Worst air pollution Mount Vernon, today and tomorrow
Today (20 September): Air quality in Mount Vernon is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (NO2: 35.5/100).
Tomorrow (21 September 2026): Air quality in Mount Vernon is moderate. AQI worsens to moderate; NO2 increases to moderate; all other pollutants stay as today. Pollution peaks around 4:00 PM (NO2: 40.6/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Central ohio regional air is what shapes air quality most in Mount Vernon, and air quality is generally good outside of ragweed season. That mix of factors is fairly representative of towns in this part of the country. Longer-term residents of Mount Vernon tend to plan outdoor activity around these predictable shifts.
Today - 20 September | Pollution peaks at 17:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
13.9/100
PM10 (coarse particles):
Good
6.6/100
NO2 (nitrogen dioxide):
Fair
35.5/100
O3 (ozone):
Fair
24.1/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
7.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 16:00
AQI:
Moderate
40.6/100
PM2.5 (fine particles):
Good
11.3/100
PM10 (coarse particles):
Good
6.4/100
NO2 (nitrogen dioxide):
Moderate
40.6/100
O3 (ozone):
Fair
27.3/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
4.4/100
PM1 (ultrafine particles):
Good
4.4/100
Pollen forecast in Mount Vernon
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Mount Vernon
Sports venues in Mount Vernon
Frequently Asked Questions
Is air quality bad in Mount Vernon right now?
On 20 September 2026, overall air quality in Mount Vernon is fair. AQI is the main air quality indicator at 35.5/100. Pollution peaks around 5:00 PM (NO2: 35.5/100).
Will air quality be worse tomorrow in Mount Vernon?
On 21 September 2026, air quality conditions in Mount Vernon will be worse than today, with AQI forecast at moderate at 40.6/100. Pollution peaks around 4:00 PM (NO2: 40.6/100).
When is air pollution at its worst in Mount Vernon?
Mount Vernon's air quality follows a clear seasonal pattern: the cleanest stretches usually come in spring and fall, between the summer ozone season and the calmer winter pollution episodes, but prolonged summer heat waves are when air quality most often dips into unhealthy territory. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Mount Vernon 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 20 September 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
Get the full experience in the Airmine app.