What is the air quality in Chesterfield today?

The current Air Quality Index (AQI) in Chesterfield is 27 (Good). PM2.5 concentration is 6.5 µg/m³.

What is the temperature in Chesterfield right now?

The current temperature in Chesterfield is 27.2°C (feels like 31.0°C). Humidity is 65.5% and wind speed is 53.6 km/h.

Is it safe to go outside in Chesterfield?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 9.4 (Very High).

Air Quality in Chesterfield, United States

Windy

27.2°C · 65.5% humidity

27.2°

Feels 31.0°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

54 1pm

27 4pm

24 7pm

26 10pm

25 1am

24 4am

24 7am

25 10am

Air Quality Index Trend

42h · 6 stn

View full history →

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.

65.5%

Humidity

53.6 km/h

Wind NE

1011.7 hPa

Pressure

9.4

UV Very High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.5 µg/m³

PM10

20.55 µg/m³

050100150200300500

What is the weather forecast for Chesterfield?

Temperature & Precipitation

PM2.5 Trend

42h · 6 stations

PM2.56.5 µg/m³ ✓ WHO

Good

PM1020.55 µg/m³

Good

UV INDEX9.4

Very High

Station readings (1 station within 25 km)

6.5

Median

6.5

Average

6.5

Low

6.5

High

PM2.5 µg/m³ · Model: 7.35 · Bias: +0.9

What is the 7-day forecast for Chesterfield?

07-21

30.3° 23.3°

07-22

27.5° 20.7°

07-23

20.2° 19.2°

0.88 mm

07-24

28.9° 17.7°

0.75 mm

07-25

27.0° 19.6°

3.88 mm

07-26

32.6° 24.0°

1.06 mm

07-27

28.3° 21.5°

Both models agree Avg diff: 3.5°C

Where are air quality stations near Chesterfield?

Arnold West, Missouri, USA

28.5 km PM2.5: 15.0 µg/m³

Arnold West, Missouri, USA

28.5 km PM2.5: 5.5 µg/m³

What cities are near Chesterfield?

35 Ballwin 35 Manchester 43 Wildwood 32 Creve Coeur 33 Maryland Heights 28 Saint Charles 47 Saint Peters 36 Kirkwood 32 Overland 47 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 2026-07-21T21:45 UTC.