Bỉm Sơn weather in April
In April, Bỉm Sơn sees average daytime highs of 29°C and overnight lows near 22°C, with 64 mm of rain across 8.6 wet days and about 12.4 hours of daylight. It is the 6th-warmest and 7th-wettest month of the year here.
Highs climb over the month, from about 27°C in the first days to 31°C by the end. The sky is clear or mostly clear about 15% 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 42 min by month's end. Set against the rest of the year, April is Bỉm Sơn's 4th-clearest and 4th-windiest month. For the whole year in context, see Bỉm Sơn's year-round climate.
- Daytime high
- 29°
- 6th warmest
- Overnight low
- 22°
- 6th coldest
- Rainfall
- 64 mm
- 8.6 wet days
- Daylight
- 12 h 30 min
- 5:43 AM – 6:11 PM
- Cloud cover
- 72%
- 4th clearest
- Wind
- 9 km/h
- 4th windiest
- Solar energy
- 4.55 kWh/m²
- Travel score
- 5.5
- out of 10
Bỉm Sơn is district-level town in Thanh Hóa province, Vietnam.
- Density
- 802/km²
- people per km²
- Founded
- 1981
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 31°C by the end.
A typical April day in Bỉm Sơn 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 24°C and 34°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) | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 21 |
| 2 | 27 | 21 |
| 3 | 27 | 21 |
| 4 | 27 | 21 |
| 5 | 27 | 21 |
| 6 | 27 | 21 |
| 7 | 28 | 21 |
| 8 | 28 | 21 |
| 9 | 28 | 22 |
| 10 | 28 | 22 |
| 11 | 28 | 22 |
| 12 | 29 | 22 |
| 13 | 29 | 22 |
| 14 | 29 | 22 |
| 15 | 29 | 22 |
| 16 | 29 | 23 |
| 17 | 29 | 23 |
| 18 | 30 | 23 |
| 19 | 30 | 23 |
| 20 | 30 | 23 |
| 21 | 30 | 23 |
| 22 | 30 | 23 |
| 23 | 30 | 23 |
| 24 | 30 | 23 |
| 25 | 30 | 24 |
| 26 | 31 | 24 |
| 27 | 31 | 24 |
| 28 | 31 | 24 |
| 29 | 31 | 24 |
| 30 | 31 | 24 |
How April really feels in Bỉm Sơn
Once humidity and wind are folded in, April averages 16 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.
Bỉm Sơn weather by month
How April compares with the rest of the year at a glance. April is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 21° / 15° | 29 | 5.6 | 10.9 | 6.7 |
| Feb | 22° / 16° | 17 | 4.4 | 11.3 | 7.0 |
| Mar | 25° / 19° | 35 | 6.7 | 11.9 | 7.0 |
| Apr | 29° / 22° | 64 | 8.6 | 12.4 | 5.5 |
| May | 32° / 25° | 178 | 15.5 | 12.9 | 3.3 |
| Jun | 34° / 27° | 178 | 14.6 | 13.2 | 2.5 |
| Jul | 33° / 27° | 234 | 17.8 | 13.1 | 2.5 |
| Aug | 32° / 26° | 324 | 23 | 12.7 | 2.6 |
| Sep | 31° / 25° | 278 | 20.8 | 12.1 | 3.2 |
| Oct | 29° / 23° | 156 | 14.5 | 11.5 | 5.1 |
| Nov | 26° / 19° | 57 | 7.9 | 11 | 6.9 |
| Dec | 22° / 16° | 25 | 5.4 | 10.8 | 7.1 |
Cloud cover in April
The sky is clear or mostly clear about 15% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 13% 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 (%) | 23 | 24 | 24 | 25 | 25 | 25 | 26 | 26 | 27 | 27 | 28 | 28 | 30 | 31 | 31 | 31 | 32 | 31 | 30 | 30 | 31 | 31 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Cloudier (%) | 77 | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 73 | 73 | 72 | 72 | 70 | 69 | 69 | 69 | 68 | 69 | 70 | 70 | 69 | 69 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 23 | 77 |
| 2 | 24 | 76 |
| 3 | 24 | 76 |
| 4 | 25 | 75 |
| 5 | 25 | 75 |
| 6 | 25 | 75 |
| 7 | 26 | 74 |
| 8 | 26 | 74 |
| 9 | 27 | 73 |
| 10 | 27 | 73 |
| 11 | 28 | 72 |
| 12 | 28 | 72 |
| 13 | 30 | 70 |
| 14 | 31 | 69 |
| 15 | 31 | 69 |
| 16 | 31 | 69 |
| 17 | 32 | 68 |
| 18 | 31 | 69 |
| 19 | 30 | 70 |
| 20 | 30 | 70 |
| 21 | 31 | 69 |
| 22 | 31 | 69 |
| 23 | 29 | 71 |
| 24 | 29 | 71 |
| 25 | 29 | 71 |
| 26 | 29 | 71 |
| 27 | 29 | 71 |
| 28 | 29 | 71 |
| 29 | 29 | 71 |
| 30 | 29 | 71 |
Chance of precipitation in April
Bỉm Sơn gets around 64 mm of rain over 8.6 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 29% and peaks near 37% 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 (%) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 30 | 30 | 31 | 31 | 32 | 33 | 33 | 34 | 35 | 35 | 36 | 37 |
| Rain chance (%) | |
|---|---|
| 1 | 25 |
| 2 | 25 |
| 3 | 25 |
| 4 | 25 |
| 5 | 25 |
| 6 | 25 |
| 7 | 25 |
| 8 | 25 |
| 9 | 25 |
| 10 | 25 |
| 11 | 25 |
| 12 | 26 |
| 13 | 26 |
| 14 | 27 |
| 15 | 27 |
| 16 | 28 |
| 17 | 28 |
| 18 | 29 |
| 19 | 30 |
| 20 | 30 |
| 21 | 31 |
| 22 | 31 |
| 23 | 32 |
| 24 | 33 |
| 25 | 33 |
| 26 | 34 |
| 27 | 35 |
| 28 | 35 |
| 29 | 36 |
| 30 | 37 |
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 86% 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 | 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 | 0 |
| Comfortable (%) | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 |
| Muggy (%) | 29 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 18 | 17 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 11 |
| Oppressive (%) | 41 | 42 | 42 | 43 | 43 | 44 | 44 | 44 | 43 | 43 | 43 | 42 | 42 | 42 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 39 | 38 | 37 | 37 | 36 | 35 | 34 |
| Miserable (%) | 6 | 7 | 8 | 9 | 10 | 12 | 13 | 15 | 16 | 18 | 20 | 21 | 23 | 25 | 27 | 29 | 31 | 32 | 34 | 35 | 36 | 38 | 39 | 41 | 42 | 44 | 45 | 47 | 49 | 50 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 4 | 7 | 13 | 29 | 41 | 6 |
| 2 | 4 | 6 | 13 | 29 | 42 | 7 |
| 3 | 3 | 6 | 13 | 28 | 42 | 8 |
| 4 | 3 | 6 | 12 | 27 | 43 | 9 |
| 5 | 2 | 6 | 12 | 26 | 43 | 10 |
| 6 | 2 | 5 | 12 | 25 | 44 | 12 |
| 7 | 2 | 5 | 12 | 24 | 44 | 13 |
| 8 | 2 | 5 | 12 | 23 | 44 | 15 |
| 9 | 1 | 5 | 12 | 22 | 43 | 16 |
| 10 | 1 | 5 | 12 | 21 | 43 | 18 |
| 11 | 1 | 5 | 12 | 20 | 43 | 20 |
| 12 | 1 | 5 | 11 | 19 | 42 | 21 |
| 13 | 1 | 4 | 11 | 18 | 42 | 23 |
| 14 | 1 | 4 | 11 | 18 | 42 | 25 |
| 15 | 0 | 4 | 10 | 17 | 41 | 27 |
| 16 | 0 | 4 | 10 | 16 | 41 | 29 |
| 17 | 0 | 3 | 9 | 16 | 40 | 31 |
| 18 | 0 | 3 | 9 | 16 | 40 | 32 |
| 19 | 0 | 3 | 9 | 15 | 40 | 34 |
| 20 | 0 | 2 | 8 | 15 | 39 | 35 |
| 21 | 0 | 2 | 7 | 15 | 39 | 36 |
| 22 | 0 | 2 | 7 | 14 | 39 | 38 |
| 23 | 0 | 2 | 6 | 14 | 39 | 39 |
| 24 | 0 | 1 | 6 | 14 | 39 | 41 |
| 25 | 0 | 1 | 5 | 13 | 38 | 42 |
| 26 | 0 | 1 | 5 | 13 | 37 | 44 |
| 27 | 0 | 1 | 5 | 12 | 37 | 45 |
| 28 | 0 | 1 | 4 | 12 | 36 | 47 |
| 29 | 0 | 1 | 4 | 12 | 35 | 49 |
| 30 | 0 | 1 | 4 | 11 | 34 | 50 |
Wind in April
Winds average 9 km/h in April.
Across April, daily wind ranges from about 9 km/h on the calmest days to 9 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) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
Sunrise & sunset in April
Daylight runs from about 12 h 12 min at the start of April to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 30 minutes over April. Sunrise moves from 5:56 AM to 5:33 AM, and sunset from 6:06 PM to 6:15 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 | 12.2 | 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 | 12.5 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.7 |
| Sunrise (AM) | 5:56 | 5:55 | 5:54 | 5:53 | 5:52 | 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 | 5:38 | 5:37 | 5:36 | 5:35 | 5:35 | 5:34 | 5:33 | 5:33 |
| Sunset (PM) | 6:06 | 6:07 | 6:07 | 6:07 | 6:07 | 6:08 | 6:08 | 6:08 | 6:09 | 6:09 | 6:09 | 6:09 | 6:10 | 6:10 | 6:10 | 6:11 | 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 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.2 | 5:56 | 6:06 |
| 2 | 12.2 | 5:55 | 6:07 |
| 3 | 12.2 | 5:54 | 6:07 |
| 4 | 12.2 | 5:53 | 6:07 |
| 5 | 12.2 | 5:52 | 6:07 |
| 6 | 12.3 | 5:52 | 6:08 |
| 7 | 12.3 | 5:51 | 6:08 |
| 8 | 12.3 | 5:50 | 6:08 |
| 9 | 12.3 | 5:49 | 6:09 |
| 10 | 12.3 | 5:48 | 6:09 |
| 11 | 12.4 | 5:47 | 6:09 |
| 12 | 12.4 | 5:46 | 6:09 |
| 13 | 12.4 | 5:46 | 6:10 |
| 14 | 12.4 | 5:45 | 6:10 |
| 15 | 12.4 | 5:44 | 6:10 |
| 16 | 12.5 | 5:43 | 6:11 |
| 17 | 12.5 | 5:42 | 6:11 |
| 18 | 12.5 | 5:41 | 6:11 |
| 19 | 12.5 | 5:41 | 6:11 |
| 20 | 12.5 | 5:40 | 6:12 |
| 21 | 12.5 | 5:39 | 6:12 |
| 22 | 12.6 | 5:38 | 6:12 |
| 23 | 12.6 | 5:38 | 6:13 |
| 24 | 12.6 | 5:37 | 6:13 |
| 25 | 12.6 | 5:36 | 6:13 |
| 26 | 12.6 | 5:35 | 6:14 |
| 27 | 12.7 | 5:35 | 6:14 |
| 28 | 12.7 | 5:34 | 6:14 |
| 29 | 12.7 | 5:33 | 6:15 |
| 30 | 12.7 | 5:33 | 6:15 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 4.55 kWh/m².
For context, solar energy here swings from a low near 2.43 kWh/m² to a high of 5.33 kWh/m² in June across the year — April's 4.55 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) | 3.8 | 3.9 | 3.9 | 4.0 | 4.0 | 4.1 | 4.1 | 4.2 | 4.3 | 4.3 | 4.4 | 4.4 | 4.5 | 4.5 | 4.6 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 |
| Level | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.8 | Moderate |
| 2 | 3.9 | Moderate |
| 3 | 3.9 | Moderate |
| 4 | 4.0 | Moderate |
| 5 | 4.0 | Bright |
| 6 | 4.1 | Bright |
| 7 | 4.1 | Bright |
| 8 | 4.2 | Bright |
| 9 | 4.3 | Bright |
| 10 | 4.3 | Bright |
| 11 | 4.4 | Bright |
| 12 | 4.4 | Bright |
| 13 | 4.5 | Bright |
| 14 | 4.5 | Bright |
| 15 | 4.6 | Bright |
| 16 | 4.7 | Bright |
| 17 | 4.7 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.8 | Bright |
| 20 | 4.8 | Bright |
| 21 | 4.8 | Bright |
| 22 | 4.9 | Bright |
| 23 | 4.9 | Bright |
| 24 | 4.9 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 5.0 | Bright |
| 30 | 5.1 | Bright |
Hazard calendar for Bỉm Sơn
In April, Bỉm Sơn sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Bỉm Sơn sits in the Pacific typhoon belt; the season peaks July–October.
Bỉm Sơn's monsoon runs May–October, when most of the year's rain falls.
Is April a good time to visit Bỉm Sơn?
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 Bỉm Sơn for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Bỉm Sơn in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Bỉm Sơn sees daytime highs around 29°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.
Sea temperature near Bỉm Sơn in April
The nearest coast averages about 24°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 36 km away) is warmest in August at about 30°C and coldest in February near 20°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 21 | 20 | 21 | 24 | 28 | 29 | 30 | 30 | 29 | 28 | 26 | 23 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 20 | Refreshing |
| Mar | 21 | Refreshing |
| Apr | 24 | Refreshing |
| May | 28 | Warm |
| Jun | 29 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Warm |
| Nov | 26 | Warm |
| Dec | 23 | Refreshing |
UV index in Bỉm Sơn in April
Clear-sky midday UV in April peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Bỉm Sơn peaks around July 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 6 (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) | 7 | 9 | 10 | 8 | 10 | 12 | 12 | 11 | 9 | 9 | 7 | 6 |
| Level | Very high | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | Very high |
| Feb | 9 | Very high |
| Mar | 10 | Very high |
| Apr | 8 | Very high |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 9 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Bỉm Sơn 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 Bỉm Sơn is worst in December — around 134 µg/m³ PM2.5 (unhealthy), about 3.8× the cleanest month (July, 35 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) | 126 | 106 | 94 | 87 | 60 | 42 | 35 | 46 | 69 | 93 | 116 | 134 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Moderate | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 126 | Unhealthy |
| Feb | 106 | Unhealthy |
| Mar | 94 | Unhealthy |
| Apr | 87 | Unhealthy |
| May | 60 | Unhealthy |
| Jun | 42 | Poor |
| Jul | 35 | Moderate |
| Aug | 46 | Poor |
| Sep | 69 | Unhealthy |
| Oct | 93 | Unhealthy |
| Nov | 116 | Unhealthy |
| Dec | 134 | Unhealthy |
Where is Bỉm Sơn?
Bỉm Sơn sits at 20.1°N, 105.9°E, 7 m above sea level, in Vietnam. The nearest listed city is Nga Sơn, 14 km away.
Topography around Bỉm Sơn
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bỉm Sơn.
Within 3 km, the terrain around Bỉm Sơn has only modest variations in elevation — a maximum elevation change of 99 m around an average of 13 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 327 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,500 m.
The land around Bỉm Sơn is covered by trees (39%) and cropland (27%) within 3 km, trees (52%) and cropland (33%) within 16 km, and trees (41%), cropland (29%) and water (23%) 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 Bỉm Sơn (20.0781°, 105.8603°, elevation 7 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). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).