2 – 8 Sep 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

85.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.7 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+12.8 AQI compared with the previous week’s mean of 72.6.

Highest hourly estimate: 226 in Da Nang · 4 Sept, 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, 2 Sep	72.4Moderate	20–153	20.8	192 / 192
Thu, 3 Sep	85.2Moderate	29–178	28.2	192 / 192
Fri, 4 Sep	88.1Moderate	26–226	21	192 / 192
Sat, 5 Sep	75.6Moderate	23–187	20.8	192 / 192
Sun, 6 Sep	82Moderate	20–203	25.1	192 / 192
Mon, 7 Sep	100.7Unhealthy for Sensitive Groups	28–226	29	192 / 192
Tue, 8 Sep	93.9Moderate	24–207	27.7	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	68	67	66	66	66	66	66	66	67	67	67	67	67	68	69	74	80	87	89	87	84	80	78	76
Thu	74	73	74	76	77	78	79	80	80	80	80	80	80	80	84	91	96	101	103	103	100	96	92	91
Fri	89	88	86	84	82	81	80	79	79	79	79	78	83	84	88	94	98	101	102	102	100	97	93	88
Sat	84	80	77	75	74	72	70	69	70	70	70	70	70	72	75	78	80	84	85	84	81	77	75	73
Sun	71	70	70	69	70	70	71	72	72	73	73	73	74	77	82	86	93	100	104	104	103	101	98	93
Mon	93	94	95	95	95	94	93	92	90	89	89	91	93	96	100	106	115	122	124	122	116	108	103	102
Tue	101	101	100	98	97	96	95	94	92	90	90	90	90	91	92	94	99	103	103	98	91	85	84	83

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	142.9Unhealthy for Sensitive Groups	202	58	168 / 168
Da Nang	123.6Unhealthy for Sensitive Groups	226	22	168 / 168
Hai Phong	107.4Unhealthy for Sensitive Groups	180	36.6	168 / 168
Hue	88.4Moderate	148	27.3	168 / 168
Ho Chi Minh City	78.5Moderate	90	24.5	168 / 168
Nha Trang	59.9Moderate	97	12.3	168 / 168
Can Tho	53.7Moderate	64	11.3	168 / 168
Da Lat	29Good	40	5.2	168 / 168

City-hours by category

Good: 267

Moderate: 687

Unhealthy for Sensitive Groups: 240

Unhealthy: 127

Very Unhealthy: 23

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	68	67	66	66	66	66	66	66	67	67	67	67	67	68	69	74	80	87	89	87	84	80	78	76
Thu	74	73	74	76	77	78	79	80	80	80	80	80	80	80	84	91	96	101	103	103	100	96	92	91
Fri	89	88	86	84	82	81	80	79	79	79	79	78	83	84	88	94	98	101	102	102	100	97	93	88
Sat	84	80	77	75	74	72	70	69	70	70	70	70	70	72	75	78	80	84	85	84	81	77	75	73
Sun	71	70	70	69	70	70	71	72	72	73	73	73	74	77	82	86	93	100	104	104	103	101	98	93
Mon	93	94	95	95	95	94	93	92	90	89	89	91	93	96	100	106	115	122	124	122	116	108	103	102
Tue	101	101	100	98	97	96	95	94	92	90	90	90	90	91	92	94	99	103	103	98	91	85	84	83

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	68	67	66	66	66	66	66	66	67	67	67	67	67	68	69	74	80	87	89	87	84	80	78	76
Thu	74	73	74	76	77	78	79	80	80	80	80	80	80	80	84	91	96	101	103	103	100	96	92	91
Fri	89	88	86	84	82	81	80	79	79	79	79	78	83	84	88	94	98	101	102	102	100	97	93	88
Sat	84	80	77	75	74	72	70	69	70	70	70	70	70	72	75	78	80	84	85	84	81	77	75	73
Sun	71	70	70	69	70	70	71	72	72	73	73	73	74	77	82	86	93	100	104	104	103	101	98	93
Mon	93	94	95	95	95	94	93	92	90	89	89	91	93	96	100	106	115	122	124	122	116	108	103	102
Tue	101	101	100	98	97	96	95	94	92	90	90	90	90	91	92	94	99	103	103	98	91	85	84	83

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	68	67	66	66	66	66	66	66	67	67	67	67	67	68	69	74	80	87	89	87	84	80	78	76
Thu	74	73	74	76	77	78	79	80	80	80	80	80	80	80	84	91	96	101	103	103	100	96	92	91
Fri	89	88	86	84	82	81	80	79	79	79	79	78	83	84	88	94	98	101	102	102	100	97	93	88
Sat	84	80	77	75	74	72	70	69	70	70	70	70	70	72	75	78	80	84	85	84	81	77	75	73
Sun	71	70	70	69	70	70	71	72	72	73	73	73	74	77	82	86	93	100	104	104	103	101	98	93
Mon	93	94	95	95	95	94	93	92	90	89	89	91	93	96	100	106	115	122	124	122	116	108	103	102
Tue	101	101	100	98	97	96	95	94	92	90	90	90	90	91	92	94	99	103	103	98	91	85	84	83