10 – 16 Apr 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

83.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 25.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+4.4 AQI compared with the previous week’s mean of 79.5.

Highest hourly estimate: 254 in Bangkok · 11 Apr, 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, 10 Apr	83.2Moderate	35–156	27	192 / 192
Thu, 11 Apr	95.5Moderate	53–254	32.1	192 / 192
Fri, 12 Apr	88.4Moderate	52–160	25.3	192 / 192
Sat, 13 Apr	86.7Moderate	49–126	27.3	192 / 192
Sun, 14 Apr	80.8Moderate	56–140	22.8	192 / 192
Mon, 15 Apr	77.3Moderate	51–149	22.4	192 / 192
Tue, 16 Apr	75Moderate	46–144	20.8	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	76	77	77	77	77	78	77	77	78	78	79	80	80	81	82	83	85	90	94	96	96	95	93	90
Thu	87	85	86	86	86	86	86	87	87	87	88	89	92	96	100	101	106	110	112	113	110	107	105	102
Fri	96	95	94	94	94	93	93	92	92	91	91	90	89	88	86	85	84	85	86	84	81	80	80	81
Sat	82	82	83	83	84	85	85	86	87	87	88	88	88	89	89	89	89	89	90	90	89	88	87	87
Sun	86	85	84	84	83	82	82	81	81	80	80	80	79	79	78	78	82	85	86	82	77	76	76	76
Mon	76	77	77	77	77	77	77	77	77	76	76	76	76	76	76	76	79	82	82	81	79	78	76	76
Tue	75	75	75	75	75	75	75	74	74	74	74	74	74	74	74	74	76	79	79	79	77	75	72	72

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
Khon Kaen	110.6Unhealthy for Sensitive Groups	149	38.1	168 / 168
Chiang Rai	102.7Unhealthy for Sensitive Groups	132	34	168 / 168
Chiang Mai	98.8Moderate	129	32.4	168 / 168
Nakhon Ratchasima	96.4Moderate	126	32.6	168 / 168
Bangkok	88.6Moderate	254	25	168 / 168
Pattaya	61.6Moderate	88	15.9	168 / 168
Phuket	58.1Moderate	66	13.6	168 / 168
Hat Yai	53.9Moderate	61	11.5	168 / 168

City-hours by category

Good: 59

Moderate: 914

Unhealthy for Sensitive Groups: 348

Unhealthy: 15

Very Unhealthy: 8

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	76	77	77	77	77	78	77	77	78	78	79	80	80	81	82	83	85	90	94	96	96	95	93	90
Thu	87	85	86	86	86	86	86	87	87	87	88	89	92	96	100	101	106	110	112	113	110	107	105	102
Fri	96	95	94	94	94	93	93	92	92	91	91	90	89	88	86	85	84	85	86	84	81	80	80	81
Sat	82	82	83	83	84	85	85	86	87	87	88	88	88	89	89	89	89	89	90	90	89	88	87	87
Sun	86	85	84	84	83	82	82	81	81	80	80	80	79	79	78	78	82	85	86	82	77	76	76	76
Mon	76	77	77	77	77	77	77	77	77	76	76	76	76	76	76	76	79	82	82	81	79	78	76	76
Tue	75	75	75	75	75	75	75	74	74	74	74	74	74	74	74	74	76	79	79	79	77	75	72	72

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	76	77	77	77	77	78	77	77	78	78	79	80	80	81	82	83	85	90	94	96	96	95	93	90
Thu	87	85	86	86	86	86	86	87	87	87	88	89	92	96	100	101	106	110	112	113	110	107	105	102
Fri	96	95	94	94	94	93	93	92	92	91	91	90	89	88	86	85	84	85	86	84	81	80	80	81
Sat	82	82	83	83	84	85	85	86	87	87	88	88	88	89	89	89	89	89	90	90	89	88	87	87
Sun	86	85	84	84	83	82	82	81	81	80	80	80	79	79	78	78	82	85	86	82	77	76	76	76
Mon	76	77	77	77	77	77	77	77	77	76	76	76	76	76	76	76	79	82	82	81	79	78	76	76
Tue	75	75	75	75	75	75	75	74	74	74	74	74	74	74	74	74	76	79	79	79	77	75	72	72

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	76	77	77	77	77	78	77	77	78	78	79	80	80	81	82	83	85	90	94	96	96	95	93	90
Thu	87	85	86	86	86	86	86	87	87	87	88	89	92	96	100	101	106	110	112	113	110	107	105	102
Fri	96	95	94	94	94	93	93	92	92	91	91	90	89	88	86	85	84	85	86	84	81	80	80	81
Sat	82	82	83	83	84	85	85	86	87	87	88	88	88	89	89	89	89	89	90	90	89	88	87	87
Sun	86	85	84	84	83	82	82	81	81	80	80	80	79	79	78	78	82	85	86	82	77	76	76	76
Mon	76	77	77	77	77	77	77	77	77	76	76	76	76	76	76	76	79	82	82	81	79	78	76	76
Tue	75	75	75	75	75	75	75	74	74	74	74	74	74	74	74	74	76	79	79	79	77	75	72	72