24 – 30 Dec 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

78.2Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-2.7 AQI compared with the previous week’s mean of 80.9.

Highest hourly estimate: 190 in Hanoi · 29 Dec, 14:00 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, 24 Dec	68Moderate	21–150	17.6	192 / 192
Thu, 25 Dec	61.9Moderate	21–103	18	192 / 192
Fri, 26 Dec	71.8Moderate	31–113	24.7	192 / 192
Sat, 27 Dec	86.5Moderate	44–159	30.2	192 / 192
Sun, 28 Dec	89Moderate	44–169	29	192 / 192
Mon, 29 Dec	87.7Moderate	42–190	31.6	192 / 192
Tue, 30 Dec	82.7Moderate	43–181	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	75	74	73	73	72	71	71	70	69	68	68	67	67	67	66	66	66	66	66	65	64	64	63	63
Thu	62	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	62	62	62	63	63	63	64	65
Fri	65	67	68	68	69	70	70	71	71	71	71	71	71	71	72	72	73	74	74	75	76	77	79	80
Sat	80	81	81	81	82	83	84	84	85	86	87	88	88	88	89	89	90	90	90	90	90	90	90	90
Sun	90	90	90	90	90	90	90	90	90	90	90	89	89	89	89	88	88	89	90	90	89	87	86	85
Mon	85	85	85	85	85	85	86	86	87	88	88	88	88	88	89	90	90	91	92	92	89	88	88	88
Tue	87	87	87	86	85	85	84	84	83	82	81	81	81	81	81	80	81	81	84	84	83	81	79	78

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	126.1Unhealthy for Sensitive Groups	190	55.1	168 / 168
Can Tho	103.1Unhealthy for Sensitive Groups	150	34.7	168 / 168
Ho Chi Minh City	99.8Moderate	117	34.1	168 / 168
Hai Phong	82.6Moderate	116	26.8	168 / 168
Hue	64.5Moderate	80	16.8	168 / 168
Da Nang	59.6Moderate	69	13.7	168 / 168
Nha Trang	50.3Moderate	63	10.7	168 / 168
Da Lat	39.7Good	51	6.9	168 / 168

City-hours by category

Good: 217

Moderate: 826

Unhealthy for Sensitive Groups: 219

Unhealthy: 82

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	75	74	73	73	72	71	71	70	69	68	68	67	67	67	66	66	66	66	66	65	64	64	63	63
Thu	62	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	62	62	62	63	63	63	64	65
Fri	65	67	68	68	69	70	70	71	71	71	71	71	71	71	72	72	73	74	74	75	76	77	79	80
Sat	80	81	81	81	82	83	84	84	85	86	87	88	88	88	89	89	90	90	90	90	90	90	90	90
Sun	90	90	90	90	90	90	90	90	90	90	90	89	89	89	89	88	88	89	90	90	89	87	86	85
Mon	85	85	85	85	85	85	86	86	87	88	88	88	88	88	89	90	90	91	92	92	89	88	88	88
Tue	87	87	87	86	85	85	84	84	83	82	81	81	81	81	81	80	81	81	84	84	83	81	79	78

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	75	74	73	73	72	71	71	70	69	68	68	67	67	67	66	66	66	66	66	65	64	64	63	63
Thu	62	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	62	62	62	63	63	63	64	65
Fri	65	67	68	68	69	70	70	71	71	71	71	71	71	71	72	72	73	74	74	75	76	77	79	80
Sat	80	81	81	81	82	83	84	84	85	86	87	88	88	88	89	89	90	90	90	90	90	90	90	90
Sun	90	90	90	90	90	90	90	90	90	90	90	89	89	89	89	88	88	89	90	90	89	87	86	85
Mon	85	85	85	85	85	85	86	86	87	88	88	88	88	88	89	90	90	91	92	92	89	88	88	88
Tue	87	87	87	86	85	85	84	84	83	82	81	81	81	81	81	80	81	81	84	84	83	81	79	78

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	75	74	73	73	72	71	71	70	69	68	68	67	67	67	66	66	66	66	66	65	64	64	63	63
Thu	62	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	62	62	62	63	63	63	64	65
Fri	65	67	68	68	69	70	70	71	71	71	71	71	71	71	72	72	73	74	74	75	76	77	79	80
Sat	80	81	81	81	82	83	84	84	85	86	87	88	88	88	89	89	90	90	90	90	90	90	90	90
Sun	90	90	90	90	90	90	90	90	90	90	90	89	89	89	89	88	88	89	90	90	89	87	86	85
Mon	85	85	85	85	85	85	86	86	87	88	88	88	88	88	89	90	90	91	92	92	89	88	88	88
Tue	87	87	87	86	85	85	84	84	83	82	81	81	81	81	81	80	81	81	84	84	83	81	79	78