7 – 13 Feb 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

73.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 20.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-3 AQI compared with the previous week’s mean of 76.7.

Highest hourly estimate: 173 in Bangkok · 13 Feb, 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 Feb	73Moderate	55–118	20	192 / 192
Thu, 8 Feb	74Moderate	54–161	20.7	192 / 192
Fri, 9 Feb	69.4Moderate	52–97	17.8	192 / 192
Sat, 10 Feb	67.5Moderate	56–98	20.2	192 / 192
Sun, 11 Feb	77.3Moderate	52–140	23.7	192 / 192
Mon, 12 Feb	78.6Moderate	53–147	22.3	192 / 192
Tue, 13 Feb	76.3Moderate	54–173	19.2	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	72	72	72	73	73	73	73	73	73	73	73	73	73	73	73	72	73	77	78	76	73	71	71	71
Thu	71	71	71	71	72	72	72	72	72	72	72	72	72	72	72	73	78	84	85	83	80	76	73	73
Fri	72	72	72	72	71	71	71	70	70	69	69	68	68	68	68	67	68	71	71	69	68	67	67	67
Sat	67	66	66	66	66	66	66	66	66	66	66	65	65	65	66	66	67	68	71	72	73	73	71	71
Sun	71	72	72	73	73	74	74	75	75	76	77	77	78	78	78	78	78	80	84	86	86	83	79	78
Mon	78	78	78	77	77	77	76	76	76	76	76	77	76	76	76	76	77	83	87	87	86	84	80	76
Tue	75	75	75	75	75	75	75	74	74	73	73	72	72	71	70	72	75	81	85	86	86	83	80	80

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	86.3Moderate	173	26.7	168 / 168
Chiang Mai	84.9Moderate	134	27.3	168 / 168
Chiang Rai	80.3Moderate	105	25.3	168 / 168
Khon Kaen	80.3Moderate	161	23.2	168 / 168
Nakhon Ratchasima	77.3Moderate	123	21.3	168 / 168
Pattaya	66.1Moderate	149	15.4	168 / 168
Phuket	57.7Moderate	72	12.4	168 / 168
Hat Yai	57Moderate	60	12.9	168 / 168

City-hours by category

Good: 0

Moderate: 1232

Unhealthy for Sensitive Groups: 105

Unhealthy: 7

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	72	72	72	73	73	73	73	73	73	73	73	73	73	73	73	72	73	77	78	76	73	71	71	71
Thu	71	71	71	71	72	72	72	72	72	72	72	72	72	72	72	73	78	84	85	83	80	76	73	73
Fri	72	72	72	72	71	71	71	70	70	69	69	68	68	68	68	67	68	71	71	69	68	67	67	67
Sat	67	66	66	66	66	66	66	66	66	66	66	65	65	65	66	66	67	68	71	72	73	73	71	71
Sun	71	72	72	73	73	74	74	75	75	76	77	77	78	78	78	78	78	80	84	86	86	83	79	78
Mon	78	78	78	77	77	77	76	76	76	76	76	77	76	76	76	76	77	83	87	87	86	84	80	76
Tue	75	75	75	75	75	75	75	74	74	73	73	72	72	71	70	72	75	81	85	86	86	83	80	80

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	72	72	72	73	73	73	73	73	73	73	73	73	73	73	73	72	73	77	78	76	73	71	71	71
Thu	71	71	71	71	72	72	72	72	72	72	72	72	72	72	72	73	78	84	85	83	80	76	73	73
Fri	72	72	72	72	71	71	71	70	70	69	69	68	68	68	68	67	68	71	71	69	68	67	67	67
Sat	67	66	66	66	66	66	66	66	66	66	66	65	65	65	66	66	67	68	71	72	73	73	71	71
Sun	71	72	72	73	73	74	74	75	75	76	77	77	78	78	78	78	78	80	84	86	86	83	79	78
Mon	78	78	78	77	77	77	76	76	76	76	76	77	76	76	76	76	77	83	87	87	86	84	80	76
Tue	75	75	75	75	75	75	75	74	74	73	73	72	72	71	70	72	75	81	85	86	86	83	80	80

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	72	72	72	73	73	73	73	73	73	73	73	73	73	73	73	72	73	77	78	76	73	71	71	71
Thu	71	71	71	71	72	72	72	72	72	72	72	72	72	72	72	73	78	84	85	83	80	76	73	73
Fri	72	72	72	72	71	71	71	70	70	69	69	68	68	68	68	67	68	71	71	69	68	67	67	67
Sat	67	66	66	66	66	66	66	66	66	66	66	65	65	65	66	66	67	68	71	72	73	73	71	71
Sun	71	72	72	73	73	74	74	75	75	76	77	77	78	78	78	78	78	80	84	86	86	83	79	78
Mon	78	78	78	77	77	77	76	76	76	76	76	77	76	76	76	76	77	83	87	87	86	84	80	76
Tue	75	75	75	75	75	75	75	74	74	73	73	72	72	71	70	72	75	81	85	86	86	83	80	80