What is the air quality in Saint-Louis today?

The current Air Quality Index (AQI) in Saint-Louis is 36 (Good). PM2.5 concentration is 8.61 µg/m³.

What is the temperature in Saint-Louis right now?

The current temperature in Saint-Louis is 14.0°C (feels like 14.0°C). Humidity is 61.6% and wind speed is 18.3 km/h.

Is it safe to go outside in Saint-Louis?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Saint-Louis, France

Partly Cloudy

14.0°C · 61.6% humidity

14.0°

Feels 14.0°

Good

Air quality is satisfactory. Enjoy outdoor activities.

5 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings 5h ago

AQI 7

PM2.5 1.7 µg/m³ · 5h ago

Air Quality Index Trend

41h · 2 stn

View full history →

Saint-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.

61.6%

Humidity

18.3 km/h

Wind NW

1022.1 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.61 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Saint-Louis?

Temperature & Precipitation

PM2.5 Trend

41h · 2 stations

PM2.58.61 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (5 stations within 25 km)

8.61

Median

7.08

Average

3.6

Low

15.0

High

PM2.5 µg/m³ · Model: 6.5 · Bias: -2.1

What is the 7-day forecast for Saint-Louis?

10-21

14.0° 2.6°

10-22

18.4° 7.5°

3.81 mm

10-23

11.1° 5.7°

5.06 mm

10-24

8.8° 5.2°

10-25

17.0° 4.4°

10-26

9.6° 6.6°

0.13 mm

10-27

14.1° 5.3°

0.06 mm

Both models agree Avg diff: 3.7°C

Where are air quality stations near Saint-Louis?

Weil am Rhein, Germany

5.6 km PM2.5: 14.0 µg/m³

Basel Binningen, Switzerland

5.9 km PM2.5: 5.0 µg/m³

Basel Binningen, Switzerland

5.9 km PM2.5: 3.8 µg/m³

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switzerland-zwingen-reckholderstrasse

17.2 km 17.0°C 57.0% RH PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

–

Hauptstraße Schwörstadt

23.4 km 13.0°C 66.0% RH PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

Sud, Mulhouse, Alsace, France

24.7 km PM2.5: 1.7 µg/m³

Sud, Mulhouse, Alsace, France

24.7 km PM2.5: 6.5 µg/m³

Sud, Mulhouse, Alsace, France

24.7 km PM2.5: 3.6 µg/m³

Schwarzwald-Süd, Germany

28.7 km PM2.5: 4.8 µg/m³

What cities are near Saint-Louis?

24 Basel 56 Weil am Rhein 25 Allschwil 55 Riehen 52 Lörrach 29 Muttenz 25 Reinach 37 Rheinfelden 38 Schopfheim 49 Müllheim

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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 2026-10-21T10:53 UTC.