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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

66.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+5.6 AQI compared with the previous week’s mean of 61.1.

Highest hourly estimate: 182 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

5010068Wed62Thu66Fri66Sat69Sun68Mon68Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 28 Feb67.6Moderate45–10815.3192 / 192
Thu, 29 Feb61.6Moderate46–8115.7192 / 192
Fri, 1 Mar66.2Moderate53–16517.1192 / 192
Sat, 2 Mar65.8Moderate50–8617.4192 / 192
Sun, 3 Mar69.2Moderate53–18217.7192 / 192
Mon, 4 Mar67.9Moderate54–11118192 / 192
Tue, 5 Mar68.4Moderate57–9620.3192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed717070707070707070707069696868676665666563626262
Thu626161616161616161616161616262626262636262636363
Fri636363636363636363636363636363656974777675737066
Sat656565666566656565656665666666666666676867666666
Sun666666666666666666666666666666666973788080787672
Mon686767676767676868686869696868686970706967666767
Tue676767676767676767676768686868696970727171717171

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
Bangkok81.6Moderate18221.2168 / 168
Chiang Rai75Moderate8921.7168 / 168
Nakhon Ratchasima71.5Moderate8621168 / 168
Chiang Mai69.4Moderate8819.1168 / 168
Khon Kaen65.4Moderate11117.5168 / 168
Pattaya60.3Moderate7214.2168 / 168
Hat Yai55.8Moderate6112.3168 / 168
Phuket54.4Moderate6511.9168 / 168

City-hours by category

Good: 27

Moderate: 1297

Unhealthy for Sensitive Groups: 12

Unhealthy: 8

Very Unhealthy: 0

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.