12 – 18 Nov 2025 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

59.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 13.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-2.5 AQI compared with the previous week’s mean of 62.3.

Highest hourly estimate: 172 in Bangkok · 12 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, 12 Nov	72.2Moderate	51–172	18.8	192 / 192
Thu, 13 Nov	66.2Moderate	41–120	15.3	192 / 192
Fri, 14 Nov	58.9Moderate	30–148	11.5	192 / 192
Sat, 15 Nov	55.5Moderate	26–106	13.2	192 / 192
Sun, 16 Nov	61.6Moderate	39–129	14.6	192 / 192
Mon, 17 Nov	55.2Moderate	30–77	11.1	192 / 192
Tue, 18 Nov	49.2Good	24–77	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	70	70	71	71	71	71	71	71	70	70	70	70	69	69	69	69	72	79	82	80	78	77	74	71
Thu	69	69	69	68	68	68	67	67	67	66	66	65	65	65	64	64	64	68	70	70	66	63	62	61
Fri	61	60	60	59	59	59	58	58	58	58	57	57	57	56	56	56	60	66	69	67	62	57	53	52
Sat	52	52	52	51	51	51	51	51	52	52	53	53	54	55	56	57	60	65	67	64	60	58	58	58
Sun	58	58	58	58	58	58	59	59	59	60	60	61	61	61	62	63	67	71	72	70	66	61	61	60
Mon	60	60	59	58	58	57	57	56	56	55	55	55	54	54	53	53	54	55	55	54	53	52	52	52
Tue	52	51	51	51	50	50	49	49	48	48	48	48	48	48	48	48	49	50	51	51	49	49	48	47

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	88.7Moderate	172	24.2	168 / 168
Chiang Mai	79.1Moderate	114	23.9	168 / 168
Khon Kaen	57.5Moderate	75	12.3	168 / 168
Chiang Rai	52.5Moderate	65	10.9	168 / 168
Nakhon Ratchasima	51.5Moderate	64	10.2	168 / 168
Phuket	50.8Moderate	71	8.9	168 / 168
Pattaya	50Good	80	9.2	168 / 168
Hat Yai	48.6Good	75	8.5	168 / 168

City-hours by category

Good: 338

Moderate: 954

Unhealthy for Sensitive Groups: 47

Unhealthy: 5

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	70	70	71	71	71	71	71	71	70	70	70	70	69	69	69	69	72	79	82	80	78	77	74	71
Thu	69	69	69	68	68	68	67	67	67	66	66	65	65	65	64	64	64	68	70	70	66	63	62	61
Fri	61	60	60	59	59	59	58	58	58	58	57	57	57	56	56	56	60	66	69	67	62	57	53	52
Sat	52	52	52	51	51	51	51	51	52	52	53	53	54	55	56	57	60	65	67	64	60	58	58	58
Sun	58	58	58	58	58	58	59	59	59	60	60	61	61	61	62	63	67	71	72	70	66	61	61	60
Mon	60	60	59	58	58	57	57	56	56	55	55	55	54	54	53	53	54	55	55	54	53	52	52	52
Tue	52	51	51	51	50	50	49	49	48	48	48	48	48	48	48	48	49	50	51	51	49	49	48	47

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	70	70	71	71	71	71	71	71	70	70	70	70	69	69	69	69	72	79	82	80	78	77	74	71
Thu	69	69	69	68	68	68	67	67	67	66	66	65	65	65	64	64	64	68	70	70	66	63	62	61
Fri	61	60	60	59	59	59	58	58	58	58	57	57	57	56	56	56	60	66	69	67	62	57	53	52
Sat	52	52	52	51	51	51	51	51	52	52	53	53	54	55	56	57	60	65	67	64	60	58	58	58
Sun	58	58	58	58	58	58	59	59	59	60	60	61	61	61	62	63	67	71	72	70	66	61	61	60
Mon	60	60	59	58	58	57	57	56	56	55	55	55	54	54	53	53	54	55	55	54	53	52	52	52
Tue	52	51	51	51	50	50	49	49	48	48	48	48	48	48	48	48	49	50	51	51	49	49	48	47

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	70	70	71	71	71	71	71	71	70	70	70	70	69	69	69	69	72	79	82	80	78	77	74	71
Thu	69	69	69	68	68	68	67	67	67	66	66	65	65	65	64	64	64	68	70	70	66	63	62	61
Fri	61	60	60	59	59	59	58	58	58	58	57	57	57	56	56	56	60	66	69	67	62	57	53	52
Sat	52	52	52	51	51	51	51	51	52	52	53	53	54	55	56	57	60	65	67	64	60	58	58	58
Sun	58	58	58	58	58	58	59	59	59	60	60	61	61	61	62	63	67	71	72	70	66	61	61	60
Mon	60	60	59	58	58	57	57	56	56	55	55	55	54	54	53	53	54	55	55	54	53	52	52	52
Tue	52	51	51	51	50	50	49	49	48	48	48	48	48	48	48	48	49	50	51	51	49	49	48	47