2 – 8 Aug 2023 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

41.7Weekly mean modelled AQI · Good

Mean PM2.5: 8 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 39.2.

Highest hourly estimate: 68 in Nakhon Ratchasima · 5 Aug, 22:00 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, 2 Aug	42.4Good	28–60	8.1	192 / 192
Thu, 3 Aug	42Good	24–54	7.3	192 / 192
Fri, 4 Aug	42.1Good	24–53	8.5	192 / 192
Sat, 5 Aug	46.7Good	35–68	9.8	192 / 192
Sun, 6 Aug	45.3Good	22–68	7.9	192 / 192
Mon, 7 Aug	37.3Good	18–57	6.7	192 / 192
Tue, 8 Aug	36.2Good	18–62	7.6	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	41	41	41	41	41	41	42	42	42	43	43	43	43	43	43	43	43	43	43	44	44	44	44	44
Thu	44	44	44	44	44	44	43	43	43	42	42	42	42	42	42	42	42	41	41	41	41	40	40	40
Fri	40	40	40	41	41	41	41	42	42	42	42	42	42	42	42	43	43	43	43	44	44	44	45	45
Sat	45	45	45	45	46	46	46	46	46	46	46	46	47	47	47	48	48	48	49	49	49	48	48	48
Sun	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45	45	44	44	43	43	42	42
Mon	42	41	41	40	40	39	39	38	38	37	37	37	37	36	36	36	36	35	36	35	35	35	36	36
Tue	36	36	36	35	35	35	35	35	35	35	36	35	36	36	36	36	37	37	38	38	38	38	38	38

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	55Moderate	68	12.4	168 / 168
Khon Kaen	51Moderate	61	10.2	168 / 168
Hat Yai	46.4Good	53	8.5	168 / 168
Phuket	46.3Good	52	8.8	168 / 168
Chiang Mai	39.3Good	46	7.1	168 / 168
Chiang Rai	35Good	43	6.2	168 / 168
Bangkok	32.4Good	48	5.7	168 / 168
Pattaya	28.4Good	41	4.9	168 / 168

City-hours by category

Good: 1000

Moderate: 344

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	41	41	41	41	41	41	42	42	42	43	43	43	43	43	43	43	43	43	43	44	44	44	44	44
Thu	44	44	44	44	44	44	43	43	43	42	42	42	42	42	42	42	42	41	41	41	41	40	40	40
Fri	40	40	40	41	41	41	41	42	42	42	42	42	42	42	42	43	43	43	43	44	44	44	45	45
Sat	45	45	45	45	46	46	46	46	46	46	46	46	47	47	47	48	48	48	49	49	49	48	48	48
Sun	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45	45	44	44	43	43	42	42
Mon	42	41	41	40	40	39	39	38	38	37	37	37	37	36	36	36	36	35	36	35	35	35	36	36
Tue	36	36	36	35	35	35	35	35	35	35	36	35	36	36	36	36	37	37	38	38	38	38	38	38

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	41	41	41	41	41	41	42	42	42	43	43	43	43	43	43	43	43	43	43	44	44	44	44	44
Thu	44	44	44	44	44	44	43	43	43	42	42	42	42	42	42	42	42	41	41	41	41	40	40	40
Fri	40	40	40	41	41	41	41	42	42	42	42	42	42	42	42	43	43	43	43	44	44	44	45	45
Sat	45	45	45	45	46	46	46	46	46	46	46	46	47	47	47	48	48	48	49	49	49	48	48	48
Sun	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45	45	44	44	43	43	42	42
Mon	42	41	41	40	40	39	39	38	38	37	37	37	37	36	36	36	36	35	36	35	35	35	36	36
Tue	36	36	36	35	35	35	35	35	35	35	36	35	36	36	36	36	37	37	38	38	38	38	38	38

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	41	41	41	41	41	41	42	42	42	43	43	43	43	43	43	43	43	43	43	44	44	44	44	44
Thu	44	44	44	44	44	44	43	43	43	42	42	42	42	42	42	42	42	41	41	41	41	40	40	40
Fri	40	40	40	41	41	41	41	42	42	42	42	42	42	42	42	43	43	43	43	44	44	44	45	45
Sat	45	45	45	45	46	46	46	46	46	46	46	46	47	47	47	48	48	48	49	49	49	48	48	48
Sun	48	47	47	47	47	46	46	46	46	46	46	46	46	46	45	45	45	45	44	44	43	43	42	42
Mon	42	41	41	40	40	39	39	38	38	37	37	37	37	36	36	36	36	35	36	35	35	35	36	36
Tue	36	36	36	35	35	35	35	35	35	35	36	35	36	36	36	36	37	37	38	38	38	38	38	38