1 – 7 Jan 2025 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

76.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 20.7 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+9.1 AQI compared with the previous week’s mean of 67.3.

Highest hourly estimate: 202 in Bangkok · 7 Jan, 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, 1 Jan	71.6Moderate	46–161	19.4	192 / 192
Thu, 2 Jan	75.1Moderate	52–156	19.2	192 / 192
Fri, 3 Jan	72.2Moderate	46–136	18.5	192 / 192
Sat, 4 Jan	74Moderate	48–155	19.1	192 / 192
Sun, 5 Jan	73.6Moderate	39–140	20.2	192 / 192
Mon, 6 Jan	79.3Moderate	41–168	23.2	192 / 192
Tue, 7 Jan	89.3Moderate	54–202	25.6	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	64	64	64	65	65	65	66	66	66	66	66	67	67	67	68	69	75	87	94	93	88	81	76	71
Thu	70	70	70	70	70	70	70	69	70	70	70	70	70	70	70	72	78	92	98	96	89	82	75	72
Fri	70	69	69	69	69	69	69	69	68	68	68	68	68	68	69	71	77	85	89	87	82	75	70	68
Sat	68	68	68	68	68	68	68	68	67	67	68	68	69	70	72	75	85	94	98	95	87	78	72	70
Sun	69	69	69	69	69	69	69	69	69	69	69	69	69	69	70	74	81	89	91	88	84	78	74	72
Mon	71	72	72	72	72	72	72	72	72	72	72	73	73	74	74	78	87	98	104	102	97	90	83	80
Tue	78	79	79	79	79	79	79	79	80	81	81	81	82	82	84	88	98	110	117	116	111	105	101	96

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	102.7Unhealthy for Sensitive Groups	202	31.7	168 / 168
Chiang Mai	100.1Unhealthy for Sensitive Groups	149	33.6	168 / 168
Khon Kaen	84Moderate	127	25.4	168 / 168
Chiang Rai	74.4Moderate	92	22.3	168 / 168
Pattaya	72.6Moderate	179	14	168 / 168
Nakhon Ratchasima	70.8Moderate	102	18.5	168 / 168
Phuket	55.5Moderate	82	10.7	168 / 168
Hat Yai	51.4Moderate	62	9.9	168 / 168

City-hours by category

Good: 124

Moderate: 1044

Unhealthy for Sensitive Groups: 154

Unhealthy: 20

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	64	64	64	65	65	65	66	66	66	66	66	67	67	67	68	69	75	87	94	93	88	81	76	71
Thu	70	70	70	70	70	70	70	69	70	70	70	70	70	70	70	72	78	92	98	96	89	82	75	72
Fri	70	69	69	69	69	69	69	69	68	68	68	68	68	68	69	71	77	85	89	87	82	75	70	68
Sat	68	68	68	68	68	68	68	68	67	67	68	68	69	70	72	75	85	94	98	95	87	78	72	70
Sun	69	69	69	69	69	69	69	69	69	69	69	69	69	69	70	74	81	89	91	88	84	78	74	72
Mon	71	72	72	72	72	72	72	72	72	72	72	73	73	74	74	78	87	98	104	102	97	90	83	80
Tue	78	79	79	79	79	79	79	79	80	81	81	81	82	82	84	88	98	110	117	116	111	105	101	96

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	64	64	64	65	65	65	66	66	66	66	66	67	67	67	68	69	75	87	94	93	88	81	76	71
Thu	70	70	70	70	70	70	70	69	70	70	70	70	70	70	70	72	78	92	98	96	89	82	75	72
Fri	70	69	69	69	69	69	69	69	68	68	68	68	68	68	69	71	77	85	89	87	82	75	70	68
Sat	68	68	68	68	68	68	68	68	67	67	68	68	69	70	72	75	85	94	98	95	87	78	72	70
Sun	69	69	69	69	69	69	69	69	69	69	69	69	69	69	70	74	81	89	91	88	84	78	74	72
Mon	71	72	72	72	72	72	72	72	72	72	72	73	73	74	74	78	87	98	104	102	97	90	83	80
Tue	78	79	79	79	79	79	79	79	80	81	81	81	82	82	84	88	98	110	117	116	111	105	101	96

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	64	64	64	65	65	65	66	66	66	66	66	67	67	67	68	69	75	87	94	93	88	81	76	71
Thu	70	70	70	70	70	70	70	69	70	70	70	70	70	70	70	72	78	92	98	96	89	82	75	72
Fri	70	69	69	69	69	69	69	69	68	68	68	68	68	68	69	71	77	85	89	87	82	75	70	68
Sat	68	68	68	68	68	68	68	68	67	67	68	68	69	70	72	75	85	94	98	95	87	78	72	70
Sun	69	69	69	69	69	69	69	69	69	69	69	69	69	69	70	74	81	89	91	88	84	78	74	72
Mon	71	72	72	72	72	72	72	72	72	72	72	73	73	74	74	78	87	98	104	102	97	90	83	80
Tue	78	79	79	79	79	79	79	79	80	81	81	81	82	82	84	88	98	110	117	116	111	105	101	96