Air Quality in Viana do Castelo, Portugal
Windy
16.7°C · 96.1% humidity
16.7°
Feels 16.7°
38
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Viana do Castelo's air quality — share it
AQI Forecast
54
5am
54
54
38
8am
43
46
28
11am
30
31
32
2pm
32
33
33
5pm
33
34
34
8pm
34
34
54
11pm
54
54
54
2am
54
54
Air Quality Index Trend
49h · 4 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.
96.1%
Humidity
60.7 km/h
Wind SE
1018.0 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.03 µg/m³
PM10
27.4 µg/m³
050100150200300500
What is the weather forecast for Viana do Castelo?
Temperature & Precipitation
PM2.5 Trend
49h · 4 stationsPM2.59.03 µg/m³
✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX1.4
Low
What is the 7-day forecast for Viana do Castelo?
07-22
18.8° 16.7°
0.06 mm
07-23
19.9° 17.9°
11.5 mm
07-24
18.3° 17.3°
07-25
18.4° 17.2°
0.19 mm
07-26
19.2° 16.4°
07-27
19.9° 17.5°
07-28
18.4° 17.8°
Both models agree
Avg diff: 3.2°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 2026-07-22T07:47 UTC.