20 – 26 Nov 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

53.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 11.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-11.8 AQI compared with the previous week’s mean of 65.1.

Highest hourly estimate: 115 in Chiang Mai · 22 Nov, 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, 20 Nov	59.8Moderate	38–97	13.8	192 / 192
Thu, 21 Nov	54.8Moderate	31–108	11.5	192 / 192
Fri, 22 Nov	53.1Moderate	28–115	12.4	192 / 192
Sat, 23 Nov	53.4Moderate	29–112	10.5	192 / 192
Sun, 24 Nov	51.8Moderate	27–114	11.8	192 / 192
Mon, 25 Nov	51.5Moderate	22–111	12.2	192 / 192
Tue, 26 Nov	48.5Good	22–95	11.3	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	58	58	59	59	59	59	60	60	60	60	60	60	60	60	60	60	60	61	63	63	61	60	59	59
Thu	59	58	57	57	56	55	54	53	53	53	53	52	52	52	52	53	54	59	61	60	56	53	52	51
Fri	50	50	50	49	49	49	48	48	48	49	49	50	51	52	53	55	58	63	66	64	60	56	54	54
Sat	53	52	51	51	51	50	50	50	50	49	50	50	50	51	52	54	60	66	67	64	57	53	52	51
Sun	51	50	50	50	50	50	50	49	49	49	50	50	50	50	51	52	56	61	63	60	54	50	50	49
Mon	49	49	49	49	50	50	50	50	51	51	51	51	52	52	53	53	53	57	57	54	52	52	51	50
Tue	49	49	48	48	48	48	47	47	46	46	46	46	46	47	48	50	50	51	52	51	51	50	50	49

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	87.3Moderate	115	28.2	168 / 168
Bangkok	75.3Moderate	114	19.8	168 / 168
Chiang Rai	62.3Moderate	68	15.3	168 / 168
Khon Kaen	46.9Good	68	8.2	168 / 168
Pattaya	41.2Good	55	6.1	168 / 168
Nakhon Ratchasima	39.3Good	50	5.4	168 / 168
Phuket	39.1Good	58	6.7	168 / 168
Hat Yai	34.7Good	56	5.8	168 / 168

City-hours by category

Good: 711

Moderate: 613

Unhealthy for Sensitive Groups: 20

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	58	58	59	59	59	59	60	60	60	60	60	60	60	60	60	60	60	61	63	63	61	60	59	59
Thu	59	58	57	57	56	55	54	53	53	53	53	52	52	52	52	53	54	59	61	60	56	53	52	51
Fri	50	50	50	49	49	49	48	48	48	49	49	50	51	52	53	55	58	63	66	64	60	56	54	54
Sat	53	52	51	51	51	50	50	50	50	49	50	50	50	51	52	54	60	66	67	64	57	53	52	51
Sun	51	50	50	50	50	50	50	49	49	49	50	50	50	50	51	52	56	61	63	60	54	50	50	49
Mon	49	49	49	49	50	50	50	50	51	51	51	51	52	52	53	53	53	57	57	54	52	52	51	50
Tue	49	49	48	48	48	48	47	47	46	46	46	46	46	47	48	50	50	51	52	51	51	50	50	49

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	58	58	59	59	59	59	60	60	60	60	60	60	60	60	60	60	60	61	63	63	61	60	59	59
Thu	59	58	57	57	56	55	54	53	53	53	53	52	52	52	52	53	54	59	61	60	56	53	52	51
Fri	50	50	50	49	49	49	48	48	48	49	49	50	51	52	53	55	58	63	66	64	60	56	54	54
Sat	53	52	51	51	51	50	50	50	50	49	50	50	50	51	52	54	60	66	67	64	57	53	52	51
Sun	51	50	50	50	50	50	50	49	49	49	50	50	50	50	51	52	56	61	63	60	54	50	50	49
Mon	49	49	49	49	50	50	50	50	51	51	51	51	52	52	53	53	53	57	57	54	52	52	51	50
Tue	49	49	48	48	48	48	47	47	46	46	46	46	46	47	48	50	50	51	52	51	51	50	50	49

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	58	58	59	59	59	59	60	60	60	60	60	60	60	60	60	60	60	61	63	63	61	60	59	59
Thu	59	58	57	57	56	55	54	53	53	53	53	52	52	52	52	53	54	59	61	60	56	53	52	51
Fri	50	50	50	49	49	49	48	48	48	49	49	50	51	52	53	55	58	63	66	64	60	56	54	54
Sat	53	52	51	51	51	50	50	50	50	49	50	50	50	51	52	54	60	66	67	64	57	53	52	51
Sun	51	50	50	50	50	50	50	49	49	49	50	50	50	50	51	52	56	61	63	60	54	50	50	49
Mon	49	49	49	49	50	50	50	50	51	51	51	51	52	52	53	53	53	57	57	54	52	52	51	50
Tue	49	49	48	48	48	48	47	47	46	46	46	46	46	47	48	50	50	51	52	51	51	50	50	49