5 – 11 Nov 2025 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

62.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 15.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+13 AQI compared with the previous week’s mean of 49.3.

Highest hourly estimate: 208 in Bangkok · 5 Nov, 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, 5 Nov	61.8Moderate	31–208	14.9	192 / 192
Thu, 6 Nov	67Moderate	26–164	18.3	192 / 192
Fri, 7 Nov	65.8Moderate	21–118	18.8	192 / 192
Sat, 8 Nov	61.1Moderate	29–101	11.8	192 / 192
Sun, 9 Nov	53.6Moderate	27–188	12.1	192 / 192
Mon, 10 Nov	59.7Moderate	32–183	13.7	192 / 192
Tue, 11 Nov	67.1Moderate	33–207	19.2	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	55	53	53	54	54	54	54	55	55	55	56	56	56	57	57	59	65	73	77	78	80	80	77	73
Thu	66	65	64	63	63	63	64	64	64	65	65	65	65	65	65	65	66	70	74	75	76	75	72	71
Fri	70	69	68	67	64	64	63	63	63	63	64	64	65	66	66	66	67	67	68	68	68	67	66	66
Sat	66	66	66	65	65	65	65	65	64	64	63	63	62	62	61	60	59	58	58	57	56	54	54	52
Sun	51	51	50	50	49	49	49	48	49	48	48	48	48	49	50	52	58	63	65	66	65	63	61	57
Mon	54	55	55	56	56	56	57	57	57	57	57	57	57	57	57	58	62	67	70	71	70	68	64	59
Tue	57	57	57	56	56	57	58	58	60	61	62	63	64	65	65	69	77	83	86	86	84	82	77	74

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	112.1Unhealthy for Sensitive Groups	208	33.5	168 / 168
Chiang Mai	72.9Moderate	99	21.2	168 / 168
Pattaya	68.2Moderate	126	15.3	168 / 168
Khon Kaen	58.9Moderate	71	14.3	168 / 168
Nakhon Ratchasima	53.7Moderate	68	11.7	168 / 168
Chiang Rai	49.5Good	68	11.1	168 / 168
Phuket	42.4Good	64	8.9	168 / 168
Hat Yai	40.9Good	62	8.4	168 / 168

City-hours by category

Good: 399

Moderate: 845

Unhealthy for Sensitive Groups: 72

Unhealthy: 21

Very Unhealthy: 7

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	55	53	53	54	54	54	54	55	55	55	56	56	56	57	57	59	65	73	77	78	80	80	77	73
Thu	66	65	64	63	63	63	64	64	64	65	65	65	65	65	65	65	66	70	74	75	76	75	72	71
Fri	70	69	68	67	64	64	63	63	63	63	64	64	65	66	66	66	67	67	68	68	68	67	66	66
Sat	66	66	66	65	65	65	65	65	64	64	63	63	62	62	61	60	59	58	58	57	56	54	54	52
Sun	51	51	50	50	49	49	49	48	49	48	48	48	48	49	50	52	58	63	65	66	65	63	61	57
Mon	54	55	55	56	56	56	57	57	57	57	57	57	57	57	57	58	62	67	70	71	70	68	64	59
Tue	57	57	57	56	56	57	58	58	60	61	62	63	64	65	65	69	77	83	86	86	84	82	77	74

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	55	53	53	54	54	54	54	55	55	55	56	56	56	57	57	59	65	73	77	78	80	80	77	73
Thu	66	65	64	63	63	63	64	64	64	65	65	65	65	65	65	65	66	70	74	75	76	75	72	71
Fri	70	69	68	67	64	64	63	63	63	63	64	64	65	66	66	66	67	67	68	68	68	67	66	66
Sat	66	66	66	65	65	65	65	65	64	64	63	63	62	62	61	60	59	58	58	57	56	54	54	52
Sun	51	51	50	50	49	49	49	48	49	48	48	48	48	49	50	52	58	63	65	66	65	63	61	57
Mon	54	55	55	56	56	56	57	57	57	57	57	57	57	57	57	58	62	67	70	71	70	68	64	59
Tue	57	57	57	56	56	57	58	58	60	61	62	63	64	65	65	69	77	83	86	86	84	82	77	74

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	55	53	53	54	54	54	54	55	55	55	56	56	56	57	57	59	65	73	77	78	80	80	77	73
Thu	66	65	64	63	63	63	64	64	64	65	65	65	65	65	65	65	66	70	74	75	76	75	72	71
Fri	70	69	68	67	64	64	63	63	63	63	64	64	65	66	66	66	67	67	68	68	68	67	66	66
Sat	66	66	66	65	65	65	65	65	64	64	63	63	62	62	61	60	59	58	58	57	56	54	54	52
Sun	51	51	50	50	49	49	49	48	49	48	48	48	48	49	50	52	58	63	65	66	65	63	61	57
Mon	54	55	55	56	56	56	57	57	57	57	57	57	57	57	57	58	62	67	70	71	70	68	64	59
Tue	57	57	57	56	56	57	58	58	60	61	62	63	64	65	65	69	77	83	86	86	84	82	77	74