Air Quality in Sintra, Portugal

Drizzle
17.8°C · 83.7% humidity
17.8°
Feels 17.8°
26
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
27 12pm
30
25
26 3pm
29
31
32 6pm
33
34
15 9pm
8
8
9 12am
9
9
9 3am
9
9
9 6am
9
9
16 9am
16
16
Station readings
27
30
25
24
CAMS model adj -18
54
54
54
54
54
54
54
54
54
34
27
27
27
27
27
27
27
27
27
27
27
34
34
34
AD 728×90

Air Quality Index Trend

48h · 2 stn

Sintra'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.

83.7%
Humidity
67.9 km/h
Wind S
1015.7 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
26
6.31 µg/m³
PM10▲
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Sintra?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations
PM2.56.31 µg/m³ ✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (3 stations within 25 km)
6.31
Median
6.41
Average
4.1
Low
8.83
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +7.2

What is the 7-day forecast for Sintra?

05-30
17.8° 15.9°
1.19 mm
05-31
17.8° 16.1°
0.56 mm
06-01
17.6° 16.3°
06-02
16.8° 15.6°
0.44 mm
06-03
17.4° 16.6°
1.5 mm
06-04
16.6° 15.8°
06-05
20.0° 16.9°
0.06 mm
Both models agree Avg diff: 2.1°C

Where are air quality stations near Sintra?

24
QSintra_Sensor1
0.9 km 26.0°C 51.0% RH PM2.5: 5.7 µg/m³ PM10: 6.5 µg/m³
43
Mem Martins, Sintra, Portugal
3.2 km PM2.5: 10.3 µg/m³
38
Mem Martins, Sintra, Portugal
3.2 km PM2.5: 9.1 µg/m³
33
Aldeia de Juzo
10.0 km 28.8°C 38.0% RH PM2.5: 7.9 µg/m³ PM10: 8.9 µg/m³
57
Entrecampos, Lisboa, Portugal
20.7 km PM2.5: 15.0 µg/m³
59
Olivais, Lisboa, Portugal
23.7 km PM2.5: 15.9 µg/m³
41
Olivais, Lisboa, Portugal
23.7 km PM2.5: 9.8 µg/m³
30
Laranjeiro, Almada, Portugal
24.5 km PM2.5: 7.2 µg/m³
51
Laranjeiro, Almada, Portugal
24.5 km PM2.5: 12.1 µg/m³

What cities are near Sintra?

27 Algueirão 27 Rio de Mouro 26 Cacém 34 Alcabideche 25 Massamá 24 Belas 34 Estoril 34 Monte Estoril 30 São Domingos de Rana 23 Olival
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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 2026-05-30T14:23 UTC.