What is the air quality in Clayton today?

The current Air Quality Index (AQI) in Clayton is 22 (Good). PM2.5 concentration is 5.24 µg/m³.

What is the temperature in Clayton right now?

The current temperature in Clayton is 29.8°C (feels like 32.7°C). Humidity is 50.0% and wind speed is 44.7 km/h.

Is it safe to go outside in Clayton?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 19.9 (Extreme).

Air Quality in Clayton, United States

Windy

29.8°C · 50.0% humidity

29.8°

Feels 32.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

5 stations

Nearby Monitoring Stations

AQI Forecast

54 11am

22 2pm

30 5pm

25 8pm

26 11pm

24 2am

24 5am

25 8am

Air Quality Index Trend

42h · 5 stn

View full history →

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

50.0%

Humidity

44.7 km/h

Wind NE

1012.7 hPa

Pressure

19.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.24 µg/m³

PM10

20.55 µg/m³

050100150200300500

What is the weather forecast for Clayton?

Temperature & Precipitation

PM2.5 Trend

42h · 5 stations

PM2.55.24 µg/m³ ✓ WHO

Good

PM1020.55 µg/m³

Good

UV INDEX19.9

Extreme

Station readings (5 stations within 25 km)

5.24

Median

7.88

Average

4.8

Low

10.1

High

PM2.5 µg/m³ · Model: 7.35 · Bias: +2.1

What is the 7-day forecast for Clayton?

07-21

32.6° 24.2°

07-22

28.6° 22.4°

07-23

21.4° 20.4°

0.31 mm

07-24

30.3° 19.8°

0.56 mm

07-25

27.0° 20.3°

2.81 mm

07-26

33.3° 24.1°

1.25 mm

07-27

31.2° 22.7°

Both models agree Avg diff: 3.7°C

Where are air quality stations near Clayton?

Forest Park, Missouri, USA

3.9 km PM2.5: 7.2 µg/m³

East St. Louis, Illinois, USA

14.6 km PM2.5: 21.6 µg/m³

Arnold West, Missouri, USA

22.5 km PM2.5: 30.2 µg/m³

Arnold West, Missouri, USA

22.5 km PM2.5: 14.5 µg/m³

What cities are near Clayton?

23 University City 25 Webster Groves 24 Overland 24 Creve Coeur 27 Kirkwood 30 Affton 39 St. Louis 28 Ferguson 23 Maryland Heights 32 Lemay

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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 2026-07-21T19:45 UTC.