What is the air quality in Affton today?

The current Air Quality Index (AQI) in Affton is 38 (Good). PM2.5 concentration is 9.0 µg/m³.

What is the temperature in Affton right now?

The current temperature in Affton is 14.9°C (feels like 14.9°C). Humidity is 82.1% and wind speed is 34.9 km/h.

Is it safe to go outside in Affton?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Affton, United States

Drizzle

14.9°C · 82.1% humidity

14.9°

Feels 14.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

3 stations

Nearby Monitoring Stations

AQI Forecast

— 1pm

—

— 4pm

—

— 7pm

—

— 10pm

—

— 1am

—

— 4am

—

— 7am

—

— 10am

—

Air Quality Index Trend

43h · 3 stn

View full history →

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.

82.1%

Humidity

34.9 km/h

Wind E

1020.1 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

9.0 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Affton?

Temperature & Precipitation

PM2.5 Trend

43h · 3 stations

PM2.59.0 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (3 stations within 25 km)

9.0

Median

8.8

Average

6.5

Low

10.3

High

PM2.5 µg/m³ · Model: 8.2 · Bias: -0.8

What is the 7-day forecast for Affton?

10-20

15.9° 4.7°

0.06 mm

10-21

24.8° 14.8°

5.62 mm

10-22

22.0° 11.2°

2.56 mm

10-23

13.9° 10.5°

9.31 mm

10-24

27.7° 13.9°

10-25

19.2° 4.6°

10-26

25.8° 6.3°

0.06 mm

Both models agree Avg diff: 4.4°C

Where are air quality stations near Affton?

Arnold West, Missouri, USA

12.7 km PM2.5: 10.1 µg/m³

East St. Louis, Illinois, USA

16.5 km PM2.5: 10.1 µg/m³

Branch Street, Missouri, USA

17.1 km PM2.5: 12.6 µg/m³

What cities are near Affton?

39 Concord 39 Mehlville 38 Lemay 36 Webster Groves 37 Kirkwood 39 Oakville 34 Clayton 34 University City 36 Creve Coeur 34 St. Louis

Get AQI alerts for Affton

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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 2026-10-20T21:04 UTC.