FORECAST SUMMARY: Friday October 24th, 2025, through Monday October 27th, 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 low-Moderate (Yellow AQI) range.
FORECAST DISCUSSION:
A Pure Michigan Fall weekend is ahead for the last weekend of October with clear skies and temperatures right around seasonal norms. After a few days of dreary and rainy weather, dry air via high-pressure moved in overnight which is reasoning for why most of us are under blue skies this Friday morning.
This high-pressure will persist through the weekend providing light winds and easterly to southeasterly flow which will keep our surface temperatures right what seasonal averages for this time of year. Going into Saturday night, it appears some precipitation tries to develop but a dominating dry airmass will dissipate any chance for precipitation to fall. Speaking of Saturday night, whether you are a Michigan fan or Michigan State fan (Go Blue!) it will be perfect football weather for the two rivals to square off in East Lansing. More of the same on Sunday as the high-pressure hangs around throughout the weekend and into the start of the next work week.
For air quality, there is one more full week for the official Ozone season as Ozone continues to be a nonissue as our surface temperatures continue to slowly decrease. With light winds in place, especially during the mornings, it would not be surprising to see an increase of PM-2.5 concentrations in the populated areas. As each day carries on, however, these concentrations are expected to decrease.
EXTENDED FORECAST:
The last full work week of October starts off with seasonal average temperatures and clear skies. Air quality will continue to remain in the Good range.
Next Forecast update: Monday October 27th, 2025