8 – 14 Feb 2023 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

78.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 22.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-24 AQI compared with the previous week’s mean of 102.9.

Highest hourly estimate: 205 in Bangkok · 12 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, 8 Feb	79.6Moderate	47–166	23.3	192 / 192
Thu, 9 Feb	78.7Moderate	46–157	23.1	192 / 192
Fri, 10 Feb	78.4Moderate	49–135	21.3	192 / 192
Sat, 11 Feb	78Moderate	46–201	20.6	192 / 192
Sun, 12 Feb	77.9Moderate	50–205	20.5	192 / 192
Mon, 13 Feb	76.8Moderate	52–172	22.9	192 / 192
Tue, 14 Feb	82.7Moderate	53–182	26.4	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	73	73	74	75	75	75	75	76	76	77	77	77	77	77	79	85	91	96	94	91	86	80	78
Thu	78	77	77	77	77	77	76	76	77	77	77	77	77	77	80	83	85	87	88	84	78	76	77	77
Fri	77	77	78	78	78	78	78	78	78	78	77	77	77	77	78	81	83	86	86	82	79	76	74	74
Sat	73	73	73	72	72	72	71	71	71	71	71	71	71	71	72	84	91	95	97	94	92	88	82	75
Sun	72	72	72	72	72	71	71	72	71	71	71	71	71	71	73	84	91	95	99	95	90	86	81	77
Mon	72	72	72	73	73	73	73	73	74	74	74	74	74	75	75	75	79	84	89	90	88	85	79	76
Tue	76	76	77	77	77	77	77	77	78	78	79	79	80	80	80	84	88	87	93	96	96	94	92	88

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	106.8Unhealthy for Sensitive Groups	165	34.1	168 / 168
Bangkok	100.6Unhealthy for Sensitive Groups	205	26.7	168 / 168
Nakhon Ratchasima	89.5Moderate	110	29.3	168 / 168
Chiang Mai	88.9Moderate	157	27.7	168 / 168
Chiang Rai	86Moderate	117	30	168 / 168
Pattaya	54Moderate	60	11.2	168 / 168
Phuket	52.6Moderate	66	11.1	168 / 168
Hat Yai	52.6Moderate	54	10.3	168 / 168

City-hours by category

Good: 99

Moderate: 1037

Unhealthy for Sensitive Groups: 175

Unhealthy: 30

Very Unhealthy: 3

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	73	73	74	75	75	75	75	76	76	77	77	77	77	77	79	85	91	96	94	91	86	80	78
Thu	78	77	77	77	77	77	76	76	77	77	77	77	77	77	80	83	85	87	88	84	78	76	77	77
Fri	77	77	78	78	78	78	78	78	78	78	77	77	77	77	78	81	83	86	86	82	79	76	74	74
Sat	73	73	73	72	72	72	71	71	71	71	71	71	71	71	72	84	91	95	97	94	92	88	82	75
Sun	72	72	72	72	72	71	71	72	71	71	71	71	71	71	73	84	91	95	99	95	90	86	81	77
Mon	72	72	72	73	73	73	73	73	74	74	74	74	74	75	75	75	79	84	89	90	88	85	79	76
Tue	76	76	77	77	77	77	77	77	78	78	79	79	80	80	80	84	88	87	93	96	96	94	92	88

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	73	73	74	75	75	75	75	76	76	77	77	77	77	77	79	85	91	96	94	91	86	80	78
Thu	78	77	77	77	77	77	76	76	77	77	77	77	77	77	80	83	85	87	88	84	78	76	77	77
Fri	77	77	78	78	78	78	78	78	78	78	77	77	77	77	78	81	83	86	86	82	79	76	74	74
Sat	73	73	73	72	72	72	71	71	71	71	71	71	71	71	72	84	91	95	97	94	92	88	82	75
Sun	72	72	72	72	72	71	71	72	71	71	71	71	71	71	73	84	91	95	99	95	90	86	81	77
Mon	72	72	72	73	73	73	73	73	74	74	74	74	74	75	75	75	79	84	89	90	88	85	79	76
Tue	76	76	77	77	77	77	77	77	78	78	79	79	80	80	80	84	88	87	93	96	96	94	92	88

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	73	73	74	75	75	75	75	76	76	77	77	77	77	77	79	85	91	96	94	91	86	80	78
Thu	78	77	77	77	77	77	76	76	77	77	77	77	77	77	80	83	85	87	88	84	78	76	77	77
Fri	77	77	78	78	78	78	78	78	78	78	77	77	77	77	78	81	83	86	86	82	79	76	74	74
Sat	73	73	73	72	72	72	71	71	71	71	71	71	71	71	72	84	91	95	97	94	92	88	82	75
Sun	72	72	72	72	72	71	71	72	71	71	71	71	71	71	73	84	91	95	99	95	90	86	81	77
Mon	72	72	72	73	73	73	73	73	74	74	74	74	74	75	75	75	79	84	89	90	88	85	79	76
Tue	76	76	77	77	77	77	77	77	78	78	79	79	80	80	80	84	88	87	93	96	96	94	92	88