4 – 10 Jun 2025 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

60Weekly mean modelled AQI · Moderate

Mean PM2.5: 15.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+4.1 AQI compared with the previous week’s mean of 55.9.

Highest hourly estimate: 110 in Khon Kaen · 5 Jun, 18:00 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, 4 Jun	60.8Moderate	19–85	20	192 / 192
Thu, 5 Jun	68.5Moderate	27–110	19	192 / 192
Fri, 6 Jun	67.3Moderate	27–92	20.3	192 / 192
Sat, 7 Jun	65.5Moderate	28–95	15.6	192 / 192
Sun, 8 Jun	54.3Moderate	22–87	12.6	192 / 192
Mon, 9 Jun	50.7Moderate	19–91	11	192 / 192
Tue, 10 Jun	52.9Moderate	29–78	13	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	52	52	53	54	54	55	56	56	57	59	60	61	62	63	64	65	65	66	67	68	67	68	69	69
Thu	69	70	70	71	71	71	72	72	71	70	70	69	68	68	67	67	67	67	68	67	66	65	65	65
Fri	65	65	65	65	65	66	66	66	67	67	68	68	68	68	68	68	68	69	69	68	69	69	69	69
Sat	69	69	69	69	69	69	69	69	68	67	67	66	66	65	65	64	63	64	64	63	61	60	60	59
Sun	58	58	57	56	56	55	54	53	53	53	53	53	53	53	53	53	54	54	54	55	54	54	54	54
Mon	53	52	51	51	51	50	50	49	49	49	49	49	49	50	50	51	51	53	53	53	51	52	51	51
Tue	51	51	51	51	51	51	52	52	52	52	52	52	53	53	53	53	54	55	55	55	55	55	56	56

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	79.9Moderate	110	24.6	168 / 168
Chiang Mai	74.5Moderate	92	21.7	168 / 168
Chiang Rai	73.6Moderate	92	21.8	168 / 168
Nakhon Ratchasima	72.4Moderate	91	20.8	168 / 168
Bangkok	66.2Moderate	84	17.7	168 / 168
Pattaya	39.3Good	54	7.5	168 / 168
Hat Yai	38Good	61	6.8	168 / 168
Phuket	36Good	51	6.6	168 / 168

City-hours by category

Good: 432

Moderate: 909

Unhealthy for Sensitive Groups: 3

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	52	52	53	54	54	55	56	56	57	59	60	61	62	63	64	65	65	66	67	68	67	68	69	69
Thu	69	70	70	71	71	71	72	72	71	70	70	69	68	68	67	67	67	67	68	67	66	65	65	65
Fri	65	65	65	65	65	66	66	66	67	67	68	68	68	68	68	68	68	69	69	68	69	69	69	69
Sat	69	69	69	69	69	69	69	69	68	67	67	66	66	65	65	64	63	64	64	63	61	60	60	59
Sun	58	58	57	56	56	55	54	53	53	53	53	53	53	53	53	53	54	54	54	55	54	54	54	54
Mon	53	52	51	51	51	50	50	49	49	49	49	49	49	50	50	51	51	53	53	53	51	52	51	51
Tue	51	51	51	51	51	51	52	52	52	52	52	52	53	53	53	53	54	55	55	55	55	55	56	56

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	52	52	53	54	54	55	56	56	57	59	60	61	62	63	64	65	65	66	67	68	67	68	69	69
Thu	69	70	70	71	71	71	72	72	71	70	70	69	68	68	67	67	67	67	68	67	66	65	65	65
Fri	65	65	65	65	65	66	66	66	67	67	68	68	68	68	68	68	68	69	69	68	69	69	69	69
Sat	69	69	69	69	69	69	69	69	68	67	67	66	66	65	65	64	63	64	64	63	61	60	60	59
Sun	58	58	57	56	56	55	54	53	53	53	53	53	53	53	53	53	54	54	54	55	54	54	54	54
Mon	53	52	51	51	51	50	50	49	49	49	49	49	49	50	50	51	51	53	53	53	51	52	51	51
Tue	51	51	51	51	51	51	52	52	52	52	52	52	53	53	53	53	54	55	55	55	55	55	56	56

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	52	52	53	54	54	55	56	56	57	59	60	61	62	63	64	65	65	66	67	68	67	68	69	69
Thu	69	70	70	71	71	71	72	72	71	70	70	69	68	68	67	67	67	67	68	67	66	65	65	65
Fri	65	65	65	65	65	66	66	66	67	67	68	68	68	68	68	68	68	69	69	68	69	69	69	69
Sat	69	69	69	69	69	69	69	69	68	67	67	66	66	65	65	64	63	64	64	63	61	60	60	59
Sun	58	58	57	56	56	55	54	53	53	53	53	53	53	53	53	53	54	54	54	55	54	54	54	54
Mon	53	52	51	51	51	50	50	49	49	49	49	49	49	50	50	51	51	53	53	53	51	52	51	51
Tue	51	51	51	51	51	51	52	52	52	52	52	52	53	53	53	53	54	55	55	55	55	55	56	56