14 – 20 Aug 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

51.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 12 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-1.3 AQI compared with the previous week’s mean of 52.6.

Highest hourly estimate: 96 in Bangkok · 20 Aug, 19:00 GMT+7.

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

Day	Mean AQI	Low–high	Mean PM2.5 (µg/m³)	City-hours
Wed, 14 Aug	52.5Moderate	22–80	12.5	192 / 192
Thu, 15 Aug	52.8Moderate	20–90	11.7	192 / 192
Fri, 16 Aug	51.4Moderate	19–85	12.6	192 / 192
Sat, 17 Aug	52.4Moderate	25–84	11.3	192 / 192
Sun, 18 Aug	50.3Moderate	25–77	11.5	192 / 192
Mon, 19 Aug	49.9Good	23–86	11.3	192 / 192
Tue, 20 Aug	49.9Good	23–96	12.8	192 / 192

Hourly means (UTC+7)

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

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	51	51	51	51	51	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53
Thu	53	53	54	54	54	54	54	54	54	54	53	53	53	53	52	52	52	52	52	52	52	52	51	51
Fri	51	51	51	51	51	51	51	51	51	51	51	51	52	52	52	52	52	52	52	52	52	52	52	53
Sat	53	53	52	52	52	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Sun	51	51	50	50	50	50	49	49	49	49	49	49	49	50	50	50	51	52	52	52	52	51	51	51
Mon	51	51	51	51	51	51	51	51	51	51	50	51	50	50	50	50	49	49	49	49	49	48	48	48
Tue	48	48	48	48	48	48	48	48	49	49	49	49	49	50	50	50	50	51	53	54	54	52	52	52

Cities by modelled US AQI

Sorted by weekly mean. Each city is a single model grid cell near its centre.

City	Mean AQI	Peak AQI	Mean PM2.5 (µg/m³)	Hours
Nakhon Ratchasima	74Moderate	90	21.4	168 / 168
Khon Kaen	71.3Moderate	86	20.2	168 / 168
Bangkok	57.4Moderate	96	13.7	168 / 168
Chiang Mai	56.3Moderate	64	12.8	168 / 168
Chiang Rai	45.5Good	53	8.5	168 / 168
Hat Yai	45.1Good	55	8	168 / 168
Phuket	35Good	42	6.3	168 / 168
Pattaya	25.8Good	32	4.7	168 / 168

City-hours by category

Good: 579

Moderate: 765

Unhealthy for Sensitive Groups: 0

Unhealthy: 0

Very Unhealthy: 0

Hazardous: 0

US AQI scale
AQI	Category
0–50	Good
51–100	Moderate
101–150	Unhealthy for Sensitive Groups
151–200	Unhealthy
201–300	Very 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.

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	51	51	51	51	51	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53
Thu	53	53	54	54	54	54	54	54	54	54	53	53	53	53	52	52	52	52	52	52	52	52	51	51
Fri	51	51	51	51	51	51	51	51	51	51	51	51	52	52	52	52	52	52	52	52	52	52	52	53
Sat	53	53	52	52	52	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Sun	51	51	50	50	50	50	49	49	49	49	49	49	49	50	50	50	51	52	52	52	52	51	51	51
Mon	51	51	51	51	51	51	51	51	51	51	50	51	50	50	50	50	49	49	49	49	49	48	48	48
Tue	48	48	48	48	48	48	48	48	49	49	49	49	49	50	50	50	50	51	53	54	54	52	52	52

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	51	51	51	51	51	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53
Thu	53	53	54	54	54	54	54	54	54	54	53	53	53	53	52	52	52	52	52	52	52	52	51	51
Fri	51	51	51	51	51	51	51	51	51	51	51	51	52	52	52	52	52	52	52	52	52	52	52	53
Sat	53	53	52	52	52	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Sun	51	51	50	50	50	50	49	49	49	49	49	49	49	50	50	50	51	52	52	52	52	51	51	51
Mon	51	51	51	51	51	51	51	51	51	51	50	51	50	50	50	50	49	49	49	49	49	48	48	48
Tue	48	48	48	48	48	48	48	48	49	49	49	49	49	50	50	50	50	51	53	54	54	52	52	52

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	51	51	51	51	51	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53
Thu	53	53	54	54	54	54	54	54	54	54	53	53	53	53	52	52	52	52	52	52	52	52	51	51
Fri	51	51	51	51	51	51	51	51	51	51	51	51	52	52	52	52	52	52	52	52	52	52	52	53
Sat	53	53	52	52	52	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Sun	51	51	50	50	50	50	49	49	49	49	49	49	49	50	50	50	51	52	52	52	52	51	51	51
Mon	51	51	51	51	51	51	51	51	51	51	50	51	50	50	50	50	49	49	49	49	49	48	48	48
Tue	48	48	48	48	48	48	48	48	49	49	49	49	49	50	50	50	50	51	53	54	54	52	52	52