15 – 21 Jul 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

94.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 28.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+14.1 AQI compared with the previous week’s mean of 80.4.

Highest hourly estimate: 223 in Da Nang · 21 Jul, 19:00 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, 15 Jul	91.1Moderate	27–222	28.1	192 / 192
Thu, 16 Jul	85.9Moderate	31–158	23.2	192 / 192
Fri, 17 Jul	85.4Moderate	30–183	25.5	192 / 192
Sat, 18 Jul	94.2Moderate	35–202	27.1	192 / 192
Sun, 19 Jul	98.7Moderate	51–203	30.6	192 / 192
Mon, 20 Jul	99.7Moderate	54–205	31	192 / 192
Tue, 21 Jul	106.7Unhealthy for Sensitive Groups	58–223	36.2	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	77	77	78	79	79	79	80	80	81	81	82	82	83	83	84	95	109	117	120	119	116	111	102	94
Thu	90	87	85	86	86	86	86	87	86	85	84	83	82	81	80	81	88	94	98	97	92	85	78	76
Fri	76	76	76	75	75	75	75	74	75	75	75	76	76	77	80	86	95	105	112	113	109	103	98	93
Sat	89	85	82	82	82	82	82	82	82	82	82	82	82	83	85	95	110	121	126	126	122	115	105	97
Sun	93	89	87	88	89	90	92	92	92	93	93	93	93	96	97	102	109	116	119	119	115	109	104	101
Mon	97	93	92	92	92	92	92	92	92	92	92	92	92	92	95	102	109	116	120	120	117	113	108	103
Tue	101	98	97	95	94	94	94	95	95	95	96	96	100	103	105	115	122	126	128	128	127	124	120	114

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	138.4Unhealthy for Sensitive Groups	222	54.3	168 / 168
Ho Chi Minh City	110Unhealthy for Sensitive Groups	139	39.9	168 / 168
Da Nang	107.6Unhealthy for Sensitive Groups	223	18.6	168 / 168
Hai Phong	104.8Unhealthy for Sensitive Groups	175	33.3	168 / 168
Can Tho	90.2Moderate	116	30.3	168 / 168
Nha Trang	85.5Moderate	164	21.9	168 / 168
Hue	73.7Moderate	84	22.2	168 / 168
Da Lat	45.9Good	62	10	168 / 168

City-hours by category

Good: 94

Moderate: 779

Unhealthy for Sensitive Groups: 342

Unhealthy: 109

Very Unhealthy: 20

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	77	77	78	79	79	79	80	80	81	81	82	82	83	83	84	95	109	117	120	119	116	111	102	94
Thu	90	87	85	86	86	86	86	87	86	85	84	83	82	81	80	81	88	94	98	97	92	85	78	76
Fri	76	76	76	75	75	75	75	74	75	75	75	76	76	77	80	86	95	105	112	113	109	103	98	93
Sat	89	85	82	82	82	82	82	82	82	82	82	82	82	83	85	95	110	121	126	126	122	115	105	97
Sun	93	89	87	88	89	90	92	92	92	93	93	93	93	96	97	102	109	116	119	119	115	109	104	101
Mon	97	93	92	92	92	92	92	92	92	92	92	92	92	92	95	102	109	116	120	120	117	113	108	103
Tue	101	98	97	95	94	94	94	95	95	95	96	96	100	103	105	115	122	126	128	128	127	124	120	114

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	77	77	78	79	79	79	80	80	81	81	82	82	83	83	84	95	109	117	120	119	116	111	102	94
Thu	90	87	85	86	86	86	86	87	86	85	84	83	82	81	80	81	88	94	98	97	92	85	78	76
Fri	76	76	76	75	75	75	75	74	75	75	75	76	76	77	80	86	95	105	112	113	109	103	98	93
Sat	89	85	82	82	82	82	82	82	82	82	82	82	82	83	85	95	110	121	126	126	122	115	105	97
Sun	93	89	87	88	89	90	92	92	92	93	93	93	93	96	97	102	109	116	119	119	115	109	104	101
Mon	97	93	92	92	92	92	92	92	92	92	92	92	92	92	95	102	109	116	120	120	117	113	108	103
Tue	101	98	97	95	94	94	94	95	95	95	96	96	100	103	105	115	122	126	128	128	127	124	120	114

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	77	77	78	79	79	79	80	80	81	81	82	82	83	83	84	95	109	117	120	119	116	111	102	94
Thu	90	87	85	86	86	86	86	87	86	85	84	83	82	81	80	81	88	94	98	97	92	85	78	76
Fri	76	76	76	75	75	75	75	74	75	75	75	76	76	77	80	86	95	105	112	113	109	103	98	93
Sat	89	85	82	82	82	82	82	82	82	82	82	82	82	83	85	95	110	121	126	126	122	115	105	97
Sun	93	89	87	88	89	90	92	92	92	93	93	93	93	96	97	102	109	116	119	119	115	109	104	101
Mon	97	93	92	92	92	92	92	92	92	92	92	92	92	92	95	102	109	116	120	120	117	113	108	103
Tue	101	98	97	95	94	94	94	95	95	95	96	96	100	103	105	115	122	126	128	128	127	124	120	114