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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

65.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.4 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 74.9.

Highest hourly estimate: 134 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

5010065Wed60Thu61Fri65Sat69Sun66Mon70Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 24 Apr64.7Moderate35–9215.3192 / 192
Thu, 25 Apr60Moderate31–9416.2192 / 192
Fri, 26 Apr61.4Moderate25–10015.5192 / 192
Sat, 27 Apr64.5Moderate31–9719192 / 192
Sun, 28 Apr69.3Moderate37–10118.5192 / 192
Mon, 29 Apr66.2Moderate37–9317.2192 / 192
Tue, 30 Apr69.6Moderate37–13419.8192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed686867676767666666666666656564646464646262616160
Thu606060606059595959595959606060606161616161616161
Fri626262626262626161616161616161616263636261606060
Sat606161616161616162626363646565656667686869707273
Sun737271706970707070707069696968686869707069686767
Mon676767676767676666666666666666666666656566666665
Tue656566676868676664656565656566697376798079787777

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
Chiang Rai91.3Moderate10131.1168 / 168
Chiang Mai83.6Moderate9326.6168 / 168
Khon Kaen78.8Moderate10723.7168 / 168
Nakhon Ratchasima61.5Moderate10714.3168 / 168
Bangkok57Moderate13412.5168 / 168
Phuket55Moderate6011.8168 / 168
Hat Yai53.4Moderate6211.7168 / 168
Pattaya40.2Good587.3168 / 168

City-hours by category

Good: 204

Moderate: 1127

Unhealthy for Sensitive Groups: 13

Unhealthy: 0

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.