25 – 31 Dec 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

88.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 30.9 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 92.7.

Highest hourly estimate: 184 in Hanoi · 25 Dec, 20:00 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, 25 Dec	88.3Moderate	24–184	31.4	192 / 192
Thu, 26 Dec	82.8Moderate	18–182	27.7	192 / 192
Fri, 27 Dec	79.6Moderate	20–167	24.1	192 / 192
Sat, 28 Dec	79Moderate	21–134	28.5	192 / 192
Sun, 29 Dec	96.6Moderate	35–161	34.5	192 / 192
Mon, 30 Dec	98.3Moderate	31–166	34.6	192 / 192
Tue, 31 Dec	96.1Moderate	29–168	35.4	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	87	87	87	87	87	88	88	88	88	89	89	89	89	89	90	90	90	90	90	89	89	88	87	87
Thu	86	85	84	83	83	82	82	82	82	82	82	82	82	82	83	83	84	84	84	83	83	82	82	81
Fri	81	81	81	80	80	80	80	80	79	79	79	79	79	79	79	79	79	80	80	81	80	80	79	78
Sat	78	77	77	77	77	78	78	78	78	78	78	79	78	79	79	79	79	78	78	79	80	82	84	87
Sun	89	91	92	93	95	95	96	97	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99
Mon	98	98	98	98	98	98	98	98	98	98	99	98	98	99	99	99	99	99	99	98	98	98	99	99
Tue	99	99	99	98	97	97	96	96	95	95	95	95	95	95	95	95	94	94	95	96	96	97	97	97

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	156.4Unhealthy	184	69.6	168 / 168
Hai Phong	140.4Unhealthy for Sensitive Groups	168	56.4	168 / 168
Ho Chi Minh City	88.4Moderate	147	29.7	168 / 168
Hue	86Moderate	112	27.5	168 / 168
Can Tho	85.8Moderate	127	28.1	168 / 168
Da Nang	80.6Moderate	119	24.5	168 / 168
Nha Trang	42Good	60	8.3	168 / 168
Da Lat	29.6Good	39	2.9	168 / 168

City-hours by category

Good: 278

Moderate: 591

Unhealthy for Sensitive Groups: 300

Unhealthy: 175

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	87	87	87	87	87	88	88	88	88	89	89	89	89	89	90	90	90	90	90	89	89	88	87	87
Thu	86	85	84	83	83	82	82	82	82	82	82	82	82	82	83	83	84	84	84	83	83	82	82	81
Fri	81	81	81	80	80	80	80	80	79	79	79	79	79	79	79	79	79	80	80	81	80	80	79	78
Sat	78	77	77	77	77	78	78	78	78	78	78	79	78	79	79	79	79	78	78	79	80	82	84	87
Sun	89	91	92	93	95	95	96	97	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99
Mon	98	98	98	98	98	98	98	98	98	98	99	98	98	99	99	99	99	99	99	98	98	98	99	99
Tue	99	99	99	98	97	97	96	96	95	95	95	95	95	95	95	95	94	94	95	96	96	97	97	97

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	87	87	87	87	87	88	88	88	88	89	89	89	89	89	90	90	90	90	90	89	89	88	87	87
Thu	86	85	84	83	83	82	82	82	82	82	82	82	82	82	83	83	84	84	84	83	83	82	82	81
Fri	81	81	81	80	80	80	80	80	79	79	79	79	79	79	79	79	79	80	80	81	80	80	79	78
Sat	78	77	77	77	77	78	78	78	78	78	78	79	78	79	79	79	79	78	78	79	80	82	84	87
Sun	89	91	92	93	95	95	96	97	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99
Mon	98	98	98	98	98	98	98	98	98	98	99	98	98	99	99	99	99	99	99	98	98	98	99	99
Tue	99	99	99	98	97	97	96	96	95	95	95	95	95	95	95	95	94	94	95	96	96	97	97	97

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	87	87	87	87	87	88	88	88	88	89	89	89	89	89	90	90	90	90	90	89	89	88	87	87
Thu	86	85	84	83	83	82	82	82	82	82	82	82	82	82	83	83	84	84	84	83	83	82	82	81
Fri	81	81	81	80	80	80	80	80	79	79	79	79	79	79	79	79	79	80	80	81	80	80	79	78
Sat	78	77	77	77	77	78	78	78	78	78	78	79	78	79	79	79	79	78	78	79	80	82	84	87
Sun	89	91	92	93	95	95	96	97	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99
Mon	98	98	98	98	98	98	98	98	98	98	99	98	98	99	99	99	99	99	99	98	98	98	99	99
Tue	99	99	99	98	97	97	96	96	95	95	95	95	95	95	95	95	94	94	95	96	96	97	97	97