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 Monday, August 17 - 5:13 p.m.

Tuesday's Forecast (August 18)

The next boundary will work through the state Monday night through Tuesday evening. Showers/storms are expected along and ahead of the boundary, with strong to severe storms possible across the southern half of the state. Statewide Good (Green) AQI is forecast.

Wednesday's Forecast (August 19)

Another comfortable and fresh high pressure air mass will move over the state allowing statewide Good (Green) AQI to continue.

Thursday’s Forecast Trend (August 20)

Air quality is expected to remain satisfactory.

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].