Air Quality in Saint-Louis, France
Clear
23.6°C · 37.4% humidity
23.6°
Feels 23.6°
42
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Saint-Louis's air quality — share it
AQI Forecast
Calibrated
19
7pm
19
19
42
10pm
42
38
34
1am
52
30
29
4am
28
28
27
7am
27
27
19
10am
19
19
19
1pm
19
17
17
4pm
17
19
Station readings
42
CAMS model
adj -8
27
27
27
27
34
34
34
54
34
34
34
34
34
34
34
27
27
27
27
27
25
25
25
27
Air Quality Index Trend
35h · 2 stnSaint-Louis's air quality is shaped by traffic emissions and residential heating. Pollution levels tend to peak during winter months when cold air traps emissions close to ground level.
37.4%
Humidity
36.4 km/h
Wind NNE
1013.3 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
10.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Saint-Louis?
Temperature & Precipitation
PM2.5 Trend
35h · 2 stationsPM2.510.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (2 stations within 25 km)
10.1
Median
10.1
Average
10.1
Low
10.1
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -3.6
What is the 7-day forecast for Saint-Louis?
07-21
31.4° 13.2°
07-22
28.9° 16.5°
0.13 mm
07-23
23.3° 18.7°
0.44 mm
07-24
24.3° 15.0°
07-25
31.5° 12.0°
1.94 mm
07-26
35.3° 15.9°
0.5 mm
07-27
32.4° 16.3°
0.69 mm
Both models agree
Avg diff: 3.0°C
Where are air quality stations near Saint-Louis?
40
C.C. 3 Frontières, Alsace, France
14
Weil am Rhein, Germany
24
switzerland-zwingen-reckholderstrasse
–
Hauptstraße Schwörstadt
8
Schwarzwald-Süd, Germany
29
Schwarzwald-Süd, Germany
What cities are near Saint-Louis?
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T20:31 UTC.