Highest air pollution Chiang Mai, today and tomorrow
Today (29 June): Air quality in Chiang Mai is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (NO2: 27.4/100).
Tomorrow (30 June 2026): Air quality in Chiang Mai is fair. O3 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 24.9/100). 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
Chiang Mai's air quality faces Thailand's most severe seasonal air quality challenge, with the Ping River valley's near-complete enclosure between the Doi Inthanon and Doi Suthep mountain ranges trapping intense agricultural and forest burning smoke from February to April. Vehicle traffic on the Super Highway contributes year-round, while the burning season's PM2.5 regularly reaches among Southeast Asia's highest urban readings and the extraordinary valley topography makes Chiang Mai one of the world's most dramatically seasonal air quality environments throughout the year.
Today - 29 June | Pollution peaks at 21:00
AQI:
Fair
27.4/100
PM2.5 (fine particles):
Good
7.6/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Fair
27.4/100
O3 (ozone):
Good
19.2/100
SO2 (sulfur dioxide):
Good
5.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.4/100
PM1 (ultrafine particles):
Good
10.9/100
Levels show the poorest local air quality during the day
Tomorrow - 30 June | Pollution peaks at 00:00
AQI:
Fair
24.9/100
PM2.5 (fine particles):
Good
6.9/100
PM10 (coarse particles):
Good
1.9/100
NO2 (nitrogen dioxide):
Fair
24.9/100
O3 (ozone):
Fair
23.6/100
SO2 (sulfur dioxide):
Good
5.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.8/100
PM1 (ultrafine particles):
Good
9.8/100
Pollen forecast in Chiang Mai
View pollen forecastFrequently Asked Questions
Is air quality bad in Chiang Mai right now?
On 29 June 2026, overall air quality in Chiang Mai is fair. AQI is the main air quality indicator at 27.4/100. Pollution peaks around 9:00 PM (NO2: 27.4/100).
Will air quality be worse tomorrow in Chiang Mai?
On 30 June 2026, air quality conditions in Chiang Mai will be similar to today, with AQI forecast at fair at 24.9/100. Pollution peaks around 12:00 AM (NO2: 24.9/100).
Are air quality levels in Chiang Mai 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 18:37 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