Air Quality in Saint-Louis, SN
Windy
23.7°C · 33.0% humidity
23.7°
Feels 23.7°
163
Unhealthy
Everyone should reduce prolonged outdoor exertion.
Model forecast
Nearby Monitoring Stations
AQI Forecast
136
3am
136
136
136
6am
136
136
136
9am
156
156
156
12pm
178
178
178
3pm
156
156
136
6pm
136
99
99
9pm
75
75
75
12am
75
99
33.0%
Humidity
50.4 km/h
Wind NNE
1008.7 hPa
Pressure
29.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
What is the weather forecast for Saint-Louis?
Temperature & Precipitation
PM2.578.65 µg/m³
×5.2 WHO
Unhealthy
PM10129.9 µg/m³
Moderate
UV INDEX29.9
Extreme
What is the 7-day forecast for Saint-Louis?
04-10
33.6° 23.7°
04-11
28.5° 21.2°
04-12
31.7° 22.1°
04-13
28.3° 21.7°
04-14
22.4° 20.8°
04-15
22.2° 19.7°
04-16
21.8° 19.2°
Both models agree
Avg diff: 3.8°C
What cities are near Saint-Louis?
Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-10T06:16 UTC.