7 – 13 Jan 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

99Weekly mean modelled AQI · Moderate

Mean PM2.5: 36 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+24.2 AQI compared with the previous week’s mean of 74.8.

Highest hourly estimate: 193 in Hanoi · 13 Jan, 20:00 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 Jan	76.8Moderate	43–134	27.8	192 / 192
Thu, 8 Jan	92.1Moderate	53–159	31.2	192 / 192
Fri, 9 Jan	98.6Moderate	55–190	37.1	192 / 192
Sat, 10 Jan	104.2Unhealthy for Sensitive Groups	53–185	38.6	192 / 192
Sun, 11 Jan	113.4Unhealthy for Sensitive Groups	51–187	43.8	192 / 192
Mon, 12 Jan	106.6Unhealthy for Sensitive Groups	52–183	35.7	192 / 192
Tue, 13 Jan	101Unhealthy for Sensitive Groups	53–193	37.6	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	72	71	71	71	72	72	73	73	74	75	76	76	76	76	77	77	78	79	80	82	83	85	86	87
Thu	88	89	90	90	90	91	91	91	92	92	92	92	92	92	92	93	93	93	95	96	96	95	95	94
Fri	95	94	94	95	95	96	96	97	97	98	98	99	99	100	100	100	101	101	102	104	102	102	102	101
Sat	101	101	101	101	101	101	102	102	102	102	102	103	103	103	104	105	107	108	109	109	109	109	108	108
Sun	108	108	109	110	110	111	111	112	112	113	114	114	114	115	114	115	116	116	118	118	117	116	116	116
Mon	115	115	114	113	112	112	110	108	106	105	104	104	103	103	102	103	104	106	107	106	105	102	101	99
Tue	99	99	99	99	99	99	99	99	99	99	100	100	100	99	99	100	101	103	108	110	108	105	103	102

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
Hanoi	163.5Unhealthy	193	87.2	168 / 168
Can Tho	126.2Unhealthy for Sensitive Groups	172	49	168 / 168
Ho Chi Minh City	110.9Unhealthy for Sensitive Groups	151	39.4	168 / 168
Hai Phong	109.6Unhealthy for Sensitive Groups	151	40.4	168 / 168
Da Nang	83.9Moderate	112	19.4	168 / 168
Hue	80.2Moderate	93	25.2	168 / 168
Nha Trang	63.4Moderate	71	15.9	168 / 168
Da Lat	54.1Moderate	60	11.4	168 / 168

City-hours by category

Good: 12

Moderate: 838

Unhealthy for Sensitive Groups: 276

Unhealthy: 218

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 Centre for Environmental Monitoring. 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	71	71	71	72	72	73	73	74	75	76	76	76	76	77	77	78	79	80	82	83	85	86	87
Thu	88	89	90	90	90	91	91	91	92	92	92	92	92	92	92	93	93	93	95	96	96	95	95	94
Fri	95	94	94	95	95	96	96	97	97	98	98	99	99	100	100	100	101	101	102	104	102	102	102	101
Sat	101	101	101	101	101	101	102	102	102	102	102	103	103	103	104	105	107	108	109	109	109	109	108	108
Sun	108	108	109	110	110	111	111	112	112	113	114	114	114	115	114	115	116	116	118	118	117	116	116	116
Mon	115	115	114	113	112	112	110	108	106	105	104	104	103	103	102	103	104	106	107	106	105	102	101	99
Tue	99	99	99	99	99	99	99	99	99	99	100	100	100	99	99	100	101	103	108	110	108	105	103	102

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	71	71	71	72	72	73	73	74	75	76	76	76	76	77	77	78	79	80	82	83	85	86	87
Thu	88	89	90	90	90	91	91	91	92	92	92	92	92	92	92	93	93	93	95	96	96	95	95	94
Fri	95	94	94	95	95	96	96	97	97	98	98	99	99	100	100	100	101	101	102	104	102	102	102	101
Sat	101	101	101	101	101	101	102	102	102	102	102	103	103	103	104	105	107	108	109	109	109	109	108	108
Sun	108	108	109	110	110	111	111	112	112	113	114	114	114	115	114	115	116	116	118	118	117	116	116	116
Mon	115	115	114	113	112	112	110	108	106	105	104	104	103	103	102	103	104	106	107	106	105	102	101	99
Tue	99	99	99	99	99	99	99	99	99	99	100	100	100	99	99	100	101	103	108	110	108	105	103	102

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	71	71	71	72	72	73	73	74	75	76	76	76	76	77	77	78	79	80	82	83	85	86	87
Thu	88	89	90	90	90	91	91	91	92	92	92	92	92	92	92	93	93	93	95	96	96	95	95	94
Fri	95	94	94	95	95	96	96	97	97	98	98	99	99	100	100	100	101	101	102	104	102	102	102	101
Sat	101	101	101	101	101	101	102	102	102	102	102	103	103	103	104	105	107	108	109	109	109	109	108	108
Sun	108	108	109	110	110	111	111	112	112	113	114	114	114	115	114	115	116	116	118	118	117	116	116	116
Mon	115	115	114	113	112	112	110	108	106	105	104	104	103	103	102	103	104	106	107	106	105	102	101	99
Tue	99	99	99	99	99	99	99	99	99	99	100	100	100	99	99	100	101	103	108	110	108	105	103	102