11 – 17 Jun 2025 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

52.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 11.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-7.5 AQI compared with the previous week’s mean of 60.

Highest hourly estimate: 102 in Hat Yai · 15 Jun, 17:00 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, 11 Jun	56.7Moderate	26–82	12.1	192 / 192
Thu, 12 Jun	54.7Moderate	19–87	13.1	192 / 192
Fri, 13 Jun	52.6Moderate	18–85	11.7	192 / 192
Sat, 14 Jun	50.4Moderate	18–97	12.4	192 / 192
Sun, 15 Jun	51.8Moderate	17–102	11.7	192 / 192
Mon, 16 Jun	48.8Good	17–78	10.2	192 / 192
Tue, 17 Jun	52.2Moderate	24–63	11.8	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	57	57	57	58	58	58	58	58	58	58	58	57	57	57	57	56	56	57	57	57	55	54	54	54
Thu	54	54	53	53	54	54	54	54	55	55	55	55	55	56	56	56	56	56	56	56	55	55	55	55
Fri	55	55	54	54	54	53	53	52	52	52	52	52	52	52	52	52	52	52	53	53	52	52	52	52
Sat	52	51	51	51	50	50	50	50	49	49	49	49	50	50	50	50	51	52	52	51	51	51	51	51
Sun	51	51	51	51	52	52	52	52	52	52	52	51	51	51	51	52	52	54	54	52	52	52	51	51
Mon	51	51	51	50	50	49	49	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	50
Tue	50	50	51	51	51	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53

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
Hat Yai	66Moderate	102	17.4	168 / 168
Khon Kaen	62.5Moderate	87	15.3	168 / 168
Chiang Rai	58.5Moderate	74	13.4	168 / 168
Chiang Mai	56Moderate	64	12.6	168 / 168
Phuket	53Moderate	73	11.4	168 / 168
Nakhon Ratchasima	52.1Moderate	68	11.3	168 / 168
Bangkok	46.3Good	63	9.6	168 / 168
Pattaya	24.9Good	51	3.7	168 / 168

City-hours by category

Good: 432

Moderate: 911

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	57	57	57	58	58	58	58	58	58	58	58	57	57	57	57	56	56	57	57	57	55	54	54	54
Thu	54	54	53	53	54	54	54	54	55	55	55	55	55	56	56	56	56	56	56	56	55	55	55	55
Fri	55	55	54	54	54	53	53	52	52	52	52	52	52	52	52	52	52	52	53	53	52	52	52	52
Sat	52	51	51	51	50	50	50	50	49	49	49	49	50	50	50	50	51	52	52	51	51	51	51	51
Sun	51	51	51	51	52	52	52	52	52	52	52	51	51	51	51	52	52	54	54	52	52	52	51	51
Mon	51	51	51	50	50	49	49	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	50
Tue	50	50	51	51	51	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53

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	57	57	57	58	58	58	58	58	58	58	58	57	57	57	57	56	56	57	57	57	55	54	54	54
Thu	54	54	53	53	54	54	54	54	55	55	55	55	55	56	56	56	56	56	56	56	55	55	55	55
Fri	55	55	54	54	54	53	53	52	52	52	52	52	52	52	52	52	52	52	53	53	52	52	52	52
Sat	52	51	51	51	50	50	50	50	49	49	49	49	50	50	50	50	51	52	52	51	51	51	51	51
Sun	51	51	51	51	52	52	52	52	52	52	52	51	51	51	51	52	52	54	54	52	52	52	51	51
Mon	51	51	51	50	50	49	49	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	50
Tue	50	50	51	51	51	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53

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	57	57	57	58	58	58	58	58	58	58	58	57	57	57	57	56	56	57	57	57	55	54	54	54
Thu	54	54	53	53	54	54	54	54	55	55	55	55	55	56	56	56	56	56	56	56	55	55	55	55
Fri	55	55	54	54	54	53	53	52	52	52	52	52	52	52	52	52	52	52	53	53	52	52	52	52
Sat	52	51	51	51	50	50	50	50	49	49	49	49	50	50	50	50	51	52	52	51	51	51	51	51
Sun	51	51	51	51	52	52	52	52	52	52	52	51	51	51	51	52	52	54	54	52	52	52	51	51
Mon	51	51	51	50	50	49	49	49	49	49	49	48	48	48	48	48	48	48	48	48	48	49	49	50
Tue	50	50	51	51	51	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53	53	53	53