Weather
Green Bay, WI Weather: Storms and Waning Humidity on Wednesday
Green Bay residents should prepare for Wednesday morning storms followed by a refreshing drop in humidity and crisp, sunny autumn weather later this week.
By Avery Collins · 2026-09-06T08:10:38.215Z
Green Bay, WI — Wisconsin residents can anticipate a brief mid week weather shift that will wash away the muggy air and usher in a quintessential fall feeling. While the early part of the week remains relatively settled, a potent cold front is tracking toward the region, promising a volatile transition before things settle down for the latter half of the week. Meteorologists are now tracking the arrival of a significant line of showers and thunderstorms that will cross the area early Wednesday, marking a turning point in the local climate pattern.
By the time you wake up on Wednesday, the worst of the activity should be pushing off to the east. Expect to see showers and thunderstorms lingering before 7 a.m., potentially causing slick spots for commuters navigating US 41 or surrounding arterial roads. Allow yourself extra travel time during the Wednesday morning commute as wet pavement and lingering cloud cover could complicate early transit. As the storm system sweeps through, it will scour out the humidity, leaving behind a much drier, sharper atmosphere that signals the true onset of autumn.
Once the skies clear by mid morning Wednesday, the day transitions into a beautiful, mostly sunny afternoon with a high near 79 degrees. This shift toward cooler, lower humidity air is a hallmark of September as we move away from the sweltering heat of mid summer. The crisp air will feel refreshing after the mugginess predicted for Tuesday, offering a preview of the sweater weather that typically defines northern Wisconsin in the coming weeks. If you have been waiting to enjoy the changing foliage or harvest season activities, Wednesday afternoon presents an ideal window once the rain clears.
As Wednesday turns into Wednesday night, temperatures will drop toward a low of 58 degrees. This cooling trend will continue into Thursday, reinforcing the seasonal move toward shorter days and longer, darker evenings. Residents should prepare for these shifts by ensuring home heating systems are ready and keeping light jackets accessible for the lengthening evenings. While we aren't seeing frost yet, the trend toward 50 degree nights reminds us that the first freeze of the year is steadily approaching as the season progresses. The contrast between our recent warm days and the upcoming cooler, post storm air is sharp, so pay close attention to local updates as the front moves across the state.
We are closely monitoring the system to see how quickly it clears the region, as timing is everything for our mid week plans. If you are planning travel through central Wisconsin or across the state, keep an eye on radar updates through Tuesday night when the risk of precipitation reaches its peak at 80 percent. Conditions may deteriorate quickly after sunset Tuesday, so please prioritize safety if you have late night plans. Traveling this week? Tell us what conditions you are seeing in your neighborhood.
For the latest hyperlocal forecast, radar, and active alerts for Green Bay, visit the National Weather Service Green Bay page .
Tuesday: Chance of Showers and Thunderstorms, 80/69 Wednesday: Showers and Thunderstorms, 79/58 Thursday: Sunny, 74/56 Friday: Sunny, 77/60 Saturday: Slight Chance of Showers and Thunderstorms, 77/N/A Have something happening in your community? Hit the red Post/Submit button above to share events, classifieds, stories and local updates with Country Herald. SUPPORT LOCAL INDEPENDENT NEWS! Have a tip? Message us!