19 – 25 Aug 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

60.2Weekly mean modelled AQI · Moderate

Mean PM2.5: 15 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-27 AQI compared with the previous week’s mean of 87.2.

Highest hourly estimate: 169 in Hanoi · 25 Aug, 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, 19 Aug	60.5Moderate	15–125	15.1	192 / 192
Thu, 20 Aug	64Moderate	16–152	16.5	192 / 192
Fri, 21 Aug	62.5Moderate	29–107	16.2	192 / 192
Sat, 22 Aug	60.3Moderate	24–119	14.7	192 / 192
Sun, 23 Aug	60.8Moderate	22–108	15.9	192 / 192
Mon, 24 Aug	57.2Moderate	23–97	11.4	192 / 192
Tue, 25 Aug	56.4Moderate	21–169	14.9	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	61	60	59	59	58	58	58	58	58	59	59	59	60	60	60	60	59	63	66	67	66	65	63	60
Thu	59	59	59	59	59	59	59	59	59	59	60	60	60	60	63	69	76	81	81	77	69	63	63	63
Fri	63	63	63	63	63	64	64	64	64	64	64	63	63	62	62	62	62	62	62	62	62	61	60	60
Sat	59	59	59	59	58	58	58	58	58	57	57	58	57	58	58	59	61	64	67	68	67	66	64	62
Sun	58	57	57	57	57	57	57	58	58	58	59	59	59	59	60	60	61	65	67	69	69	68	67	64
Mon	61	59	59	59	58	58	57	57	56	56	55	55	55	55	54	55	57	59	60	60	59	58	56	54
Tue	51	50	50	50	49	49	49	49	49	49	49	49	49	50	50	58	68	76	79	78	71	65	59	58

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	96.4Moderate	169	31.4	168 / 168
Hai Phong	75.3Moderate	152	20.7	168 / 168
Ho Chi Minh City	71.2Moderate	83	19.9	168 / 168
Da Nang	59.5Moderate	126	9.3	168 / 168
Can Tho	58.2Moderate	73	13.8	168 / 168
Nha Trang	57Moderate	74	13.3	168 / 168
Hue	38.4Good	58	6.8	168 / 168
Da Lat	25.9Good	35	4.6	168 / 168

City-hours by category

Good: 429

Moderate: 839

Unhealthy for Sensitive Groups: 71

Unhealthy: 5

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	61	60	59	59	58	58	58	58	58	59	59	59	60	60	60	60	59	63	66	67	66	65	63	60
Thu	59	59	59	59	59	59	59	59	59	59	60	60	60	60	63	69	76	81	81	77	69	63	63	63
Fri	63	63	63	63	63	64	64	64	64	64	64	63	63	62	62	62	62	62	62	62	62	61	60	60
Sat	59	59	59	59	58	58	58	58	58	57	57	58	57	58	58	59	61	64	67	68	67	66	64	62
Sun	58	57	57	57	57	57	57	58	58	58	59	59	59	59	60	60	61	65	67	69	69	68	67	64
Mon	61	59	59	59	58	58	57	57	56	56	55	55	55	55	54	55	57	59	60	60	59	58	56	54
Tue	51	50	50	50	49	49	49	49	49	49	49	49	49	50	50	58	68	76	79	78	71	65	59	58

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	61	60	59	59	58	58	58	58	58	59	59	59	60	60	60	60	59	63	66	67	66	65	63	60
Thu	59	59	59	59	59	59	59	59	59	59	60	60	60	60	63	69	76	81	81	77	69	63	63	63
Fri	63	63	63	63	63	64	64	64	64	64	64	63	63	62	62	62	62	62	62	62	62	61	60	60
Sat	59	59	59	59	58	58	58	58	58	57	57	58	57	58	58	59	61	64	67	68	67	66	64	62
Sun	58	57	57	57	57	57	57	58	58	58	59	59	59	59	60	60	61	65	67	69	69	68	67	64
Mon	61	59	59	59	58	58	57	57	56	56	55	55	55	55	54	55	57	59	60	60	59	58	56	54
Tue	51	50	50	50	49	49	49	49	49	49	49	49	49	50	50	58	68	76	79	78	71	65	59	58

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	61	60	59	59	58	58	58	58	58	59	59	59	60	60	60	60	59	63	66	67	66	65	63	60
Thu	59	59	59	59	59	59	59	59	59	59	60	60	60	60	63	69	76	81	81	77	69	63	63	63
Fri	63	63	63	63	63	64	64	64	64	64	64	63	63	62	62	62	62	62	62	62	62	61	60	60
Sat	59	59	59	59	58	58	58	58	58	57	57	58	57	58	58	59	61	64	67	68	67	66	64	62
Sun	58	57	57	57	57	57	57	58	58	58	59	59	59	59	60	60	61	65	67	69	69	68	67	64
Mon	61	59	59	59	58	58	57	57	56	56	55	55	55	55	54	55	57	59	60	60	59	58	56	54
Tue	51	50	50	50	49	49	49	49	49	49	49	49	49	50	50	58	68	76	79	78	71	65	59	58