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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

122Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 42.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+24.6 AQI compared with the previous week’s mean of 97.4.

Highest hourly estimate: 279 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

50100150116Wed133Thu126Fri123Sat129Sun121Mon107Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 12 Apr116.2Unhealthy for Sensitive Groups68–24044.3192 / 192
Thu, 13 Apr132.9Unhealthy for Sensitive Groups66–27949.2192 / 192
Fri, 14 Apr126.3Unhealthy for Sensitive Groups60–27343.2192 / 192
Sat, 15 Apr123.1Unhealthy for Sensitive Groups69–24944.4192 / 192
Sun, 16 Apr128.6Unhealthy for Sensitive Groups79–24648.4192 / 192
Mon, 17 Apr120.7Unhealthy for Sensitive Groups80–18939.4192 / 192
Tue, 18 Apr106.5Unhealthy for Sensitive Groups67–18330.9192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed9795969797989898100100102105108113118125135144151153150144136129
Thu122119120121122124125126126127128128128129135139142147152153151148143137
Fri133127126125124124123122121121120119119118120124126133139141139133130126
Sat122117117117117117117116116116116116116116116123128136142143140134130127
Sun122121122123124124125126126126127127127127127128133135137138138137135133
Mon128126126126126125125125124123122121119118118117116117119120118115113111
Tue10910810710610510510410410210210110110010010210511011712212111611010397

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
Bangkok174.3Unhealthy27962.6168 / 168
Chiang Rai159.1Unhealthy19663.2168 / 168
Khon Kaen131.5Unhealthy for Sensitive Groups20743.4168 / 168
Pattaya129.5Unhealthy for Sensitive Groups16147.6168 / 168
Chiang Mai108.8Unhealthy for Sensitive Groups15937.1168 / 168
Nakhon Ratchasima105.6Unhealthy for Sensitive Groups14036.1168 / 168
Hat Yai85.7Moderate11727.3168 / 168
Phuket81.9Moderate9825.4168 / 168

City-hours by category

Good: 0

Moderate: 479

Unhealthy for Sensitive Groups: 519

Unhealthy: 298

Very Unhealthy: 48

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.