Green Bay, Wisconsin – The morning sun is climbing quickly, and the air already feels heavier across northeast Wisconsin. Asphalt is warming, humidity is building, and dangerous heat will intensify through the afternoon, making this one of the hottest stretches of the summer so far.
According to the National Weather Service in Green Bay, a Heat Advisory remains in effect from 11 a.m. today through 9 p.m. Tuesday. Heat index values are expected to reach 95 to 105 degrees, with the highest values across far northeast Wisconsin. Even after sunset, heat index readings may remain near 75 degrees, limiting overnight relief for those without air conditioning.
Today’s high reaches 96 degrees, while Tuesday climbs to 97 degrees with a heat index near 102 to 105 degrees. Wednesday remains hot with a high around 91 degrees before temperatures ease slightly Thursday.
Drivers traveling along Interstate 41, U.S. Highway 141, Highway 29, and Highway 172 should prepare for intense sunshine and extreme heat during the afternoon commute. Outdoor workers, athletes, and anyone attending summer events should drink water frequently, wear lightweight clothing, and take regular breaks in shaded or air-conditioned locations. Never leave children or pets inside parked vehicles, even briefly.
While the broader Midwest remains under a pattern capable of producing severe thunderstorms farther west, the dominant concern for northeast Wisconsin through Tuesday is dangerous heat. The National Weather Service warns that prolonged exposure may quickly lead to heat exhaustion or heat stroke without proper precautions.
Looking ahead, the 6-to-10-day outlook favors above-normal temperatures, suggesting additional warm weather could linger into next week even as thunderstorm chances gradually increase later this week.
Five-Day Forecast for Green Bay, Wisconsin
- Today: Sunny and hot. High 96°F. Heat index up to 105°F. Low 73°F.
- Tuesday: Sunny and hot. High 97°F. Heat index near 102°F. Low 72°F.
- Wednesday: Sunny and hot. High 91°F. Low 67°F.
- Thursday: Mostly sunny. High 87°F. Low 67°F. Slight chance of late thunderstorms.
- Friday: Mostly sunny. High 88°F. Chance of afternoon showers and thunderstorms.
