14 – 20 Oct 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

67.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-7.2 AQI compared with the previous week’s mean of 75.1.

Highest hourly estimate: 204 in Hanoi · 14 Oct, 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, 14 Oct	74.5Moderate	28–204	24	192 / 192
Thu, 15 Oct	80Moderate	25–191	23.6	192 / 192
Fri, 16 Oct	80.4Moderate	26–152	22.5	192 / 192
Sat, 17 Oct	69.9Moderate	25–148	17.2	192 / 192
Sun, 18 Oct	56.9Moderate	20–137	12.3	192 / 192
Mon, 19 Oct	54.1Moderate	15–107	14.2	192 / 192
Tue, 20 Oct	59.5Moderate	27–127	16.1	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	67	67	67	68	69	69	70	70	71	72	73	73	74	74	75	76	79	86	88	87	84	79	77	77
Thu	77	77	77	76	76	76	76	76	75	75	75	75	75	77	79	82	88	94	96	93	88	82	80	79
Fri	78	77	77	77	77	77	77	77	77	77	77	78	78	78	79	82	88	94	95	92	86	80	76	75
Sat	74	74	73	73	72	72	72	72	71	71	70	70	69	68	68	67	68	71	72	71	69	66	63	63
Sun	62	62	61	60	60	59	58	57	56	56	55	55	54	54	54	54	56	58	60	60	58	56	52	52
Mon	52	51	51	51	51	51	51	51	52	52	53	54	55	55	56	57	57	58	59	58	56	56	56	56
Tue	57	57	57	58	58	59	59	59	59	59	59	59	59	59	59	59	59	62	64	64	63	62	60	60

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	119.2Unhealthy for Sensitive Groups	204	38.7	168 / 168
Ho Chi Minh City	80.8Moderate	128	25.1	168 / 168
Hai Phong	79.6Moderate	154	22.8	168 / 168
Can Tho	78.7Moderate	112	24.2	168 / 168
Da Nang	59Moderate	110	12.4	168 / 168
Hue	57.9Moderate	91	13.3	168 / 168
Nha Trang	38.9Good	53	6.8	168 / 168
Da Lat	29.3Good	37	5.1	168 / 168

City-hours by category

Good: 357

Moderate: 822

Unhealthy for Sensitive Groups: 117

Unhealthy: 46

Very Unhealthy: 2

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	67	67	67	68	69	69	70	70	71	72	73	73	74	74	75	76	79	86	88	87	84	79	77	77
Thu	77	77	77	76	76	76	76	76	75	75	75	75	75	77	79	82	88	94	96	93	88	82	80	79
Fri	78	77	77	77	77	77	77	77	77	77	77	78	78	78	79	82	88	94	95	92	86	80	76	75
Sat	74	74	73	73	72	72	72	72	71	71	70	70	69	68	68	67	68	71	72	71	69	66	63	63
Sun	62	62	61	60	60	59	58	57	56	56	55	55	54	54	54	54	56	58	60	60	58	56	52	52
Mon	52	51	51	51	51	51	51	51	52	52	53	54	55	55	56	57	57	58	59	58	56	56	56	56
Tue	57	57	57	58	58	59	59	59	59	59	59	59	59	59	59	59	59	62	64	64	63	62	60	60

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	67	67	67	68	69	69	70	70	71	72	73	73	74	74	75	76	79	86	88	87	84	79	77	77
Thu	77	77	77	76	76	76	76	76	75	75	75	75	75	77	79	82	88	94	96	93	88	82	80	79
Fri	78	77	77	77	77	77	77	77	77	77	77	78	78	78	79	82	88	94	95	92	86	80	76	75
Sat	74	74	73	73	72	72	72	72	71	71	70	70	69	68	68	67	68	71	72	71	69	66	63	63
Sun	62	62	61	60	60	59	58	57	56	56	55	55	54	54	54	54	56	58	60	60	58	56	52	52
Mon	52	51	51	51	51	51	51	51	52	52	53	54	55	55	56	57	57	58	59	58	56	56	56	56
Tue	57	57	57	58	58	59	59	59	59	59	59	59	59	59	59	59	59	62	64	64	63	62	60	60

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	67	67	67	68	69	69	70	70	71	72	73	73	74	74	75	76	79	86	88	87	84	79	77	77
Thu	77	77	77	76	76	76	76	76	75	75	75	75	75	77	79	82	88	94	96	93	88	82	80	79
Fri	78	77	77	77	77	77	77	77	77	77	77	78	78	78	79	82	88	94	95	92	86	80	76	75
Sat	74	74	73	73	72	72	72	72	71	71	70	70	69	68	68	67	68	71	72	71	69	66	63	63
Sun	62	62	61	60	60	59	58	57	56	56	55	55	54	54	54	54	56	58	60	60	58	56	52	52
Mon	52	51	51	51	51	51	51	51	52	52	53	54	55	55	56	57	57	58	59	58	56	56	56	56
Tue	57	57	57	58	58	59	59	59	59	59	59	59	59	59	59	59	59	62	64	64	63	62	60	60