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
AD 728×90
33.0%
Humidity
50.4 km/h
Wind NNE
1008.7 hPa
Pressure
29.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Temperature & Precipitation

PM2.578.65 µg/m³ ×5.2 WHO
Unhealthy
PM10129.9 µg/m³
Moderate
UV INDEX29.9
Extreme
AD 300×250
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°

Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-10T06:16 UTC.