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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

76.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 20.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-10.3 AQI compared with the previous week’s mean of 86.8.

Highest hourly estimate: 232 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

5010081Wed72Thu67Fri69Sat74Sun84Mon88Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 21 Jan80.9Moderate59–19821192 / 192
Thu, 22 Jan71.8Moderate53–14417.8192 / 192
Fri, 23 Jan66.8Moderate39–11116.2192 / 192
Sat, 24 Jan69.2Moderate38–11218.8192 / 192
Sun, 25 Jan74.3Moderate50–16619.3192 / 192
Mon, 26 Jan84.4Moderate50–23225.2192 / 192
Tue, 27 Jan87.9Moderate52–16823.6192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed76767676767676767675757474747474839410010198938782
Thu797572727171717070707069706969697078828074696767
Fri676766666766676766666565646363636573787871666363
Sat636364646464646565666767676869707379848377747270
Sun706969696969707070707070707071717483909187837977
Mon767472707070707071727373747580879811011711611110410093
Tue9086838384848484848383828282818492101107107100948884

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
Bangkok116.8Unhealthy for Sensitive Groups23238.8168 / 168
Chiang Mai90Moderate15528.8168 / 168
Pattaya85.6Moderate20419.8168 / 168
Chiang Rai75.4Moderate11421168 / 168
Nakhon Ratchasima68.3Moderate10516.6168 / 168
Phuket60.2Moderate8712.5168 / 168
Khon Kaen59.8Moderate9512.9168 / 168
Hat Yai55.8Moderate6812168 / 168

City-hours by category

Good: 40

Moderate: 1150

Unhealthy for Sensitive Groups: 103

Unhealthy: 43

Very Unhealthy: 8

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.