12 – 18 Aug 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

87.2Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+4.2 AQI compared with the previous week’s mean of 83.

Highest hourly estimate: 238 in Hai Phong · 12 Aug, 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, 12 Aug	90.5Moderate	17–238	27	192 / 192
Thu, 13 Aug	90.9Moderate	25–224	26.1	192 / 192
Fri, 14 Aug	91Moderate	27–196	27.3	192 / 192
Sat, 15 Aug	92.2Moderate	22–231	25.9	192 / 192
Sun, 16 Aug	84.8Moderate	23–235	24	192 / 192
Mon, 17 Aug	86.1Moderate	20–230	23.5	192 / 192
Tue, 18 Aug	75Moderate	18–205	16.4	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	84	77	78	78	78	78	78	79	78	78	78	79	79	79	85	100	108	115	119	119	116	112	103	96
Thu	89	83	79	79	78	78	77	77	77	77	78	78	78	84	90	99	108	116	119	118	114	109	102	95
Fri	89	86	83	84	84	85	85	86	85	85	85	84	84	83	87	92	101	108	109	107	104	100	97	95
Sat	94	92	90	88	84	81	80	80	80	80	80	80	81	81	85	94	105	111	114	115	112	109	104	98
Sun	88	80	79	78	77	77	77	78	78	78	78	78	77	77	82	89	94	99	101	102	99	96	90	83
Mon	75	76	76	77	77	77	77	77	77	76	76	77	76	76	82	94	102	107	109	109	107	103	96	87
Tue	82	78	76	75	73	71	69	67	66	66	66	66	66	66	68	78	86	92	93	92	88	80	72	64

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	173.1Unhealthy	235	69.1	168 / 168
Hai Phong	161.4Unhealthy	238	52	168 / 168
Da Nang	94.1Moderate	208	11.9	168 / 168
Ho Chi Minh City	73.6Moderate	87	21.4	168 / 168
Nha Trang	59.8Moderate	108	12.3	168 / 168
Can Tho	55.1Moderate	60	11.4	168 / 168
Hue	55.1Moderate	67	12.2	168 / 168
Da Lat	25.4Good	37	4.2	168 / 168

City-hours by category

Good: 253

Moderate: 694

Unhealthy for Sensitive Groups: 105

Unhealthy: 221

Very Unhealthy: 71

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	84	77	78	78	78	78	78	79	78	78	78	79	79	79	85	100	108	115	119	119	116	112	103	96
Thu	89	83	79	79	78	78	77	77	77	77	78	78	78	84	90	99	108	116	119	118	114	109	102	95
Fri	89	86	83	84	84	85	85	86	85	85	85	84	84	83	87	92	101	108	109	107	104	100	97	95
Sat	94	92	90	88	84	81	80	80	80	80	80	80	81	81	85	94	105	111	114	115	112	109	104	98
Sun	88	80	79	78	77	77	77	78	78	78	78	78	77	77	82	89	94	99	101	102	99	96	90	83
Mon	75	76	76	77	77	77	77	77	77	76	76	77	76	76	82	94	102	107	109	109	107	103	96	87
Tue	82	78	76	75	73	71	69	67	66	66	66	66	66	66	68	78	86	92	93	92	88	80	72	64

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	84	77	78	78	78	78	78	79	78	78	78	79	79	79	85	100	108	115	119	119	116	112	103	96
Thu	89	83	79	79	78	78	77	77	77	77	78	78	78	84	90	99	108	116	119	118	114	109	102	95
Fri	89	86	83	84	84	85	85	86	85	85	85	84	84	83	87	92	101	108	109	107	104	100	97	95
Sat	94	92	90	88	84	81	80	80	80	80	80	80	81	81	85	94	105	111	114	115	112	109	104	98
Sun	88	80	79	78	77	77	77	78	78	78	78	78	77	77	82	89	94	99	101	102	99	96	90	83
Mon	75	76	76	77	77	77	77	77	77	76	76	77	76	76	82	94	102	107	109	109	107	103	96	87
Tue	82	78	76	75	73	71	69	67	66	66	66	66	66	66	68	78	86	92	93	92	88	80	72	64

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	84	77	78	78	78	78	78	79	78	78	78	79	79	79	85	100	108	115	119	119	116	112	103	96
Thu	89	83	79	79	78	78	77	77	77	77	78	78	78	84	90	99	108	116	119	118	114	109	102	95
Fri	89	86	83	84	84	85	85	86	85	85	85	84	84	83	87	92	101	108	109	107	104	100	97	95
Sat	94	92	90	88	84	81	80	80	80	80	80	80	81	81	85	94	105	111	114	115	112	109	104	98
Sun	88	80	79	78	77	77	77	78	78	78	78	78	77	77	82	89	94	99	101	102	99	96	90	83
Mon	75	76	76	77	77	77	77	77	77	76	76	77	76	76	82	94	102	107	109	109	107	103	96	87
Tue	82	78	76	75	73	71	69	67	66	66	66	66	66	66	68	78	86	92	93	92	88	80	72	64