What is the air quality trend in Sierre?

Over the past 8 days, Sierre had an average AQI of 48 based on station measurements. The worst day was 2026-07-16 with AQI 57.

How is Sierre air quality measured?

Air quality in Sierre 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 Sierre, Switzerland

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

Historical PM2.5 and AQI trend from monitoring stations near Sierre, Switzerland.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

109h

PM2.5 Station

109h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	30	30–30	7.1 µg/m³	1h	2
2026-07-21	52	17–92	14.5 µg/m³	14h	2
2026-07-20	57	5–109	16.0 µg/m³	17h	1
2026-07-19	42	13–68	10.6 µg/m³	19h	2
2026-07-18	50	9–137	14.2 µg/m³	13h	2
2026-07-17	46	13–144	12.6 µg/m³	17h	1
2026-07-16	57	21–82	15.8 µg/m³	14h	1
2026-07-15	50	22–68	13.1 µg/m³	14h	2

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