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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

67.3Weekly 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.

-3 AQI compared with the previous week’s mean of 70.3.

Highest hourly estimate: 166 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

5010078Wed76Thu67Fri56Sat57Sun70Mon68Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 25 Dec77.7Moderate50–14321.7192 / 192
Thu, 26 Dec76.1Moderate53–12620.4192 / 192
Fri, 27 Dec66.7Moderate39–13912.8192 / 192
Sat, 28 Dec56.2Moderate29–1239.8192 / 192
Sun, 29 Dec57Moderate26–14515.3192 / 192
Mon, 30 Dec69.5Moderate35–16616.2192 / 192
Tue, 31 Dec67.9Moderate45–13516.5192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed777675757575757576757576757575757685909086827775
Thu747474747474747373737475767778798285858379767372
Fri727171717070696867676664646362616168727370666057
Sat575655545352515050494949505050515663697272696559
Sun555250494848484949495051525455566268747674726762
Mon616162626363636464646465656464667585929186807471
Tue696666656464646464646464646464657079848377716764

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
Bangkok90.6Moderate16625.1168 / 168
Chiang Mai89.1Moderate13527.5168 / 168
Khon Kaen70.4Moderate9718.2168 / 168
Pattaya64.1Moderate11112168 / 168
Chiang Rai63.6Moderate8015.9168 / 168
Nakhon Ratchasima60.6Moderate10312.3168 / 168
Phuket51.5Moderate1269.1168 / 168
Hat Yai48.6Good768.8168 / 168

City-hours by category

Good: 254

Moderate: 1017

Unhealthy for Sensitive Groups: 70

Unhealthy: 3

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.