2 – 8 Oct 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

57.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 14.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-6.2 AQI compared with the previous week’s mean of 63.5.

Highest hourly estimate: 207 in Bangkok · 6 Oct, 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, 2 Oct	45Good	19–74	8	192 / 192
Thu, 3 Oct	42Good	23–66	9.2	192 / 192
Fri, 4 Oct	44.5Good	24–73	10.1	192 / 192
Sat, 5 Oct	57.6Moderate	28–184	14.6	192 / 192
Sun, 6 Oct	69.2Moderate	27–207	20.2	192 / 192
Mon, 7 Oct	72.9Moderate	27–173	19	192 / 192
Tue, 8 Oct	69.9Moderate	31–167	18.5	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	48	47	47	47	46	46	46	46	46	46	45	45	44	44	44	44	44	44	44	44	44	43	43	42
Thu	42	42	41	41	41	40	40	41	41	41	41	41	42	42	42	42	43	43	44	44	44	44	44	44
Fri	44	44	45	45	45	45	45	45	44	44	44	44	43	44	43	43	44	45	46	45	45	45	46	47
Sat	48	49	49	50	50	51	52	52	53	53	53	54	55	55	56	59	66	73	76	74	69	66	63	58
Sun	58	58	58	59	59	60	60	61	61	62	63	64	65	66	68	74	86	95	96	92	83	74	70	71
Mon	71	71	71	71	71	71	70	70	70	70	70	69	69	68	69	72	81	89	90	85	77	72	68	67
Tue	68	68	68	69	69	69	70	70	69	69	69	68	68	68	68	69	70	76	78	76	73	72	68	67

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	94.8Moderate	207	29.9	168 / 168
Khon Kaen	69.6Moderate	134	16.8	168 / 168
Chiang Mai	67.9Moderate	124	18.9	168 / 168
Nakhon Ratchasima	53.5Moderate	74	11.2	168 / 168
Chiang Rai	51.9Moderate	60	11.2	168 / 168
Pattaya	49.3Good	109	12.9	168 / 168
Hat Yai	37.1Good	46	6.8	168 / 168
Phuket	34.3Good	54	6	168 / 168

City-hours by category

Good: 552

Moderate: 693

Unhealthy for Sensitive Groups: 78

Unhealthy: 18

Very Unhealthy: 3

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	48	47	47	47	46	46	46	46	46	46	45	45	44	44	44	44	44	44	44	44	44	43	43	42
Thu	42	42	41	41	41	40	40	41	41	41	41	41	42	42	42	42	43	43	44	44	44	44	44	44
Fri	44	44	45	45	45	45	45	45	44	44	44	44	43	44	43	43	44	45	46	45	45	45	46	47
Sat	48	49	49	50	50	51	52	52	53	53	53	54	55	55	56	59	66	73	76	74	69	66	63	58
Sun	58	58	58	59	59	60	60	61	61	62	63	64	65	66	68	74	86	95	96	92	83	74	70	71
Mon	71	71	71	71	71	71	70	70	70	70	70	69	69	68	69	72	81	89	90	85	77	72	68	67
Tue	68	68	68	69	69	69	70	70	69	69	69	68	68	68	68	69	70	76	78	76	73	72	68	67

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	48	47	47	47	46	46	46	46	46	46	45	45	44	44	44	44	44	44	44	44	44	43	43	42
Thu	42	42	41	41	41	40	40	41	41	41	41	41	42	42	42	42	43	43	44	44	44	44	44	44
Fri	44	44	45	45	45	45	45	45	44	44	44	44	43	44	43	43	44	45	46	45	45	45	46	47
Sat	48	49	49	50	50	51	52	52	53	53	53	54	55	55	56	59	66	73	76	74	69	66	63	58
Sun	58	58	58	59	59	60	60	61	61	62	63	64	65	66	68	74	86	95	96	92	83	74	70	71
Mon	71	71	71	71	71	71	70	70	70	70	70	69	69	68	69	72	81	89	90	85	77	72	68	67
Tue	68	68	68	69	69	69	70	70	69	69	69	68	68	68	68	69	70	76	78	76	73	72	68	67

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	48	47	47	47	46	46	46	46	46	46	45	45	44	44	44	44	44	44	44	44	44	43	43	42
Thu	42	42	41	41	41	40	40	41	41	41	41	41	42	42	42	42	43	43	44	44	44	44	44	44
Fri	44	44	45	45	45	45	45	45	44	44	44	44	43	44	43	43	44	45	46	45	45	45	46	47
Sat	48	49	49	50	50	51	52	52	53	53	53	54	55	55	56	59	66	73	76	74	69	66	63	58
Sun	58	58	58	59	59	60	60	61	61	62	63	64	65	66	68	74	86	95	96	92	83	74	70	71
Mon	71	71	71	71	71	71	70	70	70	70	70	69	69	68	69	72	81	89	90	85	77	72	68	67
Tue	68	68	68	69	69	69	70	70	69	69	69	68	68	68	68	69	70	76	78	76	73	72	68	67