Yên Bái weather in April
In April, Yên Bái sees average daytime highs of 29°C and overnight lows near 22°C, with 126 mm of rain across 13.1 wet days and about 12.5 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.
Highs climb over the month, from about 27°C in the first days to 30°C by the end. The sky is clear or mostly clear about 11% of the time in April, and the air most often feels oppressive.
Daylight stretches from about 12 h 12 min at the start of April to 12 h 48 min by month's end. Set against the rest of the year, April is Yên Bái's 5th-clearest and 2nd-windiest month. For the whole year in context, see Yên Bái's year-round climate.
- Daytime high
- 29°
- 7th warmest
- Overnight low
- 22°
- 6th coldest
- Rainfall
- 126 mm
- 13.1 wet days
- Daylight
- 12 h 30 min
- 5:46 AM – 6:16 PM
- Cloud cover
- 74%
- 5th clearest
- Wind
- 5 km/h
- 2nd windiest
- Solar energy
- 3.94 kWh/m²
- Travel score
- 5.1
- out of 10
Yên Bái is provincial city in Yên Bái province, Vietnam.
- Density
- 942/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 27°C in the first days to 30°C by the end.
A typical April day in Yên Bái reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 33°C. Set against its neighbours, April runs about 4°C warmer than March and about 3°C cooler than May.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 20 |
| 2 | 26 | 20 |
| 3 | 27 | 20 |
| 4 | 27 | 20 |
| 5 | 27 | 21 |
| 6 | 27 | 21 |
| 7 | 27 | 21 |
| 8 | 28 | 21 |
| 9 | 28 | 21 |
| 10 | 28 | 21 |
| 11 | 28 | 21 |
| 12 | 28 | 21 |
| 13 | 28 | 22 |
| 14 | 29 | 22 |
| 15 | 29 | 22 |
| 16 | 29 | 22 |
| 17 | 29 | 22 |
| 18 | 29 | 22 |
| 19 | 29 | 22 |
| 20 | 29 | 22 |
| 21 | 30 | 23 |
| 22 | 30 | 23 |
| 23 | 30 | 23 |
| 24 | 30 | 23 |
| 25 | 30 | 23 |
| 26 | 30 | 23 |
| 27 | 30 | 23 |
| 28 | 30 | 23 |
| 29 | 30 | 23 |
| 30 | 30 | 23 |
How April really feels in Yên Bái
Once humidity and wind are folded in, April averages 13 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Yên Bái weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 20° / 14° | 43 | 8.9 | 10.8 | 6.1 |
| Feb | 21° / 16° | 33 | 7.3 | 11.3 | 6.5 |
| Mar | 24° / 18° | 70 | 10.5 | 11.8 | 6.4 |
| Apr | 29° / 22° | 126 | 13.1 | 12.5 | 5.1 |
| May | 31° / 25° | 294 | 20 | 13 | 3.3 |
| Jun | 32° / 26° | 398 | 23.2 | 13.3 | 2.4 |
| Jul | 32° / 26° | 407 | 25.6 | 13.2 | 2.3 |
| Aug | 32° / 26° | 415 | 25 | 12.7 | 2.5 |
| Sep | 31° / 25° | 229 | 19.6 | 12.1 | 3.3 |
| Oct | 29° / 23° | 115 | 12.5 | 11.5 | 5.4 |
| Nov | 25° / 19° | 64 | 8 | 11 | 7.0 |
| Dec | 21° / 16° | 42 | 7.9 | 10.7 | 6.7 |
Cloud cover in April
The sky is clear or mostly clear about 11% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 72%.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 25 | 26 | 26 | 27 | 27 | 27 | 28 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 30 | 31 | 30 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 |
| Cloudier (%) | 75 | 74 | 74 | 73 | 73 | 73 | 72 | 71 | 71 | 70 | 71 | 71 | 71 | 71 | 70 | 69 | 70 | 71 | 71 | 72 | 72 | 72 | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 71 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 25 | 75 |
| 2 | 26 | 74 |
| 3 | 26 | 74 |
| 4 | 27 | 73 |
| 5 | 27 | 73 |
| 6 | 27 | 73 |
| 7 | 28 | 72 |
| 8 | 29 | 71 |
| 9 | 29 | 71 |
| 10 | 30 | 70 |
| 11 | 29 | 71 |
| 12 | 29 | 71 |
| 13 | 29 | 71 |
| 14 | 29 | 71 |
| 15 | 30 | 70 |
| 16 | 31 | 69 |
| 17 | 30 | 70 |
| 18 | 29 | 71 |
| 19 | 29 | 71 |
| 20 | 28 | 72 |
| 21 | 28 | 72 |
| 22 | 28 | 72 |
| 23 | 27 | 73 |
| 24 | 27 | 73 |
| 25 | 28 | 72 |
| 26 | 28 | 72 |
| 27 | 28 | 72 |
| 28 | 29 | 71 |
| 29 | 29 | 71 |
| 30 | 29 | 71 |
Chance of precipitation in April
Yên Bái gets around 126 mm of rain over 13.1 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 43% and peaks near 52% on the wettest days. The odds climb toward the end of the month.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 41 | 41 | 42 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 |
| Rain chance (%) | |
|---|---|
| 1 | 41 |
| 2 | 41 |
| 3 | 42 |
| 4 | 42 |
| 5 | 42 |
| 6 | 42 |
| 7 | 42 |
| 8 | 41 |
| 9 | 41 |
| 10 | 41 |
| 11 | 41 |
| 12 | 40 |
| 13 | 40 |
| 14 | 40 |
| 15 | 40 |
| 16 | 40 |
| 17 | 41 |
| 18 | 41 |
| 19 | 42 |
| 20 | 42 |
| 21 | 43 |
| 22 | 44 |
| 23 | 45 |
| 24 | 46 |
| 25 | 47 |
| 26 | 48 |
| 27 | 49 |
| 28 | 50 |
| 29 | 51 |
| 30 | 52 |
Humidity in April
Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the oppressive band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 83% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 8 | 8 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Humid (%) | 20 | 20 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 13 | 12 | 12 | 11 | 10 | 10 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 |
| Muggy (%) | 33 | 32 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 |
| Oppressive (%) | 32 | 32 | 33 | 34 | 35 | 35 | 36 | 37 | 37 | 38 | 38 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 43 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 42 | 41 |
| Miserable (%) | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 | 12 | 13 | 15 | 16 | 18 | 19 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 33 | 34 | 35 | 37 | 38 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 4 | 8 | 20 | 33 | 32 | 3 |
| 2 | 4 | 8 | 20 | 32 | 32 | 4 |
| 3 | 3 | 7 | 19 | 33 | 33 | 5 |
| 4 | 3 | 6 | 19 | 32 | 34 | 6 |
| 5 | 3 | 6 | 18 | 31 | 35 | 7 |
| 6 | 2 | 6 | 18 | 30 | 35 | 8 |
| 7 | 2 | 5 | 18 | 29 | 36 | 10 |
| 8 | 2 | 5 | 17 | 28 | 37 | 11 |
| 9 | 2 | 5 | 17 | 27 | 37 | 12 |
| 10 | 1 | 5 | 17 | 26 | 38 | 13 |
| 11 | 1 | 5 | 16 | 25 | 38 | 15 |
| 12 | 1 | 5 | 15 | 24 | 39 | 16 |
| 13 | 1 | 4 | 15 | 23 | 40 | 18 |
| 14 | 1 | 4 | 14 | 22 | 40 | 19 |
| 15 | 1 | 4 | 14 | 21 | 40 | 21 |
| 16 | 0 | 4 | 13 | 20 | 41 | 22 |
| 17 | 0 | 3 | 12 | 20 | 41 | 23 |
| 18 | 0 | 3 | 12 | 19 | 41 | 24 |
| 19 | 0 | 3 | 11 | 19 | 42 | 25 |
| 20 | 0 | 2 | 10 | 19 | 42 | 26 |
| 21 | 0 | 2 | 10 | 18 | 43 | 27 |
| 22 | 0 | 2 | 9 | 18 | 44 | 28 |
| 23 | 0 | 1 | 8 | 18 | 44 | 29 |
| 24 | 0 | 1 | 7 | 17 | 44 | 30 |
| 25 | 0 | 1 | 7 | 17 | 44 | 31 |
| 26 | 0 | 1 | 6 | 17 | 44 | 33 |
| 27 | 0 | 1 | 6 | 16 | 43 | 34 |
| 28 | 0 | 0 | 5 | 16 | 43 | 35 |
| 29 | 0 | 0 | 5 | 16 | 42 | 37 |
| 30 | 0 | 0 | 4 | 16 | 41 | 38 |
Wind in April
Winds average 5 km/h in April.
Across April, daily wind ranges from about 5 km/h on the calmest days to 6 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | 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 |
Sunrise & sunset in April
Daylight runs from about 12 h 12 min at the start of April to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 36 minutes over April. Sunrise moves from 5:59 AM to 5:35 AM, and sunset from 6:11 PM to 6:21 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 |
| Sunrise (AM) | 5:59 | 5:58 | 5:57 | 5:57 | 5:56 | 5:55 | 5:54 | 5:53 | 5:52 | 5:51 | 5:50 | 5:49 | 5:48 | 5:47 | 5:46 | 5:46 | 5:45 | 5:44 | 5:43 | 5:42 | 5:41 | 5:41 | 5:40 | 5:39 | 5:38 | 5:37 | 5:37 | 5:36 | 5:35 | 5:35 |
| Sunset (PM) | 6:11 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:13 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 | 6:15 | 6:15 | 6:15 | 6:16 | 6:16 | 6:16 | 6:17 | 6:17 | 6:17 | 6:18 | 6:18 | 6:18 | 6:19 | 6:19 | 6:20 | 6:20 | 6:20 | 6:21 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.2 | 5:59 | 6:11 |
| 2 | 12.2 | 5:58 | 6:11 |
| 3 | 12.2 | 5:57 | 6:11 |
| 4 | 12.3 | 5:57 | 6:12 |
| 5 | 12.3 | 5:56 | 6:12 |
| 6 | 12.3 | 5:55 | 6:12 |
| 7 | 12.3 | 5:54 | 6:13 |
| 8 | 12.3 | 5:53 | 6:13 |
| 9 | 12.4 | 5:52 | 6:13 |
| 10 | 12.4 | 5:51 | 6:14 |
| 11 | 12.4 | 5:50 | 6:14 |
| 12 | 12.4 | 5:49 | 6:14 |
| 13 | 12.4 | 5:48 | 6:15 |
| 14 | 12.5 | 5:47 | 6:15 |
| 15 | 12.5 | 5:46 | 6:15 |
| 16 | 12.5 | 5:46 | 6:16 |
| 17 | 12.5 | 5:45 | 6:16 |
| 18 | 12.5 | 5:44 | 6:16 |
| 19 | 12.6 | 5:43 | 6:17 |
| 20 | 12.6 | 5:42 | 6:17 |
| 21 | 12.6 | 5:41 | 6:17 |
| 22 | 12.6 | 5:41 | 6:18 |
| 23 | 12.6 | 5:40 | 6:18 |
| 24 | 12.7 | 5:39 | 6:18 |
| 25 | 12.7 | 5:38 | 6:19 |
| 26 | 12.7 | 5:37 | 6:19 |
| 27 | 12.7 | 5:37 | 6:20 |
| 28 | 12.7 | 5:36 | 6:20 |
| 29 | 12.8 | 5:35 | 6:20 |
| 30 | 12.8 | 5:35 | 6:21 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 3.94 kWh/m².
For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 4.62 kWh/m² in June across the year — April's 3.94 kWh/m² falls in the middle.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.4 | 3.5 | 3.5 | 3.5 | 3.6 | 3.6 | 3.6 | 3.7 | 3.7 | 3.8 | 3.8 | 3.9 | 3.9 | 3.9 | 4.0 | 4.0 | 4.0 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 | 4.3 | 4.4 | 4.4 | 4.4 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.4 | Moderate |
| 2 | 3.5 | Moderate |
| 3 | 3.5 | Moderate |
| 4 | 3.5 | Moderate |
| 5 | 3.6 | Moderate |
| 6 | 3.6 | Moderate |
| 7 | 3.6 | Moderate |
| 8 | 3.7 | Moderate |
| 9 | 3.7 | Moderate |
| 10 | 3.8 | Moderate |
| 11 | 3.8 | Moderate |
| 12 | 3.9 | Moderate |
| 13 | 3.9 | Moderate |
| 14 | 3.9 | Moderate |
| 15 | 4.0 | Moderate |
| 16 | 4.0 | Bright |
| 17 | 4.0 | Bright |
| 18 | 4.1 | Bright |
| 19 | 4.1 | Bright |
| 20 | 4.1 | Bright |
| 21 | 4.2 | Bright |
| 22 | 4.2 | Bright |
| 23 | 4.2 | Bright |
| 24 | 4.3 | Bright |
| 25 | 4.3 | Bright |
| 26 | 4.3 | Bright |
| 27 | 4.3 | Bright |
| 28 | 4.4 | Bright |
| 29 | 4.4 | Bright |
| 30 | 4.4 | Bright |
Hazard calendar for Yên Bái
In April, Yên Bái sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yên Bái sits in the Pacific typhoon belt; the season peaks July–October.
Yên Bái's monsoon runs May–September, when most of the year's rain falls.
Is April a good time to visit Yên Bái?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a reasonable time to visit Yên Bái for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Yên Bái in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Yên Bái sees daytime highs around 29°C and nights near 22°C. Pack light clothes. Worth having: rain gear. About 13 days see rain.
UV index in Yên Bái in April
Clear-sky midday UV in April 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 Yên Bái peaks around June 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 19 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 | 10 | 6 | 8 | 13 | 12 | 11 | 8 | 7 | 5 | 6 |
| Level | High | High | Very high | High | Very high | Extreme | Extreme | Extreme | Very high | High | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 7 | High |
| Mar | 10 | Very high |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 8 | Very high |
| Oct | 7 | High |
| Nov | 5 | High |
| Dec | 6 | High |
Air quality in Yên Bái in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in Yên Bái is worst in December — around 83 µg/m³ PM2.5 (unhealthy), about 2.9× the cleanest month (July, 29 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) | 83 | 78 | 78 | 72 | 50 | 36 | 29 | 32 | 42 | 57 | 73 | 83 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Moderate | Moderate | Poor | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 83 | Unhealthy |
| Feb | 78 | Unhealthy |
| Mar | 78 | Unhealthy |
| Apr | 72 | Unhealthy |
| May | 50 | Poor |
| Jun | 36 | Poor |
| Jul | 29 | Moderate |
| Aug | 32 | Moderate |
| Sep | 42 | Poor |
| Oct | 57 | Unhealthy |
| Nov | 73 | Unhealthy |
| Dec | 83 | Unhealthy |
Where is Yên Bái?
Yên Bái sits at 21.7°N, 104.9°E, 45 m above sea level, in Vietnam. The nearest listed city is Tuyên Quang, 33 km away.
Topography around Yên Bái
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yên Bái.
Within 3 km, the terrain around Yên Bái has only modest variations in elevation — a maximum elevation change of 126 m around an average of 63 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 707 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,934 m.
The land around Yên Bái is covered by trees (79%) within 3 km, trees (80%) within 16 km, and trees (86%) 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 Yên Bái (21.7229°, 104.9113°, elevation 45 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).