28 May – 3 Jun 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

97.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 28.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+6.6 AQI compared with the previous week’s mean of 90.7.

Highest hourly estimate: 255 in Da Nang · 31 May, 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, 28 May	91Moderate	44–168	28.9	192 / 192
Thu, 29 May	96.2Moderate	25–224	29.4	192 / 192
Fri, 30 May	95.3Moderate	20–227	27.2	192 / 192
Sat, 31 May	96.9Moderate	34–255	28.6	192 / 192
Sun, 1 Jun	103.3Unhealthy for Sensitive Groups	28–223	31	192 / 192
Mon, 2 Jun	96.7Moderate	41–216	28.4	192 / 192
Tue, 3 Jun	101.7Unhealthy for Sensitive Groups	33–250	25.6	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	87	87	88	88	89	89	89	89	89	89	89	88	88	91	94	97	100	101	100	96	92	89	88	88
Thu	87	87	87	86	86	85	85	85	85	85	91	93	94	99	105	110	114	116	115	113	109	103	97	92
Fri	88	86	85	84	83	82	80	78	79	80	80	81	83	85	90	98	110	122	127	128	125	119	112	104
Sat	97	94	90	86	85	86	86	86	85	84	84	88	90	92	97	101	105	111	114	116	115	114	111	109
Sun	106	105	104	101	96	92	92	92	92	93	93	92	92	92	97	105	113	120	122	122	121	118	113	107
Mon	102	97	92	88	87	87	86	85	84	84	83	84	84	84	91	101	112	117	120	118	115	111	107	102
Tue	96	90	90	91	91	91	91	91	90	89	89	95	98	99	103	107	114	122	126	126	123	117	111	102

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
Can Tho	141.7Unhealthy for Sensitive Groups	175	57.5	168 / 168
Da Nang	133.3Unhealthy for Sensitive Groups	255	23.6	168 / 168
Ho Chi Minh City	129.2Unhealthy for Sensitive Groups	161	49.7	168 / 168
Hanoi	116.5Unhealthy for Sensitive Groups	177	36.9	168 / 168
Hai Phong	79Moderate	178	18.9	168 / 168
Nha Trang	70Moderate	139	16.8	168 / 168
Hue	67Moderate	138	16.5	168 / 168
Da Lat	41.6Good	57	7.6	168 / 168

City-hours by category

Good: 124

Moderate: 673

Unhealthy for Sensitive Groups: 322

Unhealthy: 179

Very Unhealthy: 46

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	87	87	88	88	89	89	89	89	89	89	89	88	88	91	94	97	100	101	100	96	92	89	88	88
Thu	87	87	87	86	86	85	85	85	85	85	91	93	94	99	105	110	114	116	115	113	109	103	97	92
Fri	88	86	85	84	83	82	80	78	79	80	80	81	83	85	90	98	110	122	127	128	125	119	112	104
Sat	97	94	90	86	85	86	86	86	85	84	84	88	90	92	97	101	105	111	114	116	115	114	111	109
Sun	106	105	104	101	96	92	92	92	92	93	93	92	92	92	97	105	113	120	122	122	121	118	113	107
Mon	102	97	92	88	87	87	86	85	84	84	83	84	84	84	91	101	112	117	120	118	115	111	107	102
Tue	96	90	90	91	91	91	91	91	90	89	89	95	98	99	103	107	114	122	126	126	123	117	111	102

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	87	87	88	88	89	89	89	89	89	89	89	88	88	91	94	97	100	101	100	96	92	89	88	88
Thu	87	87	87	86	86	85	85	85	85	85	91	93	94	99	105	110	114	116	115	113	109	103	97	92
Fri	88	86	85	84	83	82	80	78	79	80	80	81	83	85	90	98	110	122	127	128	125	119	112	104
Sat	97	94	90	86	85	86	86	86	85	84	84	88	90	92	97	101	105	111	114	116	115	114	111	109
Sun	106	105	104	101	96	92	92	92	92	93	93	92	92	92	97	105	113	120	122	122	121	118	113	107
Mon	102	97	92	88	87	87	86	85	84	84	83	84	84	84	91	101	112	117	120	118	115	111	107	102
Tue	96	90	90	91	91	91	91	91	90	89	89	95	98	99	103	107	114	122	126	126	123	117	111	102

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	87	87	88	88	89	89	89	89	89	89	89	88	88	91	94	97	100	101	100	96	92	89	88	88
Thu	87	87	87	86	86	85	85	85	85	85	91	93	94	99	105	110	114	116	115	113	109	103	97	92
Fri	88	86	85	84	83	82	80	78	79	80	80	81	83	85	90	98	110	122	127	128	125	119	112	104
Sat	97	94	90	86	85	86	86	86	85	84	84	88	90	92	97	101	105	111	114	116	115	114	111	109
Sun	106	105	104	101	96	92	92	92	92	93	93	92	92	92	97	105	113	120	122	122	121	118	113	107
Mon	102	97	92	88	87	87	86	85	84	84	83	84	84	84	91	101	112	117	120	118	115	111	107	102
Tue	96	90	90	91	91	91	91	91	90	89	89	95	98	99	103	107	114	122	126	126	123	117	111	102