Air Quality in Chesterfield, United States

Rain
19.1°C · 95.9% humidity
19.1°
Feels 19.1°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
54 9am
54
34
21 12pm
25
27
29 3pm
31
32
32 6pm
33
53
53 9pm
54
54
54 12am
54
34
34 3am
34
34
34 6am
54
27
AD 728×90

Air Quality Index Trend

45h · 6 stn

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

95.9%
Humidity
52.3 km/h
Wind NE
1018.9 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
21
5.0 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Chesterfield?

Temperature & Precipitation

PM2.5 Trend

45h · 6 stations
PM2.55.0 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
5.0
Median
5.0
Average
5.0
Low
5.0
High
PM2.5 µg/m³ · Model: 8.2 · Bias: +3.2

What is the 7-day forecast for Chesterfield?

09-05
27.6° 19.1°
3.81 mm
09-06
34.9° 17.3°
3.81 mm
09-07
29.4° 21.3°
0.81 mm
09-08
23.5° 19.4°
19.81 mm
09-09
28.3° 15.9°
2.81 mm
09-10
31.0° 17.9°
0.56 mm
09-11
38.9° 19.3°
0.06 mm
Both models agree Avg diff: 6.8°C

Where are air quality stations near Chesterfield?

21
Ladue, Missouri, USA
19.7 km PM2.5: 5.0 µg/m³
46
Arnold West, Missouri, USA
28.5 km PM2.5: 11.0 µg/m³
51
Arnold West, Missouri, USA
28.5 km PM2.5: 12.1 µg/m³
72
Arnold West, Missouri, USA
28.5 km PM2.5: 22.1 µg/m³
68
Arnold West, Missouri, USA
28.5 km PM2.5: 20.2 µg/m³
49
Arnold West, Missouri, USA
28.5 km PM2.5: 11.8 µg/m³

What cities are near Chesterfield?

32 Ballwin 31 Manchester 35 Wildwood 27 Creve Coeur 25 Maryland Heights 23 Saint Charles 33 Saint Peters 32 Kirkwood 27 Overland 33 O'Fallon
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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 2026-09-05T17:30 UTC.