Air Quality in Clayton, United States

Windy
25.6°C · 47.5% humidity
25.6°
Feels 25.6°
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
23 5pm
23
23
40 8pm
35
32
29 11pm
27
26
25 2am
25
24
24 5am
24
23
3 8am
23
23
23 11am
23
23
3 2pm
3
3
Station readings 47h ago
AQI 23
PM2.5 5.5 µg/m³ · 47h ago
AD 728×90

Air Quality Index Trend

34h · 4 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.

47.5%
Humidity
56.4 km/h
Wind NE
1017.7 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
40
9.74 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Clayton?

Temperature & Precipitation

PM2.5 Trend

34h · 4 stations
PM2.59.74 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (3 stations within 25 km)
9.74
Median
11.7
Average
9.6
Low
13.5
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +1.1

What is the 7-day forecast for Clayton?

08-03
30.4° 20.9°
08-04
35.9° 19.3°
08-05
36.1° 16.1°
25.81 mm
08-06
40.2° 20.5°
3.5 mm
08-07
33.4° 21.2°
08-08
37.5° 25.9°
1.44 mm
08-09
35.3° 28.0°
Both models agree Avg diff: 3.4°C

Where are air quality stations near Clayton?

55
Ladue, Missouri, USA
2.5 km PM2.5: 14.0 µg/m³
9
Ladue, Missouri, USA
2.5 km PM2.5: 2.2 µg/m³
52
Forest Park, Missouri, USA
3.9 km PM2.5: 12.6 µg/m³
50
Blair Street, Missouri, USA
11.0 km PM2.5: 12.0 µg/m³
43
East St. Louis, Illinois, USA
14.6 km PM2.5: 10.3 µg/m³
41
Arnold West, Missouri, USA
22.5 km PM2.5: 9.8 µg/m³

What cities are near Clayton?

41 University City 43 Webster Groves 41 Overland 42 Creve Coeur 44 Kirkwood 47 Affton 53 St. Louis 44 Ferguson 40 Maryland Heights 49 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 2026-08-08T01:03 UTC.