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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

69.2Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+2.7 AQI compared with the previous week’s mean of 66.5.

Highest hourly estimate: 168 in Khon Kaen · .

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

5010068Wed66Thu72Fri70Sat69Sun70Mon70Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 23 Apr67.5Moderate31–15716.5192 / 192
Thu, 24 Apr65.9Moderate24–13218192 / 192
Fri, 25 Apr71.6Moderate24–14819.9192 / 192
Sat, 26 Apr70.1Moderate25–15118.7192 / 192
Sun, 27 Apr68.5Moderate22–14317.4192 / 192
Mon, 28 Apr70.1Moderate28–16819.5192 / 192
Tue, 29 Apr70.4Moderate32–14718.1192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed646464646464646464636363636366707681838175706563
Thu626262626262626262626162626263687681827974686463
Fri636464656566666767676868696971768288918881757070
Sat696969696969686868686868676767687378797875737067
Sun656564646464646464636363646465667483888782756765
Mon656464646464646464656566666767718188908782757068
Tue686868686768686767666666656565667482868581757169

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
Khon Kaen95.4Moderate16827.6168 / 168
Chiang Rai94.4Moderate13229.8168 / 168
Chiang Mai90.5Moderate14227.6168 / 168
Nakhon Ratchasima74.1Moderate11321.8168 / 168
Bangkok71.1Moderate15715.9168 / 168
Hat Yai52.1Moderate6811.1168 / 168
Pattaya43.7Good667.9168 / 168
Phuket31.9Good474.7168 / 168

City-hours by category

Good: 331

Moderate: 857

Unhealthy for Sensitive Groups: 149

Unhealthy: 7

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.