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 Friday, June 5 - 4:00 p.m.

Saturday's Forecast (June 6)

Precipitation chances will clear the state through the early a.m. hours as mostly sunny skies develop and hot temperatures prevail. Despite this, mostly Good (Green) AQI ozone should continue across the northern half of the state, but Moderate (Yellow) AQI ozone will be possible across southern Wisconsin.

Sunday's Forecast (June 7)

It will remain mostly sunny and hot with breezy southeasterly flow developing from west to east. Precipitation chances will also be on the increase over western areas through the p.m. hours. Mostly Good (Green) AQI is expected to the north and east, with better chances for Moderate (Yellow) AQI ozone to the south and west.

Monday’s Forecast Trend (June 8)

Air quality is expected to improve inland but may degrade closer to Lake Michigan.

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].