17 – 23 Jun 2026 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

53.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 11.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+6.1 AQI compared with the previous week’s mean of 47.

Highest hourly estimate: 80 in Bangkok · 21 Jun, 18:00 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, 17 Jun	53.2Moderate	37–75	11	192 / 192
Thu, 18 Jun	52.8Moderate	29–74	11	192 / 192
Fri, 19 Jun	52.6Moderate	29–67	13.1	192 / 192
Sat, 20 Jun	54.5Moderate	28–68	11.1	192 / 192
Sun, 21 Jun	51.8Moderate	21–80	11.5	192 / 192
Mon, 22 Jun	49.8Good	19–74	12	192 / 192
Tue, 23 Jun	56.9Moderate	38–74	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	54	54	54	54	54	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Thu	51	51	52	52	52	52	51	51	52	52	52	52	52	52	53	53	54	56	57	56	55	54	53	52
Fri	51	51	51	51	51	51	51	51	51	52	52	52	53	53	53	53	54	54	54	54	54	55	56	56
Sat	56	56	56	56	56	56	56	57	56	56	55	55	54	54	54	53	53	54	54	54	52	52	52	51
Sun	51	51	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	53	54	54	52	51	50	50
Mon	49	49	49	48	48	47	48	48	48	48	48	48	49	49	49	50	50	51	51	52	53	54	54	55
Tue	56	56	56	57	57	57	57	57	58	58	58	58	58	58	58	58	58	57	57	57	56	56	55	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
Bangkok	64.6Moderate	80	16.2	168 / 168
Nakhon Ratchasima	64Moderate	77	16.5	168 / 168
Khon Kaen	61.6Moderate	73	15.2	168 / 168
Chiang Mai	54.3Moderate	64	11.5	168 / 168
Chiang Rai	52.6Moderate	58	10.4	168 / 168
Hat Yai	50.6Moderate	74	9.6	168 / 168
Phuket	39.3Good	51	6.8	168 / 168
Pattaya	37.6Good	54	6.8	168 / 168

City-hours by category

Good: 428

Moderate: 916

Unhealthy for Sensitive Groups: 0

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	54	54	54	54	54	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Thu	51	51	52	52	52	52	51	51	52	52	52	52	52	52	53	53	54	56	57	56	55	54	53	52
Fri	51	51	51	51	51	51	51	51	51	52	52	52	53	53	53	53	54	54	54	54	54	55	56	56
Sat	56	56	56	56	56	56	56	57	56	56	55	55	54	54	54	53	53	54	54	54	52	52	52	51
Sun	51	51	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	53	54	54	52	51	50	50
Mon	49	49	49	48	48	47	48	48	48	48	48	48	49	49	49	50	50	51	51	52	53	54	54	55
Tue	56	56	56	57	57	57	57	57	58	58	58	58	58	58	58	58	58	57	57	57	56	56	55	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	54	54	54	54	54	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Thu	51	51	52	52	52	52	51	51	52	52	52	52	52	52	53	53	54	56	57	56	55	54	53	52
Fri	51	51	51	51	51	51	51	51	51	52	52	52	53	53	53	53	54	54	54	54	54	55	56	56
Sat	56	56	56	56	56	56	56	57	56	56	55	55	54	54	54	53	53	54	54	54	52	52	52	51
Sun	51	51	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	53	54	54	52	51	50	50
Mon	49	49	49	48	48	47	48	48	48	48	48	48	49	49	49	50	50	51	51	52	53	54	54	55
Tue	56	56	56	57	57	57	57	57	58	58	58	58	58	58	58	58	58	57	57	57	56	56	55	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	54	54	54	54	54	54	54	54	54	53	53	53	53	53	53	53	53	53	53	53	52	52	52	51
Thu	51	51	52	52	52	52	51	51	52	52	52	52	52	52	53	53	54	56	57	56	55	54	53	52
Fri	51	51	51	51	51	51	51	51	51	52	52	52	53	53	53	53	54	54	54	54	54	55	56	56
Sat	56	56	56	56	56	56	56	57	56	56	55	55	54	54	54	53	53	54	54	54	52	52	52	51
Sun	51	51	52	52	52	52	52	52	52	52	52	52	52	52	52	52	52	53	54	54	52	51	50	50
Mon	49	49	49	48	48	47	48	48	48	48	48	48	49	49	49	50	50	51	51	52	53	54	54	55
Tue	56	56	56	57	57	57	57	57	58	58	58	58	58	58	58	58	58	57	57	57	56	56	55	54