Coolest air of the season on the way Published: September 2, 2025 at 4:25 PM Tags: Forecast, Metro Detroit, Metro Detroit Weather The coldest air of the season is heading to Metro Detroit this week. (WDIV) Some big changes are on tap in the near future, weather-wise, in the form of rain and some very cold air. First, though, we have the rest of this Tuesday, which still features the very slight chance for one or two isolated showers. These chances are pretty slim, but can’t be completely ruled out.