May weather forecast
Wisconsin, USA

May serves as a robust introduction to the warm seasons in Wisconsin, as the state fully embraces spring. Northern regions experience temperatures ranging from 40°F (4.4°C) to 65°F (18.3°C), while in the southern areas, the mercury typically reads from 50°F (10°C) to 75°F (23.9°C). This significant warming trend compared to April often results in comfortable outdoor conditions.

Precipitation during May shifts primarily to rainfall, making it one of the wettest months of the year. Thunderstorms become increasingly frequent, particularly in the southern and eastern areas of the state. The rain contributes to a vibrant natural landscape, enriching Wisconsin's farmlands, forests, and river valleys. May rainfall also heighten the risk of flooding, particularly in low-lying areas near rivers and lakes.

In terms of daylight, May offers significantly longer hours, a transition that is welcomed by both outdoor enthusiasts and those engaged in agricultural activities. Unlike April, May in Wisconsin rarely experiences snow, even in the northern highlands and western uplands.

Cities near Lake Michigan, including Milwaukee and Green Bay, continue to feel the lake’s moderating influence. Here, temperatures are generally cooler compared to inland areas, particularly during the evenings. Although the lake effectively moderates extremes, it can also create conditions conducive to sudden, localized weather changes.

May serves as an important agricultural period for the state, as the increased temperatures and extended daylight offer optimal growing conditions. Despite being one of the wetter months, the overall climatic conditions make it a favorable time for outdoor activities and agricultural pursuits. Thus, May stands as a transition from the unpredictable weather of spring to the more stable, warmer conditions that define the Wisconsin summer.

---

• Madison - May »
  In Madison, during May, the rain falls for 6.6 days and regularly aggregates up to 0.59" (15mm) of precipitation. On the first day of May in Madison, sunrise is at 5:49 am and sunset at 7:59 pm.
• Milwaukee - May »
  On the last day of the month, in Milwaukee, sunrise is at 5:15 am and sunset at 8:23 pm CDT. In Milwaukee snow does not fall in May through September.
• Green Bay - May »
  In Green Bay during the entire year, snow falls for 63.7 days and aggregates up to 23.27" (591mm) of snow. May is the last month it regularly snows in Green Bay, Wisconsin.
• Kenosha - May »
  On the last day of the month, in Kenosha sunrise is at 5:16 am and sunset at 8:21 pm CDT. In Kenosha, during May, the rain falls for 18.1 days and regularly aggregates up to 3.27" (83mm) of precipitation.
• Racine - May »
  On the last day of the month, in Racine, Wisconsin, sunrise is at 5:15 am and sunset at 8:22 pm CDT. In Racine in May, it is raining for 13.7 days, with typically 1.34" (34mm) of accumulated precipitation.
• Appleton - May »
  The month with the most rainfall in Appleton is May, when the rain falls for 15.9 days and typically aggregates up to 3.54" (90mm) of precipitation. On the last day of the month, in Appleton, sunrise is at 5:12 am and sunset at 8:30 pm CDT.
• Waukesha - May »
  In Waukesha in May, during 13.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Waukesha, during the entire year, the rain falls for 114.5 days and collects up to 12.2" (310mm) of precipitation.
• Eau Claire - May »
  In Eau Claire during May, the rain falls for 16.8 days and regularly aggregates up to 3.46" (88mm) of precipitation. In Eau Claire during the entire year, the rain falls for 128.5 days and collects up to 26.22" (666mm) of precipitation.
• Oshkosh - May »
  On the last day of the month, in Oshkosh sunrise is at 5:14 am and sunset at 8:29 pm CDT. In Oshkosh, Wisconsin, in May, during 15.3 rainfall days, 3.62" (92mm) of precipitation is typically accumulated.
• Janesville - May »
  On the last day of the month, in Janesville, Wisconsin, sunrise is at 5:20 am and sunset at 8:27 pm CDT. In Janesville snow does not fall in May through September.
• West Allis - May »
  In West Allis during the entire year, the rain falls for 126 days and collects up to 19.37" (492mm) of precipitation. On the last day of May, in West Allis, Wisconsin, sunrise is at 5:15 am and sunset at 8:24 pm CDT.
• La Crosse - May »
  In La Crosse, Wisconsin, during May, the rain falls for 17 days and regularly aggregates up to 3.43" (87mm) of precipitation. In La Crosse, during the entire year, snow falls for 48.3 days and aggregates up to 20.2" (513mm) of snow.