Toggle navigation
Places
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
English
Français
Deutsch
日本語
한국어
简体中文
繁體中文
Europe
Germany
North Rhine-Westphalia
Arnsberg
Siegen-Wittgenstein
Siegen
Kaan-Marienborn
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
Kaan-Marienborn
Siegen, Siegen-Wittgenstein
2026-01-21 04:00
CAQI (Europe)
Very Low
Pollutants
|
Pollens
PM2.5
μg/m³
8.5
PM10
μg/m³
10.3
Alder
0
Ragweed
0
Mugwort
0
Birch
0
Olive Tree
0
Grasses
0
Weather
℃
℃
℉
-1℃
81%
15 kph
0 of 11
Historical Data
Hourly
Hourly
Daily
CAQI (Europe)
CAQI (Europe)
Allergy Risk
PM2.5
PM10
Alder
Ragweed
Mugwort
Birch
Olive Tree
Grasses
Data Sources
https://www.eea.europa.eu
http://www.polleninfo.org
Get the App
Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.
iPhone, iPad
Android
Scan QR Code to Download App
iOS
Google Play
Download APK
Cities Nearby
Siegen
AQI 15
Netphen
AQI 22
Wilnsdorf
AQI 20
Mudersbach
AQI 20
Neunkirchen
AQI 20
Brachbach
AQI 20
Kreuztal
AQI 15
Niederfischbach
AQI 20
Herdorf
AQI 20
Freudenberg
AQI 20
Burbach
AQI 20
Air Matters © 2026