27 Nov – 3 Dec 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

63.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 14.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+10.3 AQI compared with the previous week’s mean of 53.3.

Highest hourly estimate: 203 in Bangkok · 2 Dec, 19:00 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, 27 Nov	54.3Moderate	26–95	11.8	192 / 192
Thu, 28 Nov	56.9Moderate	32–110	10.8	192 / 192
Fri, 29 Nov	58.8Moderate	30–122	14.1	192 / 192
Sat, 30 Nov	64.4Moderate	36–162	15.1	192 / 192
Sun, 1 Dec	67Moderate	41–181	16.2	192 / 192
Mon, 2 Dec	73.7Moderate	40–203	17.9	192 / 192
Tue, 3 Dec	70.2Moderate	37–148	17.5	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	49	49	49	49	49	49	49	49	49	49	50	51	52	53	54	55	59	62	64	65	64	62	61	59
Thu	58	56	55	54	53	53	52	52	53	53	53	54	54	55	55	58	61	66	69	68	65	61	56	54
Fri	52	51	51	51	52	53	54	54	55	55	55	56	56	56	57	60	65	69	73	74	72	68	64	60
Sat	60	60	60	61	61	61	61	61	61	61	61	61	61	61	61	62	69	76	79	78	76	72	66	61
Sun	62	62	61	61	61	61	61	61	61	61	61	61	61	61	62	63	71	84	90	88	82	77	71	64
Mon	63	63	64	64	64	65	64	65	65	66	66	66	66	66	67	70	84	97	103	102	96	89	82	73
Tue	69	67	67	67	67	67	67	67	67	67	67	67	67	67	67	67	74	82	85	83	76	72	69	66

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	95.5Moderate	203	27.4	168 / 168
Chiang Mai	88.7Moderate	143	28.1	168 / 168
Chiang Rai	59.4Moderate	69	14	168 / 168
Pattaya	59.3Moderate	131	10.6	168 / 168
Khon Kaen	58.6Moderate	92	12.2	168 / 168
Nakhon Ratchasima	52.1Moderate	77	8.9	168 / 168
Phuket	49.3Good	95	8.8	168 / 168
Hat Yai	45.9Good	62	8.4	168 / 168

City-hours by category

Good: 379

Moderate: 875

Unhealthy for Sensitive Groups: 76

Unhealthy: 12

Very Unhealthy: 2

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	49	49	49	49	49	49	49	49	49	49	50	51	52	53	54	55	59	62	64	65	64	62	61	59
Thu	58	56	55	54	53	53	52	52	53	53	53	54	54	55	55	58	61	66	69	68	65	61	56	54
Fri	52	51	51	51	52	53	54	54	55	55	55	56	56	56	57	60	65	69	73	74	72	68	64	60
Sat	60	60	60	61	61	61	61	61	61	61	61	61	61	61	61	62	69	76	79	78	76	72	66	61
Sun	62	62	61	61	61	61	61	61	61	61	61	61	61	61	62	63	71	84	90	88	82	77	71	64
Mon	63	63	64	64	64	65	64	65	65	66	66	66	66	66	67	70	84	97	103	102	96	89	82	73
Tue	69	67	67	67	67	67	67	67	67	67	67	67	67	67	67	67	74	82	85	83	76	72	69	66

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	49	49	49	49	49	49	49	49	49	49	50	51	52	53	54	55	59	62	64	65	64	62	61	59
Thu	58	56	55	54	53	53	52	52	53	53	53	54	54	55	55	58	61	66	69	68	65	61	56	54
Fri	52	51	51	51	52	53	54	54	55	55	55	56	56	56	57	60	65	69	73	74	72	68	64	60
Sat	60	60	60	61	61	61	61	61	61	61	61	61	61	61	61	62	69	76	79	78	76	72	66	61
Sun	62	62	61	61	61	61	61	61	61	61	61	61	61	61	62	63	71	84	90	88	82	77	71	64
Mon	63	63	64	64	64	65	64	65	65	66	66	66	66	66	67	70	84	97	103	102	96	89	82	73
Tue	69	67	67	67	67	67	67	67	67	67	67	67	67	67	67	67	74	82	85	83	76	72	69	66

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	49	49	49	49	49	49	49	49	49	49	50	51	52	53	54	55	59	62	64	65	64	62	61	59
Thu	58	56	55	54	53	53	52	52	53	53	53	54	54	55	55	58	61	66	69	68	65	61	56	54
Fri	52	51	51	51	52	53	54	54	55	55	55	56	56	56	57	60	65	69	73	74	72	68	64	60
Sat	60	60	60	61	61	61	61	61	61	61	61	61	61	61	61	62	69	76	79	78	76	72	66	61
Sun	62	62	61	61	61	61	61	61	61	61	61	61	61	61	62	63	71	84	90	88	82	77	71	64
Mon	63	63	64	64	64	65	64	65	65	66	66	66	66	66	67	70	84	97	103	102	96	89	82	73
Tue	69	67	67	67	67	67	67	67	67	67	67	67	67	67	67	67	74	82	85	83	76	72	69	66