8 – 14 Apr 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

120.9Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 39.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.6 AQI compared with the previous week’s mean of 119.3.

Highest hourly estimate: 256 in Da Nang · 11 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, 8 Apr	127.9Unhealthy for Sensitive Groups	71–242	38.5	192 / 192
Thu, 9 Apr	111.3Unhealthy for Sensitive Groups	70–215	33.2	192 / 192
Fri, 10 Apr	118.9Unhealthy for Sensitive Groups	70–253	39.4	192 / 192
Sat, 11 Apr	126Unhealthy for Sensitive Groups	71–256	42.3	192 / 192
Sun, 12 Apr	128.8Unhealthy for Sensitive Groups	72–249	45.3	192 / 192
Mon, 13 Apr	118.1Unhealthy for Sensitive Groups	77–228	35.5	192 / 192
Tue, 14 Apr	115.3Unhealthy for Sensitive Groups	77–220	40.4	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	135	128	121	118	118	119	119	118	118	118	118	118	120	122	126	128	142	151	155	152	144	137	129	118
Thu	108	106	105	104	104	103	102	102	102	101	101	100	101	102	108	112	125	136	140	138	132	122	114	102
Fri	99	98	99	98	98	99	99	99	99	100	101	104	106	108	118	130	145	157	162	160	155	148	141	133
Sat	121	112	109	108	109	109	109	109	109	110	112	115	117	119	125	135	149	162	166	163	154	145	136	124
Sun	115	113	112	113	114	115	116	117	117	117	118	120	122	125	129	140	153	161	163	158	150	143	135	127
Mon	118	114	114	113	112	111	110	110	108	108	106	108	108	112	116	120	132	139	142	140	134	129	121	110
Tue	102	101	102	102	102	103	103	103	105	106	107	109	111	115	120	126	133	141	143	140	135	126	118	112

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	183.9Unhealthy	253	76	168 / 168
Da Nang	157.4Unhealthy	256	37.9	168 / 168
Hue	141.9Unhealthy for Sensitive Groups	205	46.2	168 / 168
Can Tho	118.9Unhealthy for Sensitive Groups	138	42.9	168 / 168
Hai Phong	110.8Unhealthy for Sensitive Groups	181	34	168 / 168
Da Lat	90.2Moderate	122	29.5	168 / 168
Nha Trang	82.7Moderate	130	23.2	168 / 168
Ho Chi Minh City	81.4Moderate	125	24	168 / 168

City-hours by category

Good: 0

Moderate: 548

Unhealthy for Sensitive Groups: 493

Unhealthy: 200

Very Unhealthy: 103

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	135	128	121	118	118	119	119	118	118	118	118	118	120	122	126	128	142	151	155	152	144	137	129	118
Thu	108	106	105	104	104	103	102	102	102	101	101	100	101	102	108	112	125	136	140	138	132	122	114	102
Fri	99	98	99	98	98	99	99	99	99	100	101	104	106	108	118	130	145	157	162	160	155	148	141	133
Sat	121	112	109	108	109	109	109	109	109	110	112	115	117	119	125	135	149	162	166	163	154	145	136	124
Sun	115	113	112	113	114	115	116	117	117	117	118	120	122	125	129	140	153	161	163	158	150	143	135	127
Mon	118	114	114	113	112	111	110	110	108	108	106	108	108	112	116	120	132	139	142	140	134	129	121	110
Tue	102	101	102	102	102	103	103	103	105	106	107	109	111	115	120	126	133	141	143	140	135	126	118	112

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	135	128	121	118	118	119	119	118	118	118	118	118	120	122	126	128	142	151	155	152	144	137	129	118
Thu	108	106	105	104	104	103	102	102	102	101	101	100	101	102	108	112	125	136	140	138	132	122	114	102
Fri	99	98	99	98	98	99	99	99	99	100	101	104	106	108	118	130	145	157	162	160	155	148	141	133
Sat	121	112	109	108	109	109	109	109	109	110	112	115	117	119	125	135	149	162	166	163	154	145	136	124
Sun	115	113	112	113	114	115	116	117	117	117	118	120	122	125	129	140	153	161	163	158	150	143	135	127
Mon	118	114	114	113	112	111	110	110	108	108	106	108	108	112	116	120	132	139	142	140	134	129	121	110
Tue	102	101	102	102	102	103	103	103	105	106	107	109	111	115	120	126	133	141	143	140	135	126	118	112

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	135	128	121	118	118	119	119	118	118	118	118	118	120	122	126	128	142	151	155	152	144	137	129	118
Thu	108	106	105	104	104	103	102	102	102	101	101	100	101	102	108	112	125	136	140	138	132	122	114	102
Fri	99	98	99	98	98	99	99	99	99	100	101	104	106	108	118	130	145	157	162	160	155	148	141	133
Sat	121	112	109	108	109	109	109	109	109	110	112	115	117	119	125	135	149	162	166	163	154	145	136	124
Sun	115	113	112	113	114	115	116	117	117	117	118	120	122	125	129	140	153	161	163	158	150	143	135	127
Mon	118	114	114	113	112	111	110	110	108	108	106	108	108	112	116	120	132	139	142	140	134	129	121	110
Tue	102	101	102	102	102	103	103	103	105	106	107	109	111	115	120	126	133	141	143	140	135	126	118	112