7 – 13 Jun 2023 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

50.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 10.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-6.3 AQI compared with the previous week’s mean of 56.9.

Highest hourly estimate: 135 in Hat Yai · 12 Jun, 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, 7 Jun	49.7Good	27–68	9.5	192 / 192
Thu, 8 Jun	49.2Good	21–113	10.1	192 / 192
Fri, 9 Jun	50.4Moderate	18–71	11	192 / 192
Sat, 10 Jun	50.8Moderate	19–68	10.6	192 / 192
Sun, 11 Jun	49Good	18–72	9.7	192 / 192
Mon, 12 Jun	51.2Moderate	19–135	11.2	192 / 192
Tue, 13 Jun	53.9Moderate	26–104	10.7	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	53	52	52	51	51	51	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49
Thu	49	48	48	48	47	47	47	47	47	47	47	47	47	47	47	47	50	52	54	55	54	54	53	52
Fri	51	50	49	49	49	49	49	50	50	50	50	50	51	51	51	51	52	51	51	51	51	51	51	51
Sat	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	50	50
Sun	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	48	48	48
Mon	47	47	47	46	46	46	46	46	46	46	46	46	47	47	47	49	54	59	62	63	63	62	61	59
Tue	56	52	53	53	53	53	53	54	53	53	53	53	53	53	53	53	54	56	57	57	56	55	54	52

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
Chiang Mai	62.1Moderate	72	15	168 / 168
Khon Kaen	59.6Moderate	91	13.1	168 / 168
Hat Yai	58.3Moderate	135	12.9	168 / 168
Chiang Rai	51.2Moderate	59	10.2	168 / 168
Phuket	50.6Moderate	58	10	168 / 168
Bangkok	49.8Good	52	8.9	168 / 168
Nakhon Ratchasima	49.7Good	78	9	168 / 168
Pattaya	23.4Good	29	4	168 / 168

City-hours by category

Good: 544

Moderate: 788

Unhealthy for Sensitive Groups: 12

Unhealthy: 0

Very Unhealthy: 0

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	53	52	52	51	51	51	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49
Thu	49	48	48	48	47	47	47	47	47	47	47	47	47	47	47	47	50	52	54	55	54	54	53	52
Fri	51	50	49	49	49	49	49	50	50	50	50	50	51	51	51	51	52	51	51	51	51	51	51	51
Sat	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	50	50
Sun	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	48	48	48
Mon	47	47	47	46	46	46	46	46	46	46	46	46	47	47	47	49	54	59	62	63	63	62	61	59
Tue	56	52	53	53	53	53	53	54	53	53	53	53	53	53	53	53	54	56	57	57	56	55	54	52

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	53	52	52	51	51	51	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49
Thu	49	48	48	48	47	47	47	47	47	47	47	47	47	47	47	47	50	52	54	55	54	54	53	52
Fri	51	50	49	49	49	49	49	50	50	50	50	50	51	51	51	51	52	51	51	51	51	51	51	51
Sat	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	50	50
Sun	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	48	48	48
Mon	47	47	47	46	46	46	46	46	46	46	46	46	47	47	47	49	54	59	62	63	63	62	61	59
Tue	56	52	53	53	53	53	53	54	53	53	53	53	53	53	53	53	54	56	57	57	56	55	54	52

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	53	52	52	51	51	51	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49
Thu	49	48	48	48	47	47	47	47	47	47	47	47	47	47	47	47	50	52	54	55	54	54	53	52
Fri	51	50	49	49	49	49	49	50	50	50	50	50	51	51	51	51	52	51	51	51	51	51	51	51
Sat	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	50	50
Sun	50	50	50	50	50	50	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	48	48	48
Mon	47	47	47	46	46	46	46	46	46	46	46	46	47	47	47	49	54	59	62	63	63	62	61	59
Tue	56	52	53	53	53	53	53	54	53	53	53	53	53	53	53	53	54	56	57	57	56	55	54	52