28 Aug – 3 Sep 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

47.4Weekly mean modelled AQI · Good

Mean PM2.5: 9.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-7.2 AQI compared with the previous week’s mean of 54.6.

Highest hourly estimate: 88 in Khon Kaen · 28 Aug, 14:00 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, 28 Aug	51.6Moderate	16–88	10.9	192 / 192
Thu, 29 Aug	44.4Good	15–82	8.2	192 / 192
Fri, 30 Aug	44.3Good	15–79	10.1	192 / 192
Sat, 31 Aug	49.6Good	15–74	10.6	192 / 192
Sun, 1 Sep	49.3Good	18–66	9.8	192 / 192
Mon, 2 Sep	46.4Good	18–74	9.6	192 / 192
Tue, 3 Sep	46.4Good	22–74	9.9	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	54	53	53	53	53	53	53	53	52	52	52	52	52	52	52	51	51	51	50	50	50	50	49	49
Thu	48	48	48	47	47	47	46	46	45	45	44	44	43	43	43	43	43	42	42	43	42	43	42	42
Fri	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	46	46	48	49	48	47	47	47
Sat	47	48	48	48	48	48	49	49	49	50	50	50	50	51	51	51	51	51	51	51	50	50	50	50
Sun	50	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	48
Mon	48	48	47	47	47	47	46	47	46	46	46	46	46	46	46	46	46	46	47	47	46	46	46	46
Tue	47	47	47	47	47	47	47	47	48	47	47	47	47	47	46	46	46	46	46	45	46	46	46	46

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
Khon Kaen	60.5Moderate	88	13.3	168 / 168
Chiang Mai	59.8Moderate	74	14.5	168 / 168
Nakhon Ratchasima	55.1Moderate	77	11.5	168 / 168
Bangkok	48.9Good	74	9.8	168 / 168
Chiang Rai	46.7Good	56	9	168 / 168
Hat Yai	44Good	79	9.7	168 / 168
Phuket	42Good	50	7.6	168 / 168
Pattaya	22.5Good	38	3.5	168 / 168

City-hours by category

Good: 704

Moderate: 640

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	54	53	53	53	53	53	53	53	52	52	52	52	52	52	52	51	51	51	50	50	50	50	49	49
Thu	48	48	48	47	47	47	46	46	45	45	44	44	43	43	43	43	43	42	42	43	42	43	42	42
Fri	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	46	46	48	49	48	47	47	47
Sat	47	48	48	48	48	48	49	49	49	50	50	50	50	51	51	51	51	51	51	51	50	50	50	50
Sun	50	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	48
Mon	48	48	47	47	47	47	46	47	46	46	46	46	46	46	46	46	46	46	47	47	46	46	46	46
Tue	47	47	47	47	47	47	47	47	48	47	47	47	47	47	46	46	46	46	46	45	46	46	46	46

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	54	53	53	53	53	53	53	53	52	52	52	52	52	52	52	51	51	51	50	50	50	50	49	49
Thu	48	48	48	47	47	47	46	46	45	45	44	44	43	43	43	43	43	42	42	43	42	43	42	42
Fri	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	46	46	48	49	48	47	47	47
Sat	47	48	48	48	48	48	49	49	49	50	50	50	50	51	51	51	51	51	51	51	50	50	50	50
Sun	50	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	48
Mon	48	48	47	47	47	47	46	47	46	46	46	46	46	46	46	46	46	46	47	47	46	46	46	46
Tue	47	47	47	47	47	47	47	47	48	47	47	47	47	47	46	46	46	46	46	45	46	46	46	46

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	54	53	53	53	53	53	53	53	52	52	52	52	52	52	52	51	51	51	50	50	50	50	49	49
Thu	48	48	48	47	47	47	46	46	45	45	44	44	43	43	43	43	43	42	42	43	42	43	42	42
Fri	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	46	46	48	49	48	47	47	47
Sat	47	48	48	48	48	48	49	49	49	50	50	50	50	51	51	51	51	51	51	51	50	50	50	50
Sun	50	50	50	50	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	48
Mon	48	48	47	47	47	47	46	47	46	46	46	46	46	46	46	46	46	46	47	47	46	46	46	46
Tue	47	47	47	47	47	47	47	47	48	47	47	47	47	47	46	46	46	46	46	45	46	46	46	46