Air Quality in Hennef (Sieg), Germany
Partly Cloudy
13.8°C · 56.3% humidity
13.8°
Feels 13.8°
17
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Hennef (Sieg)'s air quality — share it
AQI Forecast
Calibrated
15
2pm
14
15
17
5pm
15
15
22
8pm
22
42
42
11pm
42
42
42
2am
42
42
42
5am
42
42
54
8am
54
42
22
11am
22
22
Station readings
8
14
15
CAMS model
adj -12
27
27
27
27
27
27
34
34
54
54
54
54
54
54
54
54
54
54
66
66
54
34
34
34
Air Quality Index Trend
46h · 2 stnHennef (Sieg)'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.
56.3%
Humidity
22.4 km/h
Wind NNE
1027.9 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Hennef (Sieg)?
Temperature & Precipitation
PM2.5 Trend
46h · 2 stationsPM2.54.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
Station readings (2 stations within 25 km)
4.1
Median
4.42
Average
3.33
Low
5.5
High
PM2.5 µg/m³ · Model: 6.25 · Bias: +2.2
What is the 7-day forecast for Hennef (Sieg)?
09-05
20.4° 10.7°
0.25 mm
09-06
20.5° 12.8°
2.0 mm
09-07
19.6° 11.6°
5.44 mm
09-08
22.0° 13.4°
5.56 mm
09-09
15.3° 9.7°
3.69 mm
09-10
22.4° 11.2°
09-11
20.1° 8.4°
1.81 mm
Both models agree
Avg diff: 2.6°C
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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 2026-09-05T15:53 UTC.