What is the air quality trend in Yokohama?

Over the past 14 days, Yokohama had an average AQI of 38 based on station measurements. The worst day was with AQI .

How is Yokohama air quality measured?

Air quality in Yokohama 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 Yokohama, Japan

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

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

Current AQI
Moderate

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

262h · 15 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-11	56	51–59	14.3 µg/m³	21.7	11h	21
2026-04-10	37	19–56	8.9 µg/m³	17.3	24h	19
2026-04-09	30	13–41	7.1 µg/m³	13.5	18h	18
2026-04-08	34	27–42	8.2 µg/m³	10.0	9h	17
2026-04-07	29	9–61	7.1 µg/m³	11.4	24h	17
2026-04-06	51	42–60	12.7 µg/m³	20.1	18h	20
2026-04-04	38	18–55	9.2 µg/m³	15.5	15h	19
2026-04-03	35	27–49	8.3 µg/m³	11.8	24h	19
2026-04-02	18	6–30	4.4 µg/m³	6.2	24h	15
2026-04-01	17	6–31	4.0 µg/m³	5.9	23h	14
2026-03-31	26	6–37	6.3 µg/m³	12.1	24h	17
2026-03-30	43	23–113	12.2 µg/m³	18.9	11h	17
2026-03-29	62	49–75	17.2 µg/m³	24.3	24h	19
2026-03-28	65	44–119	18.7 µg/m³	25.6	13h	9

Back to Yokohama Air Quality