Department meteorologists use monitoring data and weather forecast models to predict Wisconsin's future ozone (O₃) and fine particulate matter (PM_2.5) air quality using the Air Quality Index (AQI) [exit DNR]. This forecast is updated frequently, and when warranted, an Air Quality Advisory is issued. Below is the latest air quality forecast for Wisconsin.

Updated Thursday, June 25 - 5:20 p.m.

Friday's Forecast (June 26)

High pressure over the northern Great Lakes will help to keep a low pressure system mostly south of the state, with a small chance for precipitation in far southeastern areas. A cool easterly flow off of Lake Michigan will help to maintain Good (Green) AQI.

Saturday's Forecast (June 27)

The northern Great Lakes high will allow flow off Lake Michigan to maintain at to slightly below normal temperatures and Good (Green) AQI.

Sunday’s Forecast Trend (June 28)

Air quality may begin to degrade as the weather pattern shifts and a lengthy stretch of above normal temperatures sets in.

Forecast Maps:

The black dots represent the approximate location of Wisconsin's air quality monitors. The black borders approximate Wisconsin's Reporting Area boundaries on EPA's AirNow website [exit DNR].

Air Quality Index (AQI) ranges

For more information about AQI ranges and colors, see the U.S. EPA's Air Quality Index (AQI) Basics [exit DNR].