Air Quality in Viana do Castelo, Portugal
Windy
18.9°C · 81.2% humidity
18.9°
Feels 18.9°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Viana do Castelo's air quality — share it
AQI Forecast
54
12am
54
54
36
3am
41
45
47
6am
49
51
52
9am
52
53
33
12pm
33
34
27
3pm
27
27
27
6pm
27
27
27
9pm
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.
81.2%
Humidity
182.0 km/h
Wind NNW
1017.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
8.59 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Viana do Castelo?
Temperature & Precipitation
PM2.5 Trend
45h · 5 stationsPM2.58.59 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Viana do Castelo?
08-03
20.8° 17.3°
1.56 mm
08-04
20.0° 18.5°
08-05
20.1° 18.4°
08-06
22.0° 17.3°
08-07
19.6° 17.9°
0.5 mm
08-08
19.9° 17.7°
08-09
19.9° 17.9°
Both models agree
Avg diff: 1.7°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 2026-08-08T02:37 UTC.