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Bangkokกรุงเทพมหานคร · 6 Nov, 20:00 GMT+766Modelled AQIChiang Maiเชียงใหม่ · 6 Nov, 20:00 GMT+779Modelled AQIChiang Raiเชียงราย · 6 Nov, 20:00 GMT+757Modelled AQIPhuketภูเก็ต · 6 Nov, 20:00 GMT+750Modelled AQIPattayaพัทยา · 6 Nov, 20:00 GMT+7115Modelled AQIHat Yaiหาดใหญ่ · 6 Nov, 20:00 GMT+735Modelled AQIKhon Kaenขอนแก่น · 6 Nov, 20:00 GMT+754Modelled AQINakhon Ratchasimaนครราชสีมา · Korat · 6 Nov, 20:00 GMT+749Modelled AQI

Chiang Mai: next 24 hours

Hourly model forecast · Asia/Bangkok local time. Forecasts can change as the model updates.

Forecast US AQI and PM2.5, not observed readings
Local timeModelled US AQIPM2.5 (µg/m³)
6832.1
6931.8
7028.4
7127.8
7226.8
7225.6
7314.1
736.4
725.4
727.2
718.2
716.3
694.7
684.4
674.2
664.1
654.5
645.4
635.9
626
616.9
608.4
599
588.1

Where these estimates come from

For Chiang Mai, we request the model grid cell near 18.7883, 98.9853. Open-Meteo provides the Copernicus Atmosphere Monitoring Service (CAMS) global model at roughly 45 km resolution. Nearby places may share a grid cell, and local pollution can differ.

The AQI is the provider’s modelled US AQI across pollutants. PM2.5 is a concentration in µg/m³. We do not convert a single hourly PM2.5 concentration into a daily AQI. These estimates use a different basis from the measured PM2.5-derived AQI on our Malaysia and Singapore pages.

“Valid for” is the time represented by the model, not the time a sensor took a measurement or a model run was issued. The app checks for new estimates every 15 minutes. Older estimates and saved responses are labelled; missing values remain unavailable.

For official local readings and activity advice, visit Pollution Control Department · Air4Thai. Thailand’s national index may use different breakpoints and averaging periods.

Air-quality data: Open-Meteo and CAMS, licensed under CC BY 4.0. Haze Monitor is independent of these providers and local authorities.

Thailand · Wat Phra Singh

Chiang Mai air quality

Modelled US Air Quality Index (AQI)

79

Modelled estimate · CAMS / Open-Meteo

Air qualityModerate
GoodHazardous

Modelled · All pollutants · About this estimate

Valid for 18 min ago
PM2.5 30 µg/m³Modelled concentration · roughly 45 km grid
CAMS via Open-Meteo ↗
About Chiang Mai air quality

These are model estimates, not measurements from a local monitoring station or the official national index. Each city represents a roughly 45 km model grid cell, not a country average. Local pollution can differ.

The Wat Phra Singh scene is an illustration, not a live camera view. Haze follows the modelled AQI and lighting follows the city’s local time.

Official local readings and advice ↗ · Sources and methodology

Next 24 hours

Model forecast

Chiang Mai · Local time

Low 58High 73US AQI
21:0020:00
6 Nov, 21:00 GMT+7Moderate68AQI

Forecasts can change. Missing hours remain unavailable.

Hourly AQI & PM2.5 details ↓

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