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 Monday, November 3 - 10:15 AM

Monday, November 3 - Sunday, November 9, 2025

Ozone

Good (Green) AQI levels.

Particle pollution (PM_2.5)

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

Short-Term Forecast Maps:

Forecast AQI maps for the short-term forecast period.

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)

Sunshine, breezy west winds, and seasonably warm temperatures are in store for Monday as high pressure moves towards the eastern US. Winds then turn southerly on Tuesday as a weak system develops in the Plains, maintaining seasonably warm temperatures. As the system moves through late Tuesday into Wednesday morning, increasing precipitation chances will be in place (mostly across northern Wisconsin) before winds turn more northwesterly behind the system Wednesday afternoon, leading to drier and cooler conditions. Although Good (Green) AQI is forecast statewide through the short-term period, slight increases in PM2.5 concentrations are anticipated with the passage of the system, leading to the potential for Low-Moderate (Low-Yellow) AQI PM2.5 for the southern half of the state.

Extended Outlook (Days 4-7)

Good AQI is forecast through the extended period. An active fall pattern looks to continue Thursday as high pressure quickly moves through the Great Lakes and low pressure develops in the northern Plains. Precipitation chances will be on the rise Thursday evening before arriving along and ahead of the associated cold front Thursday night through Friday morning. Cooling temperatures will then in place for Friday before the next system arrives over the weekend, bringing chances for light snow showers with it.

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].