Air Quality in Clayton, United States

Windy
31.8°C · 44.1% humidity
31.8°
Feels 34.6°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
5 stations

Nearby Monitoring Stations

AQI Forecast
25 7am
25
25
36 10am
33
33
31 1pm
28
27
26 4pm
26
26
26 7pm
34
54
54 10pm
54
54
34 1am
34
27
27 4am
25
25
AD 728×90

Air Quality Index Trend

45h · 5 stn

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. Current PM2.5 concentration in Clayton is 1.7× the WHO annual guideline of 5 µg/m³.

44.1%
Humidity
42.0 km/h
Wind N
1020.0 hPa
Pressure
10.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
36
8.57 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Clayton?

Temperature & Precipitation

PM2.5 Trend

45h · 5 stations
PM2.58.57 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX10.9
Extreme
AD 300×250
Station readings (5 stations within 25 km)
8.57
Median
9.78
Average
8.2
Low
15.9
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -2.3

What is the 7-day forecast for Clayton?

05-29
31.8° 9.5°
2.06 mm
05-30
31.4° 19.8°
1.69 mm
05-31
32.8° 13.8°
06-01
31.5° 19.0°
06-02
27.3° 16.9°
06-03
30.9° 26.0°
0.94 mm
06-04
29.6° 20.3°
3.31 mm
Both models agree Avg diff: 4.5°C

Where are air quality stations near Clayton?

24
Forest Park, Missouri, USA
3.9 km PM2.5: 5.8 µg/m³
30
East St. Louis, Illinois, USA
14.6 km PM2.5: 7.2 µg/m³
15
Arnold West, Missouri, USA
22.5 km PM2.5: 3.6 µg/m³
38
Arnold West, Missouri, USA
22.5 km PM2.5: 9.1 µg/m³

What cities are near Clayton?

36 University City 37 Webster Groves 38 Overland 37 Creve Coeur 37 Kirkwood 38 Affton 50 St. Louis 42 Ferguson 39 Maryland Heights 39 Lemay
Get AQI alerts for Clayton

Notify me when air quality reaches:

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 2026-05-29T15:25 UTC.