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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

80.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+15.2 AQI compared with the previous week’s mean of 65.1.

Highest hourly estimate: 139 in Khon Kaen · .

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

5010075Wed87Thu89Fri84Sat76Sun77Mon74Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 1 May75.3Moderate55–12524192 / 192
Thu, 2 May86.6Moderate57–12531192 / 192
Fri, 3 May89.3Moderate62–13527.1192 / 192
Sat, 4 May84Moderate56–13924192 / 192
Sun, 5 May76Moderate43–12822.2192 / 192
Mon, 6 May77.1Moderate50–12522.8192 / 192
Tue, 7 May73.9Moderate43–12621.5192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed777776767777767473737373747474747475757576777979
Thu808079808182828384858687888889909191929393939393
Fri939392929292929291919090908988888787878686858686
Sat868585848484848484848484848483838385878786848280
Sun797978787878787877767676757575747474757574747475
Mon757576767676767676777777777777777779818180797776
Tue767675757575747474747474737373737373737374747474

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
Khon Kaen105.8Unhealthy for Sensitive Groups13936.4168 / 168
Chiang Rai102.7Unhealthy for Sensitive Groups13636.8168 / 168
Chiang Mai85.6Moderate10028.7168 / 168
Nakhon Ratchasima79.7Moderate9824.4168 / 168
Bangkok76.9Moderate9122.3168 / 168
Phuket69.1Moderate8118.7168 / 168
Pattaya64.7Moderate7816.5168 / 168
Hat Yai58Moderate7013.2168 / 168

City-hours by category

Good: 24

Moderate: 1149

Unhealthy for Sensitive Groups: 171

Unhealthy: 0

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.