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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

78.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+24.3 AQI compared with the previous week’s mean of 54.2.

Highest hourly estimate: 234 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

5010067Wed68Thu66Fri75Sat85Sun94Mon94Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 26 Nov66.6Moderate39–15117.2192 / 192
Thu, 27 Nov68Moderate50–11416.8192 / 192
Fri, 28 Nov66.1Moderate39–12616.8192 / 192
Sat, 29 Nov75.4Moderate38–19917192 / 192
Sun, 30 Nov84.9Moderate37–21620.8192 / 192
Mon, 1 Dec94.3Moderate51–22721.5192 / 192
Tue, 2 Dec94Moderate51–23419.7192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed626363636464646464646565656565656873767675726867
Thu666666666666666768686869696969686771737471696766
Fri656565656464646464646464646464646772767571676564
Sat6464646465656565656464646465667287101108107102969081
Sun7572686565656565666667686870758911012613212912211210595
Mon93928986838076747474747474758194114131136133125118111103
Tue94908784828077757473737375768495113129135132125117109102

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
Bangkok117.5Unhealthy for Sensitive Groups23434.2168 / 168
Pattaya105.3Unhealthy for Sensitive Groups22121.3168 / 168
Chiang Mai82.8Moderate18123.1168 / 168
Nakhon Ratchasima69.9Moderate11016.1168 / 168
Phuket69.3Moderate12112.6168 / 168
Khon Kaen67.1Moderate10814.6168 / 168
Hat Yai62.5Moderate9915.3168 / 168
Chiang Rai53.5Moderate9811.2168 / 168

City-hours by category

Good: 97

Moderate: 1062

Unhealthy for Sensitive Groups: 101

Unhealthy: 47

Very Unhealthy: 37

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.