What is the air quality in Guyancourt today?

The current Air Quality Index (AQI) in Guyancourt is 40 (Good). PM2.5 concentration is 9.51 µg/m³.

What is the temperature in Guyancourt right now?

The current temperature in Guyancourt is 16.3°C (feels like 16.3°C). Humidity is 34.6% and wind speed is 29.1 km/h.

Is it safe to go outside in Guyancourt?

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

Air Quality in Guyancourt, France

Clear

16.3°C · 34.6% humidity

16.3°

Feels 16.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

14 stations

Nearby Monitoring Stations

AQI Forecast

21 9am

40 12pm

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Station readings

Air Quality Index Trend

48h · 3 stn

View full history →

Guyancourt'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.

34.6%

Humidity

29.1 km/h

Wind WSW

1022.3 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

9.51 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Guyancourt?

Temperature & Precipitation

PM2.5 Trend

48h · 3 stations

PM2.59.51 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (14 stations within 25 km)

9.51

Median

9.09

Average

1.82

Low

37.5

High

PM2.5 µg/m³ · Model: 6.5 · Bias: -3.0

What is the 7-day forecast for Guyancourt?

10-21

16.3° 9.0°

0.44 mm

10-22

20.6° 10.2°

0.69 mm

10-23

15.3° 8.6°

8.75 mm

10-24

13.0° 9.2°

0.19 mm

10-25

18.2° 8.5°

0.25 mm

10-26

14.7° 10.3°

0.19 mm

10-27

17.2° 6.6°

0.31 mm

Both models agree Avg diff: 3.2°C

Where are air quality stations near Guyancourt?

rue de Gometz

11.0 km PM2.5: 1.0 µg/m³ PM10: 2.0 µg/m³

Paris Stade Lenglen, Paris

15.7 km PM2.5: 1.4 µg/m³

106

Paris Stade Lenglen, Paris

15.7 km PM2.5: 37.5 µg/m³

Paris Stade Lenglen, Paris

15.7 km PM2.5: 1.4 µg/m³

Place Victor Basch, Paris

19.5 km PM2.5: 13.1 µg/m³

Arcueil

19.5 km PM2.5: 1.2 µg/m³ PM10: 1.6 µg/m³

Avenue Des Champs Elysees, Paris

20.4 km PM2.5: 5.8 µg/m³

Avenue Des Champs Elysees, Paris

20.4 km PM2.5: 15.9 µg/m³

Avenue Des Champs Elysees, Paris

20.4 km PM2.5: 7.2 µg/m³

Rn20 Montlhery, Paris

20.5 km PM2.5: 20.7 µg/m³

What cities are near Guyancourt?

44 Saint-Cyr-l'École 42 Montigny-le-Bretonneux 42 Saint-Quentin-en-Yvelines 43 Trappes 48 Versailles 48 Le Chesnay 51 Viroflay 53 Les Clayes-sous-Bois 47 Élancourt 52 Vélizy-Villacoublay

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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 2026-10-21T10:49 UTC.