19 – 25 Nov 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

67.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 19.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-10.1 AQI compared with the previous week’s mean of 77.2.

Highest hourly estimate: 174 in Hanoi · 23 Nov, 19:00 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, 19 Nov	54.1Moderate	16–86	12.3	192 / 192
Thu, 20 Nov	56.5Moderate	29–94	14	192 / 192
Fri, 21 Nov	57.4Moderate	30–92	14.8	192 / 192
Sat, 22 Nov	67Moderate	32–152	21.3	192 / 192
Sun, 23 Nov	76.3Moderate	24–174	26.8	192 / 192
Mon, 24 Nov	81.5Moderate	23–173	23.5	192 / 192
Tue, 25 Nov	76.9Moderate	31–136	23	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	58	58	57	57	56	56	56	55	54	53	52	52	52	52	52	52	53	53	53	54	54	54	54	54
Thu	55	55	55	56	56	56	56	56	56	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57
Fri	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	58	58	58	59	60	61
Sat	62	62	63	64	64	64	64	64	65	66	66	67	67	68	68	69	69	69	70	71	71	72	73	73
Sun	73	73	74	74	75	75	76	76	76	77	76	77	77	77	77	78	77	77	79	79	77	77	77	78
Mon	78	79	79	80	80	81	81	82	82	82	82	82	82	82	83	83	83	84	84	83	82	81	81	80
Tue	79	78	77	75	74	73	72	71	70	70	70	72	73	75	76	78	80	82	83	84	85	84	84	83

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	107.9Unhealthy for Sensitive Groups	174	43.1	168 / 168
Ho Chi Minh City	74.7Moderate	98	22.7	168 / 168
Hai Phong	74.3Moderate	126	22.2	168 / 168
Da Nang	73.1Moderate	131	19.1	168 / 168
Hue	72Moderate	87	21.5	168 / 168
Can Tho	61.7Moderate	82	15.8	168 / 168
Nha Trang	42Good	89	8.3	168 / 168
Da Lat	31.2Good	50	2.5	168 / 168

City-hours by category

Good: 369

Moderate: 865

Unhealthy for Sensitive Groups: 62

Unhealthy: 48

Very Unhealthy: 0

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	58	58	57	57	56	56	56	55	54	53	52	52	52	52	52	52	53	53	53	54	54	54	54	54
Thu	55	55	55	56	56	56	56	56	56	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57
Fri	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	58	58	58	59	60	61
Sat	62	62	63	64	64	64	64	64	65	66	66	67	67	68	68	69	69	69	70	71	71	72	73	73
Sun	73	73	74	74	75	75	76	76	76	77	76	77	77	77	77	78	77	77	79	79	77	77	77	78
Mon	78	79	79	80	80	81	81	82	82	82	82	82	82	82	83	83	83	84	84	83	82	81	81	80
Tue	79	78	77	75	74	73	72	71	70	70	70	72	73	75	76	78	80	82	83	84	85	84	84	83

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	58	58	57	57	56	56	56	55	54	53	52	52	52	52	52	52	53	53	53	54	54	54	54	54
Thu	55	55	55	56	56	56	56	56	56	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57
Fri	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	58	58	58	59	60	61
Sat	62	62	63	64	64	64	64	64	65	66	66	67	67	68	68	69	69	69	70	71	71	72	73	73
Sun	73	73	74	74	75	75	76	76	76	77	76	77	77	77	77	78	77	77	79	79	77	77	77	78
Mon	78	79	79	80	80	81	81	82	82	82	82	82	82	82	83	83	83	84	84	83	82	81	81	80
Tue	79	78	77	75	74	73	72	71	70	70	70	72	73	75	76	78	80	82	83	84	85	84	84	83

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	58	58	57	57	56	56	56	55	54	53	52	52	52	52	52	52	53	53	53	54	54	54	54	54
Thu	55	55	55	56	56	56	56	56	56	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57
Fri	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	58	58	58	59	60	61
Sat	62	62	63	64	64	64	64	64	65	66	66	67	67	68	68	69	69	69	70	71	71	72	73	73
Sun	73	73	74	74	75	75	76	76	76	77	76	77	77	77	77	78	77	77	79	79	77	77	77	78
Mon	78	79	79	80	80	81	81	82	82	82	82	82	82	82	83	83	83	84	84	83	82	81	81	80
Tue	79	78	77	75	74	73	72	71	70	70	70	72	73	75	76	78	80	82	83	84	85	84	84	83