Air Quality in Hennef (Sieg), Germany

Cloudy
10.5°C · 85.0% humidity
10.5°
Feels 10.5°
22
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
10 8pm
10
14
22 11pm
41
40
39 2am
11
9
9 5am
8
8
8 8am
10
10
17 11am
17
17
17 2pm
37
37
37 5pm
37
17
Station readings
8
8
14
12
CAMS model adj -17
27
27
34
34
54
54
54
27
25
25
25
25
25
27
27
34
34
34
34
54
54
54
54
34
AD 728×90

Air Quality Index Trend

47h · 1 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. Current PM2.5 concentration in Hennef (Sieg) is 1.0× the WHO annual guideline of 5 µg/m³.

85.0%
Humidity
8.9 km/h
Wind SSW
1023.5 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
22
5.16 µg/m³
PM10▲
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Hennef (Sieg)?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.55.16 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (2 stations within 25 km)
5.16
Median
4.75
Average
3.0
Low
6.5
High
PM2.5 µg/m³ · Model: 8.2 · Bias: +3.0

What is the 7-day forecast for Hennef (Sieg)?

05-28
22.4° 14.3°
5.63 mm
05-29
20.8° 10.5°
0.06 mm
05-30
15.9° 10.3°
6.56 mm
05-31
24.0° 8.2°
6.56 mm
06-01
26.2° 13.1°
06-02
26.6° 17.8°
6.69 mm
06-03
17.6° 12.9°
0.44 mm
Both models agree Avg diff: 4.7°C

Where are air quality stations near Hennef (Sieg)?

38
Bonn-Auerberg, Germany
14.3 km PM2.5: 9.1 µg/m³
35
Bonn-Auerberg, Germany
14.3 km PM2.5: 8.4 µg/m³
12
Bonn
18.1 km 21.9°C 40.0% RH PM2.5: 3.0 µg/m³ PM10: 5.0 µg/m³
19
Köln-Rodenkirchen, Germany
24.5 km PM2.5: 4.6 µg/m³
–
Hansaring
30.4 km PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

What cities are near Hennef (Sieg)?

23 Siegburg 23 Sankt Augustin 22 Lohmar 23 Troisdorf 18 Eitorf 19 Königswinter 24 Bonn 21 Rösrath 17 Bad Honnef 18 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 2026-05-28T21:37 UTC.