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Chantilly (Virginia) (US)

Air Quality Trend (last 7 days)

Good (0-50)
Moderate (51-100)
Unhealthy for Sensitive Groups (101-150)
Unhealthy (151-200)
Very Unhealthy (201-300)
Hazardous (300+)

Weather - 48h MET Norway

Light rain
12°C
Light rain
Humidity
86.3%
Wind
6 m/s
Pressure
1014.5 hPa
Direction
138°
Sunrise
05:00
Sunset
17:00
24h Forecast:
Temp.
6° / 20°
Precip.
30.8mm
Max wind
10.2 m/s

Hourly Forecast

16.03
Now
Weather
12°
0.2
6
16.03
04:00
Weather
13°
0.1
6
16.03
05:00
Weather
13°
0.1
6
16.03
06:00
Weather
13°
0.1
5
16.03
07:00
Weather
14°
5
16.03
08:00
Weather
14°
6
16.03
09:00
Weather
15°
6
16.03
10:00
Weather
16°
0.2
6
16.03
11:00
Weather
16°
0.1
7
16.03
12:00
Weather
17°
0.5
8
16.03
13:00
Weather
17°
6.8
7
16.03
14:00
Weather
17°
0.6
7
16.03
15:00
Weather
19°
0.8
9
16.03
16:00
Weather
19°
0.2
9
16.03
17:00
Weather
20°
0.5
9
16.03
18:00
Weather
19°
2
8
16.03
19:00
Weather
18°
0.4
9
16.03
20:00
Weather
18°
0.2
8
16.03
21:00
Weather
19°
1.9
8
16.03
22:00
Weather
18°
1.5
9
16.03
23:00
Weather
17°
6.6
9
17.03
00:00
Weather
12°
5.1
10
17.03
01:00
Weather
2.4
7
17.03
02:00
Weather
0.5
6

Temperature

20°C
6°C
03:00
12°C
04:00
13°C
05:00
13°C
06:00
13°C
07:00
14°C
08:00
14°C
09:00
15°C
10:00
16°C
11:00
16°C
12:00
17°C
13:00
17°C
14:00
17°C
15:00
19°C
16:00
19°C
17:00
20°C
18:00
19°C
19:00
18°C
20:00
18°C
21:00
19°C
22:00
18°C
23:00
17°C
00:00
12°C
01:00
7°C
02:00
6°C
03:00 14:00 02:00

Precipitation

6.8mm
0mm
03:00
0.2mm
04:00
0.1mm
05:00
0.1mm
06:00
0.1mm
10:00
0.2mm
11:00
0.1mm
12:00
0.5mm
13:00
6.8mm
14:00
0.6mm
15:00
0.8mm
16:00
0.2mm
17:00
0.5mm
18:00
2mm
19:00
0.4mm
20:00
0.2mm
21:00
1.9mm
22:00
1.5mm
23:00
6.6mm
00:00
5.1mm
01:00
2.4mm
02:00
0.5mm
03:00 14:00 02:00

Wind

10.2m/s
0m/s
03:00
6.2 m/s
04:00
6 m/s
05:00
6 m/s
06:00
5.3 m/s
07:00
5.2 m/s
08:00
5.6 m/s
09:00
6.1 m/s
10:00
6.2 m/s
11:00
7 m/s
12:00
7.5 m/s
13:00
6.9 m/s
14:00
7.4 m/s
15:00
9.2 m/s
16:00
8.6 m/s
17:00
9.4 m/s
18:00
7.9 m/s
19:00
8.8 m/s
20:00
7.7 m/s
21:00
8.4 m/s
22:00
9.4 m/s
23:00
8.9 m/s
00:00
10.2 m/s
01:00
7.3 m/s
02:00
6.3 m/s
03:00 14:00 02:00

Radiation

No sensor within 100 km.

We display the worst measurements from all stations in the area. This approach provides a more cautious assessment of air quality, accounting for local pollution sources.

AQI
93.5 km
88
29.3%

Measurement time: 2026-03-16 02:00

Calculated from PM2.5/PM10

O3
98 km
115.87 µg/m3
72.4%

Measurement time: 2026-03-16 03:08

source: OpenWeatherMap

PM2.5
93.5 km
30 µg/m3
35.7%

Measurement time: 2026-03-16 02:00

source: Aqicn

PM10
98 km
8.32 µg/m3
5.9%

Measurement time: 2026-03-16 03:08

source: OpenWeatherMap

CO
98 km
0.14273 mg/m3
1%

Measurement time: 2026-03-16 03:08

source: OpenWeatherMap

NO2
98 km
1.84 µg/m3
0.9%

Measurement time: 2026-03-16 03:08

source: OpenWeatherMap

SO2
98 km
0.71 µg/m3
0.2%

Measurement time: 2026-03-16 03:08

source: OpenWeatherMap

About Air Quality in Chantilly

Air quality in Chantilly is monitored in real-time by sensors and measurement stations. On this page you'll find current data on major air pollutants including particulate matter PM2.5 and PM10, nitrogen dioxide (NO2), ozone (O3), and radiation levels.

Common Pollutants in Chantilly

  • PM2.5 - fine particulate matter up to 2.5 micrometers, particularly harmful to health
  • PM10 - particulate matter up to 10 micrometers from traffic and industry
  • NO2 - nitrogen dioxide mainly emitted by vehicles
  • O3 - tropospheric ozone formed in photochemical reactions

When is Air Quality Best in Chantilly?

Generally, the best air quality occurs:

  • Early morning (5:00-7:00 AM) before rush hour traffic
  • After rainfall which cleanses the atmosphere
  • During strong winds that disperse pollutants
  • In summer months when heating systems are less used

Tips for Runners in Chantilly

If you're planning outdoor activities in Chantilly, always check the current AQI value. When AQI exceeds 100, consider moving your workout indoors or shortening the distance. People with respiratory issues, children, and seniors should be especially cautious during elevated pollution levels. Choose routes away from busy streets and industrial areas.