Air Quality in Leiden, Netherlands

Windy
16.2°C · 73.5% humidity
16.2°
Feels 16.2°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
12 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
4 8pm
4
4
25 11pm
26
22
19 2am
17
15
14 5am
13
12
12 8am
12
12
11 11am
11
11
11 2pm
11
11
11 5pm
4
4
Station readings
1
0
26
CAMS model adj -23
27
27
27
27
34
34
34
34
34
34
34
34
34
34
34
34
34
34
34
34
34
34
27
27
AD 728×90

Air Quality Index Trend

47h · 8 stn

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.

73.5%
Humidity
59.2 km/h
Wind NNW
1014.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
5.99 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Leiden?

Temperature & Precipitation

PM2.5 Trend

47h · 8 stations
PM2.55.99 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (12 stations within 25 km)
5.99
Median
6.15
Average
0.16
Low
9.6
High
PM2.5 µg/m³ · Model: 6.25 · Bias: +0.3

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?

46
Willem de Zwijgerlaan, Leiden
1.4 km PM2.5: 11.0 µg/m³
–
netherlands-voorhout-linnaeuslaan
6.8 km 18.5°C 70.1% RH PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³
–
netherlands-laak-binckhorstlaan
14.8 km 19.6°C 69.9% RH PM2.5: 0.0 µg/m³ PM10: 0.1 µg/m³
–
Den Haag-Neherkade
16.0 km PM2.5: -1.0 µg/m³ PM10: 3.2 µg/m³
59
Rebecquestraat, Den Haag
16.6 km PM2.5: 15.9 µg/m³
–
netherlands-hof-van-scheveningen
17.4 km PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³
11
Oude Meije, Zegveld
23.7 km PM2.5: 2.6 µg/m³
17
PNH Hoofddorp
24.1 km PM2.5: 4.1 µg/m³
40
Oost Sidelinge A13, Rotterdam
24.8 km PM2.5: 9.6 µg/m³
18
Schipholweg, Haarlem
25.7 km PM2.5: 4.3 µg/m³

What cities are near Leiden?

25 Merenwijk 25 Leiderdorp 20 Oegstgeest 25 Voorschoten 25 Wassenaar 10 Sassenheim 17 Katwijk aan Zee 10 Noordwijk-Binnen 25 Benthuizen 27 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 2026-07-21T21:28 UTC.