17 – 23 Dec 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

80.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 25.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+2.5 AQI compared with the previous week’s mean of 78.4.

Highest hourly estimate: 166 in Hanoi · 19 Dec, 16:00 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, 17 Dec	77.5Moderate	28–154	21.7	192 / 192
Thu, 18 Dec	74.3Moderate	28–146	25.2	192 / 192
Fri, 19 Dec	87.1Moderate	24–166	29.8	192 / 192
Sat, 20 Dec	85.8Moderate	24–160	27.6	192 / 192
Sun, 21 Dec	82.9Moderate	21–155	26.5	192 / 192
Mon, 22 Dec	80.8Moderate	22–153	24.4	192 / 192
Tue, 23 Dec	78.1Moderate	27–152	22.4	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	75	75	75	76	76	77	77	78	78	78	78	78	78	78	78	78	79	79	81	81	80	77	76	75
Thu	74	73	72	72	72	72	72	72	72	73	73	74	74	74	74	74	74	75	76	78	78	77	78	79
Fri	80	81	82	83	84	85	87	88	88	88	88	89	89	89	89	90	90	91	91	90	89	88	87	87
Sat	87	86	86	85	85	85	84	84	86	87	87	87	87	87	87	86	86	86	85	85	85	85	85	86
Sun	86	87	86	86	86	85	84	84	83	82	81	81	81	81	81	81	82	82	82	82	82	82	82	82
Mon	82	82	81	81	81	80	80	79	79	78	79	79	80	81	82	82	83	83	84	83	82	81	80	79
Tue	78	78	78	78	78	78	79	79	79	79	79	79	79	78	78	79	79	78	78	77	77	77	76	75

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	137Unhealthy for Sensitive Groups	166	50.4	168 / 168
Can Tho	129.2Unhealthy for Sensitive Groups	154	48.8	168 / 168
Ho Chi Minh City	105.4Unhealthy for Sensitive Groups	138	37.6	168 / 168
Hai Phong	81.4Moderate	97	24.8	168 / 168
Hue	64.5Moderate	86	16.6	168 / 168
Da Nang	59.6Moderate	75	13.7	168 / 168
Nha Trang	40.6Good	52	7.1	168 / 168
Da Lat	29.7Good	36	4	168 / 168

City-hours by category

Good: 337

Moderate: 634

Unhealthy for Sensitive Groups: 248

Unhealthy: 125

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	75	75	76	76	77	77	78	78	78	78	78	78	78	78	78	79	79	81	81	80	77	76	75
Thu	74	73	72	72	72	72	72	72	72	73	73	74	74	74	74	74	74	75	76	78	78	77	78	79
Fri	80	81	82	83	84	85	87	88	88	88	88	89	89	89	89	90	90	91	91	90	89	88	87	87
Sat	87	86	86	85	85	85	84	84	86	87	87	87	87	87	87	86	86	86	85	85	85	85	85	86
Sun	86	87	86	86	86	85	84	84	83	82	81	81	81	81	81	81	82	82	82	82	82	82	82	82
Mon	82	82	81	81	81	80	80	79	79	78	79	79	80	81	82	82	83	83	84	83	82	81	80	79
Tue	78	78	78	78	78	78	79	79	79	79	79	79	79	78	78	79	79	78	78	77	77	77	76	75

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	75	75	76	76	77	77	78	78	78	78	78	78	78	78	78	79	79	81	81	80	77	76	75
Thu	74	73	72	72	72	72	72	72	72	73	73	74	74	74	74	74	74	75	76	78	78	77	78	79
Fri	80	81	82	83	84	85	87	88	88	88	88	89	89	89	89	90	90	91	91	90	89	88	87	87
Sat	87	86	86	85	85	85	84	84	86	87	87	87	87	87	87	86	86	86	85	85	85	85	85	86
Sun	86	87	86	86	86	85	84	84	83	82	81	81	81	81	81	81	82	82	82	82	82	82	82	82
Mon	82	82	81	81	81	80	80	79	79	78	79	79	80	81	82	82	83	83	84	83	82	81	80	79
Tue	78	78	78	78	78	78	79	79	79	79	79	79	79	78	78	79	79	78	78	77	77	77	76	75

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	75	75	76	76	77	77	78	78	78	78	78	78	78	78	78	79	79	81	81	80	77	76	75
Thu	74	73	72	72	72	72	72	72	72	73	73	74	74	74	74	74	74	75	76	78	78	77	78	79
Fri	80	81	82	83	84	85	87	88	88	88	88	89	89	89	89	90	90	91	91	90	89	88	87	87
Sat	87	86	86	85	85	85	84	84	86	87	87	87	87	87	87	86	86	86	85	85	85	85	85	86
Sun	86	87	86	86	86	85	84	84	83	82	81	81	81	81	81	81	82	82	82	82	82	82	82	82
Mon	82	82	81	81	81	80	80	79	79	78	79	79	80	81	82	82	83	83	84	83	82	81	80	79
Tue	78	78	78	78	78	78	79	79	79	79	79	79	79	78	78	79	79	78	78	77	77	77	76	75