FORECAST SUMMARY: Tuesday September 2nd, 2025, through Friday September 5th, 2025
Ozone:
Ozone concentrations are expected to be in the Good (Green AQI) to Moderate (Yellow AQI) range.
PM-2.5:
PM-2.5 concentrations are expected to be in the Good (Green AQI) to Moderate (Yellow AQI) range.
FORECAST DISCUSSION:
We enter the first full week of September with the official start of Meteorological Fall passing on September 1st, providing near-normal temperatures today, Tuesday, and a cool down later this week.
Tuesday will be an extension of the beautiful weather we had over the holiday weekend with temperatures in the 70s and ample sunlight. This is due to a High-pressure system sitting just to our southwest funneling in clear skies and warm air. Come midweek, however, this pattern will give way to a Low-pressure system and associated cold front that will cool us down into the 60s for southern Michigan and the 50s for the upper peninsula. With this cold front, rain showers are expected Wednesday morning through early Thursday afternoon as the cold front traverses through the state from the northwest to the southeast. On the backside of the cold front, will be a High-pressure system replacing the mid-to-late week weather regime, which will provide sunny conditions, albeit cooler. It will truly feel like Fall this upcoming weekend with temperatures ranging from the 50s to the mid-60s.
For air quality, with the cooler temperatures in place, along with shifting weather patterns, Ozone will continue to be a non-issue as the photochemical reaction that takes place to form Ozone will not have the proper ingredients to initiate. For PM-2.5, a few long-term smoke models are showing some amounts of wildfire smoke making its way down into the Midwest later this week and into the weekend. Nothing more than the Moderate range in terms of concentrations, as of now, are expected. So, in all, air quality is expected to range in the Good to Moderate range for the remainder of this week.
EXTENDED FORECAST:
As mentioned above, Fall-like weather is expected for the first full weekend of September with air quality remaining in the Good to Moderate range.
Next Forecast update: Friday September 5th, 2025