Air Quality in Sintra, Portugal

Windy
19.2°C · 79.9% humidity
19.2°
Feels 19.2°
63
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
67 1pm
59
48
63 4pm
59
56
54 7pm
52
51
50 10pm
29
29
29 1am
29
28
28 4am
28
28
28 7am
28
28
28 10am
28
28
Station readings
67
59
CAMS model adj -6
54
54
54
54
54
54
54
54
54
54
34
34
34
34
34
34
34
34
34
34
34
34
34
34
AD 728×90

Air Quality Index Trend

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

79.9%
Humidity
137.4 km/h
Wind N
1017.2 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
63
17.74 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Sintra?

Temperature & Precipitation

PM2.5 Trend

46h · 2 stations
PM2.517.74 µg/m³ ×1.2 WHO
Moderate
PM1027.4 µg/m³
Good
UV INDEX9.4
Very High
AD 300×250
Station readings (2 stations within 25 km)
17.74
Median
18.34
Average
17.73
Low
18.95
High
PM2.5 µg/m³ · Model: 10.85 · Bias: -6.9

What is the 7-day forecast for Sintra?

09-05
21.2° 19.2°
09-06
20.1° 19.2°
09-07
20.9° 19.1°
09-08
20.9° 19.2°
1.19 mm
09-09
23.6° 19.1°
0.06 mm
09-10
22.3° 19.9°
0.19 mm
09-11
20.0° 19.1°
0.06 mm
Both models agree Avg diff: 2.8°C

Where are air quality stations near Sintra?

59
QSintra_Sensor1
0.9 km 37.0°C 38.0% RH PM2.5: 15.8 µg/m³ PM10: 18.9 µg/m³
68
Aldeia de Juzo
10.0 km 36.1°C 35.0% RH PM2.5: 20.0 µg/m³ PM10: 22.1 µg/m³
19
Olivais, Lisboa, Portugal
23.7 km PM2.5: 4.6 µg/m³
35
Olivais, Lisboa, Portugal
23.7 km PM2.5: 8.4 µg/m³
27
Olivais, Lisboa, Portugal
23.7 km PM2.5: 6.5 µg/m³
24
Laranjeiro, Almada, Portugal
24.5 km PM2.5: 5.8 µg/m³

What cities are near Sintra?

63 Algueirão 63 Rio de Mouro 63 Cacém 65 Alcabideche 64 Massamá 64 Belas 65 Estoril 65 Monte Estoril 64 São Domingos de Rana 64 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 2026-09-05T15:06 UTC.