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

Thailand weekly air quality

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

62Weekly 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.

-1.6 AQI compared with the previous week’s mean of 63.6.

Highest hourly estimate: 205 in Bangkok · 10 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, 4 Dec	65.2Moderate	30–151	15.5	192 / 192
Thu, 5 Dec	61.2Moderate	29–122	15.6	192 / 192
Fri, 6 Dec	60.3Moderate	28–151	12.7	192 / 192
Sat, 7 Dec	55.2Moderate	26–115	14	192 / 192
Sun, 8 Dec	58.5Moderate	27–99	13.5	192 / 192
Mon, 9 Dec	63.4Moderate	35–184	15.4	192 / 192
Tue, 10 Dec	70.3Moderate	33–205	17	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	65	65	65	64	64	64	64	64	63	63	62	62	61	61	62	62	67	75	78	76	70	65	63	61
Thu	59	59	58	58	58	58	58	57	58	58	59	59	60	60	61	61	63	66	70	71	69	66	63	61
Fri	60	60	60	59	59	59	59	59	59	58	57	56	56	56	56	57	62	69	72	71	68	63	58	55
Sat	53	52	52	52	52	51	51	51	52	53	54	54	55	55	56	57	58	62	65	63	60	58	56	56
Sun	55	55	55	55	55	56	56	57	56	56	56	56	57	57	58	60	62	64	65	65	64	63	62	61
Mon	59	57	56	55	54	53	52	52	52	52	53	53	54	55	56	63	73	82	88	89	87	83	76	67
Tue	61	60	61	61	61	61	61	61	61	61	61	62	62	62	65	69	78	91	98	96	93	88	82	74

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	99.3Moderate	205	29.7	168 / 168
Chiang Mai	91.9Moderate	151	30.4	168 / 168
Chiang Rai	67Moderate	97	17.9	168 / 168
Pattaya	60.6Moderate	151	10	168 / 168
Khon Kaen	50Good	99	8.3	168 / 168
Phuket	45.6Good	67	8.5	168 / 168
Nakhon Ratchasima	44Good	82	7.6	168 / 168
Hat Yai	37.7Good	59	6	168 / 168

City-hours by category

Good: 570

Moderate: 698

Unhealthy for Sensitive Groups: 60

Unhealthy: 13

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	65	65	65	64	64	64	64	64	63	63	62	62	61	61	62	62	67	75	78	76	70	65	63	61
Thu	59	59	58	58	58	58	58	57	58	58	59	59	60	60	61	61	63	66	70	71	69	66	63	61
Fri	60	60	60	59	59	59	59	59	59	58	57	56	56	56	56	57	62	69	72	71	68	63	58	55
Sat	53	52	52	52	52	51	51	51	52	53	54	54	55	55	56	57	58	62	65	63	60	58	56	56
Sun	55	55	55	55	55	56	56	57	56	56	56	56	57	57	58	60	62	64	65	65	64	63	62	61
Mon	59	57	56	55	54	53	52	52	52	52	53	53	54	55	56	63	73	82	88	89	87	83	76	67
Tue	61	60	61	61	61	61	61	61	61	61	61	62	62	62	65	69	78	91	98	96	93	88	82	74

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	65	65	65	64	64	64	64	64	63	63	62	62	61	61	62	62	67	75	78	76	70	65	63	61
Thu	59	59	58	58	58	58	58	57	58	58	59	59	60	60	61	61	63	66	70	71	69	66	63	61
Fri	60	60	60	59	59	59	59	59	59	58	57	56	56	56	56	57	62	69	72	71	68	63	58	55
Sat	53	52	52	52	52	51	51	51	52	53	54	54	55	55	56	57	58	62	65	63	60	58	56	56
Sun	55	55	55	55	55	56	56	57	56	56	56	56	57	57	58	60	62	64	65	65	64	63	62	61
Mon	59	57	56	55	54	53	52	52	52	52	53	53	54	55	56	63	73	82	88	89	87	83	76	67
Tue	61	60	61	61	61	61	61	61	61	61	61	62	62	62	65	69	78	91	98	96	93	88	82	74

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	65	65	65	64	64	64	64	64	63	63	62	62	61	61	62	62	67	75	78	76	70	65	63	61
Thu	59	59	58	58	58	58	58	57	58	58	59	59	60	60	61	61	63	66	70	71	69	66	63	61
Fri	60	60	60	59	59	59	59	59	59	58	57	56	56	56	56	57	62	69	72	71	68	63	58	55
Sat	53	52	52	52	52	51	51	51	52	53	54	54	55	55	56	57	58	62	65	63	60	58	56	56
Sun	55	55	55	55	55	56	56	57	56	56	56	56	57	57	58	60	62	64	65	65	64	63	62	61
Mon	59	57	56	55	54	53	52	52	52	52	53	53	54	55	56	63	73	82	88	89	87	83	76	67
Tue	61	60	61	61	61	61	61	61	61	61	61	62	62	62	65	69	78	91	98	96	93	88	82	74