3 – 9 Jul 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

51.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 11.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+0.7 AQI compared with the previous week’s mean of 50.8.

Highest hourly estimate: 83 in Nakhon Ratchasima · 3 Jul, 15:00 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, 3 Jul	57.8Moderate	35–83	13.6	192 / 192
Thu, 4 Jul	56Moderate	39–79	11.5	192 / 192
Fri, 5 Jul	49.1Good	22–68	8.9	192 / 192
Sat, 6 Jul	46Good	17–68	10.9	192 / 192
Sun, 7 Jul	52.1Moderate	25–69	11.7	192 / 192
Mon, 8 Jul	48.1Good	29–69	9.4	192 / 192
Tue, 9 Jul	51.6Moderate	34–80	13.1	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	54	55	55	55	56	56	57	58	58	58	59	59	59	60	59	59	59	59	59	59	59	59	59	59
Thu	59	59	58	58	58	58	57	57	57	56	56	56	55	55	55	55	55	55	55	55	54	54	54	53
Fri	53	53	52	52	52	52	52	51	51	51	50	50	50	49	48	48	47	47	46	46	45	45	44	44
Sat	44	44	43	43	43	43	43	44	44	44	44	45	45	46	47	47	48	49	49	50	50	50	50	50
Sun	50	51	51	51	52	52	52	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	52
Mon	52	52	52	51	51	50	50	49	49	49	48	48	47	47	47	46	46	46	46	46	46	46	46	47
Tue	47	47	48	48	48	49	49	49	50	50	51	52	52	53	53	53	54	54	54	55	55	56	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	63.5Moderate	80	17.6	168 / 168
Nakhon Ratchasima	61.9Moderate	83	15.2	168 / 168
Bangkok	60.3Moderate	81	14.2	168 / 168
Chiang Mai	51.2Moderate	57	10.5	168 / 168
Hat Yai	51.2Moderate	59	10	168 / 168
Phuket	46.5Good	60	8.4	168 / 168
Chiang Rai	39.6Good	51	7.2	168 / 168
Pattaya	38Good	53	7.2	168 / 168

City-hours by category

Good: 553

Moderate: 791

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