29 May – 4 Jun 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

52.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 11.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+3.5 AQI compared with the previous week’s mean of 49.4.

Highest hourly estimate: 88 in Nakhon Ratchasima · 29 May, 02:00 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, 29 May	60.3Moderate	40–88	13.9	192 / 192
Thu, 30 May	55.4Moderate	32–85	12	192 / 192
Fri, 31 May	53Moderate	32–77	12.2	192 / 192
Sat, 1 Jun	49.2Good	23–80	9	192 / 192
Sun, 2 Jun	43.4Good	26–60	9.9	192 / 192
Mon, 3 Jun	54.9Moderate	36–83	13	192 / 192
Tue, 4 Jun	54.5Moderate	39–81	11.4	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	59	59	60	60	60	61	61	61	61	61	61	61	61	61	61	60	61	60	60	60	60	60	60	60
Thu	59	59	59	58	58	57	56	56	55	55	55	55	55	54	54	54	54	54	54	54	54	54	54	54
Fri	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	52	52
Sat	52	52	52	51	51	51	51	51	51	50	50	50	50	50	49	48	48	48	48	47	46	46	45	44
Sun	44	43	43	43	43	42	42	42	42	42	41	42	42	42	42	42	43	44	44	45	46	47	48	49
Mon	49	50	51	52	53	53	54	55	55	55	56	56	56	56	56	56	56	57	57	57	57	57	57	57
Tue	57	56	56	56	55	55	55	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54

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
Nakhon Ratchasima	66.9Moderate	88	18.4	168 / 168
Khon Kaen	57.8Moderate	72	12.9	168 / 168
Chiang Mai	57.4Moderate	76	13.5	168 / 168
Chiang Rai	53.9Moderate	80	12.5	168 / 168
Hat Yai	49.3Good	68	9.1	168 / 168
Bangkok	49Good	62	10.3	168 / 168
Phuket	47.8Good	63	8.8	168 / 168
Pattaya	41.5Good	56	7.6	168 / 168

City-hours by category

Good: 550

Moderate: 794

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	59	59	60	60	60	61	61	61	61	61	61	61	61	61	61	60	61	60	60	60	60	60	60	60
Thu	59	59	59	58	58	57	56	56	55	55	55	55	55	54	54	54	54	54	54	54	54	54	54	54
Fri	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	52	52
Sat	52	52	52	51	51	51	51	51	51	50	50	50	50	50	49	48	48	48	48	47	46	46	45	44
Sun	44	43	43	43	43	42	42	42	42	42	41	42	42	42	42	42	43	44	44	45	46	47	48	49
Mon	49	50	51	52	53	53	54	55	55	55	56	56	56	56	56	56	56	57	57	57	57	57	57	57
Tue	57	56	56	56	55	55	55	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54

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	59	59	60	60	60	61	61	61	61	61	61	61	61	61	61	60	61	60	60	60	60	60	60	60
Thu	59	59	59	58	58	57	56	56	55	55	55	55	55	54	54	54	54	54	54	54	54	54	54	54
Fri	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	52	52
Sat	52	52	52	51	51	51	51	51	51	50	50	50	50	50	49	48	48	48	48	47	46	46	45	44
Sun	44	43	43	43	43	42	42	42	42	42	41	42	42	42	42	42	43	44	44	45	46	47	48	49
Mon	49	50	51	52	53	53	54	55	55	55	56	56	56	56	56	56	56	57	57	57	57	57	57	57
Tue	57	56	56	56	55	55	55	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54

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	59	59	60	60	60	61	61	61	61	61	61	61	61	61	61	60	61	60	60	60	60	60	60	60
Thu	59	59	59	58	58	57	56	56	55	55	55	55	55	54	54	54	54	54	54	54	54	54	54	54
Fri	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	53	52	52
Sat	52	52	52	51	51	51	51	51	51	50	50	50	50	50	49	48	48	48	48	47	46	46	45	44
Sun	44	43	43	43	43	42	42	42	42	42	41	42	42	42	42	42	43	44	44	45	46	47	48	49
Mon	49	50	51	52	53	53	54	55	55	55	56	56	56	56	56	56	56	57	57	57	57	57	57	57
Tue	57	56	56	56	55	55	55	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54