16 – 22 Oct 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

65.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-9.6 AQI compared with the previous week’s mean of 75.

Highest hourly estimate: 286 in Bangkok · 17 Oct, 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, 16 Oct	80.8Moderate	33–265	22	192 / 192
Thu, 17 Oct	74Moderate	32–286	24.1	192 / 192
Fri, 18 Oct	75.4Moderate	24–241	21.8	192 / 192
Sat, 19 Oct	60.3Moderate	26–162	11.9	192 / 192
Sun, 20 Oct	48.9Good	28–81	9.7	192 / 192
Mon, 21 Oct	50.2Moderate	30–145	11.5	192 / 192
Tue, 22 Oct	68.2Moderate	32–238	22	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	93	88	84	82	79	79	79	79	79	79	78	78	78	78	77	77	81	84	85	85	82	81	79	76
Thu	72	70	70	70	70	69	69	69	69	68	68	68	68	68	69	71	73	79	83	85	88	88	87	84
Fri	81	76	72	70	70	70	70	71	71	71	72	72	72	72	75	78	80	83	86	86	84	82	78	72
Sat	69	68	68	68	67	66	66	65	64	63	62	61	60	59	58	57	57	58	57	54	51	51	50	50
Sun	50	50	50	50	50	50	50	50	50	49	49	49	48	48	48	48	48	49	49	49	49	48	48	48
Mon	48	48	48	48	47	48	48	48	48	48	48	48	48	48	48	49	49	54	57	59	58	57	54	51
Tue	52	52	53	53	54	55	56	56	57	57	58	59	61	62	70	75	83	87	91	93	92	91	89	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	145.5Unhealthy for Sensitive Groups	286	55.8	168 / 168
Pattaya	89.7Moderate	238	25.8	168 / 168
Chiang Mai	71.4Moderate	112	19.2	168 / 168
Chiang Rai	51.1Moderate	61	10	168 / 168
Khon Kaen	43.4Good	58	7.6	168 / 168
Hat Yai	42.6Good	57	8.1	168 / 168
Nakhon Ratchasima	40.8Good	52	7.1	168 / 168
Phuket	38.7Good	52	7.1	168 / 168

City-hours by category

Good: 671

Moderate: 492

Unhealthy for Sensitive Groups: 73

Unhealthy: 68

Very Unhealthy: 40

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	93	88	84	82	79	79	79	79	79	79	78	78	78	78	77	77	81	84	85	85	82	81	79	76
Thu	72	70	70	70	70	69	69	69	69	68	68	68	68	68	69	71	73	79	83	85	88	88	87	84
Fri	81	76	72	70	70	70	70	71	71	71	72	72	72	72	75	78	80	83	86	86	84	82	78	72
Sat	69	68	68	68	67	66	66	65	64	63	62	61	60	59	58	57	57	58	57	54	51	51	50	50
Sun	50	50	50	50	50	50	50	50	50	49	49	49	48	48	48	48	48	49	49	49	49	48	48	48
Mon	48	48	48	48	47	48	48	48	48	48	48	48	48	48	48	49	49	54	57	59	58	57	54	51
Tue	52	52	53	53	54	55	56	56	57	57	58	59	61	62	70	75	83	87	91	93	92	91	89	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	93	88	84	82	79	79	79	79	79	79	78	78	78	78	77	77	81	84	85	85	82	81	79	76
Thu	72	70	70	70	70	69	69	69	69	68	68	68	68	68	69	71	73	79	83	85	88	88	87	84
Fri	81	76	72	70	70	70	70	71	71	71	72	72	72	72	75	78	80	83	86	86	84	82	78	72
Sat	69	68	68	68	67	66	66	65	64	63	62	61	60	59	58	57	57	58	57	54	51	51	50	50
Sun	50	50	50	50	50	50	50	50	50	49	49	49	48	48	48	48	48	49	49	49	49	48	48	48
Mon	48	48	48	48	47	48	48	48	48	48	48	48	48	48	48	49	49	54	57	59	58	57	54	51
Tue	52	52	53	53	54	55	56	56	57	57	58	59	61	62	70	75	83	87	91	93	92	91	89	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	93	88	84	82	79	79	79	79	79	79	78	78	78	78	77	77	81	84	85	85	82	81	79	76
Thu	72	70	70	70	70	69	69	69	69	68	68	68	68	68	69	71	73	79	83	85	88	88	87	84
Fri	81	76	72	70	70	70	70	71	71	71	72	72	72	72	75	78	80	83	86	86	84	82	78	72
Sat	69	68	68	68	67	66	66	65	64	63	62	61	60	59	58	57	57	58	57	54	51	51	50	50
Sun	50	50	50	50	50	50	50	50	50	49	49	49	48	48	48	48	48	49	49	49	49	48	48	48
Mon	48	48	48	48	47	48	48	48	48	48	48	48	48	48	48	49	49	54	57	59	58	57	54	51
Tue	52	52	53	53	54	55	56	56	57	57	58	59	61	62	70	75	83	87	91	93	92	91	89	83