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Alfena (Porto) (PT)

Air Quality Trend (last 7 days)

Good (0-50)
Moderate (51-100)
Unhealthy for Sensitive Groups (101-150)
Unhealthy (151-200)
Very Unhealthy (201-300)
Hazardous (300+)

Weather - 48h MET Norway

Rain
12°C
Rain
Humidity
97.7%
Wind
6 m/s
Pressure
993.9 hPa
Direction
239°
Sunrise
05:00
Sunset
17:00
24h Forecast:
Temp.
11° / 13°
Precip.
69.8mm
Max wind
12.3 m/s

Hourly Forecast

04.02
Now
Weather
12°
0.8
6
04.02
18:00
Weather
12°
0.1
6
04.02
19:00
Weather
12°
0.3
5
04.02
20:00
Weather
12°
0.2
7
04.02
21:00
Weather
12°
0.2
6
04.02
22:00
Weather
12°
0.5
6
04.02
23:00
Weather
12°
0.7
6
05.02
00:00
Weather
12°
0.5
7
05.02
01:00
Weather
13°
0.5
8
05.02
02:00
Weather
13°
3.4
8
05.02
03:00
Weather
13°
2.5
11
05.02
04:00
Weather
13°
6.6
11
05.02
05:00
Weather
13°
2
11
05.02
06:00
Weather
13°
3.5
10
05.02
07:00
Weather
12°
3
12
05.02
08:00
Weather
11°
1.9
9
05.02
09:00
Weather
12°
3.2
10
05.02
10:00
Weather
12°
6.9
11
05.02
11:00
Weather
12°
9.2
12
05.02
12:00
Weather
12°
3.8
12
05.02
13:00
Weather
13°
3.2
10
05.02
14:00
Weather
13°
4
10
05.02
15:00
Weather
12°
8.8
9
05.02
16:00
Weather
11°
4
10

Temperature

13°C
11°C
17:00
12°C
18:00
12°C
19:00
12°C
20:00
12°C
21:00
12°C
22:00
12°C
23:00
12°C
00:00
12°C
01:00
13°C
02:00
13°C
03:00
13°C
04:00
13°C
05:00
13°C
06:00
13°C
07:00
12°C
08:00
11°C
09:00
12°C
10:00
12°C
11:00
12°C
12:00
12°C
13:00
13°C
14:00
13°C
15:00
12°C
16:00
11°C
17:00 04:00 16:00

Precipitation

9.2mm
0mm
17:00
0.8mm
18:00
0.1mm
19:00
0.3mm
20:00
0.2mm
21:00
0.2mm
22:00
0.5mm
23:00
0.7mm
00:00
0.5mm
01:00
0.5mm
02:00
3.4mm
03:00
2.5mm
04:00
6.6mm
05:00
2mm
06:00
3.5mm
07:00
3mm
08:00
1.9mm
09:00
3.2mm
10:00
6.9mm
11:00
9.2mm
12:00
3.8mm
13:00
3.2mm
14:00
4mm
15:00
8.8mm
16:00
4mm
17:00 04:00 16:00

Wind

12.3m/s
0m/s
17:00
5.9 m/s
18:00
5.9 m/s
19:00
5.4 m/s
20:00
6.7 m/s
21:00
5.9 m/s
22:00
5.7 m/s
23:00
5.8 m/s
00:00
6.7 m/s
01:00
7.9 m/s
02:00
8.3 m/s
03:00
10.8 m/s
04:00
10.7 m/s
05:00
10.6 m/s
06:00
10.4 m/s
07:00
11.8 m/s
08:00
8.9 m/s
09:00
10.3 m/s
10:00
10.7 m/s
11:00
12.3 m/s
12:00
11.7 m/s
13:00
10.3 m/s
14:00
10.4 m/s
15:00
9 m/s
16:00
9.6 m/s
17:00 04:00 16:00

Radiation

0.097 uSv
12.5 km
12.1%

Measurement time: 2026-02-04 11:00

source: remap_europe

We display the worst measurements from all stations in the area. This approach provides a more cautious assessment of air quality, accounting for local pollution sources.

AQI
13.1 km
52
17.3%

Measurement time: 2026-02-04 16:00

Calculated from PM2.5/PM10

PM10
13.1 km
22 µg/m3
15.7%

Measurement time: 2026-02-04 16:00

source: Aqicn

O3
13.1 km
24.8 µg/m3
15.5%

Measurement time: 2026-02-04 16:00

source: Aqicn

PM2.5
13.1 km
13 µg/m3
15.5%

Measurement time: 2026-02-04 16:00

source: Aqicn

NO2
13.1 km
1.4 µg/m3
0.7%

Measurement time: 2026-02-04 16:00

source: Aqicn

About Air Quality in Alfena

Air quality in Alfena is monitored in real-time by sensors and measurement stations. On this page you'll find current data on major air pollutants including particulate matter PM2.5 and PM10, nitrogen dioxide (NO2), ozone (O3), and radiation levels.

Common Pollutants in Alfena

  • PM2.5 - fine particulate matter up to 2.5 micrometers, particularly harmful to health
  • PM10 - particulate matter up to 10 micrometers from traffic and industry
  • NO2 - nitrogen dioxide mainly emitted by vehicles
  • O3 - tropospheric ozone formed in photochemical reactions

When is Air Quality Best in Alfena?

Generally, the best air quality occurs:

  • Early morning (5:00-7:00 AM) before rush hour traffic
  • After rainfall which cleanses the atmosphere
  • During strong winds that disperse pollutants
  • In summer months when heating systems are less used

Tips for Runners in Alfena

If you're planning outdoor activities in Alfena, always check the current AQI value. When AQI exceeds 100, consider moving your workout indoors or shortening the distance. People with respiratory issues, children, and seniors should be especially cautious during elevated pollution levels. Choose routes away from busy streets and industrial areas.