Highest air pollution Yokohama, today and tomorrow
Today (29 June): Air quality in Yokohama is fair. PM2.5, O3, SO2, and PM1 are fair; AQI and NO2 are medium; PM10, CO, and HCHO are good. Pollution peaks around 9:00 PM (NO2: 40.9/100).
Tomorrow (30 June 2026): Air quality in Yokohama is fair. All pollutants stay as today. Pollution peaks around 8:00 PM (NO2: 41.4/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Yokohama's air quality benefits from its exceptional Tokyo Bay and Pacific Ocean coastal position, with consistent Pacific sea breezes and Tokyo Bay maritime influence providing reliable ventilation. Vehicle traffic on the Bayshore Route expressway and the surrounding Keihin industrial corridor and major container port contribute local sources, while the outstanding coastal exposure provides better conditions than the enclosed Tokyo metropolitan inland areas and summer photochemical ozone from the broader Kanto metropolitan corridor is the primary warm-season concern.
Today - 29 June | Pollution peaks at 21:00
AQI:
Medium
40.9/100
PM2.5 (fine particles):
Fair
26.7/100
PM10 (coarse particles):
Good
7.5/100
NO2 (nitrogen dioxide):
Medium
40.9/100
O3 (ozone):
Fair
21.6/100
SO2 (sulfur dioxide):
Fair
27.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.1/100
PM1 (ultrafine particles):
Fair
33.8/100
Levels show the poorest local air quality during the day
Tomorrow - 30 June | Pollution peaks at 20:00
AQI:
Medium
41.4/100
PM2.5 (fine particles):
Fair
29.6/100
PM10 (coarse particles):
Good
8.5/100
NO2 (nitrogen dioxide):
Medium
41.4/100
O3 (ozone):
Fair
30.6/100
SO2 (sulfur dioxide):
Fair
30.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.3/100
PM1 (ultrafine particles):
Fair
36.7/100
Pollen forecast in Yokohama
View pollen forecastFrequently Asked Questions
Is air quality bad in Yokohama right now?
On 29 June 2026, overall air quality in Yokohama is fair. PM1 is the main pollutant at 33.8/100. Pollution peaks around 9:00 PM (NO2: 40.9/100).
Will air quality be worse tomorrow in Yokohama?
On 30 June 2026, air quality conditions in Yokohama will be similar to today, with PM1 forecast at fair at 36.7/100. Pollution peaks around 8:00 PM (NO2: 41.4/100).
Are air quality levels in Yokohama based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 28 June 2026 at 18:35 CET (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team