28 Jun – 4 Jul 2023 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

49.2Weekly mean modelled AQI · Good

Mean PM2.5: 10.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-8.6 AQI compared with the previous week’s mean of 57.8.

Highest hourly estimate: 172 in Bangkok · 28 Jun, 20:00 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, 28 Jun	55Moderate	31–172	13.5	192 / 192
Thu, 29 Jun	54.6Moderate	25–92	11.9	192 / 192
Fri, 30 Jun	48.3Good	22–74	10.7	192 / 192
Sat, 1 Jul	51Moderate	20–69	11	192 / 192
Sun, 2 Jul	45.8Good	22–64	8.1	192 / 192
Mon, 3 Jul	42Good	22–56	8.4	192 / 192
Tue, 4 Jul	47.7Good	28–62	10.6	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	60	53	52	52	52	51	51	51	51	51	51	51	52	52	52	53	53	57	61	64	64	64	63	59
Thu	55	55	55	56	56	56	56	56	56	56	56	56	56	56	55	55	54	54	53	52	52	52	51	51
Fri	51	50	50	50	50	49	49	48	48	48	48	48	48	47	47	47	47	47	47	47	47	48	48	49
Sat	49	49	50	50	50	50	50	51	51	51	52	52	52	52	52	52	52	52	52	52	52	51	51	50
Sun	50	50	49	48	48	47	47	47	46	46	46	46	45	45	45	45	44	44	44	44	44	44	43	43
Mon	43	43	42	42	42	42	42	42	42	41	42	41	41	41	41	41	41	41	42	42	43	44	44	45
Tue	45	45	46	46	46	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	49	49	50	50

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
Bangkok	63.5Moderate	172	14.2	168 / 168
Khon Kaen	60.7Moderate	75	15.1	168 / 168
Chiang Mai	53Moderate	65	11.2	168 / 168
Nakhon Ratchasima	52.6Moderate	71	12.3	168 / 168
Chiang Rai	49.2Good	58	9.7	168 / 168
Phuket	44.9Good	62	9.1	168 / 168
Hat Yai	35.4Good	56	7	168 / 168
Pattaya	34.4Good	51	6.4	168 / 168

City-hours by category

Good: 642

Moderate: 694

Unhealthy for Sensitive Groups: 2

Unhealthy: 6

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	60	53	52	52	52	51	51	51	51	51	51	51	52	52	52	53	53	57	61	64	64	64	63	59
Thu	55	55	55	56	56	56	56	56	56	56	56	56	56	56	55	55	54	54	53	52	52	52	51	51
Fri	51	50	50	50	50	49	49	48	48	48	48	48	48	47	47	47	47	47	47	47	47	48	48	49
Sat	49	49	50	50	50	50	50	51	51	51	52	52	52	52	52	52	52	52	52	52	52	51	51	50
Sun	50	50	49	48	48	47	47	47	46	46	46	46	45	45	45	45	44	44	44	44	44	44	43	43
Mon	43	43	42	42	42	42	42	42	42	41	42	41	41	41	41	41	41	41	42	42	43	44	44	45
Tue	45	45	46	46	46	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	49	49	50	50

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	60	53	52	52	52	51	51	51	51	51	51	51	52	52	52	53	53	57	61	64	64	64	63	59
Thu	55	55	55	56	56	56	56	56	56	56	56	56	56	56	55	55	54	54	53	52	52	52	51	51
Fri	51	50	50	50	50	49	49	48	48	48	48	48	48	47	47	47	47	47	47	47	47	48	48	49
Sat	49	49	50	50	50	50	50	51	51	51	52	52	52	52	52	52	52	52	52	52	52	51	51	50
Sun	50	50	49	48	48	47	47	47	46	46	46	46	45	45	45	45	44	44	44	44	44	44	43	43
Mon	43	43	42	42	42	42	42	42	42	41	42	41	41	41	41	41	41	41	42	42	43	44	44	45
Tue	45	45	46	46	46	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	49	49	50	50

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	60	53	52	52	52	51	51	51	51	51	51	51	52	52	52	53	53	57	61	64	64	64	63	59
Thu	55	55	55	56	56	56	56	56	56	56	56	56	56	56	55	55	54	54	53	52	52	52	51	51
Fri	51	50	50	50	50	49	49	48	48	48	48	48	48	47	47	47	47	47	47	47	47	48	48	49
Sat	49	49	50	50	50	50	50	51	51	51	52	52	52	52	52	52	52	52	52	52	52	51	51	50
Sun	50	50	49	48	48	47	47	47	46	46	46	46	45	45	45	45	44	44	44	44	44	44	43	43
Mon	43	43	42	42	42	42	42	42	42	41	42	41	41	41	41	41	41	41	42	42	43	44	44	45
Tue	45	45	46	46	46	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	49	49	50	50