What is the air quality trend in Shiraoka?

Over the past 8 days, Shiraoka had an average AQI of 52 based on station measurements. The worst day was 2026-07-22 with AQI 63.

How is Shiraoka air quality measured?

Air quality in Shiraoka 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 Shiraoka, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Shiraoka, Japan.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 26 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	63	59–68	18.0 µg/m³	42.2	6h	69
2026-07-21	58	51–65	15.6 µg/m³	32.3	24h	50
2026-07-20	54	48–60	13.6 µg/m³	20.3	24h	65
2026-07-19	42	32–52	10.0 µg/m³	11.6	24h	70
2026-07-18	42	30–52	10.1 µg/m³	9.0	24h	72
2026-07-17	52	40–61	13.0 µg/m³	24.3	24h	70
2026-07-16	57	52–63	14.8 µg/m³	37.4	24h	69
2026-07-15	54	47–59	13.5 µg/m³	32.7	18h	72

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