26 Jun – 2 Jul 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

50.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 10.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+5 AQI compared with the previous week’s mean of 45.8.

Highest hourly estimate: 87 in Phuket · 26 Jun, 16:00 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, 26 Jun	47Good	16–87	9.4	192 / 192
Thu, 27 Jun	48.2Good	22–87	10.8	192 / 192
Fri, 28 Jun	54.2Moderate	28–72	13.4	192 / 192
Sat, 29 Jun	54.7Moderate	35–72	10.5	192 / 192
Sun, 30 Jun	50.2Moderate	34–63	9.9	192 / 192
Mon, 1 Jul	50Good	19–69	10.5	192 / 192
Tue, 2 Jul	51.2Moderate	19–86	12.1	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	48	48	47	47	47	47	47	47	47	47	47	47	47	47	48	48	48	49	49	47	46	44	44	44
Thu	44	44	44	44	44	44	45	45	46	47	48	49	49	50	50	51	52	52	53	53	52	52	51	51
Fri	52	52	52	52	52	52	52	53	53	53	54	54	54	54	55	55	56	56	56	57	57	57	57	57
Sat	57	57	57	57	57	57	56	56	56	55	55	55	55	55	54	54	54	53	53	53	53	52	52	52
Sun	52	52	52	52	52	52	51	51	51	51	50	50	50	50	49	49	49	49	49	49	49	49	49	49
Mon	50	50	50	50	50	49	49	49	49	49	49	49	49	50	50	51	51	51	52	52	51	51	51	50
Tue	50	50	50	49	49	49	49	49	49	50	50	50	51	51	51	52	52	52	54	55	55	55	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
Hat Yai	59.6Moderate	83	13.1	168 / 168
Khon Kaen	59.2Moderate	72	13.8	168 / 168
Phuket	57.5Moderate	87	12	168 / 168
Nakhon Ratchasima	51.4Moderate	66	12.1	168 / 168
Bangkok	50.3Moderate	86	12.5	168 / 168
Chiang Mai	49.8Good	60	9.3	168 / 168
Chiang Rai	40.8Good	51	7.4	168 / 168
Pattaya	37.8Good	57	7.3	168 / 168

City-hours by category

Good: 562

Moderate: 782

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