What is the air quality in Fairfax today?

The current Air Quality Index (AQI) in Fairfax is 34 (Good). PM2.5 concentration is 8.09 µg/m³.

What is the temperature in Fairfax right now?

The current temperature in Fairfax is 26.8°C (feels like 26.8°C). Humidity is 53.8% and wind speed is 18.6 km/h.

Is it safe to go outside in Fairfax?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 2.9 (Moderate).

Air Quality in Fairfax, United States

Partly Cloudy

26.8°C · 53.8% humidity

26.8°

Feels 26.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

6 stations

Nearby Monitoring Stations

AQI Forecast

27 3pm

34 6pm

37 9pm

28 12am

25 3am

25 6am

25 9am

24 12pm

Air Quality Index Trend

48h · 3 stn

View full history →

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

53.8%

Humidity

18.6 km/h

Wind E

1013.6 hPa

Pressure

2.9

UV Moderate

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.09 µg/m³

PM10

34.3 µg/m³

050100150200300500

What is the weather forecast for Fairfax?

Temperature & Precipitation

PM2.5 Trend

48h · 3 stations

PM2.58.09 µg/m³ ✓ WHO

Good

PM1034.3 µg/m³

Good

UV INDEX2.9

Moderate

Station readings (6 stations within 25 km)

8.09

Median

8.32

Average

4.8

Low

12.1

High

PM2.5 µg/m³ · Model: 16.8 · Bias: +8.7

What is the 7-day forecast for Fairfax?

07-21

29.9° 22.0°

0.31 mm

07-22

29.7° 22.1°

07-23

29.0° 18.4°

3.56 mm

07-24

25.7° 18.9°

0.31 mm

07-25

23.8° 21.2°

5.56 mm

07-26

28.1° 20.1°

5.94 mm

07-27

25.9° 22.6°

0.13 mm

Both models agree Avg diff: 3.3°C

Where are air quality stations near Fairfax?

Lee District Park - Fairfax County, Northern Virginia, USA

19.3 km PM2.5: 6.7 µg/m³

Aurora Hills Visitor Center, Northern Virginia, USA

21.4 km PM2.5: 9.4 µg/m³

3414 Nebraska Ave NW

21.7 km PM2.5: 7.2 µg/m³

GW Milken Institute School of Public Health

23.0 km PM2.5: 8.2 µg/m³

Aslin

24.9 km PM2.5: 10.9 µg/m³

901 G St NW

25.1 km PM2.5: 12.9 µg/m³

400 Virginia Ave SW

25.3 km PM2.5: 8.2 µg/m³

Ashburn - Broad Run High School, Northern Virginia, USA

25.4 km PM2.5: 10.1 µg/m³

Center City Shaw Campus

25.5 km PM2.5: 8.2 µg/m³

LAMB

26.3 km PM2.5: 6.7 µg/m³

What cities are near Fairfax?

34 Oakton 33 Burke 34 Vienna 34 Merrifield 33 Annandale 34 Idylwood 34 Tysons 34 West Falls Church 34 Wolf Trap 30 Centreville

Get AQI alerts for Fairfax

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T22:58 UTC.