What is the air quality in Leiden today?

The current Air Quality Index (AQI) in Leiden is 25 (Good). PM2.5 concentration is 6.03 µg/m³.

What is the temperature in Leiden right now?

The current temperature in Leiden is 19.1°C (feels like 19.1°C). Humidity is 51.8% and wind speed is 60.5 km/h.

Is it safe to go outside in Leiden?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Leiden, Netherlands

Windy

19.1°C · 51.8% humidity

19.1°

Feels 19.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

15 stations

Nearby Monitoring Stations

AQI Forecast Calibrated

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Station readings

CAMS model adj -25

Air Quality Index Trend

47h · 1 stn

View full history →

Leiden'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.

51.8%

Humidity

60.5 km/h

Wind WNW

1014.5 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.03 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Leiden?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station

PM2.56.03 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (15 stations within 25 km)

6.03

Median

6.83

Average

0.16

Low

11.5

High

PM2.5 µg/m³ · Model: 6.25 · Bias: +0.2

What is the 7-day forecast for Leiden?

07-21

19.9° 16.3°

0.56 mm

07-22

20.0° 16.2°

1.88 mm

07-23

17.5° 15.5°

1.94 mm

07-24

21.3° 16.9°

4.19 mm

07-25

23.1° 14.8°

0.06 mm

07-26

28.2° 16.5°

0.5 mm

07-27

21.5° 18.5°

0.56 mm

Both models agree Avg diff: 1.6°C

Where are air quality stations near Leiden?

Willem de Zwijgerlaan, Leiden

1.4 km PM2.5: 11.0 µg/m³

–

netherlands-voorhout-linnaeuslaan

6.8 km 18.7°C 74.2% RH PM2.5: 0.1 µg/m³ PM10: 0.1 µg/m³

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netherlands-laak-binckhorstlaan

14.8 km 20.7°C 66.5% RH PM2.5: 0.0 µg/m³ PM10: 1.1 µg/m³

Den Haag-Neherkade

16.0 km PM2.5: 1.7 µg/m³ PM10: -3.2 µg/m³

Rebecquestraat, Den Haag

16.6 km PM2.5: 13.1 µg/m³

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netherlands-hof-van-scheveningen

17.4 km PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

Oude Meije, Zegveld

23.7 km PM2.5: 8.2 µg/m³

PNH Hoofddorp

24.1 km PM2.5: 23.0 µg/m³

Oost Sidelinge A13, Rotterdam

24.8 km PM2.5: 15.9 µg/m³

Schipholweg, Haarlem

25.7 km PM2.5: 4.3 µg/m³

What cities are near Leiden?

25 Merenwijk 25 Leiderdorp 20 Oegstgeest 25 Voorschoten 24 Wassenaar 12 Sassenheim 19 Katwijk aan Zee 12 Noordwijk-Binnen 28 Benthuizen 29 Zoetermeer

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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 2026-07-21T20:44 UTC.