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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

63.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 16.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+14.8 AQI compared with the previous week’s mean of 49.

Highest hourly estimate: 290 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

5010064Wed67Thu64Fri69Sat73Sun57Mon52Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 5 Oct64Moderate28–21618.1192 / 192
Thu, 6 Oct66.8Moderate28–15617192 / 192
Fri, 7 Oct63.5Moderate33–20216192 / 192
Sat, 8 Oct69.3Moderate30–26819.7192 / 192
Sun, 9 Oct73.3Moderate25–29021.2192 / 192
Mon, 10 Oct57.4Moderate25–16810.6192 / 192
Tue, 11 Oct52.4Moderate27–9715.3192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed565757585859606061616161616364657074757474737066
Thu666767676767676666666666676767676970696767666666
Fri656463636262626262616161616061646870717067646262
Sat626161616060606060606167727576778181797878777584
Sun746667686868696970707074757677828571727185817874
Mon696867666564626160595857575655545352525150494847
Tue474747484849505151515252535354545456575655575859

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
Bangkok146.3Unhealthy for Sensitive Groups29053.7168 / 168
Chiang Mai75Moderate11522.2168 / 168
Pattaya56.9Moderate17311.5168 / 168
Nakhon Ratchasima55.5Moderate6712.8168 / 168
Khon Kaen51.4Moderate6810.8168 / 168
Hat Yai49.7Good569.5168 / 168
Chiang Rai45.2Good578.7168 / 168
Phuket30.7Good365.3168 / 168

City-hours by category

Good: 485

Moderate: 715

Unhealthy for Sensitive Groups: 60

Unhealthy: 60

Very Unhealthy: 24

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.