11 – 17 Sep 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

48.3Weekly mean modelled AQI · Good

Mean PM2.5: 10.7 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+5.2 AQI compared with the previous week’s mean of 43.1.

Highest hourly estimate: 86 in Khon Kaen · 17 Sept, 18:00 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, 11 Sep	43.7Good	16–68	9.1	192 / 192
Thu, 12 Sep	47.8Good	21–65	11	192 / 192
Fri, 13 Sep	49.4Good	21–76	10.6	192 / 192
Sat, 14 Sep	46.8Good	16–74	9.1	192 / 192
Sun, 15 Sep	46.7Good	16–71	10.3	192 / 192
Mon, 16 Sep	50.1Moderate	19–69	12.4	192 / 192
Tue, 17 Sep	53.8Moderate	16–86	12.6	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	43	43	43	44	44	43	43	43	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44
Thu	44	45	45	45	46	46	47	47	47	47	48	48	48	48	48	49	49	49	50	50	50	50	50	51
Fri	51	51	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	48	49	49	49	49	49	49
Sat	49	49	49	49	48	48	48	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45
Sun	45	44	44	45	45	45	45	45	45	46	46	47	47	47	48	48	49	49	49	49	49	48	48	48
Mon	48	48	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	52	52	53	53	53	53
Tue	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	53	54	56	56	56	55	54	54	54

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	60.9Moderate	76	14.1	168 / 168
Khon Kaen	58.9Moderate	86	13.8	168 / 168
Bangkok	57.9Moderate	65	13.6	168 / 168
Chiang Mai	55Moderate	71	14.1	168 / 168
Phuket	48.7Good	53	9	168 / 168
Chiang Rai	46.6Good	63	10.4	168 / 168
Hat Yai	29.6Good	45	4.9	168 / 168
Pattaya	28.9Good	56	5.8	168 / 168

City-hours by category

Good: 539

Moderate: 805

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	43	43	43	44	44	43	43	43	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44
Thu	44	45	45	45	46	46	47	47	47	47	48	48	48	48	48	49	49	49	50	50	50	50	50	51
Fri	51	51	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	48	49	49	49	49	49	49
Sat	49	49	49	49	48	48	48	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45
Sun	45	44	44	45	45	45	45	45	45	46	46	47	47	47	48	48	49	49	49	49	49	48	48	48
Mon	48	48	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	52	52	53	53	53	53
Tue	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	53	54	56	56	56	55	54	54	54

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	43	43	43	44	44	43	43	43	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44
Thu	44	45	45	45	46	46	47	47	47	47	48	48	48	48	48	49	49	49	50	50	50	50	50	51
Fri	51	51	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	48	49	49	49	49	49	49
Sat	49	49	49	49	48	48	48	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45
Sun	45	44	44	45	45	45	45	45	45	46	46	47	47	47	48	48	49	49	49	49	49	48	48	48
Mon	48	48	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	52	52	53	53	53	53
Tue	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	53	54	56	56	56	55	54	54	54

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	43	43	43	44	44	43	43	43	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44	44
Thu	44	45	45	45	46	46	47	47	47	47	48	48	48	48	48	49	49	49	50	50	50	50	50	51
Fri	51	51	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	48	49	49	49	49	49	49
Sat	49	49	49	49	48	48	48	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45
Sun	45	44	44	45	45	45	45	45	45	46	46	47	47	47	48	48	49	49	49	49	49	48	48	48
Mon	48	48	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	52	52	53	53	53	53
Tue	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	53	54	56	56	56	55	54	54	54