Worst air pollution Downtown Winston-Salem - Winston-Salem, today and tomorrow
Today (20 September): Air quality in Downtown Winston-Salem is fair. AQI, PM2.5, and PM10 are fair; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (PM2.5: 26.5/100).
Tomorrow (21 September 2026): Air quality in Downtown Winston-Salem is fair. NO2 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (PM2.5: 32.1/100). Airmine updates local air quality forecasts four times daily.
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As the city's compact downtown core, Downtown Winston-Salem experiences air quality conditions similar to the rest of Winston-Salem, following the same broader regional pattern. Any local variation tends to be minor compared with the seasonal swings seen across the wider city.
Today - 20 September | Pollution peaks at 11:00
AQI:
Fair
26.5/100
PM2.5 (fine particles):
Fair
26.5/100
PM10 (coarse particles):
Fair
21.5/100
NO2 (nitrogen dioxide):
Good
13.2/100
O3 (ozone):
Good
20.0/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
6.2/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 10:00
AQI:
Fair
32.1/100
PM2.5 (fine particles):
Fair
32.1/100
PM10 (coarse particles):
Fair
24.5/100
NO2 (nitrogen dioxide):
Fair
22.1/100
O3 (ozone):
Fair
20.7/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
5.9/100
Other Landmarks in Winston-Salem
Sports venues in Winston-Salem
Frequently Asked Questions
Is air quality bad in Downtown Winston-Salem right now?
On 20 September 2026, overall air quality in Downtown Winston-Salem is fair. AQI is the main air quality indicator at 26.5/100. Pollution peaks around 11:00 AM (PM2.5: 26.5/100).
Will air quality be worse tomorrow in Downtown Winston-Salem?
On 21 September 2026, air quality conditions in Downtown Winston-Salem will be similar to today, with AQI forecast at fair at 32.1/100. Pollution peaks around 10:00 AM (PM2.5: 32.1/100).
When is air pollution at its worst in Downtown Winston-Salem?
Air quality at Downtown Winston-Salem shifts across the year, as once summer humidity fades, winter typically offers the most consistently clean air; by contrast, summer heat, humidity, and emissions from surrounding forests combine to drive ozone levels up. Occasional agricultural or prescribed-burning smoke can add short-lived particulate spikes outside the main summer ozone season.
Are air quality levels in Downtown Winston-Salem 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: 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.
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