6 – 12 May 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

82.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 23.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-9.9 AQI compared with the previous week’s mean of 92.4.

Highest hourly estimate: 176 in Da Nang · 11 May, 17:00 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, 6 May	82.8Moderate	51–159	22.2	192 / 192
Thu, 7 May	79.4Moderate	53–160	22.7	192 / 192
Fri, 8 May	85.1Moderate	56–173	23.7	192 / 192
Sat, 9 May	84.2Moderate	55–138	26.3	192 / 192
Sun, 10 May	83.8Moderate	53–161	24.9	192 / 192
Mon, 11 May	84.6Moderate	53–176	24.3	192 / 192
Tue, 12 May	77.5Moderate	57–155	23.1	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	79	79	79	79	79	79	78	77	77	77	77	78	79	83	87	93	97	99	99	94	87	80	76	75
Thu	75	75	75	75	74	73	73	72	72	72	73	73	75	78	84	90	94	96	95	91	86	81	78	76
Fri	77	77	77	78	78	79	79	80	80	80	80	80	81	84	88	93	97	102	104	103	96	89	81	79
Sat	79	80	80	80	81	81	81	81	81	82	82	82	82	82	85	88	90	93	94	93	89	87	85	85
Sun	85	85	84	84	84	84	84	83	83	83	83	83	82	82	85	87	88	88	88	86	82	80	81	81
Mon	80	80	80	81	81	81	81	81	82	82	82	81	82	85	89	93	95	95	96	93	89	84	80	80
Tue	79	79	79	78	77	77	76	75	74	73	73	72	72	72	74	78	83	86	86	85	81	79	77	77

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	127.6Unhealthy for Sensitive Groups	174	47.2	168 / 168
Can Tho	111.4Unhealthy for Sensitive Groups	140	41	168 / 168
Da Nang	81.6Moderate	176	15.9	168 / 168
Hai Phong	80.3Moderate	121	23.8	168 / 168
Hue	73.9Moderate	152	17.9	168 / 168
Ho Chi Minh City	65.7Moderate	78	17.2	168 / 168
Nha Trang	60.7Moderate	68	14.4	168 / 168
Da Lat	58.6Moderate	64	13.7	168 / 168

City-hours by category

Good: 0

Moderate: 1004

Unhealthy for Sensitive Groups: 287

Unhealthy: 53

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	79	79	79	79	79	79	78	77	77	77	77	78	79	83	87	93	97	99	99	94	87	80	76	75
Thu	75	75	75	75	74	73	73	72	72	72	73	73	75	78	84	90	94	96	95	91	86	81	78	76
Fri	77	77	77	78	78	79	79	80	80	80	80	80	81	84	88	93	97	102	104	103	96	89	81	79
Sat	79	80	80	80	81	81	81	81	81	82	82	82	82	82	85	88	90	93	94	93	89	87	85	85
Sun	85	85	84	84	84	84	84	83	83	83	83	83	82	82	85	87	88	88	88	86	82	80	81	81
Mon	80	80	80	81	81	81	81	81	82	82	82	81	82	85	89	93	95	95	96	93	89	84	80	80
Tue	79	79	79	78	77	77	76	75	74	73	73	72	72	72	74	78	83	86	86	85	81	79	77	77

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	79	79	79	79	79	79	78	77	77	77	77	78	79	83	87	93	97	99	99	94	87	80	76	75
Thu	75	75	75	75	74	73	73	72	72	72	73	73	75	78	84	90	94	96	95	91	86	81	78	76
Fri	77	77	77	78	78	79	79	80	80	80	80	80	81	84	88	93	97	102	104	103	96	89	81	79
Sat	79	80	80	80	81	81	81	81	81	82	82	82	82	82	85	88	90	93	94	93	89	87	85	85
Sun	85	85	84	84	84	84	84	83	83	83	83	83	82	82	85	87	88	88	88	86	82	80	81	81
Mon	80	80	80	81	81	81	81	81	82	82	82	81	82	85	89	93	95	95	96	93	89	84	80	80
Tue	79	79	79	78	77	77	76	75	74	73	73	72	72	72	74	78	83	86	86	85	81	79	77	77

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	79	79	79	79	79	79	78	77	77	77	77	78	79	83	87	93	97	99	99	94	87	80	76	75
Thu	75	75	75	75	74	73	73	72	72	72	73	73	75	78	84	90	94	96	95	91	86	81	78	76
Fri	77	77	77	78	78	79	79	80	80	80	80	80	81	84	88	93	97	102	104	103	96	89	81	79
Sat	79	80	80	80	81	81	81	81	81	82	82	82	82	82	85	88	90	93	94	93	89	87	85	85
Sun	85	85	84	84	84	84	84	83	83	83	83	83	82	82	85	87	88	88	88	86	82	80	81	81
Mon	80	80	80	81	81	81	81	81	82	82	82	81	82	85	89	93	95	95	96	93	89	84	80	80
Tue	79	79	79	78	77	77	76	75	74	73	73	72	72	72	74	78	83	86	86	85	81	79	77	77