Worst air pollution Nikkō, today and tomorrow
Today (16 July): Air quality in Nikkō is fair. AQI, PM2.5, NO2, O3, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 37.6/100).
Tomorrow (17 July 2026): Air quality in Nikkō is fair. PM2.5 decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 37.8/100). 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
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Nikkō's air quality benefits from its exceptional Tochigi Prefecture Daiya River highland position at 543 metres in the Nikkō National Park, with consistent mountain highland breezes from the surrounding Nikkō volcanic highland providing clean natural ventilation. Vehicle traffic on surrounding roads and the extraordinary Tōshōgū shrine UNESCO heritage tourism corridor contribute seasonal local sources, while the outstanding highland park setting and the clean mountain forests generally maintain Nikko among Japan's more pleasantly ventilated highland heritage city environments throughout most of the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
37.6/100
PM2.5 (fine particles):
Fair
30.8/100
PM10 (coarse particles):
Good
8.7/100
NO2 (nitrogen dioxide):
Fair
28.7/100
O3 (ozone):
Fair
37.6/100
SO2 (sulfur dioxide):
Good
15.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.6/100
PM1 (ultrafine particles):
Fair
36.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
37.8/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Fair
25.0/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
14.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
15.0/100
PM1 (ultrafine particles):
Good
11.4/100
Frequently Asked Questions
Is air quality bad in Nikkō right now?
On 16 July 2026, overall air quality in Nikkō is fair. AQI is the main air quality indicator at 37.6/100. Pollution peaks around 1:00 PM (O3: 37.6/100).
Will air quality be worse tomorrow in Nikkō?
On 17 July 2026, air quality conditions in Nikkō will be similar to today, with AQI forecast at fair at 37.8/100. Pollution peaks around 2:00 PM (O3: 37.8/100).
When is air pollution at its worst in Nikkō?
The biggest local contributors to pollution in Nikkō are traffic emissions along with seasonal tourism traffic, particularly once weather conditions turn unfavourable. Local weather patterns add further variation on top of these sources. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Nikkō 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