11 – 17 Dec 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

57.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 12.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-4.9 AQI compared with the previous week’s mean of 62.

Highest hourly estimate: 156 in Bangkok · 17 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, 11 Dec	68.4Moderate	38–124	15.8	192 / 192
Thu, 12 Dec	60.8Moderate	31–110	12.3	192 / 192
Fri, 13 Dec	49.6Good	20–84	9.7	192 / 192
Sat, 14 Dec	51.5Moderate	20–90	11.8	192 / 192
Sun, 15 Dec	54Moderate	23–123	9.6	192 / 192
Mon, 16 Dec	53.7Moderate	24–82	12.6	192 / 192
Tue, 17 Dec	61.3Moderate	32–156	13.5	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	70	67	64	65	65	65	65	65	65	65	65	65	65	65	65	66	69	75	80	80	79	75	72	69
Thu	67	66	64	63	61	60	59	59	59	58	58	57	57	58	60	61	63	66	66	65	61	59	58	57
Fri	56	54	53	52	51	50	49	48	47	46	45	44	44	44	44	46	47	50	53	54	55	55	54	52
Sat	50	47	47	47	47	47	46	46	46	47	47	47	48	49	50	52	53	56	60	63	64	61	59	56
Sun	54	52	51	50	50	49	49	49	48	48	48	48	48	49	49	51	53	58	63	66	68	68	65	62
Mon	58	54	51	51	50	49	49	49	49	49	49	50	50	51	52	53	54	56	59	62	63	63	61	59
Tue	57	56	56	56	56	56	56	56	56	57	57	57	58	58	58	60	65	71	74	76	75	72	67	62

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	79.1Moderate	110	23.8	168 / 168
Bangkok	78.1Moderate	156	19.3	168 / 168
Chiang Rai	63.5Moderate	69	15.9	168 / 168
Khon Kaen	55.2Moderate	83	11.3	168 / 168
Pattaya	53.4Moderate	110	8	168 / 168
Nakhon Ratchasima	47.6Good	85	7.3	168 / 168
Hat Yai	40.3Good	104	6.6	168 / 168
Phuket	39.3Good	96	5.3	168 / 168

City-hours by category

Good: 526

Moderate: 773

Unhealthy for Sensitive Groups: 43

Unhealthy: 2

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	70	67	64	65	65	65	65	65	65	65	65	65	65	65	65	66	69	75	80	80	79	75	72	69
Thu	67	66	64	63	61	60	59	59	59	58	58	57	57	58	60	61	63	66	66	65	61	59	58	57
Fri	56	54	53	52	51	50	49	48	47	46	45	44	44	44	44	46	47	50	53	54	55	55	54	52
Sat	50	47	47	47	47	47	46	46	46	47	47	47	48	49	50	52	53	56	60	63	64	61	59	56
Sun	54	52	51	50	50	49	49	49	48	48	48	48	48	49	49	51	53	58	63	66	68	68	65	62
Mon	58	54	51	51	50	49	49	49	49	49	49	50	50	51	52	53	54	56	59	62	63	63	61	59
Tue	57	56	56	56	56	56	56	56	56	57	57	57	58	58	58	60	65	71	74	76	75	72	67	62

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	70	67	64	65	65	65	65	65	65	65	65	65	65	65	65	66	69	75	80	80	79	75	72	69
Thu	67	66	64	63	61	60	59	59	59	58	58	57	57	58	60	61	63	66	66	65	61	59	58	57
Fri	56	54	53	52	51	50	49	48	47	46	45	44	44	44	44	46	47	50	53	54	55	55	54	52
Sat	50	47	47	47	47	47	46	46	46	47	47	47	48	49	50	52	53	56	60	63	64	61	59	56
Sun	54	52	51	50	50	49	49	49	48	48	48	48	48	49	49	51	53	58	63	66	68	68	65	62
Mon	58	54	51	51	50	49	49	49	49	49	49	50	50	51	52	53	54	56	59	62	63	63	61	59
Tue	57	56	56	56	56	56	56	56	56	57	57	57	58	58	58	60	65	71	74	76	75	72	67	62

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	70	67	64	65	65	65	65	65	65	65	65	65	65	65	65	66	69	75	80	80	79	75	72	69
Thu	67	66	64	63	61	60	59	59	59	58	58	57	57	58	60	61	63	66	66	65	61	59	58	57
Fri	56	54	53	52	51	50	49	48	47	46	45	44	44	44	44	46	47	50	53	54	55	55	54	52
Sat	50	47	47	47	47	47	46	46	46	47	47	47	48	49	50	52	53	56	60	63	64	61	59	56
Sun	54	52	51	50	50	49	49	49	48	48	48	48	48	49	49	51	53	58	63	66	68	68	65	62
Mon	58	54	51	51	50	49	49	49	49	49	49	50	50	51	52	53	54	56	59	62	63	63	61	59
Tue	57	56	56	56	56	56	56	56	56	57	57	57	58	58	58	60	65	71	74	76	75	72	67	62