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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

69.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 19.7 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-6 AQI compared with the previous week’s mean of 75.6.

Highest hourly estimate: 127 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

5010070Wed71Thu72Fri63Sat65Sun70Mon76Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 27 Mar70.2Moderate38–10921.4192 / 192
Thu, 28 Mar71.2Moderate43–11720.1192 / 192
Fri, 29 Mar71.8Moderate44–11418.5192 / 192
Sat, 30 Mar63.1Moderate43–9716192 / 192
Sun, 31 Mar65.3Moderate49–10017.9192 / 192
Mon, 1 Apr69.5Moderate37–12720.9192 / 192
Tue, 2 Apr75.9Moderate37–11223.1192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed676767666767676768686969707071727374767775747474
Thu737373737272727271717171707070707272737170697070
Fri717172727272737373737373737373727273737271706968
Sat676766656565646464636362626262616261616162626263
Sun636464646464646464656565666666666667676767676767
Mon676767676767676868686868686868697275777674727171
Tue727272737373747475757677777778787980817977777777

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
Chiang Rai92Moderate10831.4168 / 168
Khon Kaen87.1Moderate11728.3168 / 168
Chiang Mai82.6Moderate10026.4168 / 168
Nakhon Ratchasima73.3Moderate8721.6168 / 168
Bangkok66.3Moderate12717.3168 / 168
Pattaya56.7Moderate6712.7168 / 168
Hat Yai52Moderate6410.9168 / 168
Phuket46.4Good558.9168 / 168

City-hours by category

Good: 191

Moderate: 1077

Unhealthy for Sensitive Groups: 76

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.