Air Quality in Herndon, United States

Windy
9.4°C · 52.8% humidity
9.4°
Feels 4.8°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast Calibrated
26 11pm
26
26
26 2am
39
39
39 5am
39
39
39 8am
39
64
64 11am
64
64
64 2pm
64
39
39 5pm
39
39
39 8pm
39
39
Station readings
26
26
26
CAMS model adj -11
37
37
37
37
50
50
50
50
50
50
50
75
75
75
75
75
75
50
50
50
50
50
50
50
AD 728×90

PM2.5 Trend (24h)

23h · 1 station
52.8%
Humidity
46.0 km/h
Wind SSE
1030.5 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Herndon?

Temperature & Precipitation

PM2.55.11 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX1.4
Low
AD 300×250

What is the 7-day forecast for Herndon?

04-10
18.5° 4.5°
04-11
21.7° 8.9°
04-12
22.7° 11.6°
04-13
27.0° 13.4°
04-14
28.9° 16.7°
04-15
22.5° 18.4°
0.13 mm
04-16
17.5° 10.1°
1.63 mm
Both models agree Avg diff: 4.0°C

Where are air quality stations near Herndon?

55
Ashburn - Broad Run High School, Northern Virginia, USA
10.8 km
66
Ashburn - Broad Run High School, Northern Virginia, USA
10.8 km
38
Long Park - Haymarket, Northern Virginia, USA
25.1 km
66
Long Park - Haymarket, Northern Virginia, USA
25.1 km
32
Rockville, Maryland, USA
29.0 km
60
Lee District Park - Fairfax County, Northern Virginia, USA
32.7 km
36
Lee District Park - Fairfax County, Northern Virginia, USA
32.7 km

What cities are near Herndon?

21 Reston 15 Oak Hill 15 Sterling 28 Great Falls 21 Chantilly 28 Wolf Trap 15 South Riding 15 Ashburn 28 Oakton 28 Vienna

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-10T02:43 UTC.