Air Quality in Viana do Castelo, Portugal
Windy
15.6°C · 60.6% humidity
15.6°
Feels 15.6°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Viana do Castelo's air quality — share it
AQI Forecast
34
1pm
34
34
28
4pm
30
31
32
7pm
32
33
33
10pm
33
27
27
1am
34
27
27
4am
27
27
27
7am
27
27
27
10am
27
27
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.
60.6%
Humidity
65.4 km/h
Wind WNW
1018.0 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.8 µg/m³
PM10
27.4 µg/m³
050100150200300500
What is the weather forecast for Viana do Castelo?
Temperature & Precipitation
PM2.5 Trend
49h · 4 stationsPM2.56.8 µg/m³
✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX14.9
Extreme
What is the 7-day forecast for Viana do Castelo?
05-30
17.5° 15.5°
05-31
20.0° 15.5°
0.94 mm
06-01
19.1° 15.7°
06-02
15.6° 14.9°
2.06 mm
06-03
17.7° 15.5°
6.06 mm
06-04
16.4° 15.3°
06-05
18.7° 16.7°
0.94 mm
Both models agree
Avg diff: 1.9°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 2026-05-30T15:28 UTC.