7 – 13 Oct 2026 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

62.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 12.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+5 AQI compared with the previous week’s mean of 57.4.

Highest hourly estimate: 246 in Bangkok · 8 Oct, 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, 7 Oct	54.4Moderate	20–213	11.8	192 / 192
Thu, 8 Oct	69.6Moderate	26–246	15.3	192 / 192
Fri, 9 Oct	71.4Moderate	28–221	14.4	192 / 192
Sat, 10 Oct	61.8Moderate	34–141	12.2	192 / 192
Sun, 11 Oct	51.7Moderate	26–91	9.3	192 / 192
Mon, 12 Oct	63.1Moderate	35–234	16.1	192 / 192
Tue, 13 Oct	65.1Moderate	30–184	10.2	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	47	46	45	44	43	43	43	42	43	43	44	44	45	50	53	58	69	79	81	79	74	68	63	59
Thu	54	52	52	52	53	54	55	56	56	56	57	57	61	64	67	75	87	98	103	101	97	92	88	82
Fri	72	72	70	69	68	66	66	64	63	61	60	60	60	63	66	72	86	95	97	93	84	77	69	60
Sat	59	59	59	59	59	59	58	58	58	58	58	58	59	60	63	66	68	72	73	70	67	65	63	60
Sun	57	54	52	51	51	50	50	49	49	48	48	49	49	50	51	52	55	58	59	58	55	52	49	48
Mon	48	47	48	47	48	48	48	49	50	51	52	53	54	63	66	69	79	89	95	93	86	82	79	73
Tue	67	63	63	63	63	63	62	63	62	61	61	60	60	59	63	68	76	84	85	79	71	62	55	51

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
Bangkok	113.6Unhealthy for Sensitive Groups	246	27.1	168 / 168
Chiang Mai	70.1Moderate	110	18.4	168 / 168
Pattaya	62.2Moderate	181	9.8	168 / 168
Khon Kaen	57.4Moderate	113	11	168 / 168
Hat Yai	57.3Moderate	100	12.7	168 / 168
Chiang Rai	46.7Good	73	8.6	168 / 168
Phuket	46.5Good	141	6.2	168 / 168
Nakhon Ratchasima	45.6Good	78	8.3	168 / 168

City-hours by category

Good: 543

Moderate: 697

Unhealthy for Sensitive Groups: 60

Unhealthy: 24

Very Unhealthy: 20

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	47	46	45	44	43	43	43	42	43	43	44	44	45	50	53	58	69	79	81	79	74	68	63	59
Thu	54	52	52	52	53	54	55	56	56	56	57	57	61	64	67	75	87	98	103	101	97	92	88	82
Fri	72	72	70	69	68	66	66	64	63	61	60	60	60	63	66	72	86	95	97	93	84	77	69	60
Sat	59	59	59	59	59	59	58	58	58	58	58	58	59	60	63	66	68	72	73	70	67	65	63	60
Sun	57	54	52	51	51	50	50	49	49	48	48	49	49	50	51	52	55	58	59	58	55	52	49	48
Mon	48	47	48	47	48	48	48	49	50	51	52	53	54	63	66	69	79	89	95	93	86	82	79	73
Tue	67	63	63	63	63	63	62	63	62	61	61	60	60	59	63	68	76	84	85	79	71	62	55	51

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	47	46	45	44	43	43	43	42	43	43	44	44	45	50	53	58	69	79	81	79	74	68	63	59
Thu	54	52	52	52	53	54	55	56	56	56	57	57	61	64	67	75	87	98	103	101	97	92	88	82
Fri	72	72	70	69	68	66	66	64	63	61	60	60	60	63	66	72	86	95	97	93	84	77	69	60
Sat	59	59	59	59	59	59	58	58	58	58	58	58	59	60	63	66	68	72	73	70	67	65	63	60
Sun	57	54	52	51	51	50	50	49	49	48	48	49	49	50	51	52	55	58	59	58	55	52	49	48
Mon	48	47	48	47	48	48	48	49	50	51	52	53	54	63	66	69	79	89	95	93	86	82	79	73
Tue	67	63	63	63	63	63	62	63	62	61	61	60	60	59	63	68	76	84	85	79	71	62	55	51

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	47	46	45	44	43	43	43	42	43	43	44	44	45	50	53	58	69	79	81	79	74	68	63	59
Thu	54	52	52	52	53	54	55	56	56	56	57	57	61	64	67	75	87	98	103	101	97	92	88	82
Fri	72	72	70	69	68	66	66	64	63	61	60	60	60	63	66	72	86	95	97	93	84	77	69	60
Sat	59	59	59	59	59	59	58	58	58	58	58	58	59	60	63	66	68	72	73	70	67	65	63	60
Sun	57	54	52	51	51	50	50	49	49	48	48	49	49	50	51	52	55	58	59	58	55	52	49	48
Mon	48	47	48	47	48	48	48	49	50	51	52	53	54	63	66	69	79	89	95	93	86	82	79	73
Tue	67	63	63	63	63	63	62	63	62	61	61	60	60	59	63	68	76	84	85	79	71	62	55	51