What is the air quality trend in Helsinki?

Over the past 7 days, Helsinki had an average AQI of 27 based on station measurements. The worst day was with AQI .

How is Helsinki air quality measured?

Air quality in Helsinki is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Helsinki, Finland

Name: Helsinki Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Helsinki, Finland.

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

99h · 1 station

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	35	20–56	8.6 µg/m³	32.7	18h	1
2026-04-09	41	25–70	10.9 µg/m³	49.5	13h	1
2026-04-08	23	11–38	5.5 µg/m³	25.3	9h	1
2026-04-07	19	3–44	4.5 µg/m³	18.3	24h	1
2026-04-06	9	5–17	2.1 µg/m³	5.3	17h	1
2026-04-04	36	27–58	8.9 µg/m³	18.2	15h	1
2026-04-03	29	28–30	6.8 µg/m³	8.3	3h	1

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