenosha, in January, snow falls for 12.8 days, with typically accumulated 4.33" (110mm) of snow.
• Racine - January »
  In Racine in January, snow falls for 11.8 days, with typically accumulated 1.02" (26mm) of snow. As the calendar flips into a new year, residents of Racine, Wisconsin are greeted with typical winter weather conditions during the month of January.
• Appleton - January »
  In Appleton in January, during 14.2 snowfall days, 5.79" (147mm) of snow is typically accumulated. A true winter wonderland describes January in Appleton with snowfall reaching up to 5.79" (147mm) during the month.
• Waukesha - January »
  January, with its average high-temperature of 25°F (-3.9°C) and an average low-temperature of 14°F (-10°C), holds the record as the coldest month in Waukesha, Wisconsin. In Waukesha, in January, snow falls for 11.2 days, with typically accumulated 1.57" (40mm) of snow.
• Eau Claire - January »
  January, with average temperatures reaching a high of 19.4°F (-7°C) and a low of 6.3°F (-14.3°C), is the coldest month in Eau Claire, Wisconsin. In Eau Claire, during January, the rain falls for 2.7 days and regularly aggregates up to 0.83" (21mm) of precipitation.
• Oshkosh - January »
  The month with the most snowfall in Oshkosh is January, when snow falls for 13.8 days and typically aggregates up to 4.76" (121mm) of snow. January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Oshkosh, Wisconsin.
• Janesville - January »
  The months with the least rainfall in Janesville are January and February Rain falls for 3.5 days and accumulates 0.75" (19mm) of rain. In January, in Janesville the rain falls for 3.5 days.
• West Allis - January »
  In West Allis in January, during 11.6 snowfall days, 3.03" (77mm) of snow is typically accumulated. The most humid month in West Allis, Wisconsin, is January, with an average relative humidity of 85%.
• La Crosse - January »
  The month with the least rainfall in La Crosse, Wisconsin, is January, when the rain falls for 3.4 days and typically collects 0.91" (23mm) of precipitation. In La Crosse, Wisconsin, during January, the rain falls for 3.4 days and regularly aggregates up to 0.91" (23mm) of precipitation.