Air Quality in Hennef (Sieg), Germany

Partly Cloudy
13.8°C · 56.3% humidity
13.8°
Feels 13.8°
35
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
15 4pm
21
13
35 7pm
36
32
49 10pm
47
46
45 1am
44
43
43 4am
43
43
42 7am
54
54
42 10am
22
22
22 1pm
22
15
Station readings
15
21
13
CAMS model adj -12
27
27
27
27
34
34
54
54
54
54
54
54
54
54
54
54
66
66
54
34
34
34
34
27
AD 728×90

Air Quality Index Trend

46h · 2 stn

Hennef (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
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
35
8.46 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Hennef (Sieg)?

Temperature & Precipitation

PM2.5 Trend

46h · 2 stations
PM2.58.46 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (2 stations within 25 km)
8.46
Median
10.03
Average
4.67
Low
15.4
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

Where are air quality stations near Hennef (Sieg)?

17
Bonn
18.1 km 22.9°C 39.0% RH PM2.5: 4.0 µg/m³ PM10: 6.0 µg/m³
30
Köln-Rodenkirchen, Germany
24.5 km PM2.5: 7.2 µg/m³
4
Hansaring
30.4 km PM2.5: 1.0 µg/m³ PM10: 1.0 µg/m³

What cities are near Hennef (Sieg)?

31 Siegburg 32 Sankt Augustin 34 Lohmar 34 Troisdorf 23 Eitorf 17 Königswinter 22 Bonn 36 Rösrath 15 Bad Honnef 23 Much
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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 2026-09-05T17:29 UTC.