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Bangkokกรุงเทพมหานคร · 30 Sept, 05:00 GMT+758Modelled AQIChiang Maiเชียงใหม่ · 30 Sept, 05:00 GMT+750Modelled AQIChiang Raiเชียงราย · 30 Sept, 05:00 GMT+735Modelled AQIPhuketภูเก็ต · 30 Sept, 05:00 GMT+752Modelled AQIPattayaพัทยา · 30 Sept, 05:00 GMT+763Modelled AQIHat Yaiหาดใหญ่ · 30 Sept, 05:00 GMT+766Modelled AQIKhon Kaenขอนแก่น · 30 Sept, 05:00 GMT+754Modelled AQINakhon Ratchasimaนครราชสีมา · Korat · 30 Sept, 05:00 GMT+748Modelled 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)
517.5
517.1
516.5
516.3
515.8
515.2
514.9
514.8
514.9
515.1
515.4
516
519.2
5111.3
5116.1
5120.3
5122.9
5223.8
5320.9
5319.8
5318.6
5315.1
5414
5413.9

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)

50

Modelled estimate · CAMS / Open-Meteo

Air qualityGood
GoodHazardous

Modelled · All pollutants · About this estimate

Valid for 46 min ago
PM2.5 7.8 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 51High 54US AQI
06:0005:00
30 Sept, 06:00 GMT+7Moderate51AQI

Forecasts can change. Missing hours remain unavailable.

Hourly AQI & PM2.5 details ↓

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