Air Quality in Herndon, United States

Partly Cloudy
26.0°C · 63.9% humidity
26.0°
Feels 26.0°
16
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
24 12pm
24
24
16 3pm
19
20
22 6pm
23
32
33 9pm
33
26
27 12am
27
25
25 3am
25
25
25 6am
25
25
34 9am
34
34
AD 728×90

Air Quality Index Trend

47h · 2 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.

63.9%
Humidity
31.6 km/h
Wind ENE
1018.1 hPa
Pressure
7.9
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
16
3.8 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Herndon?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.53.8 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX7.9
Very High
AD 300×250
Station readings (1 station within 25 km)
3.8
Median
3.8
Average
3.8
Low
3.8
High
PM2.5 µg/m³ · Model: 6.25 · Bias: +2.5

What is the 7-day forecast for Herndon?

05-29
26.0° 9.1°
7.5 mm
05-30
24.1° 17.2°
2.25 mm
05-31
29.0° 9.2°
06-01
30.1° 12.8°
2.44 mm
06-02
25.1° 12.4°
06-03
25.4° 20.6°
5.94 mm
06-04
23.0° 19.9°
2.12 mm
Both models agree Avg diff: 4.8°C

Where are air quality stations near Herndon?

32
Ashburn - Broad Run High School, Northern Virginia, USA
10.8 km PM2.5: 7.7 µg/m³
35
Long Park - Haymarket, Northern Virginia, USA
25.1 km PM2.5: 8.4 µg/m³
31
Lee District Park - Fairfax County, Northern Virginia, USA
32.7 km PM2.5: 7.4 µg/m³

What cities are near Herndon?

16 Reston 15 Oak Hill 16 Sterling 23 Great Falls 15 Chantilly 20 Wolf Trap 15 South Riding 16 Ashburn 18 Oakton 18 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 2026-05-29T19:14 UTC.