20 – 26 Dec 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

64.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.9 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 60.1.

Highest hourly estimate: 164 in Hanoi · 26 Dec, 23:00 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, 20 Dec	59.8Moderate	27–95	16.1	192 / 192
Thu, 21 Dec	62.4Moderate	32–85	15.2	192 / 192
Fri, 22 Dec	61.6Moderate	30–90	15.5	192 / 192
Sat, 23 Dec	60.3Moderate	29–100	15.3	192 / 192
Sun, 24 Dec	60.5Moderate	28–103	17.1	192 / 192
Mon, 25 Dec	68.6Moderate	30–99	19.4	192 / 192
Tue, 26 Dec	75.7Moderate	29–164	26.7	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	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	59	59	60	60	60	61	62	63	63
Thu	64	64	64	63	63	63	62	62	61	61	61	61	61	62	62	63	63	63	64	64	63	63	62	61
Fri	61	61	61	61	61	62	61	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62
Sat	62	62	62	62	62	61	61	61	61	61	60	60	60	60	60	60	59	59	59	59	59	60	60	60
Sun	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	61	61	61	61	62	63	64
Mon	65	66	67	67	67	68	68	69	69	69	69	70	70	70	70	70	70	70	70	70	70	69	69	69
Tue	69	69	70	70	71	72	72	73	74	75	75	76	77	77	78	78	79	79	82	82	80	80	80	80

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	92.1Moderate	164	36.2	168 / 168
Hai Phong	73.2Moderate	86	22.5	168 / 168
Ho Chi Minh City	68.7Moderate	98	19.6	168 / 168
Hue	66.9Moderate	80	18.8	168 / 168
Da Nang	65.5Moderate	75	17.4	168 / 168
Can Tho	63.1Moderate	95	15.6	168 / 168
Nha Trang	51.4Moderate	61	10.9	168 / 168
Da Lat	32.1Good	43	2.4	168 / 168

City-hours by category

Good: 239

Moderate: 1072

Unhealthy for Sensitive Groups: 18

Unhealthy: 15

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	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	59	59	60	60	60	61	62	63	63
Thu	64	64	64	63	63	63	62	62	61	61	61	61	61	62	62	63	63	63	64	64	63	63	62	61
Fri	61	61	61	61	61	62	61	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62
Sat	62	62	62	62	62	61	61	61	61	61	60	60	60	60	60	60	59	59	59	59	59	60	60	60
Sun	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	61	61	61	61	62	63	64
Mon	65	66	67	67	67	68	68	69	69	69	69	70	70	70	70	70	70	70	70	70	70	69	69	69
Tue	69	69	70	70	71	72	72	73	74	75	75	76	77	77	78	78	79	79	82	82	80	80	80	80

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	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	59	59	60	60	60	61	62	63	63
Thu	64	64	64	63	63	63	62	62	61	61	61	61	61	62	62	63	63	63	64	64	63	63	62	61
Fri	61	61	61	61	61	62	61	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62
Sat	62	62	62	62	62	61	61	61	61	61	60	60	60	60	60	60	59	59	59	59	59	60	60	60
Sun	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	61	61	61	61	62	63	64
Mon	65	66	67	67	67	68	68	69	69	69	69	70	70	70	70	70	70	70	70	70	70	69	69	69
Tue	69	69	70	70	71	72	72	73	74	75	75	76	77	77	78	78	79	79	82	82	80	80	80	80

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	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	59	59	60	60	60	61	62	63	63
Thu	64	64	64	63	63	63	62	62	61	61	61	61	61	62	62	63	63	63	64	64	63	63	62	61
Fri	61	61	61	61	61	62	61	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62	62
Sat	62	62	62	62	62	61	61	61	61	61	60	60	60	60	60	60	59	59	59	59	59	60	60	60
Sun	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	61	61	61	61	62	63	64
Mon	65	66	67	67	67	68	68	69	69	69	69	70	70	70	70	70	70	70	70	70	70	69	69	69
Tue	69	69	70	70	71	72	72	73	74	75	75	76	77	77	78	78	79	79	82	82	80	80	80	80