4 – 10 Feb 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

79.2Weekly mean modelled AQI · Moderate

Mean PM2.5: 23.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+4 AQI compared with the previous week’s mean of 75.2.

Highest hourly estimate: 179 in Hanoi · 4 Feb, 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, 4 Feb	87.9Moderate	28–179	27.4	192 / 192
Thu, 5 Feb	81.8Moderate	35–170	23.1	192 / 192
Fri, 6 Feb	79.5Moderate	58–135	22.2	192 / 192
Sat, 7 Feb	76.2Moderate	50–128	22.5	192 / 192
Sun, 8 Feb	71.6Moderate	42–119	16.3	192 / 192
Mon, 9 Feb	68.8Moderate	40–151	21.9	192 / 192
Tue, 10 Feb	88.7Moderate	32–168	31.3	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	88	88	87	87	87	87	87	86	87	86	86	85	85	85	85	87	89	93	97	97	94	89	86	83
Thu	82	82	81	80	80	79	78	78	77	77	78	78	78	79	79	80	83	91	96	95	91	85	79	78
Fri	78	78	78	78	78	78	79	79	78	78	77	77	77	76	76	79	83	87	90	89	85	79	76	76
Sat	76	76	76	76	77	77	77	78	77	77	77	76	76	75	75	75	75	76	77	77	76	76	76	76
Sun	77	77	76	76	75	74	73	72	72	71	70	70	70	69	69	69	69	72	75	75	73	70	65	64
Mon	63	63	62	62	62	62	62	62	63	64	64	65	66	66	67	67	70	78	83	85	84	82	79	74
Tue	75	76	77	79	80	81	82	83	85	86	87	88	88	89	89	90	95	102	106	106	104	99	92	91

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	128.7Unhealthy for Sensitive Groups	179	51.6	168 / 168
Hai Phong	105.9Unhealthy for Sensitive Groups	152	37.4	168 / 168
Can Tho	84.6Moderate	151	25.1	168 / 168
Ho Chi Minh City	82Moderate	167	23	168 / 168
Hue	65.7Moderate	125	15.4	168 / 168
Da Nang	63.5Moderate	107	14	168 / 168
Nha Trang	54.1Moderate	64	11.6	168 / 168
Da Lat	49Good	70	10.1	168 / 168

City-hours by category

Good: 132

Moderate: 954

Unhealthy for Sensitive Groups: 184

Unhealthy: 74

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	88	88	87	87	87	87	87	86	87	86	86	85	85	85	85	87	89	93	97	97	94	89	86	83
Thu	82	82	81	80	80	79	78	78	77	77	78	78	78	79	79	80	83	91	96	95	91	85	79	78
Fri	78	78	78	78	78	78	79	79	78	78	77	77	77	76	76	79	83	87	90	89	85	79	76	76
Sat	76	76	76	76	77	77	77	78	77	77	77	76	76	75	75	75	75	76	77	77	76	76	76	76
Sun	77	77	76	76	75	74	73	72	72	71	70	70	70	69	69	69	69	72	75	75	73	70	65	64
Mon	63	63	62	62	62	62	62	62	63	64	64	65	66	66	67	67	70	78	83	85	84	82	79	74
Tue	75	76	77	79	80	81	82	83	85	86	87	88	88	89	89	90	95	102	106	106	104	99	92	91

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	88	88	87	87	87	87	87	86	87	86	86	85	85	85	85	87	89	93	97	97	94	89	86	83
Thu	82	82	81	80	80	79	78	78	77	77	78	78	78	79	79	80	83	91	96	95	91	85	79	78
Fri	78	78	78	78	78	78	79	79	78	78	77	77	77	76	76	79	83	87	90	89	85	79	76	76
Sat	76	76	76	76	77	77	77	78	77	77	77	76	76	75	75	75	75	76	77	77	76	76	76	76
Sun	77	77	76	76	75	74	73	72	72	71	70	70	70	69	69	69	69	72	75	75	73	70	65	64
Mon	63	63	62	62	62	62	62	62	63	64	64	65	66	66	67	67	70	78	83	85	84	82	79	74
Tue	75	76	77	79	80	81	82	83	85	86	87	88	88	89	89	90	95	102	106	106	104	99	92	91

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	88	88	87	87	87	87	87	86	87	86	86	85	85	85	85	87	89	93	97	97	94	89	86	83
Thu	82	82	81	80	80	79	78	78	77	77	78	78	78	79	79	80	83	91	96	95	91	85	79	78
Fri	78	78	78	78	78	78	79	79	78	78	77	77	77	76	76	79	83	87	90	89	85	79	76	76
Sat	76	76	76	76	77	77	77	78	77	77	77	76	76	75	75	75	75	76	77	77	76	76	76	76
Sun	77	77	76	76	75	74	73	72	72	71	70	70	70	69	69	69	69	72	75	75	73	70	65	64
Mon	63	63	62	62	62	62	62	62	63	64	64	65	66	66	67	67	70	78	83	85	84	82	79	74
Tue	75	76	77	79	80	81	82	83	85	86	87	88	88	89	89	90	95	102	106	106	104	99	92	91