Air Quality in Leiden, Netherlands

Windy
14.6°C · 53.5% humidity
14.6°
Feels 14.6°
63
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
11 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
87 6pm
87
71
63 9pm
68
92
95 12am
97
98
99 3am
80
81
81 6am
74
75
75 9am
82
82
82 12pm
82
102
102 3pm
82
82
Station readings
87
87
71
61
CAMS model adj +48
34
34
34
34
34
54
54
54
54
54
34
34
34
27
27
27
34
34
34
34
54
54
34
34
AD 728×90

Air Quality Index Trend

46h · 3 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. Current PM2.5 concentration in Leiden is 1.2× the WHO 24-hour guideline of 15 µg/m³.

53.5%
Humidity
85.4 km/h
Wind NNE
1022.8 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
63
17.6 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Leiden?

Temperature & Precipitation

PM2.5 Trend

46h · 3 stations
PM2.517.6 µg/m³ ×1.2 WHO
Moderate
PM1034.3 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (11 stations within 25 km)
17.6
Median
15.85
Average
7.7
Low
36.53
High
PM2.5 µg/m³ · Model: 10.85 · Bias: -6.8

What is the 7-day forecast for Leiden?

05-29
15.4° 13.8°
05-30
14.1° 13.0°
0.25 mm
05-31
21.1° 10.7°
0.81 mm
06-01
18.7° 11.5°
06-02
24.4° 14.1°
10.94 mm
06-03
15.0° 12.3°
3.19 mm
06-04
26.2° 20.5°
5.12 mm
Both models agree Avg diff: 3.8°C

Where are air quality stations near Leiden?

57
Willem de Zwijgerlaan, Leiden
1.4 km PM2.5: 15.0 µg/m³
64
netherlands-voorhout-linnaeuslaan
6.8 km 18.8°C 74.2% RH PM2.5: 18.1 µg/m³ PM10: 19.5 µg/m³
47
netherlands-laak-binckhorstlaan
14.8 km 20.0°C 67.8% RH PM2.5: 11.3 µg/m³ PM10: 12.5 µg/m³
53
Den Haag-Neherkade
16.0 km PM2.5: 13.1 µg/m³ PM10: 5.7 µg/m³
58
Rebecquestraat, Den Haag
16.6 km PM2.5: 15.4 µg/m³
57
netherlands-hof-van-scheveningen
17.4 km PM2.5: 15.1 µg/m³ PM10: 15.4 µg/m³
25
Oude Meije, Zegveld
23.7 km PM2.5: 6.0 µg/m³
61
PNH Hoofddorp
24.1 km PM2.5: 16.9 µg/m³
30
Oost Sidelinge A13, Rotterdam
24.8 km PM2.5: 7.2 µg/m³
42
Schipholweg, Haarlem
25.7 km PM2.5: 10.1 µg/m³

What cities are near Leiden?

65 Merenwijk 63 Leiderdorp 66 Oegstgeest 60 Voorschoten 62 Wassenaar 67 Sassenheim 64 Katwijk aan Zee 67 Noordwijk-Binnen 58 Benthuizen 57 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 2026-05-29T19:14 UTC.