Ba Vì weather in December
In December, Ba Vì sees average daytime highs of 21°C and overnight lows near 15°C, with 33 mm of rain across 6.3 wet days and about 10.7 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.
Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 28% of the time in December, and the air most often feels dry.
Daylight stretches from about 10 h 48 min at the start of December to 10 h 42 min by month's end. Set against the rest of the year, December is Ba Vì's 3rd-clearest and 11th-windiest month. For the whole year in context, see Ba Vì's year-round climate.
- Daytime high
- 21°
- 11th warmest
- Overnight low
- 15°
- 2nd coldest
- Rainfall
- 33 mm
- 6.3 wet days
- Daylight
- 10 h 42 min
- 6:33 AM – 5:16 PM
- Cloud cover
- 62%
- 3rd clearest
- Wind
- 5 km/h
- 11th windiest
- Solar energy
- 2.58 kWh/m²
- Travel score
- 7.0
- out of 10
Temperature in December
Highs ease over the month, from about 23°C in the first days to 20°C by the end.
A typical December day in Ba Vì reaches about 21°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 26°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 |
| Avg low (°C) | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 17 |
| 2 | 23 | 17 |
| 3 | 23 | 17 |
| 4 | 22 | 17 |
| 5 | 22 | 16 |
| 6 | 22 | 16 |
| 7 | 22 | 16 |
| 8 | 22 | 16 |
| 9 | 22 | 16 |
| 10 | 22 | 16 |
| 11 | 22 | 16 |
| 12 | 21 | 16 |
| 13 | 21 | 15 |
| 14 | 21 | 15 |
| 15 | 21 | 15 |
| 16 | 21 | 15 |
| 17 | 21 | 15 |
| 18 | 21 | 15 |
| 19 | 21 | 15 |
| 20 | 21 | 15 |
| 21 | 21 | 15 |
| 22 | 21 | 15 |
| 23 | 21 | 15 |
| 24 | 21 | 14 |
| 25 | 21 | 14 |
| 26 | 21 | 14 |
| 27 | 21 | 14 |
| 28 | 21 | 14 |
| 29 | 20 | 14 |
| 30 | 20 | 14 |
| 31 | 20 | 14 |
How December really feels in Ba Vì
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ba Vì weather by month
How December compares with the rest of the year at a glance. December is the 11th-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 20° / 14° | 37 | 7.6 | 10.9 | 6.3 |
| Feb | 22° / 16° | 24 | 6.5 | 11.3 | 6.6 |
| Mar | 24° / 18° | 51 | 9 | 11.9 | 6.7 |
| Apr | 29° / 22° | 104 | 11.1 | 12.5 | 5.3 |
| May | 32° / 25° | 244 | 18.3 | 13 | 3.3 |
| Jun | 33° / 26° | 231 | 19 | 13.3 | 2.5 |
| Jul | 33° / 26° | 278 | 21.1 | 13.2 | 2.6 |
| Aug | 32° / 26° | 330 | 22.9 | 12.7 | 2.7 |
| Sep | 31° / 25° | 236 | 18.5 | 12.1 | 3.6 |
| Oct | 28° / 22° | 133 | 12 | 11.5 | 5.6 |
| Nov | 25° / 19° | 58 | 7.4 | 11 | 7.2 |
| Dec | 21° / 15° | 33 | 6.3 | 10.7 | 7.0 |
Cloud cover in December
The sky is clear or mostly clear about 28% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 57%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 44 | 44 | 44 | 43 | 43 | 42 | 43 | 43 | 42 | 43 | 43 | 43 | 44 | 44 | 45 | 44 | 45 | 45 | 45 | 46 | 45 | 44 | 44 | 43 | 42 | 41 | 40 | 38 | 37 | 35 | 34 |
| Cloudier (%) | 56 | 56 | 56 | 57 | 57 | 58 | 57 | 57 | 58 | 57 | 57 | 57 | 56 | 56 | 55 | 56 | 55 | 55 | 55 | 54 | 55 | 56 | 56 | 57 | 58 | 59 | 60 | 62 | 63 | 65 | 66 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 44 | 56 |
| 2 | 44 | 56 |
| 3 | 44 | 56 |
| 4 | 43 | 57 |
| 5 | 43 | 57 |
| 6 | 42 | 58 |
| 7 | 43 | 57 |
| 8 | 43 | 57 |
| 9 | 42 | 58 |
| 10 | 43 | 57 |
| 11 | 43 | 57 |
| 12 | 43 | 57 |
| 13 | 44 | 56 |
| 14 | 44 | 56 |
| 15 | 45 | 55 |
| 16 | 44 | 56 |
| 17 | 45 | 55 |
| 18 | 45 | 55 |
| 19 | 45 | 55 |
| 20 | 46 | 54 |
| 21 | 45 | 55 |
| 22 | 44 | 56 |
| 23 | 44 | 56 |
| 24 | 43 | 57 |
| 25 | 42 | 58 |
| 26 | 41 | 59 |
| 27 | 40 | 60 |
| 28 | 38 | 62 |
| 29 | 37 | 63 |
| 30 | 35 | 65 |
| 31 | 34 | 66 |
Chance of precipitation in December
Ba Vì gets around 33 mm of rain over 6.3 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 21% and peaks near 24% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 20 | 21 | 21 | 22 | 23 | 23 | 24 |
| Rain chance (%) | |
|---|---|
| 1 | 24 |
| 2 | 23 |
| 3 | 23 |
| 4 | 23 |
| 5 | 22 |
| 6 | 22 |
| 7 | 22 |
| 8 | 21 |
| 9 | 21 |
| 10 | 20 |
| 11 | 20 |
| 12 | 19 |
| 13 | 19 |
| 14 | 19 |
| 15 | 18 |
| 16 | 18 |
| 17 | 18 |
| 18 | 18 |
| 19 | 18 |
| 20 | 18 |
| 21 | 19 |
| 22 | 19 |
| 23 | 19 |
| 24 | 19 |
| 25 | 20 |
| 26 | 21 |
| 27 | 21 |
| 28 | 22 |
| 29 | 23 |
| 30 | 23 |
| 31 | 24 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the dry band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 22 | 23 | 24 | 25 | 26 | 28 | 29 | 30 | 32 | 33 | 35 | 36 | 38 | 39 | 40 | 41 | 42 | 43 | 43 | 44 | 44 | 45 | 45 | 45 | 45 | 45 | 44 | 44 | 43 | 43 | 42 |
| Comfortable (%) | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 30 | 30 | 29 | 29 | 28 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 |
| Humid (%) | 26 | 25 | 25 | 25 | 24 | 24 | 23 | 22 | 21 | 20 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 20 | 20 | 21 | 22 | 23 | 23 | 24 | 25 | 25 | 25 | 25 |
| Muggy (%) | 20 | 19 | 18 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 11 | 12 |
| Oppressive (%) | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 22 | 26 | 26 | 20 | 7 |
| 2 | 23 | 26 | 25 | 19 | 7 |
| 3 | 24 | 27 | 25 | 18 | 6 |
| 4 | 25 | 27 | 25 | 17 | 6 |
| 5 | 26 | 28 | 24 | 16 | 5 |
| 6 | 28 | 28 | 24 | 16 | 5 |
| 7 | 29 | 29 | 23 | 15 | 4 |
| 8 | 30 | 29 | 22 | 15 | 4 |
| 9 | 32 | 30 | 21 | 14 | 3 |
| 10 | 33 | 30 | 20 | 14 | 3 |
| 11 | 35 | 29 | 19 | 14 | 2 |
| 12 | 36 | 29 | 19 | 14 | 2 |
| 13 | 38 | 28 | 18 | 14 | 2 |
| 14 | 39 | 27 | 18 | 14 | 1 |
| 15 | 40 | 27 | 18 | 14 | 1 |
| 16 | 41 | 26 | 18 | 14 | 1 |
| 17 | 42 | 25 | 18 | 14 | 1 |
| 18 | 43 | 25 | 18 | 14 | 1 |
| 19 | 43 | 24 | 19 | 13 | 1 |
| 20 | 44 | 23 | 19 | 13 | 1 |
| 21 | 44 | 23 | 20 | 12 | 1 |
| 22 | 45 | 23 | 20 | 12 | 1 |
| 23 | 45 | 22 | 21 | 11 | 1 |
| 24 | 45 | 22 | 22 | 11 | 0 |
| 25 | 45 | 22 | 23 | 10 | 0 |
| 26 | 45 | 21 | 23 | 10 | 0 |
| 27 | 44 | 21 | 24 | 10 | 0 |
| 28 | 44 | 21 | 25 | 10 | 0 |
| 29 | 43 | 21 | 25 | 11 | 0 |
| 30 | 43 | 21 | 25 | 11 | 0 |
| 31 | 42 | 21 | 25 | 12 | 0 |
Wind in December
Winds average 5 km/h in December.
Across December, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in December
Daylight runs from about 10 h 48 min at the start of December to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 6 minutes over December. Sunrise moves from 6:24 AM to 6:40 AM, and sunset from 5:13 PM to 5:24 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.8 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 |
| Sunrise (AM) | 6:24 | 6:25 | 6:25 | 6:26 | 6:26 | 6:27 | 6:28 | 6:28 | 6:29 | 6:29 | 6:30 | 6:31 | 6:31 | 6:32 | 6:32 | 6:33 | 6:33 | 6:34 | 6:34 | 6:35 | 6:35 | 6:36 | 6:36 | 6:37 | 6:37 | 6:38 | 6:38 | 6:39 | 6:39 | 6:39 | 6:40 |
| Sunset (PM) | 5:13 | 5:13 | 5:13 | 5:13 | 5:13 | 5:13 | 5:14 | 5:14 | 5:14 | 5:14 | 5:15 | 5:15 | 5:15 | 5:16 | 5:16 | 5:16 | 5:17 | 5:17 | 5:18 | 5:18 | 5:18 | 5:19 | 5:19 | 5:20 | 5:20 | 5:21 | 5:21 | 5:22 | 5:23 | 5:23 | 5:24 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.8 | 6:24 | 5:13 |
| 2 | 10.8 | 6:25 | 5:13 |
| 3 | 10.8 | 6:25 | 5:13 |
| 4 | 10.8 | 6:26 | 5:13 |
| 5 | 10.8 | 6:26 | 5:13 |
| 6 | 10.8 | 6:27 | 5:13 |
| 7 | 10.8 | 6:28 | 5:14 |
| 8 | 10.8 | 6:28 | 5:14 |
| 9 | 10.8 | 6:29 | 5:14 |
| 10 | 10.7 | 6:29 | 5:14 |
| 11 | 10.7 | 6:30 | 5:15 |
| 12 | 10.7 | 6:31 | 5:15 |
| 13 | 10.7 | 6:31 | 5:15 |
| 14 | 10.7 | 6:32 | 5:16 |
| 15 | 10.7 | 6:32 | 5:16 |
| 16 | 10.7 | 6:33 | 5:16 |
| 17 | 10.7 | 6:33 | 5:17 |
| 18 | 10.7 | 6:34 | 5:17 |
| 19 | 10.7 | 6:34 | 5:18 |
| 20 | 10.7 | 6:35 | 5:18 |
| 21 | 10.7 | 6:35 | 5:18 |
| 22 | 10.7 | 6:36 | 5:19 |
| 23 | 10.7 | 6:36 | 5:19 |
| 24 | 10.7 | 6:37 | 5:20 |
| 25 | 10.7 | 6:37 | 5:20 |
| 26 | 10.7 | 6:38 | 5:21 |
| 27 | 10.7 | 6:38 | 5:21 |
| 28 | 10.7 | 6:39 | 5:22 |
| 29 | 10.7 | 6:39 | 5:23 |
| 30 | 10.7 | 6:39 | 5:23 |
| 31 | 10.7 | 6:40 | 5:24 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 2.58 kWh/m².
For context, solar energy here swings from a low near 2.17 kWh/m² to a high of 4.87 kWh/m² in June across the year — December's 2.58 kWh/m² sits near the bottom.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 2.7 | 2.7 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.5 | 2.5 | 2.5 | 2.5 | 2.4 | 2.4 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 2.7 | Moderate |
| 2 | 2.7 | Moderate |
| 3 | 2.6 | Moderate |
| 4 | 2.6 | Moderate |
| 5 | 2.6 | Moderate |
| 6 | 2.6 | Moderate |
| 7 | 2.6 | Moderate |
| 8 | 2.6 | Moderate |
| 9 | 2.6 | Moderate |
| 10 | 2.6 | Moderate |
| 11 | 2.6 | Moderate |
| 12 | 2.6 | Moderate |
| 13 | 2.6 | Moderate |
| 14 | 2.6 | Moderate |
| 15 | 2.6 | Moderate |
| 16 | 2.6 | Moderate |
| 17 | 2.6 | Moderate |
| 18 | 2.6 | Moderate |
| 19 | 2.6 | Moderate |
| 20 | 2.6 | Moderate |
| 21 | 2.6 | Moderate |
| 22 | 2.6 | Moderate |
| 23 | 2.6 | Moderate |
| 24 | 2.6 | Moderate |
| 25 | 2.6 | Moderate |
| 26 | 2.5 | Moderate |
| 27 | 2.5 | Moderate |
| 28 | 2.5 | Moderate |
| 29 | 2.5 | Moderate |
| 30 | 2.4 | Moderate |
| 31 | 2.4 | Moderate |
Hazard calendar for Ba Vì
None of Ba Vì's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Ba Vì's monsoon runs May–September, when most of the year's rain falls.
Is December a good time to visit Ba Vì?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is one of the better times to visit Ba Vì for general sightseeing.
What to pack for Ba Vì in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Ba Vì sees daytime highs around 21°C and nights near 15°C. Little to plan around — just the basics. About 6 days see rain.
UV index in Ba Vì in December
Clear-sky midday UV in December peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ba Vì peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 20 at about 5 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 6 | 7 | 8 | 6 | 8 | 12 | 11 | 11 | 6 | 7 | 5 | 6 |
| Level | High | High | Very high | High | Very high | Extreme | Extreme | Extreme | High | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 7 | High |
| Mar | 8 | Very high |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 6 | High |
| Oct | 7 | Very high |
| Nov | 5 | High |
| Dec | 6 | High |
Air quality in Ba Vì in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Ba Vì is worst in December — around 171 µg/m³ PM2.5 (very unhealthy), about 3.4× the cleanest month (July, 50 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 161 | 136 | 122 | 106 | 76 | 59 | 50 | 68 | 96 | 125 | 152 | 171 |
| Level | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 161 | Very unhealthy |
| Feb | 136 | Unhealthy |
| Mar | 122 | Unhealthy |
| Apr | 106 | Unhealthy |
| May | 76 | Unhealthy |
| Jun | 59 | Unhealthy |
| Jul | 50 | Poor |
| Aug | 68 | Unhealthy |
| Sep | 96 | Unhealthy |
| Oct | 125 | Unhealthy |
| Nov | 152 | Very unhealthy |
| Dec | 171 | Very unhealthy |
Where is Ba Vì?
Ba Vì sits at 21.1°N, 105.4°E, 322 m above sea level, in Vietnam. The nearest listed city is Sơn Tây, 14 km away.
Topography around Ba Vì
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ba Vì.
Within 3 km, the terrain around Ba Vì has large variations in elevation — a maximum elevation change of 1,193 m around an average of 262 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,256 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,753 m.
The land around Ba Vì is covered by trees (94%) within 3 km, trees (67%) within 16 km, and trees (68%) within 80 km.
Vietnam travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C / F
- 220 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,066
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Safe drinking water
- 59%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2011
- Road deaths
- 30.6
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 500
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ba Vì (21.0833°, 105.3833°, elevation 322 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).