Winchester, Virginia Air Quality
Winchester air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
Winchester, VA · Air quality right now
The air quality index in Winchester, VA is 26 (Good) right now — safe for outdoor activity.
Is it safe to be outside in Winchester today?
AQI 26 Yes — air quality is Good
Air is clean — great for outdoor activity.Main pollutant: PM2.5Observed 9:00 AM EDT
Pollutants right now
- PM2.55.8 µg/m³Main pollutantfine particles — smoke, exhaust, soot
- PM105.9 µg/m³coarse particles — dust, pollen, ash
- Ozone49 µg/m³smog — builds on hot, sunny days
- NO₂2.8 µg/m³nitrogen dioxide — traffic, combustion
ExerciseOK to run — no air-quality limits on outdoor exercise.
How to read Winchester’s air quality
Guides: The AQI Scale, Explained · Air Quality Alerts, Decoded · How to Read a Wildfire Smoke Map · Why Wildfire Smoke Travels 1,000 Miles.
Air quality over time in Winchester
Across the EPA’s county records from 2020 to 2020, Winchester’s cleanest year was 2020 (median AQI 6) and its most polluted was 2020 (median AQI 6); the typical (median) day has held roughly steady since 2020.
| Year | Median AQI | Unhealthy+ | Main pollutant | USG | Moderate | Good |
|---|---|---|---|---|---|---|
| 2020 | 6 | 0 | PM10 | 0 | 0 | 58 |
“USG” is Unhealthy for Sensitive Groups (AQI 101–150); “Unhealthy+” combines the Unhealthy, Very Unhealthy, and Hazardous days. In 2024 the EPA tightened the annual fine-particle (PM2.5) standard to 9 µg/m³ from the previous 12 µg/m³, so counties near the old limit read worse against the new one. Source: EPA AQS annual summaries, 2020.
Frequently asked
- What was the worst year for air quality in Winchester?
- No day in Winchester's county topped AQI 100 in the EPA's 2020 records. The highest median AQI came in 2020, at 6.
- How many unhealthy air days does Winchester have?
- None: across 2020, no day in Winchester's county had an AQI above 100 in the EPA's records (58 days reported).
- What's the main air pollutant in Winchester?
- PM10: it drove Winchester's county AQI on the most days in every year of the EPA's 2020 records.