24 – 30 Jul 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

44Weekly mean modelled AQI · Good

Mean PM2.5: 10.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-4.8 AQI compared with the previous week’s mean of 48.8.

Highest hourly estimate: 108 in Hat Yai · 30 Jul, 18:00 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, 24 Jul	45.4Good	19–73	9.6	192 / 192
Thu, 25 Jul	43.1Good	18–74	8.9	192 / 192
Fri, 26 Jul	40.1Good	16–84	10.1	192 / 192
Sat, 27 Jul	43.2Good	21–84	11.4	192 / 192
Sun, 28 Jul	50.3Moderate	22–96	11.7	192 / 192
Mon, 29 Jul	43.2Good	18–97	9.5	192 / 192
Tue, 30 Jul	42.9Good	17–108	10.4	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	50	49	49	48	47	47	46	46	46	45	45	45	45	45	45	45	44	44	44	44	44	43	43	43
Thu	44	44	44	44	44	44	44	44	44	44	43	43	43	43	43	43	43	43	43	43	42	42	41	40
Fri	40	40	39	39	39	39	39	38	39	39	40	40	40	40	40	41	41	41	41	41	42	42	42	42
Sat	42	42	42	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	45	45	45	46	46
Sun	47	48	48	49	49	50	50	51	51	51	51	51	51	52	52	52	52	52	52	51	51	50	49	48
Mon	48	47	46	45	45	44	44	43	43	43	43	43	42	42	42	42	42	42	42	42	42	42	42	42
Tue	42	42	42	41	41	41	41	41	41	40	40	40	41	41	41	42	43	46	48	48	48	48	47	47

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	80.9Moderate	108	25.6	168 / 168
Phuket	70.6Moderate	83	20	168 / 168
Khon Kaen	42.6Good	58	8.3	168 / 168
Chiang Mai	39.4Good	52	7.1	168 / 168
Chiang Rai	37Good	43	6.6	168 / 168
Nakhon Ratchasima	33.3Good	56	5.9	168 / 168
Bangkok	24.9Good	50	4.3	168 / 168
Pattaya	23.4Good	34	3.9	168 / 168

City-hours by category

Good: 959

Moderate: 382

Unhealthy for Sensitive Groups: 3

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	50	49	49	48	47	47	46	46	46	45	45	45	45	45	45	45	44	44	44	44	44	43	43	43
Thu	44	44	44	44	44	44	44	44	44	44	43	43	43	43	43	43	43	43	43	43	42	42	41	40
Fri	40	40	39	39	39	39	39	38	39	39	40	40	40	40	40	41	41	41	41	41	42	42	42	42
Sat	42	42	42	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	45	45	45	46	46
Sun	47	48	48	49	49	50	50	51	51	51	51	51	51	52	52	52	52	52	52	51	51	50	49	48
Mon	48	47	46	45	45	44	44	43	43	43	43	43	42	42	42	42	42	42	42	42	42	42	42	42
Tue	42	42	42	41	41	41	41	41	41	40	40	40	41	41	41	42	43	46	48	48	48	48	47	47

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	50	49	49	48	47	47	46	46	46	45	45	45	45	45	45	45	44	44	44	44	44	43	43	43
Thu	44	44	44	44	44	44	44	44	44	44	43	43	43	43	43	43	43	43	43	43	42	42	41	40
Fri	40	40	39	39	39	39	39	38	39	39	40	40	40	40	40	41	41	41	41	41	42	42	42	42
Sat	42	42	42	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	45	45	45	46	46
Sun	47	48	48	49	49	50	50	51	51	51	51	51	51	52	52	52	52	52	52	51	51	50	49	48
Mon	48	47	46	45	45	44	44	43	43	43	43	43	42	42	42	42	42	42	42	42	42	42	42	42
Tue	42	42	42	41	41	41	41	41	41	40	40	40	41	41	41	42	43	46	48	48	48	48	47	47

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	50	49	49	48	47	47	46	46	46	45	45	45	45	45	45	45	44	44	44	44	44	43	43	43
Thu	44	44	44	44	44	44	44	44	44	44	43	43	43	43	43	43	43	43	43	43	42	42	41	40
Fri	40	40	39	39	39	39	39	38	39	39	40	40	40	40	40	41	41	41	41	41	42	42	42	42
Sat	42	42	42	42	42	42	42	42	42	42	42	42	42	43	43	43	44	44	45	45	45	45	46	46
Sun	47	48	48	49	49	50	50	51	51	51	51	51	51	52	52	52	52	52	52	51	51	50	49	48
Mon	48	47	46	45	45	44	44	43	43	43	43	43	42	42	42	42	42	42	42	42	42	42	42	42
Tue	42	42	42	41	41	41	41	41	41	40	40	40	41	41	41	42	43	46	48	48	48	48	47	47