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 two-to-three times weekly throughout the year, and when warranted, an Air Quality Advisory is issued. Below is the latest air quality forecast for Wisconsin.

Updated Thursday, February 5 - 10:30 AM

Thursday, February 5 - Sunday, February 11, 2026

Ozone

Good (Green) AQI levels.

Particle pollution (PM_2.5)

Good (Green) to Moderate (Yellow) AQI levels.

Short-Term Forecast Maps:

The black dots represent the approximate location of Wisconsin's air quality monitors. Read the forecast summaries below for further geographic information.

Short-Term Forecast (Days 1-3)

Low pressure moving across Ontario Province Thursday will bring a couple rounds of snow chances to Wisconsin before a polar air mass dives south behind an associated cold front on Friday. Ahead of this front, Moderate (Yellow) AQI PM2.5 will be likely statewide on Thursday. On Friday, Moderate (Yellow) AQI PM2.5 will trend towards Good (Green) AQI with the passage of the front. Good (Green) AQI will continue Saturday, although as high pressure moves overhead and winds weaken before turning southerly, PM2.5 concentrations will be on the increase later Saturday into Sunday.

Extended Outlook (Days 4-7)

A southerly component to the flow Sunday will likely lead to Moderate AQI PM2.5 for most. Long-range model solutions at the surface then diverge as a blocking pattern is forecast to continue in the upper-levels. Moderate AQI will be most likely to persist if we remain in southerly or light flow. However, there are chances that northerly flow could develop as early as Tuesday, which would bring chances for Good AQI.

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].