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, and on occasion, temperatures can even reach a frigid -40°F. 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 to a high of 28°F 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, 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" of snow is typically accumulated. The months with the lowest UV index in Madison are January, November and December, with an average maximum UV index of 1.
• Milwaukee - January »
  The month with the most snowfall in Milwaukee is January, when snow falls for 6.6 days and typically aggregates up to 1.1" of snow. In Milwaukee, during January, snow falls for 6.6 days and regularly aggregates up to 1.1" of snow.
• 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" of precipitation. Green Bay's temperature records reveal January as the coldest month, marked by average highs of 22.6°F and lows of 12.4°F.
• 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" of snow. In Kenosha during January, the rain falls for 6.7 days and regularly aggregates up to 1.42" of precipitation.
• Racine - January »
  The month with the most snowfall in Racine is January, when snow falls for 11.8 days and typically aggregates up to 1.02" of snow. The month with the most snowfall in Racine is January, when snow falls for 11.8 days and typically aggregates up to 1.02" of snow.
• Appleton - January »
  In Appleton in January, snow falls for 14.2 days, with typically accumulated 5.79" of snow. The months with the highest humidity in Appleton are January and February, with an average relative humidity of 88%.
• Waukesha - January »
  The month with the most snowfall in Waukesha is January, when snow falls for 11.2 days and typically aggregates up to 1.57" of snow. A typical winter month in Waukesha January observes a cold climate and regular snowfall.
• Eau Claire - January »
  The months with the lowest UV index in Eau Claire are January, February, November and December, with an average maximum UV index of 1. The months with the highest humidity in Eau Claire are January and February, with an average relative humidity of 91%.
• 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" of snow. The months with the lowest UV index in Oshkosh, Wisconsin, are January, February, November and December, with an average maximum UV index of 1.
• Janesville - January »
  The month with the most snowfall in Janesville is January, when snow falls for 12.5 days and typically aggregates up to 2.83" of snow. The months with the least rainfall in Janesville are January and February Rain falls for 3.5 days and accumulates 0.75" of rain.
• West Allis - January »
  The month with the most snowfall in West Allis is January, when snow falls for 11.6 days and typically aggregates up to 3.03" of snow. The month with the most snowfall in West Allis is January, when snow falls for 11.6 days and typically aggregates up to 3.03" of snow.
• La Crosse - January »
  The month with the least rainfall in La Crosse is January, when the rain falls for 3.4 days and typically collects 0.91" of precipitation. La Crosse's temperature records reveal January as the coldest month, marked by average highs of 21.6°F and lows of 8.2°F.