What is the air quality in Semnan?

Semnan, Iran has an annual US AQI of 87 (Polluted) and average PM2.5 of 28.5 µg/m³, ranking #4130 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Semnan?

October is typically the cleanest month (AQI 80) and March the most polluted (AQI 94).

PM2.5: 1998–2024 (satellite). From satellite data, because no government monitor covers the city. Full sources are on the methodology page.

Global rank	City	Continent	AQI	PM2.5
4130	Semnan, Iran	Africa & Middle East	AQI 87	PM2.5 28.5 µg/m³