14 – 20 Jun 2023 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

49.9Weekly mean modelled AQI · Good

Mean PM2.5: 10.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-0.7 AQI compared with the previous week’s mean of 50.6.

Highest hourly estimate: 102 in Bangkok · 20 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, 14 Jun	46Good	27–67	8.5	192 / 192
Thu, 15 Jun	46.3Good	22–61	9.6	192 / 192
Fri, 16 Jun	51.8Moderate	23–70	11.6	192 / 192
Sat, 17 Jun	52.3Moderate	29–62	10.7	192 / 192
Sun, 18 Jun	49.4Good	25–58	9.2	192 / 192
Mon, 19 Jun	48.7Good	24–59	10.8	192 / 192
Tue, 20 Jun	54.7Moderate	34–102	11.6	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	51	50	50	49	49	48	47	46	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	44
Thu	44	44	44	45	45	46	46	46	47	47	47	47	47	47	47	46	46	46	47	47	47	47	48	49
Fri	49	49	50	50	50	50	51	51	51	52	52	52	52	53	53	53	53	54	54	53	53	53	54	54
Sat	53	53	53	53	53	53	53	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52
Sun	51	51	51	51	51	51	50	50	50	50	50	50	49	49	49	49	49	49	48	48	48	48	48	47
Mon	47	47	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	50	50	50	51	52	52	52
Tue	53	53	53	54	54	54	54	54	54	54	54	54	54	54	54	54	55	58	61	60	57	55	54	54

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	56.1Moderate	83	12.3	168 / 168
Bangkok	54.5Moderate	102	12.1	168 / 168
Hat Yai	54.3Moderate	67	10.9	168 / 168
Chiang Mai	54Moderate	62	11.5	168 / 168
Phuket	52.2Moderate	58	9.9	168 / 168
Chiang Rai	50Good	57	9.9	168 / 168
Nakhon Ratchasima	48.3Good	62	10.1	168 / 168
Pattaya	29.6Good	42	5.4	168 / 168

City-hours by category

Good: 454

Moderate: 889

Unhealthy for Sensitive Groups: 1

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	51	50	50	49	49	48	47	46	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	44
Thu	44	44	44	45	45	46	46	46	47	47	47	47	47	47	47	46	46	46	47	47	47	47	48	49
Fri	49	49	50	50	50	50	51	51	51	52	52	52	52	53	53	53	53	54	54	53	53	53	54	54
Sat	53	53	53	53	53	53	53	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52
Sun	51	51	51	51	51	51	50	50	50	50	50	50	49	49	49	49	49	49	48	48	48	48	48	47
Mon	47	47	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	50	50	50	51	52	52	52
Tue	53	53	53	54	54	54	54	54	54	54	54	54	54	54	54	54	55	58	61	60	57	55	54	54

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	51	50	50	49	49	48	47	46	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	44
Thu	44	44	44	45	45	46	46	46	47	47	47	47	47	47	47	46	46	46	47	47	47	47	48	49
Fri	49	49	50	50	50	50	51	51	51	52	52	52	52	53	53	53	53	54	54	53	53	53	54	54
Sat	53	53	53	53	53	53	53	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52
Sun	51	51	51	51	51	51	50	50	50	50	50	50	49	49	49	49	49	49	48	48	48	48	48	47
Mon	47	47	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	50	50	50	51	52	52	52
Tue	53	53	53	54	54	54	54	54	54	54	54	54	54	54	54	54	55	58	61	60	57	55	54	54

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	51	50	50	49	49	48	47	46	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	44
Thu	44	44	44	45	45	46	46	46	47	47	47	47	47	47	47	46	46	46	47	47	47	47	48	49
Fri	49	49	50	50	50	50	51	51	51	52	52	52	52	53	53	53	53	54	54	53	53	53	54	54
Sat	53	53	53	53	53	53	53	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52
Sun	51	51	51	51	51	51	50	50	50	50	50	50	49	49	49	49	49	49	48	48	48	48	48	47
Mon	47	47	47	47	47	47	47	48	48	48	48	48	49	49	49	49	49	50	50	50	51	52	52	52
Tue	53	53	53	54	54	54	54	54	54	54	54	54	54	54	54	54	55	58	61	60	57	55	54	54