FORECAST SUMMARY: Friday, October 3, 2025 - Monday, October 6, 2025
Ozone: 8-hour ozone concentrations are expected to range between upper Good (Green AQI) and Moderates (Yellow AQI).
PM-2.5: 24-hour daily average Fine Particulate concentrations will average mostly Moderate.
FORECAST DISCUSSION:
The big story for this forecast period will be the unseasonably warm temperatures. Highs today (Friday) through Sunday are forecast to reach into the 80s across most of the state. This is due to high pressure and southerly winds, which increase as the weekend progresses. As the new week starts, a frontal boundary will be moving into the Upper Peninsula. As this system moves in, it brings with it some much-needed rain Monday up north, pushing south later Monday into Tuesday.
As for air quality, the warm surface and upper-level temperatures could allow for Moderate ozone levels this forecast period. However, with it being so late in the season, readings higher than Moderate are not anticipated. Southerly winds will also allow fine particulates to increase, with mostly Moderate levels expected through the period.
EXTENDED FORECAST:
Extended models show a cold front passing northwest to southeast through the state Monday. This boundary brings with it precipitation and cooler temperatures. Air quality in the Moderate range should improve back towards the Good range on Tuesday.
Next Forecast update: Monday, October 6, 2025