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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

66.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+1 AQI compared with the previous week’s mean of 65.4.

Highest hourly estimate: 248 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

5010069Wed74Thu81Fri62Sat53Sun53Mon72Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 23 Oct69Moderate31–21215.5192 / 192
Thu, 24 Oct74Moderate29–23723.7192 / 192
Fri, 25 Oct81.4Moderate24–20619.4192 / 192
Sat, 26 Oct62.1Moderate22–12013.9192 / 192
Sun, 27 Oct53.1Moderate19–8010.9192 / 192
Mon, 28 Oct52.9Moderate21–19313.5192 / 192
Tue, 29 Oct72.4Moderate22–24823.5192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed807771717170706969696868676766656465686869696967
Thu656361626364656567676869707071717887919292939292
Fri908784848483828078757575747474757986909189878377
Sat716766656464646363636363626261616062615958575656
Sun555555555454545454545454545454545353525251515050
Mon504949495049494949494848484847484954606467676662
Tue605655565859606161626263636871768490949798979693

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
Bangkok125.2Unhealthy for Sensitive Groups24839.4168 / 168
Pattaya100.2Unhealthy for Sensitive Groups24427.1168 / 168
Chiang Mai66.3Moderate9917.7168 / 168
Khon Kaen63.2Moderate9916.8168 / 168
Chiang Rai53.6Moderate6411.7168 / 168
Nakhon Ratchasima53.3Moderate7112.1168 / 168
Phuket36.2Good547168 / 168
Hat Yai33.4Good535.9168 / 168

City-hours by category

Good: 469

Moderate: 716

Unhealthy for Sensitive Groups: 74

Unhealthy: 61

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.