Air Quality in Herndon, United States

Windy
13.2°C · 68.3% humidity
13.2°
Feels 13.2°
15
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
25 10pm
25
25
15 1am
18
20
21 4am
22
23
26 7am
26
26
27 10am
27
34
27 1pm
27
27
27 4pm
27
27
27 7pm
27
34
AD 728×90

Air Quality Index Trend

47h · 3 stn

Herndon's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

68.3%
Humidity
55.4 km/h
Wind WNW
1005.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
15
3.6 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Herndon?

Temperature & Precipitation

PM2.5 Trend

47h · 3 stations
PM2.53.6 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (1 station within 25 km)
3.6
Median
3.6
Average
3.6
Low
3.6
High
PM2.5 µg/m³ · Model: 6.0 · Bias: +2.4

What is the 7-day forecast for Herndon?

06-09
30.3° 13.2°
0.06 mm
06-10
27.9° 23.4°
4.56 mm
06-11
24.6° 10.7°
06-12
29.8° 15.9°
0.06 mm
06-13
29.9° 19.1°
0.44 mm
06-14
27.2° 19.7°
4.19 mm
06-15
23.9° 11.9°
0.25 mm
Both models agree Avg diff: 5.8°C

Where are air quality stations near Herndon?

20
Ashburn - Broad Run High School, Northern Virginia, USA
10.8 km PM2.5: 4.8 µg/m³
42
Long Park - Haymarket, Northern Virginia, USA
25.1 km PM2.5: 10.1 µg/m³
37
Lee District Park - Fairfax County, Northern Virginia, USA
32.7 km PM2.5: 8.9 µg/m³

What cities are near Herndon?

15 Reston 15 Oak Hill 15 Sterling 21 Great Falls 15 Chantilly 18 Wolf Trap 15 South Riding 15 Ashburn 15 Oakton 15 Vienna
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T05:24 UTC.