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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

Modelled US AQI · 8 cities · CAMS via Open-Meteo

72.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-0.8 AQI compared with the previous week’s mean of 73.7.

Highest hourly estimate: 263 in Bangkok · .

1344 of 1344 city-hours have a modelled AQI. These are estimates for roughly 45 km model grid cells, not monitoring-station measurements. How this report is made

Daily modelled US AQI

5010087Wed95Thu77Fri65Sat65Sun63Mon59Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 14 Feb87.2Moderate54–26328.1192 / 192
Thu, 15 Feb94.6Moderate50–25625.7192 / 192
Fri, 16 Feb77.2Moderate50–18116.8192 / 192
Sat, 17 Feb64.9Moderate51–9516.3192 / 192
Sun, 18 Feb64.5Moderate50–12016192 / 192
Mon, 19 Feb62.8Moderate51–10514.5192 / 192
Tue, 20 Feb58.8Moderate48–8713.1192 / 192

Hourly means (UTC+7)

Each cell averages the selected cities’ modelled AQI for that hour.

Day01234567891011121314151617181920212223
Wed8080797877757374757576767778828591103111114114111108104
Thu1019793918986848384848384848692971081171191161091029488
Fri827979797878777776767675757474737380868682787368
Sat656565646464646465656565666665656565686865646464
Sun646464646464646464646465656464666869686564636363
Mon636363636363636363636363636262626667646161616161
Tue606060606060606059595959585858585859585858585858

Cities by modelled US AQI

Sorted by weekly mean. Each city is a single model grid cell near its centre.

CityMean AQIPeak AQIMean PM2.5 (µg/m³)Hours
Bangkok113.1Unhealthy for Sensitive Groups26335.7168 / 168
Pattaya85.8Moderate22320.4168 / 168
Khon Kaen73.8Moderate12020.1168 / 168
Chiang Mai71.3Moderate11218.9168 / 168
Nakhon Ratchasima68Moderate11216.7168 / 168
Chiang Rai64.1Moderate8515.8168 / 168
Hat Yai54.3Moderate5910.9168 / 168
Phuket52.7Moderate5910.6168 / 168

City-hours by category

Good: 31

Moderate: 1185

Unhealthy for Sensitive Groups: 55

Unhealthy: 46

Very Unhealthy: 27

Hazardous: 0

US AQI scale
AQICategory
0–50Good
51–100Moderate
101–150Unhealthy for Sensitive Groups
151–200Unhealthy
201–300Very Unhealthy
301+Hazardous

How this report is made

Open-Meteo provides hourly estimates from the Copernicus Atmosphere Monitoring Service (CAMS) global model at roughly 45 km resolution. We use the grid cell nearest each city’s centre. Nearby places may share a cell, and local pollution can differ.

The AQI is the provider’s modelled US AQI across pollutants, one value per city per hour. Weekly, daily and hourly means average those values across the selected cities. PM2.5 is a concentration in µg/m³. These figures use a different basis from the measured PM2.5-derived AQI in the Malaysia and Singapore reports.

Days and hours use UTC+7. The report includes past model hours only, never forecasts. The previous-week comparison appears only when at least 90% of that week’s city-hours are available.

For official local readings and advice, visit Pollution Control Department · Air4Thai. Air-quality data: Open-Meteo and CAMS, licensed under CC BY 4.0. Haze Monitor is independent of these providers and local authorities.