What is the air quality in Hennef (Sieg) today?

The current Air Quality Index (AQI) in Hennef (Sieg) is 27 (Good). PM2.5 concentration is 6.42 µg/m³.

What is the temperature in Hennef (Sieg) right now?

The current temperature in Hennef (Sieg) is 3.6°C (feels like -2.2°C). Humidity is 87.3% and wind speed is 34.5 km/h.

Is it safe to go outside in Hennef (Sieg)?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Hennef (Sieg), Germany

Cloudy

3.6°C · 87.3% humidity

3.6°

Feels -2.2°

Good

Air quality is satisfactory. Enjoy outdoor activities.

2 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

47h · 2 stn

View full history →

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.

87.3%

Humidity

34.5 km/h

Wind SE

1018.1 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.42 µg/m³

PM10

27.4 µg/m³

050100150200300500

What is the weather forecast for Hennef (Sieg)?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations

PM2.56.42 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (2 stations within 25 km)

6.42

Median

5.08

Average

0.5

Low

9.67

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +7.1

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

10-21

16.1° 3.6°

0.06 mm

10-22

18.8° 6.2°

0.13 mm

10-23

9.2° 6.0°

1.13 mm

10-24

10.6° 5.0°

0.31 mm

10-25

15.3° 4.7°

10-26

11.5° 6.0°

3.81 mm

10-27

17.2° 4.9°

0.25 mm

Both models agree Avg diff: 3.3°C

Where are air quality stations near Hennef (Sieg)?

Bonn

18.1 km 11.3°C 74.0% RH PM2.5: 9.0 µg/m³ PM10: 12.0 µg/m³

Köln-Rodenkirchen, Germany

24.5 km PM2.5: 0.5 µg/m³

Hansaring

30.4 km PM2.5: 24.0 µg/m³ PM10: 27.6 µg/m³

What cities are near Hennef (Sieg)?

36 Siegburg 29 Sankt Augustin 36 Lohmar 43 Troisdorf 44 Eitorf 59 Königswinter 37 Bonn 40 Rösrath 72 Bad Honnef 39 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 2026-10-21T08:31 UTC.