haze

· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

75Weekly mean modelled AQI · Moderate

Mean PM2.5: 21.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+17.7 AQI compared with the previous week’s mean of 57.3.

Highest hourly estimate: 300 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

5010067Wed75Thu75Fri77Sat74Sun75Mon82Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 9 Oct67Moderate32–15819.2192 / 192
Thu, 10 Oct75Moderate36–22521.1192 / 192
Fri, 11 Oct75Moderate32–23519.4192 / 192
Sat, 12 Oct77.1Moderate33–20722.5192 / 192
Sun, 13 Oct73.8Moderate33–17618.9192 / 192
Mon, 14 Oct74.9Moderate29–22521.1192 / 192
Tue, 15 Oct82.4Moderate29–30028.7192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed676666656565646464646464646565656772767473727069
Thu697069707070717171717171727273748089918984817974
Fri737372727272717170707070696970717785909188848074
Sat696869696970717172737374757577828895969488827776
Sun767675757474747373737373727170707077807978767268
Mon686868686969696968686868686868728187919292918884
Tue79747373737373737373747477838691981049189878710197

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
Bangkok159.4Unhealthy30062.6168 / 168
Pattaya90.4Moderate20325.7168 / 168
Chiang Mai85.2Moderate11926.2168 / 168
Khon Kaen64.4Moderate8016.2168 / 168
Chiang Rai60.6Moderate7214.6168 / 168
Nakhon Ratchasima56.3Moderate6712.4168 / 168
Hat Yai42.3Good517.6168 / 168
Phuket41.6Good637.2168 / 168

City-hours by category

Good: 323

Moderate: 786

Unhealthy for Sensitive Groups: 114

Unhealthy: 90

Very Unhealthy: 31

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.