24 – 30 Jun 2026 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

42.1Weekly mean modelled AQI · Good

Mean PM2.5: 7.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-11 AQI compared with the previous week’s mean of 53.1.

Highest hourly estimate: 70 in Nakhon Ratchasima · 26 Jun, 21:00 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, 24 Jun	48.1Good	23–64	8.7	192 / 192
Thu, 25 Jun	43.3Good	23–58	8.4	192 / 192
Fri, 26 Jun	45.4Good	17–70	8.8	192 / 192
Sat, 27 Jun	41.5Good	19–59	7.8	192 / 192
Sun, 28 Jun	43.2Good	18–61	7.4	192 / 192
Mon, 29 Jun	34.4Good	16–55	6.2	192 / 192
Tue, 30 Jun	38.7Good	18–55	7.8	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	53	53	52	52	51	51	50	49	49	48	48	47	47	46	46	46	46	46	46	46	46	46	46	45
Thu	45	45	45	44	44	44	44	44	44	43	43	43	42	42	42	42	42	43	43	43	43	44	44	43
Fri	43	43	43	43	43	44	44	44	45	45	45	45	46	46	46	46	47	47	47	48	48	48	47	47
Sat	45	44	43	42	42	42	42	41	41	41	41	40	40	41	40	41	41	41	41	41	41	42	41	41
Sun	42	42	42	43	43	43	43	43	44	44	44	44	44	45	45	45	45	44	44	44	43	42	41	40
Mon	39	39	38	38	37	36	35	35	33	33	32	32	32	32	32	32	33	34	34	34	34	34	34	34
Tue	34	35	35	35	36	36	37	37	37	38	38	39	39	40	40	41	41	42	42	42	42	41	42	42

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
Chiang Rai	55Moderate	61	11.9	168 / 168
Khon Kaen	53.4Moderate	59	10.7	168 / 168
Nakhon Ratchasima	50.5Moderate	70	9.4	168 / 168
Chiang Mai	47.2Good	55	9	168 / 168
Bangkok	43.6Good	61	8	168 / 168
Hat Yai	35.2Good	54	6.1	168 / 168
Phuket	28.7Good	43	5.2	168 / 168
Pattaya	22.9Good	45	2.5	168 / 168

City-hours by category

Good: 773

Moderate: 571

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	53	53	52	52	51	51	50	49	49	48	48	47	47	46	46	46	46	46	46	46	46	46	46	45
Thu	45	45	45	44	44	44	44	44	44	43	43	43	42	42	42	42	42	43	43	43	43	44	44	43
Fri	43	43	43	43	43	44	44	44	45	45	45	45	46	46	46	46	47	47	47	48	48	48	47	47
Sat	45	44	43	42	42	42	42	41	41	41	41	40	40	41	40	41	41	41	41	41	41	42	41	41
Sun	42	42	42	43	43	43	43	43	44	44	44	44	44	45	45	45	45	44	44	44	43	42	41	40
Mon	39	39	38	38	37	36	35	35	33	33	32	32	32	32	32	32	33	34	34	34	34	34	34	34
Tue	34	35	35	35	36	36	37	37	37	38	38	39	39	40	40	41	41	42	42	42	42	41	42	42

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	53	53	52	52	51	51	50	49	49	48	48	47	47	46	46	46	46	46	46	46	46	46	46	45
Thu	45	45	45	44	44	44	44	44	44	43	43	43	42	42	42	42	42	43	43	43	43	44	44	43
Fri	43	43	43	43	43	44	44	44	45	45	45	45	46	46	46	46	47	47	47	48	48	48	47	47
Sat	45	44	43	42	42	42	42	41	41	41	41	40	40	41	40	41	41	41	41	41	41	42	41	41
Sun	42	42	42	43	43	43	43	43	44	44	44	44	44	45	45	45	45	44	44	44	43	42	41	40
Mon	39	39	38	38	37	36	35	35	33	33	32	32	32	32	32	32	33	34	34	34	34	34	34	34
Tue	34	35	35	35	36	36	37	37	37	38	38	39	39	40	40	41	41	42	42	42	42	41	42	42

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	53	53	52	52	51	51	50	49	49	48	48	47	47	46	46	46	46	46	46	46	46	46	46	45
Thu	45	45	45	44	44	44	44	44	44	43	43	43	42	42	42	42	42	43	43	43	43	44	44	43
Fri	43	43	43	43	43	44	44	44	45	45	45	45	46	46	46	46	47	47	47	48	48	48	47	47
Sat	45	44	43	42	42	42	42	41	41	41	41	40	40	41	40	41	41	41	41	41	41	42	41	41
Sun	42	42	42	43	43	43	43	43	44	44	44	44	44	45	45	45	45	44	44	44	43	42	41	40
Mon	39	39	38	38	37	36	35	35	33	33	32	32	32	32	32	32	33	34	34	34	34	34	34	34
Tue	34	35	35	35	36	36	37	37	37	38	38	39	39	40	40	41	41	42	42	42	42	41	42	42