4 – 10 Sep 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

43.1Weekly mean modelled AQI · Good

Mean PM2.5: 8.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-4.3 AQI compared with the previous week’s mean of 47.4.

Highest hourly estimate: 74 in Chiang Mai · 4 Sept, 00:00 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, 4 Sep	47.4Good	17–74	10.7	192 / 192
Thu, 5 Sep	46.7Good	17–70	9.1	192 / 192
Fri, 6 Sep	45Good	18–61	8.7	192 / 192
Sat, 7 Sep	42.1Good	17–57	7.8	192 / 192
Sun, 8 Sep	40.2Good	15–60	7.6	192 / 192
Mon, 9 Sep	38.8Good	21–56	7.4	192 / 192
Tue, 10 Sep	41.8Good	20–66	8.9	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	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	48	48	49	48	49	48
Thu	48	48	48	48	48	47	47	47	46	46	46	47	47	47	47	47	47	47	46	46	46	46	46	45
Fri	45	45	45	45	45	45	45	45	45	45	45	46	46	45	45	45	45	45	45	45	45	45	45	45
Sat	45	45	44	44	43	43	43	42	42	42	41	41	41	41	41	41	42	42	42	42	42	42	41	41
Sun	40	40	40	40	40	40	40	41	41	41	41	41	40	40	40	40	40	40	40	40	40	40	40	40
Mon	40	40	39	39	39	39	39	39	38	38	38	38	38	38	38	38	39	39	39	40	40	40	40	40
Tue	40	40	40	40	40	41	41	41	41	42	42	42	42	42	42	42	43	43	43	43	43	43	43	43

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
Chiang Mai	54.2Moderate	74	11	168 / 168
Nakhon Ratchasima	53.5Moderate	66	12.3	168 / 168
Chiang Rai	49.4Good	60	9.6	168 / 168
Khon Kaen	48Good	64	10.3	168 / 168
Phuket	44.3Good	52	8.2	168 / 168
Bangkok	40.4Good	56	7.6	168 / 168
Hat Yai	33.7Good	44	6.1	168 / 168
Pattaya	21.5Good	31	3.7	168 / 168

City-hours by category

Good: 845

Moderate: 499

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

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

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