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· Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

97.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 33.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+8.4 AQI compared with the previous week’s mean of 89.3.

Highest hourly estimate: 177 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

5010015096Wed98Thu95Fri96Sat102Sun101Mon97Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 1 Apr96.2Moderate40–17235.6192 / 192
Thu, 2 Apr97.6Moderate43–17535.7192 / 192
Fri, 3 Apr94.9Moderate43–17232192 / 192
Sat, 4 Apr95.6Moderate53–16833.9192 / 192
Sun, 5 Apr102.4Unhealthy for Sensitive Groups61–17736.1192 / 192
Mon, 6 Apr100.9Unhealthy for Sensitive Groups59–17732.2192 / 192
Tue, 7 Apr96.5Moderate51–16231.2192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed878888898989899090919191929394991071151181151091039895
Thu95959595959696969797979798979710010210610610299979696
Fri9594959494949494939292919191919295100103103101989595
Sat939291919191919192929393939494951001041071061041009999
Sun989899999999100100100999999999898102109114115114110106104101
Mon99989897979797979797979797979710210711211411310810510299
Tue969595959595949494949494949494951001031061051031009793

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 Rai166.4Unhealthy17577.7168 / 168
Chiang Mai158.4Unhealthy17167168 / 168
Khon Kaen104.5Unhealthy for Sensitive Groups15934.1168 / 168
Bangkok88.5Moderate17723.3168 / 168
Nakhon Ratchasima85.6Moderate10727168 / 168
Pattaya62.8Moderate8115.6168 / 168
Hat Yai59.9Moderate8713.9168 / 168
Phuket55.8Moderate9312168 / 168

City-hours by category

Good: 55

Moderate: 833

Unhealthy for Sensitive Groups: 134

Unhealthy: 322

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.