Air Quality in St. Louis, United States
Windy
20.7°C · 33.2% humidity
20.7°
Feels 20.7°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
AQI Forecast
37
2pm
37
37
37
5pm
37
37
37
8pm
37
37
37
11pm
50
50
75
2am
50
50
50
5am
37
37
37
8am
37
37
37
11am
50
25
33.2%
Humidity
88.0 km/h
Wind S
1020.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
What is the weather forecast for St. Louis?
Temperature & Precipitation
PM2.55.9 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for St. Louis?
04-09
20.7° 9.9°
04-10
22.5° 12.4°
04-11
20.6° 14.3°
20.63 mm
04-12
25.6° 16.9°
0.62 mm
04-13
28.6° 19.2°
0.31 mm
04-14
25.8° 21.0°
0.62 mm
04-15
17.4° 9.0°
4.5 mm
Both models agree
Avg diff: 3.3°C
Where are air quality stations near St. Louis?
118
Branch Street, Missouri, USA
40
East St. Louis, Illinois, USA
45
East St. Louis, Illinois, USA
27
Forest Park, Missouri, USA
21
Ladue, Missouri, USA
42
Arnold West, Missouri, USA
What cities are near St. Louis?
Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T17:38 UTC.