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
1pm
37
37
37
4pm
37
37
37
7pm
37
37
37
10pm
37
50
50
1am
75
50
50
4am
50
37
37
7am
37
37
37
10am
37
50
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?
88
Branch Street, Missouri, USA
87
Branch Street, Missouri, USA
45
East St. Louis, Illinois, USA
28
Forest Park, Missouri, USA
38
Ladue, Missouri, USA
40
Arnold West, Missouri, USA
50
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 2026-04-09T16:58 UTC.