23 – 29 Nov 2022 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

65.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-12.2 AQI compared with the previous week’s mean of 77.9.

Highest hourly estimate: 299 in Bangkok · 29 Nov, 20:00 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, 23 Nov	79.4Moderate	27–296	21.6	192 / 192
Thu, 24 Nov	60.7Moderate	29–167	13.2	192 / 192
Fri, 25 Nov	55.3Moderate	30–90	12.8	192 / 192
Sat, 26 Nov	52.5Moderate	30–98	12.2	192 / 192
Sun, 27 Nov	59.7Moderate	39–97	15.9	192 / 192
Mon, 28 Nov	73.4Moderate	47–250	21	192 / 192
Tue, 29 Nov	79.2Moderate	33–299	26.3	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	79	74	72	72	72	72	72	72	72	72	72	75	76	77	78	85	93	99	85	99	95	89	82	72
Thu	69	68	67	66	66	65	65	65	64	64	62	60	59	58	57	56	56	58	59	57	54	54	54	55
Fri	55	55	55	55	56	56	56	56	56	56	56	56	56	56	56	56	55	55	55	55	55	54	54	54
Sat	54	53	53	53	53	53	52	52	52	52	51	51	51	51	51	52	52	53	55	54	53	53	53	54
Sun	54	55	55	56	57	58	58	59	60	60	61	61	61	61	61	61	62	62	62	62	62	62	62	62
Mon	63	63	64	64	64	65	65	66	66	67	67	68	73	78	78	80	83	85	86	86	85	84	82	80
Tue	74	74	74	74	74	74	74	74	74	74	74	75	81	83	82	84	88	91	75	74	91	90	87	83

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	135.7Unhealthy for Sensitive Groups	299	48.9	168 / 168
Chiang Mai	73.2Moderate	103	21	168 / 168
Pattaya	61.6Moderate	205	12.5	168 / 168
Khon Kaen	59.1Moderate	87	15.1	168 / 168
Nakhon Ratchasima	57.7Moderate	90	14.8	168 / 168
Chiang Rai	55.4Moderate	64	12.4	168 / 168
Hat Yai	45.3Good	57	8.8	168 / 168
Phuket	38Good	53	7	168 / 168

City-hours by category

Good: 426

Moderate: 820

Unhealthy for Sensitive Groups: 24

Unhealthy: 44

Very Unhealthy: 30

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	79	74	72	72	72	72	72	72	72	72	72	75	76	77	78	85	93	99	85	99	95	89	82	72
Thu	69	68	67	66	66	65	65	65	64	64	62	60	59	58	57	56	56	58	59	57	54	54	54	55
Fri	55	55	55	55	56	56	56	56	56	56	56	56	56	56	56	56	55	55	55	55	55	54	54	54
Sat	54	53	53	53	53	53	52	52	52	52	51	51	51	51	51	52	52	53	55	54	53	53	53	54
Sun	54	55	55	56	57	58	58	59	60	60	61	61	61	61	61	61	62	62	62	62	62	62	62	62
Mon	63	63	64	64	64	65	65	66	66	67	67	68	73	78	78	80	83	85	86	86	85	84	82	80
Tue	74	74	74	74	74	74	74	74	74	74	74	75	81	83	82	84	88	91	75	74	91	90	87	83

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	79	74	72	72	72	72	72	72	72	72	72	75	76	77	78	85	93	99	85	99	95	89	82	72
Thu	69	68	67	66	66	65	65	65	64	64	62	60	59	58	57	56	56	58	59	57	54	54	54	55
Fri	55	55	55	55	56	56	56	56	56	56	56	56	56	56	56	56	55	55	55	55	55	54	54	54
Sat	54	53	53	53	53	53	52	52	52	52	51	51	51	51	51	52	52	53	55	54	53	53	53	54
Sun	54	55	55	56	57	58	58	59	60	60	61	61	61	61	61	61	62	62	62	62	62	62	62	62
Mon	63	63	64	64	64	65	65	66	66	67	67	68	73	78	78	80	83	85	86	86	85	84	82	80
Tue	74	74	74	74	74	74	74	74	74	74	74	75	81	83	82	84	88	91	75	74	91	90	87	83

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	79	74	72	72	72	72	72	72	72	72	72	75	76	77	78	85	93	99	85	99	95	89	82	72
Thu	69	68	67	66	66	65	65	65	64	64	62	60	59	58	57	56	56	58	59	57	54	54	54	55
Fri	55	55	55	55	56	56	56	56	56	56	56	56	56	56	56	56	55	55	55	55	55	54	54	54
Sat	54	53	53	53	53	53	52	52	52	52	51	51	51	51	51	52	52	53	55	54	53	53	53	54
Sun	54	55	55	56	57	58	58	59	60	60	61	61	61	61	61	61	62	62	62	62	62	62	62	62
Mon	63	63	64	64	64	65	65	66	66	67	67	68	73	78	78	80	83	85	86	86	85	84	82	80
Tue	74	74	74	74	74	74	74	74	74	74	74	75	81	83	82	84	88	91	75	74	91	90	87	83