Air Quality in Affton, United States

Windy
22.7°C · 49.2% humidity
22.7°
Feels 22.7°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast
25 6pm
25
27
36 9pm
33
32
30 12am
29
29
26 3am
26
26
25 6am
25
25
25 9am
25
25
25 12pm
25
25
25 3pm
25
25
AD 728×90

Air Quality Index Trend

46h · 4 stn

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

49.2%
Humidity
41.3 km/h
Wind NNW
1012.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

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

What is the weather forecast for Affton?

Temperature & Precipitation

PM2.5 Trend

46h · 4 stations
PM2.58.58 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (4 stations within 25 km)
8.58
Median
8.57
Average
6.2
Low
11.3
High
PM2.5 µg/m³ · Model: 6.15 · Bias: -2.4

What is the 7-day forecast for Affton?

06-09
32.3° 17.1°
6.38 mm
06-10
30.9° 22.6°
45.88 mm
06-11
29.5° 19.9°
06-12
32.2° 21.1°
0.75 mm
06-13
28.4° 23.9°
1.37 mm
06-14
33.4° 18.0°
12.19 mm
06-15
34.5° 25.7°
0.06 mm
Both models agree Avg diff: 3.9°C

Where are air quality stations near Affton?

38
Forest Park, Missouri, USA
10.0 km PM2.5: 9.1 µg/m³
36
Arnold West, Missouri, USA
12.7 km PM2.5: 8.6 µg/m³
34
Arnold West, Missouri, USA
12.7 km PM2.5: 8.2 µg/m³
41
East St. Louis, Illinois, USA
16.5 km PM2.5: 9.8 µg/m³

What cities are near Affton?

39 Concord 40 Mehlville 36 Lemay 32 Webster Groves 33 Kirkwood 42 Oakville 30 Clayton 32 University City 30 Creve Coeur 33 St. Louis
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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 2026-06-09T02:02 UTC.