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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

77Weekly mean modelled AQI · Moderate

Mean PM2.5: 22.7 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+4.4 AQI compared with the previous week’s mean of 72.6.

Highest hourly estimate: 299 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

5010070Wed77Thu83Fri81Sat83Sun76Mon70Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 7 Dec69.7Moderate27–27218.9192 / 192
Thu, 8 Dec77.4Moderate36–28322.3192 / 192
Fri, 9 Dec82.8Moderate28–28430.2192 / 192
Sat, 10 Dec81.4Moderate36–29925.7192 / 192
Sun, 11 Dec82.7Moderate47–24325.4192 / 192
Mon, 12 Dec75.5Moderate50–19819.6192 / 192
Tue, 13 Dec69.8Moderate29–14516.8192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed595959606060616262626468717475788185868481787569
Thu686868696969707070697074757579859297999590858075
Fri7171727272737374757676778081839210010510610298938580
Sat807979787877777676767575757578818590959694918782
Sun767778787979797979797978787980899598989590858077
Mon777675757474737373737373747474747684868377757473
Tue727070696969686867666666676970737577797872676664

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
Bangkok181.4Unhealthy29977.4168 / 168
Chiang Mai90.6Moderate19426.9168 / 168
Pattaya69.9Moderate20315.2168 / 168
Chiang Rai64.7Moderate7016.5168 / 168
Khon Kaen60.5Moderate13114.3168 / 168
Nakhon Ratchasima58.2Moderate8713.8168 / 168
Hat Yai47Good649.5168 / 168
Phuket43.9Good718168 / 168

City-hours by category

Good: 286

Moderate: 867

Unhealthy for Sensitive Groups: 46

Unhealthy: 93

Very Unhealthy: 52

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.