Air Quality in Hennef (Sieg), Germany

Windy
22.9°C · 33.1% humidity
22.9°
Feels 22.9°
12
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
30 4pm
30
30
12 7pm
17
21
3 10pm
5
7
8 1am
8
9
9 4am
9
10
10 7am
10
10
10 10am
3
3
3 1pm
3
3
Station readings
12
12
12
CAMS model adj -24
54
54
54
54
54
54
34
34
34
34
34
34
34
34
34
34
34
34
34
27
27
27
27
27
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.

33.1%
Humidity
40.9 km/h
Wind NW
1013.6 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
12
3.0 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Hennef (Sieg)?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.53.0 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (1 station within 25 km)
3.0
Median
3.0
Average
3.0
Low
3.0
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +6.8

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

07-21
26.0° 14.4°
0.5 mm
07-22
26.6° 13.4°
0.06 mm
07-23
20.5° 18.2°
0.62 mm
07-24
24.8° 15.4°
1.31 mm
07-25
30.1° 10.9°
07-26
31.0° 11.8°
2.06 mm
07-27
29.9° 15.9°
0.06 mm
Both models agree Avg diff: 3.6°C

Where are air quality stations near Hennef (Sieg)?

46
Bonn-Auerberg, Germany
14.3 km PM2.5: 11.0 µg/m³
34
Bonn-Auerberg, Germany
14.3 km PM2.5: 8.2 µg/m³
12
Bonn
18.1 km 25.6°C 23.0% RH PM2.5: 3.0 µg/m³ PM10: 5.0 µg/m³
63
Köln-Rodenkirchen, Germany
24.5 km PM2.5: 17.8 µg/m³
–
Hansaring
30.4 km PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

What cities are near Hennef (Sieg)?

12 Siegburg 12 Sankt Augustin 12 Lohmar 12 Troisdorf 40 Eitorf 18 Königswinter 12 Bonn 12 Rösrath 24 Bad Honnef 40 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 2026-07-21T17:24 UTC.