27 May – 2 Jun 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

96.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 29 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.7 AQI compared with the previous week’s mean of 94.6.

Highest hourly estimate: 232 in Da Nang · 27 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, 27 May	107.5Unhealthy for Sensitive Groups	43–232	26.7	192 / 192
Thu, 28 May	99.6Moderate	52–204	27.3	192 / 192
Fri, 29 May	99.4Moderate	54–208	33.6	192 / 192
Sat, 30 May	96.2Moderate	49–163	30.1	192 / 192
Sun, 31 May	96.9Moderate	23–207	31.7	192 / 192
Mon, 1 Jun	90.4Moderate	29–193	27.8	192 / 192
Tue, 2 Jun	84.2Moderate	22–169	25.7	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	90	84	81	81	82	82	83	84	84	84	89	93	93	99	118	136	149	155	156	151	144	135	122	107
Thu	93	90	89	87	86	85	85	84	84	84	84	85	89	95	104	116	128	135	136	131	123	111	98	88
Fri	85	86	87	88	88	89	89	89	90	92	92	93	94	94	101	110	120	126	126	123	115	108	102	99
Sat	99	98	98	98	98	98	98	99	98	98	97	97	96	95	94	93	95	98	99	96	93	91	91	91
Sun	92	93	93	94	95	96	97	97	97	96	96	96	95	95	95	95	99	104	104	103	101	100	98	96
Mon	95	94	94	92	91	90	89	89	88	88	87	87	86	86	86	88	94	98	99	97	93	91	86	85
Tue	84	84	84	84	83	83	82	81	81	81	81	81	80	81	80	83	90	95	97	95	91	84	79	79

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	139.8Unhealthy for Sensitive Groups	231	44.5	168 / 168
Ho Chi Minh City	138.6Unhealthy for Sensitive Groups	164	54.8	168 / 168
Can Tho	102.2Unhealthy for Sensitive Groups	133	35.6	168 / 168
Hai Phong	94.1Moderate	169	26.6	168 / 168
Da Nang	87.6Moderate	232	19	168 / 168
Hue	86.5Moderate	175	22.7	168 / 168
Nha Trang	76Moderate	168	19.3	168 / 168
Da Lat	45.7Good	69	9.3	168 / 168

City-hours by category

Good: 110

Moderate: 713

Unhealthy for Sensitive Groups: 359

Unhealthy: 139

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	90	84	81	81	82	82	83	84	84	84	89	93	93	99	118	136	149	155	156	151	144	135	122	107
Thu	93	90	89	87	86	85	85	84	84	84	84	85	89	95	104	116	128	135	136	131	123	111	98	88
Fri	85	86	87	88	88	89	89	89	90	92	92	93	94	94	101	110	120	126	126	123	115	108	102	99
Sat	99	98	98	98	98	98	98	99	98	98	97	97	96	95	94	93	95	98	99	96	93	91	91	91
Sun	92	93	93	94	95	96	97	97	97	96	96	96	95	95	95	95	99	104	104	103	101	100	98	96
Mon	95	94	94	92	91	90	89	89	88	88	87	87	86	86	86	88	94	98	99	97	93	91	86	85
Tue	84	84	84	84	83	83	82	81	81	81	81	81	80	81	80	83	90	95	97	95	91	84	79	79

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	90	84	81	81	82	82	83	84	84	84	89	93	93	99	118	136	149	155	156	151	144	135	122	107
Thu	93	90	89	87	86	85	85	84	84	84	84	85	89	95	104	116	128	135	136	131	123	111	98	88
Fri	85	86	87	88	88	89	89	89	90	92	92	93	94	94	101	110	120	126	126	123	115	108	102	99
Sat	99	98	98	98	98	98	98	99	98	98	97	97	96	95	94	93	95	98	99	96	93	91	91	91
Sun	92	93	93	94	95	96	97	97	97	96	96	96	95	95	95	95	99	104	104	103	101	100	98	96
Mon	95	94	94	92	91	90	89	89	88	88	87	87	86	86	86	88	94	98	99	97	93	91	86	85
Tue	84	84	84	84	83	83	82	81	81	81	81	81	80	81	80	83	90	95	97	95	91	84	79	79

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	90	84	81	81	82	82	83	84	84	84	89	93	93	99	118	136	149	155	156	151	144	135	122	107
Thu	93	90	89	87	86	85	85	84	84	84	84	85	89	95	104	116	128	135	136	131	123	111	98	88
Fri	85	86	87	88	88	89	89	89	90	92	92	93	94	94	101	110	120	126	126	123	115	108	102	99
Sat	99	98	98	98	98	98	98	99	98	98	97	97	96	95	94	93	95	98	99	96	93	91	91	91
Sun	92	93	93	94	95	96	97	97	97	96	96	96	95	95	95	95	99	104	104	103	101	100	98	96
Mon	95	94	94	92	91	90	89	89	88	88	87	87	86	86	86	88	94	98	99	97	93	91	86	85
Tue	84	84	84	84	83	83	82	81	81	81	81	81	80	81	80	83	90	95	97	95	91	84	79	79