What is the air quality in Skien?

Skien, Norway has an annual US AQI of 45 (Reasonable) and average PM2.5 of 8.1 µg/m³, ranking #440 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Skien?

September is typically the cleanest month (AQI 35) and January the most polluted (AQI 58).

Where does Skien's air quality data come from?

PM2.5: 1998–2026 (monitors 2013–2026, satellite 1998–2014, 2017; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Skien, Norway — Air Quality & Clean City Guide 2026

Skien Air Quality Data

Global rank	City	Continent	AQI	PM2.5
440	Skien, Norway	Europe	AQI 45	PM2.5 8.1 µg/m³