Worst air pollution Himeji, today and tomorrow
Today (16 July): Air quality in Himeji is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 71.6/100).
Tomorrow (17 July 2026): Air quality in Himeji is very poor. AQI worsens to very poor; PM2.5 increases to fair; O3 increases to very poor; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 100/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Himeji's air quality reflects the Harima coastal plain's Hyogo Prefecture position on the Seto Inland Sea, with consistent Seto Inland Sea maritime breezes providing reliable ventilation. Vehicle traffic on surrounding expressways and the Nippon Steel Himeji, chemical, and castle tourism corridor contribute local sources, while the outstanding coastal exposure and the historic castle's elevated position create modest topographic variation and Himeji generally maintains moderate to good conditions for a major Japanese Seto Inland Sea industrial coastal city throughout most of the year.
Today - 16 July | Pollution peaks at 15:00
AQI:
Poor
71.6/100
PM2.5 (fine particles):
Good
10.3/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
10.8/100
O3 (ozone):
Poor
71.6/100
SO2 (sulfur dioxide):
Good
3.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.6/100
PM1 (ultrafine particles):
Good
12.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Fair
26.1/100
PM10 (coarse particles):
Good
7.6/100
NO2 (nitrogen dioxide):
Good
14.5/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Good
5.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.9/100
PM1 (ultrafine particles):
Fair
31.9/100
Frequently Asked Questions
Is air quality bad in Himeji right now?
On 16 July 2026, overall air quality in Himeji is poor. AQI is the main air quality indicator at 71.6/100. Pollution peaks around 3:00 PM (O3: 71.6/100).
Will air quality be worse tomorrow in Himeji?
On 17 July 2026, air quality conditions in Himeji will be worse than today, with AQI forecast at very poor at 100/100. Pollution peaks around 4:00 PM (O3: 100/100).
When is air pollution at its worst in Himeji?
In Himeji, road traffic, petrochemical and refining operations, and seasonal tourism traffic are the main local sources, with conditions worsening when dry spells bring strong winds. These wind events can carry dust in from the surrounding arid landscape. Onshore breezes usually help clear the air, but pollution can build up when winds are light.
Are air quality levels in Himeji 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: 16 July 2026 at 10:33 CEST (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