Air Quality in Viana do Castelo, Portugal
Windy
18.4°C · 83.4% humidity
18.4°
Feels 18.4°
37
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Viana do Castelo's air quality — share it
AQI Forecast
54
1pm
54
54
37
4pm
42
45
48
7pm
50
51
52
10pm
52
53
53
1am
53
54
54
4am
54
34
34
7am
34
34
34
10am
34
34
Air Quality Index Trend
45h · 5 stnViana do Castelo'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.
83.4%
Humidity
124.4 km/h
Wind NNW
1016.8 hPa
Pressure
7.9
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
8.81 µg/m³
PM10
34.3 µg/m³
050100150200300500
What is the weather forecast for Viana do Castelo?
Temperature & Precipitation
PM2.5 Trend
45h · 5 stationsPM2.58.81 µg/m³
✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX7.9
Very High
What is the 7-day forecast for Viana do Castelo?
09-05
19.6° 18.4°
09-06
19.3° 18.0°
09-07
18.6° 16.9°
09-08
18.9° 17.7°
4.5 mm
09-09
19.4° 17.4°
09-10
21.3° 18.2°
09-11
18.6° 18.2°
0.5 mm
Both models agree
Avg diff: 2.9°C
What cities are near Viana do Castelo?
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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 2026-09-05T15:10 UTC.