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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

63.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 16.1 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+0.7 AQI compared with the previous week’s mean of 62.6.

Highest hourly estimate: 179 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

5010063Wed57Thu64Fri66Sat66Sun64Mon64Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 14 May62.7Moderate24–10815.6192 / 192
Thu, 15 May57.1Moderate22–9114.1192 / 192
Fri, 16 May63.5Moderate26–9017.8192 / 192
Sat, 17 May66.3Moderate33–10115.4192 / 192
Sun, 18 May65.6Moderate24–17916.8192 / 192
Mon, 19 May63.6Moderate40–13214.9192 / 192
Tue, 20 May64.4Moderate29–9718.1192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed595960606061616262626262626262626467706967656462
Thu605958575756555555545455555556565961616160585857
Fri575858596060616161616262626364656769717169686767
Sat676666656564646564656565646465666974757370676562
Sun616059595959595959606060606161626978848582787469
Mon656464646363636363626262626262636668686766646261
Tue616161626363636364646464646565656669706968666665

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
Nakhon Ratchasima84.1Moderate11327.7168 / 168
Khon Kaen83.6Moderate13225.1168 / 168
Bangkok70.7Moderate17917.5168 / 168
Chiang Mai66.9Moderate10817.5168 / 168
Chiang Rai65.1Moderate8716.8168 / 168
Hat Yai55.3Moderate10110.4168 / 168
Pattaya43.9Good588.5168 / 168
Phuket37.1Good565.6168 / 168

City-hours by category

Good: 326

Moderate: 991

Unhealthy for Sensitive Groups: 22

Unhealthy: 5

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.