FORECAST SUMMARY: Monday July 7th, 2026, through Tuesday, July 10th, 2026
Ozone:
Ozone concentrations in the Good (AQI Green) to Moderate (AQI Yellow) range are expected Tuesday with a chance for USG (AQI Orange) in the west on Wednesday.
PM2.5:
PM2.5 concentrations are expected to average between Good and Moderate.
The Air Quality Alert is in effect for the following Michigan counties:
Muskegon, Ottawa, Kent, Allegan, Barry, Van Buren, Berrien, Cass
FORECAST DISCUSSION:
High pressure will remain in control across central and southern areas through Wednesday. A weak boundary will drift into northern sections today (Tuesday), bringing precipitation chances there, while southern areas experience sunshine, warm temperatures, and comfortable humidity. On Wednesday, the boundary will sag southward, introducing precipitation chances from Wednesday into Thursday. After the front passes, high pressure will build in from the north, ending precipitation from north to south. Some showers may linger in southern areas, but most locations will see dry conditions and seasonably comfortable temperatures.
A shift to northeasterly winds on Thursday will help improve air quality across much of the state as high pressure settles into the region. Pollution levels behind the departing boundary are expected to improve, with ozone and PM2.5 generally ranging from upper Good to middle Moderate through the end of the week. We are monitoring ongoing wildfire activity in Canada, which could influence Michigan’s air if smoke drifts southward. At this time, no significant smoke impacts are expected. However, if conditions change and smoke begins moving into the state, air quality may deteriorate, and an updated forecast will be issued before the scheduled Friday update.
EXTENDED FORECAST:
Air quality in the Moderate range may persist into the extended period.
Next Forecast update: Friday, July 10th, 2026