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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

67.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+9.8 AQI compared with the previous week’s mean of 58.

Highest hourly estimate: 268 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

5010062Wed60Thu58Fri61Sat72Sun73Mon89Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 27 Dec62.3Moderate38–9914.7192 / 192
Thu, 28 Dec59.7Moderate37–11314.1192 / 192
Fri, 29 Dec58.2Moderate34–9914.3192 / 192
Sat, 30 Dec61.2Moderate32–13517.6192 / 192
Sun, 31 Dec71.7Moderate34–20920.5192 / 192
Mon, 1 Jan72.7Moderate29–20320.9192 / 192
Tue, 2 Jan88.8Moderate33–26828.3192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed656464646463636362626262626262626261636361606060
Thu606060606060605959595959585858585860646563605858
Fri585858585858585857575757575757575759636362615858
Sat585858585858585859585858585859596064697070696966
Sun656566676768686868686868686868686875848686858179
Mon777470696969696968696868686868686973818383828182
Tue828383848585858585858584838587899297100102101999590

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
Bangkok126.2Unhealthy for Sensitive Groups26852.2168 / 168
Pattaya98.6Moderate23528.2168 / 168
Chiang Mai76.5Moderate9021.9168 / 168
Chiang Rai56.3Moderate6411.9168 / 168
Hat Yai53Moderate6810.6168 / 168
Phuket48.8Good599.5168 / 168
Khon Kaen43Good587.8168 / 168
Nakhon Ratchasima39.9Good556.9168 / 168

City-hours by category

Good: 430

Moderate: 767

Unhealthy for Sensitive Groups: 50

Unhealthy: 67

Very Unhealthy: 30

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.