September weather forecast
Wisconsin, USA

September in Wisconsin marks the beginning of autumn, a season heralded by milder temperatures and a kaleidoscope of changing foliage. In the northern part of the state, temperatures range from 45°F to 70°F, whereas the southern regions experience a milder spectrum from 55°F to 75°F. The month shows a clear transition from the warmth of August, introducing cooler air, particularly in the evenings.

Rainfall decreases from the summer months but remains adequate, contributing to the landscape's transformation. Thunderstorms become less frequent, and the possibility of flooding diminishes. However, the weather can still be unpredictable, with some years experiencing unseasonably warm or cool spells.

While Lake Michigan continues to influence the climate in eastern cities like Milwaukee, its effect becomes less prominent compared to the summer months. The lake's moderation of temperatures is still present but less impactful as the air naturally cools.

Daylight continues its decline, reducing the amount of available sunlight for outdoor activities. Yet, this period is popular for apple picking, hiking, and enjoying the vibrant fall foliage, which begins its appearance in late September, especially in the northern regions.

September is a significant month for Wisconsin farmers. It often marks the harvest season for various crops, including early varieties of apples and the last cuttings of hay. As the temperature drops and daylight hours decrease, both agricultural and recreational activities reflect this seasonal shift. The state's natural beauty begins to transform, offering unique vistas that attract tourists and delight residents, setting the stage for the deeper changes that October will bring.

---

• Madison - September »
  In Madison in September, during 3.5 rainfall days, 0.43" of precipitation is typically accumulated. September ushers in a minute temperature change with average high-temperatures reducing from August's moderately hot 77.4°F to an agreeable 71.1°F.
• Milwaukee - September »
  On the first day of September in Milwaukee sunrise is at 6:16 am and sunset at 7:27 pm. On the last day of September, in Milwaukee sunrise is at 6:47 am and sunset at 6:35 pm CDT.
• Green Bay - September »
  The mild weather, coupled with the beautiful fall foliage, makes September an ideal time for sightseeing and enjoying the natural beauty of Green Bay. In Green Bay, snow does not fall in June through September.
• Kenosha - September »
  In Kenosha, Wisconsin, in September, the average water temperature is 67.6°F. In Kenosha, during September, the rain falls for 12.7 days and regularly aggregates up to 2.2" of precipitation.
• Racine - September »
  On the first day of September in Racine sunrise is at 6:15 am and sunset at 7:26 pm. In Racine, in September, during 10.6 rainfall days, 0.91" of precipitation is typically accumulated.
• Appleton - September »
  In Appleton during September, the rain falls for 12.1 days and regularly aggregates up to 1.81" of precipitation. On the first day of September in Appleton, sunrise is at 6:16 am and sunset at 7:30 pm.
• Waukesha - September »
  In Waukesha in September, it is raining for 10.3 days, with typically 0.87" of accumulated precipitation. In Waukesha, in September, during 10.3 rainfall days, 0.87" of precipitation is typically accumulated.
• Eau Claire - September »
  In Eau Claire, during September, the rain falls for 12.7 days and regularly aggregates up to 2.24" of precipitation. In Eau Claire, snow does not fall in June through September.
• Oshkosh - September »
  In Oshkosh, during September, the rain falls for 12 days and regularly aggregates up to 2.13" of precipitation. In Oshkosh, Wisconsin, in September, during 12 rainfall days, 2.13" of precipitation is typically accumulated.
• Janesville - September »
  On the last day of September, in Janesville, sunrise is at 6:52 am and sunset at 6:39 pm CDT. In Janesville, in September, it is raining for 10.5 days, with typically 1.22" of accumulated precipitation.
• West Allis - September »
  In West Allis snow does not fall in May through September. In West Allis, Wisconsin, snow does not fall in May through September.
• La Crosse - September »
  In La Crosse, Wisconsin, in September, during 11.9 rainfall days, 2.32" of precipitation is typically accumulated. On the last day of September, in La Crosse, sunrise is at 7:01 am and sunset at 6:48 pm CDT.