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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

75.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 20.5 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 78.6.

Highest hourly estimate: 230 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

5010083Wed84Thu91Fri75Sat65Sun66Mon67Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 20 Mar82.5Moderate52–15821.9192 / 192
Thu, 21 Mar83.6Moderate55–23026.4192 / 192
Fri, 22 Mar90.8Moderate55–21525.5192 / 192
Sat, 23 Mar75.1Moderate51–14718.8192 / 192
Sun, 24 Mar64.5Moderate49–11315.8192 / 192
Mon, 25 Mar65.8Moderate52–12017.2192 / 192
Tue, 26 Mar66.6Moderate43–10218.3192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed868686868585858484848383828181808183858482777474
Thu7475757676767777777778787878798085941001021011009998
Fri969290909090919090898988888991939497989693888484
Sat828180797877757574747473737475767677767572707069
Sun696868676767666665656464646363636363636262636363
Mon636364646464646464646464646565656974757369666565
Tue666666666666666767666666666667666769696867666667

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
Bangkok98.6Moderate23030.1168 / 168
Khon Kaen83.7Moderate14724.8168 / 168
Chiang Rai82.2Moderate13923.7168 / 168
Chiang Mai79.3Moderate12421.8168 / 168
Nakhon Ratchasima77.1Moderate11022.2168 / 168
Pattaya74.2Moderate15119.1168 / 168
Hat Yai55Moderate5911.6168 / 168
Phuket54.5Moderate5811.1168 / 168

City-hours by category

Good: 40

Moderate: 1141

Unhealthy for Sensitive Groups: 128

Unhealthy: 23

Very Unhealthy: 12

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.