18 – 24 Dec 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

92.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 31.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+23.6 AQI compared with the previous week’s mean of 69.1.

Highest hourly estimate: 187 in Hanoi · 23 Dec, 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, 18 Dec	87.2Moderate	32–177	26.8	192 / 192
Thu, 19 Dec	85.5Moderate	36–154	26.2	192 / 192
Fri, 20 Dec	87.6Moderate	36–168	31	192 / 192
Sat, 21 Dec	100.7Unhealthy for Sensitive Groups	46–173	37.4	192 / 192
Sun, 22 Dec	101.4Unhealthy for Sensitive Groups	45–175	35.2	192 / 192
Mon, 23 Dec	97.1Moderate	31–187	35.6	192 / 192
Tue, 24 Dec	89.2Moderate	23–186	30.5	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	89	89	89	89	89	88	88	87	87	87	87	86	86	86	86	85	85	85	86	87	87	88	89	89
Thu	89	89	89	88	88	88	87	86	85	84	83	83	83	83	84	85	86	86	86	87	86	85	84	83
Fri	82	82	82	82	82	82	82	83	83	84	85	86	87	87	89	90	91	92	95	96	96	95	95	95
Sat	96	96	96	96	96	97	98	98	99	100	100	100	101	101	102	103	103	105	106	107	106	105	105	104
Sun	104	104	105	105	105	105	104	104	103	103	102	101	101	100	100	99	99	99	99	99	99	99	99	100
Mon	99	99	99	98	97	97	97	97	97	97	98	98	98	98	98	97	98	97	97	96	96	95	95	94
Tue	93	93	92	92	91	91	90	90	89	88	88	88	88	88	88	88	88	89	89	89	88	88	87	87

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	163.5Unhealthy	187	76.3	168 / 168
Hai Phong	123.3Unhealthy for Sensitive Groups	156	47.8	168 / 168
Ho Chi Minh City	105.9Unhealthy for Sensitive Groups	143	34.8	168 / 168
Can Tho	100.5Unhealthy for Sensitive Groups	150	33.9	168 / 168
Hue	80.5Moderate	99	25.9	168 / 168
Da Nang	78Moderate	110	20.4	168 / 168
Nha Trang	50.4Moderate	59	9.8	168 / 168
Da Lat	39.2Good	52	5.7	168 / 168

City-hours by category

Good: 207

Moderate: 686

Unhealthy for Sensitive Groups: 264

Unhealthy: 187

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	89	89	89	89	89	88	88	87	87	87	87	86	86	86	86	85	85	85	86	87	87	88	89	89
Thu	89	89	89	88	88	88	87	86	85	84	83	83	83	83	84	85	86	86	86	87	86	85	84	83
Fri	82	82	82	82	82	82	82	83	83	84	85	86	87	87	89	90	91	92	95	96	96	95	95	95
Sat	96	96	96	96	96	97	98	98	99	100	100	100	101	101	102	103	103	105	106	107	106	105	105	104
Sun	104	104	105	105	105	105	104	104	103	103	102	101	101	100	100	99	99	99	99	99	99	99	99	100
Mon	99	99	99	98	97	97	97	97	97	97	98	98	98	98	98	97	98	97	97	96	96	95	95	94
Tue	93	93	92	92	91	91	90	90	89	88	88	88	88	88	88	88	88	89	89	89	88	88	87	87

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	89	89	89	89	89	88	88	87	87	87	87	86	86	86	86	85	85	85	86	87	87	88	89	89
Thu	89	89	89	88	88	88	87	86	85	84	83	83	83	83	84	85	86	86	86	87	86	85	84	83
Fri	82	82	82	82	82	82	82	83	83	84	85	86	87	87	89	90	91	92	95	96	96	95	95	95
Sat	96	96	96	96	96	97	98	98	99	100	100	100	101	101	102	103	103	105	106	107	106	105	105	104
Sun	104	104	105	105	105	105	104	104	103	103	102	101	101	100	100	99	99	99	99	99	99	99	99	100
Mon	99	99	99	98	97	97	97	97	97	97	98	98	98	98	98	97	98	97	97	96	96	95	95	94
Tue	93	93	92	92	91	91	90	90	89	88	88	88	88	88	88	88	88	89	89	89	88	88	87	87

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	89	89	89	89	89	88	88	87	87	87	87	86	86	86	86	85	85	85	86	87	87	88	89	89
Thu	89	89	89	88	88	88	87	86	85	84	83	83	83	83	84	85	86	86	86	87	86	85	84	83
Fri	82	82	82	82	82	82	82	83	83	84	85	86	87	87	89	90	91	92	95	96	96	95	95	95
Sat	96	96	96	96	96	97	98	98	99	100	100	100	101	101	102	103	103	105	106	107	106	105	105	104
Sun	104	104	105	105	105	105	104	104	103	103	102	101	101	100	100	99	99	99	99	99	99	99	99	100
Mon	99	99	99	98	97	97	97	97	97	97	98	98	98	98	98	97	98	97	97	96	96	95	95	94
Tue	93	93	92	92	91	91	90	90	89	88	88	88	88	88	88	88	88	89	89	89	88	88	87	87