25 Feb – 3 Mar 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

78.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 23 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+5.2 AQI compared with the previous week’s mean of 73.5.

Highest hourly estimate: 199 in Da Nang · 1 Mar, 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, 25 Feb	73Moderate	55–101	22.1	192 / 192
Thu, 26 Feb	78Moderate	51–139	23.2	192 / 192
Fri, 27 Feb	72.9Moderate	43–137	20.9	192 / 192
Sat, 28 Feb	78.6Moderate	52–151	21	192 / 192
Sun, 1 Mar	82.1Moderate	54–199	23	192 / 192
Mon, 2 Mar	83.5Moderate	59–190	24.9	192 / 192
Tue, 3 Mar	83.1Moderate	58–161	25.6	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	69	69	69	70	70	71	71	72	72	73	73	73	73	73	73	74	75	77	79	78	76	74	74	75
Thu	75	75	75	76	77	77	77	77	77	78	78	78	79	79	79	79	79	80	81	79	79	79	79	79
Fri	78	77	77	76	75	74	73	72	72	72	71	71	71	71	71	71	71	72	72	72	73	73	73	73
Sat	73	73	74	74	74	75	75	76	76	76	76	75	75	75	75	79	86	91	94	92	88	83	77	73
Sun	73	73	73	73	73	73	73	73	73	73	73	74	74	74	79	86	94	103	108	108	103	97	88	81
Mon	77	77	77	77	77	77	77	77	78	78	78	78	79	79	81	88	94	98	101	100	97	90	85	82
Tue	80	80	80	80	80	81	81	81	81	81	81	80	80	80	80	83	90	93	93	92	89	84	81	81

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	112.3Unhealthy for Sensitive Groups	167	39.6	168 / 168
Can Tho	90.8Moderate	126	31.5	168 / 168
Da Nang	85Moderate	199	21.3	168 / 168
Hue	79.9Moderate	152	21.4	168 / 168
Hai Phong	77.5Moderate	109	24	168 / 168
Ho Chi Minh City	66.2Moderate	76	18	168 / 168
Nha Trang	59.9Moderate	66	14	168 / 168
Da Lat	58.2Moderate	72	13.9	168 / 168

City-hours by category

Good: 18

Moderate: 1077

Unhealthy for Sensitive Groups: 227

Unhealthy: 22

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	69	69	69	70	70	71	71	72	72	73	73	73	73	73	73	74	75	77	79	78	76	74	74	75
Thu	75	75	75	76	77	77	77	77	77	78	78	78	79	79	79	79	79	80	81	79	79	79	79	79
Fri	78	77	77	76	75	74	73	72	72	72	71	71	71	71	71	71	71	72	72	72	73	73	73	73
Sat	73	73	74	74	74	75	75	76	76	76	76	75	75	75	75	79	86	91	94	92	88	83	77	73
Sun	73	73	73	73	73	73	73	73	73	73	73	74	74	74	79	86	94	103	108	108	103	97	88	81
Mon	77	77	77	77	77	77	77	77	78	78	78	78	79	79	81	88	94	98	101	100	97	90	85	82
Tue	80	80	80	80	80	81	81	81	81	81	81	80	80	80	80	83	90	93	93	92	89	84	81	81

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	69	69	69	70	70	71	71	72	72	73	73	73	73	73	73	74	75	77	79	78	76	74	74	75
Thu	75	75	75	76	77	77	77	77	77	78	78	78	79	79	79	79	79	80	81	79	79	79	79	79
Fri	78	77	77	76	75	74	73	72	72	72	71	71	71	71	71	71	71	72	72	72	73	73	73	73
Sat	73	73	74	74	74	75	75	76	76	76	76	75	75	75	75	79	86	91	94	92	88	83	77	73
Sun	73	73	73	73	73	73	73	73	73	73	73	74	74	74	79	86	94	103	108	108	103	97	88	81
Mon	77	77	77	77	77	77	77	77	78	78	78	78	79	79	81	88	94	98	101	100	97	90	85	82
Tue	80	80	80	80	80	81	81	81	81	81	81	80	80	80	80	83	90	93	93	92	89	84	81	81

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	69	69	69	70	70	71	71	72	72	73	73	73	73	73	73	74	75	77	79	78	76	74	74	75
Thu	75	75	75	76	77	77	77	77	77	78	78	78	79	79	79	79	79	80	81	79	79	79	79	79
Fri	78	77	77	76	75	74	73	72	72	72	71	71	71	71	71	71	71	72	72	72	73	73	73	73
Sat	73	73	74	74	74	75	75	76	76	76	76	75	75	75	75	79	86	91	94	92	88	83	77	73
Sun	73	73	73	73	73	73	73	73	73	73	73	74	74	74	79	86	94	103	108	108	103	97	88	81
Mon	77	77	77	77	77	77	77	77	78	78	78	78	79	79	81	88	94	98	101	100	97	90	85	82
Tue	80	80	80	80	80	81	81	81	81	81	81	80	80	80	80	83	90	93	93	92	89	84	81	81