Worst air pollution Willmar, today and tomorrow
Today (9 August): Air quality in Willmar is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 AM (NO2: 45.9/100).
Tomorrow (10 August 2026): Air quality in Willmar is fair. All pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 45.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Willmar experiences air quality conditions shaped chiefly by open west-central Minnesota air, and air quality is generally good outside of ragweed season. Willmar doesn't see much year-to-year variation in this basic pattern, though individual weeks can differ. Wind direction on any given day can shift things noticeably from the seasonal norm.
Today - 9 August | Pollution peaks at 01:00
AQI:
Medium
45.9/100
PM2.5 (fine particles):
Good
16.3/100
PM10 (coarse particles):
Good
9.7/100
NO2 (nitrogen dioxide):
Medium
45.9/100
O3 (ozone):
Fair
37.4/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.9/100
PM1 (ultrafine particles):
Good
12.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 00:00
AQI:
Medium
45.8/100
PM2.5 (fine particles):
Good
18.9/100
PM10 (coarse particles):
Good
12.1/100
NO2 (nitrogen dioxide):
Medium
45.8/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.5/100
PM1 (ultrafine particles):
Good
13.3/100
Pollen forecast in Willmar
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Willmar
Frequently Asked Questions
Is air quality bad in Willmar right now?
On 9 August 2026, overall air quality in Willmar is fair. O3 is the main pollutant at 37.4/100. Pollution peaks around 1:00 AM (NO2: 45.9/100).
Will air quality be worse tomorrow in Willmar?
On 10 August 2026, air quality conditions in Willmar will be similar to today, with O3 forecast at fair at 34.1/100. Pollution peaks around 12:00 AM (NO2: 45.8/100).
When is air pollution at its worst in Willmar?
Like most US cities, Willmar sees air quality shift from season to season, as a quiet stretch in deep winter is often the cleanest time, once the growing-season dust has settled; by contrast, summer heat and humidity drive ozone formation, and agricultural dust can spike particulate levels during planting and harvest. Because the land is so open here, air quality tends to bounce back quickly once the wind returns.
Are air quality levels in Willmar based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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