FORECAST SUMMARY: Monday October 20th, 2025, through Friday October 24th, 2025
Ozone:
Ozone concentrations are expected to be in the Good (Green 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:
After a rather wet and dreary weekend, Michiganders wake up to some sunshine and quiet conditions this Monday morning. Currently we are in a lull period between two systems with the second system expected to impact us tomorrow, Tuesday, and into Wednesday. Rainy conditions return to the entire state later on Tuesday after a cold front moves through earlier in the day. This will drop temperatures down to around seasonal norms and shift our wind direction to more northwesterly. With the upper 40s being forecasted as high temperatures on Wednesday, and lake temperatures still in the upper 50s, lake-effect rain showers will impact the state predominantly on Wednesday. This is the same process as lake-effect snow, but with temperatures still a bit above freezing, the form of precipitation will be rain. Lingering lake-effect showers persist into Thursday before we dry out on Friday and head into the weekend.
For air quality, there are two more weeks left in the official Ozone season as Ozone does not look to be a threat this week as temperatures hang around in the 40s to 50s. Aside from early morning commutes, PM-2.5 does not look to be a threat either as breezy conditions return midweek which will help to clean out any particulate build up.
EXTENDED FORECAST:
The ending of this week persists through the weekend with seasonal norms on the docket. Air quality is expected to remain in the Good range.
Next Forecast update: Friday October 24th, 2025