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

Vietnam weekly air quality

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

94.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 28.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-26 AQI compared with the previous week’s mean of 120.9.

Highest hourly estimate: 202 in Da Nang · 20 Apr, 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, 15 Apr	108.1Unhealthy for Sensitive Groups	73–182	31.3	192 / 192
Thu, 16 Apr	97.7Moderate	69–189	31.4	192 / 192
Fri, 17 Apr	91.1Moderate	62–175	27.6	192 / 192
Sat, 18 Apr	91.6Moderate	58–146	28.7	192 / 192
Sun, 19 Apr	91.5Moderate	54–157	28.6	192 / 192
Mon, 20 Apr	95.2Moderate	55–202	26.1	192 / 192
Tue, 21 Apr	88.9Moderate	61–186	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	112	111	111	111	111	111	110	110	108	107	106	105	104	104	108	111	116	119	117	112	104	98	96	95
Thu	94	94	93	93	92	92	91	91	92	92	93	93	93	97	103	106	111	113	112	109	103	97	95	95
Fri	94	94	94	94	94	94	93	93	93	92	91	90	89	88	87	87	91	95	95	91	90	88	85	86
Sat	86	87	87	87	88	88	89	89	90	90	91	90	90	91	91	95	100	103	102	99	95	91	90	90
Sun	89	89	89	89	89	89	89	89	89	89	89	88	88	88	88	93	98	102	104	102	97	93	89	88
Mon	88	88	88	88	87	87	86	86	86	86	86	86	87	91	98	106	113	119	120	116	109	102	95	87
Tue	83	83	83	83	83	82	82	82	81	81	81	81	81	84	89	97	104	109	112	110	102	95	87	81

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	134.9Unhealthy for Sensitive Groups	157	48.6	168 / 168
Hue	117.1Unhealthy for Sensitive Groups	186	34.1	168 / 168
Can Tho	115Unhealthy for Sensitive Groups	136	40.6	168 / 168
Da Nang	89.3Moderate	202	19	168 / 168
Da Lat	86.1Moderate	111	26.3	168 / 168
Hai Phong	82.2Moderate	114	24.7	168 / 168
Ho Chi Minh City	68.3Moderate	82	17.9	168 / 168
Nha Trang	65.9Moderate	96	16.6	168 / 168

City-hours by category

Good: 0

Moderate: 849

Unhealthy for Sensitive Groups: 405

Unhealthy: 89

Very Unhealthy: 1

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	112	111	111	111	111	111	110	110	108	107	106	105	104	104	108	111	116	119	117	112	104	98	96	95
Thu	94	94	93	93	92	92	91	91	92	92	93	93	93	97	103	106	111	113	112	109	103	97	95	95
Fri	94	94	94	94	94	94	93	93	93	92	91	90	89	88	87	87	91	95	95	91	90	88	85	86
Sat	86	87	87	87	88	88	89	89	90	90	91	90	90	91	91	95	100	103	102	99	95	91	90	90
Sun	89	89	89	89	89	89	89	89	89	89	89	88	88	88	88	93	98	102	104	102	97	93	89	88
Mon	88	88	88	88	87	87	86	86	86	86	86	86	87	91	98	106	113	119	120	116	109	102	95	87
Tue	83	83	83	83	83	82	82	82	81	81	81	81	81	84	89	97	104	109	112	110	102	95	87	81

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	112	111	111	111	111	111	110	110	108	107	106	105	104	104	108	111	116	119	117	112	104	98	96	95
Thu	94	94	93	93	92	92	91	91	92	92	93	93	93	97	103	106	111	113	112	109	103	97	95	95
Fri	94	94	94	94	94	94	93	93	93	92	91	90	89	88	87	87	91	95	95	91	90	88	85	86
Sat	86	87	87	87	88	88	89	89	90	90	91	90	90	91	91	95	100	103	102	99	95	91	90	90
Sun	89	89	89	89	89	89	89	89	89	89	89	88	88	88	88	93	98	102	104	102	97	93	89	88
Mon	88	88	88	88	87	87	86	86	86	86	86	86	87	91	98	106	113	119	120	116	109	102	95	87
Tue	83	83	83	83	83	82	82	82	81	81	81	81	81	84	89	97	104	109	112	110	102	95	87	81

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	112	111	111	111	111	111	110	110	108	107	106	105	104	104	108	111	116	119	117	112	104	98	96	95
Thu	94	94	93	93	92	92	91	91	92	92	93	93	93	97	103	106	111	113	112	109	103	97	95	95
Fri	94	94	94	94	94	94	93	93	93	92	91	90	89	88	87	87	91	95	95	91	90	88	85	86
Sat	86	87	87	87	88	88	89	89	90	90	91	90	90	91	91	95	100	103	102	99	95	91	90	90
Sun	89	89	89	89	89	89	89	89	89	89	89	88	88	88	88	93	98	102	104	102	97	93	89	88
Mon	88	88	88	88	87	87	86	86	86	86	86	86	87	91	98	106	113	119	120	116	109	102	95	87
Tue	83	83	83	83	83	82	82	82	81	81	81	81	81	84	89	97	104	109	112	110	102	95	87	81