18 – 24 Mar 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

74.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 20.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-2.6 AQI compared with the previous week’s mean of 77.

Highest hourly estimate: 161 in Hue · 24 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, 18 Mar	70.2Moderate	54–119	19.8	192 / 192
Thu, 19 Mar	78.3Moderate	58–129	22.3	192 / 192
Fri, 20 Mar	76.7Moderate	57–151	22.6	192 / 192
Sat, 21 Mar	78.7Moderate	57–105	23.5	192 / 192
Sun, 22 Mar	73.3Moderate	50–110	18.3	192 / 192
Mon, 23 Mar	70.2Moderate	48–122	19	192 / 192
Tue, 24 Mar	73.5Moderate	51–161	19.9	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	64	64	64	65	65	65	65	66	66	67	67	67	67	68	69	74	79	84	85	83	78	73	70	70
Thu	70	71	72	72	73	74	75	76	76	76	77	77	76	76	78	83	88	92	93	90	85	79	75	75
Fri	75	75	74	74	74	73	72	72	72	72	72	72	72	73	74	80	85	89	90	87	83	79	76	75
Sat	76	76	76	77	77	78	78	79	79	79	79	79	79	79	79	79	82	83	84	81	78	78	77	78
Sun	77	77	77	76	76	75	75	75	74	73	73	73	72	72	71	71	74	75	76	74	71	69	68	68
Mon	68	68	67	67	67	67	67	67	67	67	67	67	67	68	68	70	76	82	83	80	76	72	69	69
Tue	69	69	69	69	69	69	69	69	69	69	69	69	69	70	70	77	84	88	89	87	82	77	73	71

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	91.9Moderate	109	31.7	168 / 168
Can Tho	86.3Moderate	103	28.6	168 / 168
Hue	84.1Moderate	161	21.7	168 / 168
Hai Phong	75.9Moderate	93	23.1	168 / 168
Da Nang	70.3Moderate	119	16.3	168 / 168
Nha Trang	66.6Moderate	74	17.8	168 / 168
Ho Chi Minh City	62.7Moderate	91	14.4	168 / 168
Da Lat	57.6Moderate	81	12.3	168 / 168

City-hours by category

Good: 26

Moderate: 1235

Unhealthy for Sensitive Groups: 79

Unhealthy: 4

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	64	64	64	65	65	65	65	66	66	67	67	67	67	68	69	74	79	84	85	83	78	73	70	70
Thu	70	71	72	72	73	74	75	76	76	76	77	77	76	76	78	83	88	92	93	90	85	79	75	75
Fri	75	75	74	74	74	73	72	72	72	72	72	72	72	73	74	80	85	89	90	87	83	79	76	75
Sat	76	76	76	77	77	78	78	79	79	79	79	79	79	79	79	79	82	83	84	81	78	78	77	78
Sun	77	77	77	76	76	75	75	75	74	73	73	73	72	72	71	71	74	75	76	74	71	69	68	68
Mon	68	68	67	67	67	67	67	67	67	67	67	67	67	68	68	70	76	82	83	80	76	72	69	69
Tue	69	69	69	69	69	69	69	69	69	69	69	69	69	70	70	77	84	88	89	87	82	77	73	71

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	64	64	64	65	65	65	65	66	66	67	67	67	67	68	69	74	79	84	85	83	78	73	70	70
Thu	70	71	72	72	73	74	75	76	76	76	77	77	76	76	78	83	88	92	93	90	85	79	75	75
Fri	75	75	74	74	74	73	72	72	72	72	72	72	72	73	74	80	85	89	90	87	83	79	76	75
Sat	76	76	76	77	77	78	78	79	79	79	79	79	79	79	79	79	82	83	84	81	78	78	77	78
Sun	77	77	77	76	76	75	75	75	74	73	73	73	72	72	71	71	74	75	76	74	71	69	68	68
Mon	68	68	67	67	67	67	67	67	67	67	67	67	67	68	68	70	76	82	83	80	76	72	69	69
Tue	69	69	69	69	69	69	69	69	69	69	69	69	69	70	70	77	84	88	89	87	82	77	73	71

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	64	64	64	65	65	65	65	66	66	67	67	67	67	68	69	74	79	84	85	83	78	73	70	70
Thu	70	71	72	72	73	74	75	76	76	76	77	77	76	76	78	83	88	92	93	90	85	79	75	75
Fri	75	75	74	74	74	73	72	72	72	72	72	72	72	73	74	80	85	89	90	87	83	79	76	75
Sat	76	76	76	77	77	78	78	79	79	79	79	79	79	79	79	79	82	83	84	81	78	78	77	78
Sun	77	77	77	76	76	75	75	75	74	73	73	73	72	72	71	71	74	75	76	74	71	69	68	68
Mon	68	68	67	67	67	67	67	67	67	67	67	67	67	68	68	70	76	82	83	80	76	72	69	69
Tue	69	69	69	69	69	69	69	69	69	69	69	69	69	70	70	77	84	88	89	87	82	77	73	71