Long Diền weather in January
In January, Long Diền sees average daytime highs of 29°C and overnight lows near 24°C, with 22 mm of rain across 2.8 wet days and about 11.5 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.
Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 31% of the time in January, and the air most often feels oppressive.
Daylight stretches from about 11 h 24 min at the start of January to 11 h 30 min by month's end. Set against the rest of the year, January is Long Diền's 4th-clearest and 3rd-windiest month. For the whole year in context, see Long Diền's year-round climate.
- Daytime high
- 29°
- 11th warmest
- Overnight low
- 24°
- 1st coldest
- Rainfall
- 22 mm
- 2.8 wet days
- Daylight
- 11 h 24 min
- 6:17 AM – 5:44 PM
- Cloud cover
- 58%
- 4th clearest
- Wind
- 13 km/h
- 3rd windiest
- Solar energy
- 5.35 kWh/m²
- Travel score
- 6.2
- out of 10
Temperature in January
Day-to-day highs hold fairly steady near 29°C through the month.
A typical January day in Long Diền reaches about 29°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, January runs on par with December and on par with February.
| 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) | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 29 | 24 |
| 2 | 29 | 24 |
| 3 | 29 | 24 |
| 4 | 29 | 24 |
| 5 | 29 | 24 |
| 6 | 29 | 24 |
| 7 | 29 | 24 |
| 8 | 29 | 24 |
| 9 | 29 | 24 |
| 10 | 29 | 24 |
| 11 | 29 | 24 |
| 12 | 29 | 24 |
| 13 | 29 | 24 |
| 14 | 29 | 24 |
| 15 | 29 | 24 |
| 16 | 29 | 24 |
| 17 | 29 | 24 |
| 18 | 29 | 24 |
| 19 | 29 | 24 |
| 20 | 29 | 23 |
| 21 | 29 | 23 |
| 22 | 29 | 23 |
| 23 | 29 | 23 |
| 24 | 29 | 23 |
| 25 | 29 | 23 |
| 26 | 29 | 23 |
| 27 | 29 | 23 |
| 28 | 29 | 23 |
| 29 | 29 | 23 |
| 30 | 29 | 23 |
| 31 | 29 | 23 |
How January really feels in Long Diền
Once humidity and wind are folded in, January 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.
January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Long Diền weather by month
How January compares with the rest of the year at a glance. January is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 24° | 22 | 2.8 | 11.5 | 6.2 |
| Feb | 30° / 24° | 7 | 0.9 | 11.7 | 6.2 |
| Mar | 31° / 25° | 15 | 2.7 | 11.9 | 5.4 |
| Apr | 32° / 27° | 49 | 8.9 | 12.2 | 4.2 |
| May | 32° / 27° | 188 | 24 | 12.5 | 2.8 |
| Jun | 31° / 26° | 251 | 27.4 | 12.6 | 2.6 |
| Jul | 30° / 26° | 253 | 28.8 | 12.6 | 2.7 |
| Aug | 30° / 26° | 256 | 28.7 | 12.3 | 2.7 |
| Sep | 30° / 25° | 289 | 28.1 | 12.1 | 2.7 |
| Oct | 30° / 25° | 254 | 26.4 | 11.8 | 3.1 |
| Nov | 30° / 25° | 126 | 14.9 | 11.5 | 4.4 |
| Dec | 29° / 24° | 66 | 9 | 11.4 | 5.3 |
Cloud cover in January
The sky is clear or mostly clear about 31% of the time in January.
Beyond those clear spells, partly cloudy skies cover about 20% of January, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to open up as the month goes on.
| 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 (%) | 41 | 42 | 43 | 44 | 46 | 47 | 48 | 48 | 48 | 49 | 50 | 50 | 51 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 54 | 54 | 55 | 55 | 56 | 56 | 57 | 57 | 58 | 58 | 59 |
| Cloudier (%) | 59 | 58 | 57 | 56 | 54 | 53 | 52 | 52 | 52 | 51 | 50 | 50 | 49 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 46 | 46 | 45 | 45 | 44 | 44 | 43 | 43 | 42 | 42 | 41 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 41 | 59 |
| 2 | 42 | 58 |
| 3 | 43 | 57 |
| 4 | 44 | 56 |
| 5 | 46 | 54 |
| 6 | 47 | 53 |
| 7 | 48 | 52 |
| 8 | 48 | 52 |
| 9 | 48 | 52 |
| 10 | 49 | 51 |
| 11 | 50 | 50 |
| 12 | 50 | 50 |
| 13 | 51 | 49 |
| 14 | 51 | 49 |
| 15 | 51 | 49 |
| 16 | 52 | 48 |
| 17 | 52 | 48 |
| 18 | 52 | 48 |
| 19 | 53 | 47 |
| 20 | 53 | 47 |
| 21 | 54 | 46 |
| 22 | 54 | 46 |
| 23 | 55 | 45 |
| 24 | 55 | 45 |
| 25 | 56 | 44 |
| 26 | 56 | 44 |
| 27 | 57 | 43 |
| 28 | 57 | 43 |
| 29 | 58 | 42 |
| 30 | 58 | 42 |
| 31 | 59 | 41 |
Chance of precipitation in January
Long Diền gets around 22 mm of rain over 2.8 wet days in January. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 9% and peaks near 16% on the wettest days. The odds ease 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 16 | 15 | 14 | 14 | 13 | 12 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 5 |
| Rain chance (%) | |
|---|---|
| 1 | 16 |
| 2 | 15 |
| 3 | 14 |
| 4 | 14 |
| 5 | 13 |
| 6 | 12 |
| 7 | 11 |
| 8 | 11 |
| 9 | 10 |
| 10 | 10 |
| 11 | 10 |
| 12 | 9 |
| 13 | 9 |
| 14 | 9 |
| 15 | 9 |
| 16 | 9 |
| 17 | 9 |
| 18 | 9 |
| 19 | 9 |
| 20 | 9 |
| 21 | 8 |
| 22 | 8 |
| 23 | 8 |
| 24 | 8 |
| 25 | 7 |
| 26 | 7 |
| 27 | 6 |
| 28 | 6 |
| 29 | 5 |
| 30 | 5 |
| 31 | 5 |
Humidity in January
Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the oppressive band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 96% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 |
| Muggy (%) | 35 | 36 | 36 | 37 | 38 | 38 | 39 | 40 | 40 | 40 | 41 | 41 | 42 | 42 | 43 | 43 | 44 | 45 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 52 | 53 | 54 | 53 | 54 |
| Oppressive (%) | 60 | 59 | 60 | 59 | 58 | 58 | 57 | 57 | 56 | 56 | 55 | 55 | 54 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 39 | 38 |
| Miserable (%) | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 2 | 35 | 60 | 3 |
| 2 | 2 | 36 | 59 | 3 |
| 3 | 2 | 36 | 60 | 2 |
| 4 | 2 | 37 | 59 | 2 |
| 5 | 2 | 38 | 58 | 2 |
| 6 | 2 | 38 | 58 | 2 |
| 7 | 2 | 39 | 57 | 2 |
| 8 | 2 | 40 | 57 | 1 |
| 9 | 3 | 40 | 56 | 1 |
| 10 | 3 | 40 | 56 | 1 |
| 11 | 3 | 41 | 55 | 1 |
| 12 | 3 | 41 | 55 | 1 |
| 13 | 3 | 42 | 54 | 1 |
| 14 | 3 | 42 | 54 | 1 |
| 15 | 3 | 43 | 53 | 1 |
| 16 | 4 | 43 | 52 | 1 |
| 17 | 4 | 44 | 51 | 1 |
| 18 | 4 | 45 | 50 | 1 |
| 19 | 4 | 45 | 49 | 1 |
| 20 | 4 | 46 | 48 | 1 |
| 21 | 4 | 47 | 47 | 1 |
| 22 | 5 | 48 | 46 | 1 |
| 23 | 5 | 49 | 45 | 1 |
| 24 | 5 | 50 | 44 | 1 |
| 25 | 5 | 51 | 43 | 1 |
| 26 | 5 | 52 | 42 | 1 |
| 27 | 6 | 52 | 41 | 1 |
| 28 | 6 | 53 | 40 | 1 |
| 29 | 6 | 54 | 39 | 1 |
| 30 | 7 | 53 | 39 | 1 |
| 31 | 7 | 54 | 38 | 1 |
Wind in January
Winds average 13 km/h in January.
Across January, daily wind ranges from about 12 km/h on the calmest days to 14 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) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Feels | calm | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | light breeze |
| 5 | 12 | light breeze |
| 6 | 12 | light breeze |
| 7 | 12 | light breeze |
| 8 | 12 | light breeze |
| 9 | 12 | light breeze |
| 10 | 13 | light breeze |
| 11 | 13 | light breeze |
| 12 | 13 | light breeze |
| 13 | 13 | light breeze |
| 14 | 13 | light breeze |
| 15 | 13 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 14 | light breeze |
| 22 | 14 | light breeze |
| 23 | 14 | light breeze |
| 24 | 14 | light breeze |
| 25 | 14 | light breeze |
| 26 | 14 | light breeze |
| 27 | 14 | light breeze |
| 28 | 14 | light breeze |
| 29 | 14 | light breeze |
| 30 | 14 | light breeze |
| 31 | 14 | light breeze |
Sunrise & sunset in January
Daylight runs from about 11 h 24 min at the start of January to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over January. Sunrise moves from 6:12 AM to 6:18 AM, and sunset from 5:36 PM to 5:51 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) | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 |
| Sunrise (AM) | 6:12 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 | 6:15 | 6:15 | 6:15 | 6:15 | 6:16 | 6:16 | 6:16 | 6:17 | 6:17 | 6:17 | 6:17 | 6:17 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 |
| Sunset (PM) | 5:36 | 5:37 | 5:37 | 5:38 | 5:38 | 5:39 | 5:39 | 5:40 | 5:40 | 5:41 | 5:41 | 5:42 | 5:42 | 5:43 | 5:43 | 5:44 | 5:44 | 5:45 | 5:45 | 5:46 | 5:46 | 5:47 | 5:47 | 5:48 | 5:48 | 5:49 | 5:49 | 5:49 | 5:50 | 5:50 | 5:51 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.4 | 6:12 | 5:36 |
| 2 | 11.4 | 6:13 | 5:37 |
| 3 | 11.4 | 6:13 | 5:37 |
| 4 | 11.4 | 6:14 | 5:38 |
| 5 | 11.4 | 6:14 | 5:38 |
| 6 | 11.4 | 6:14 | 5:39 |
| 7 | 11.4 | 6:15 | 5:39 |
| 8 | 11.4 | 6:15 | 5:40 |
| 9 | 11.4 | 6:15 | 5:40 |
| 10 | 11.4 | 6:15 | 5:41 |
| 11 | 11.4 | 6:16 | 5:41 |
| 12 | 11.4 | 6:16 | 5:42 |
| 13 | 11.4 | 6:16 | 5:42 |
| 14 | 11.4 | 6:17 | 5:43 |
| 15 | 11.4 | 6:17 | 5:43 |
| 16 | 11.4 | 6:17 | 5:44 |
| 17 | 11.5 | 6:17 | 5:44 |
| 18 | 11.5 | 6:17 | 5:45 |
| 19 | 11.5 | 6:18 | 5:45 |
| 20 | 11.5 | 6:18 | 5:46 |
| 21 | 11.5 | 6:18 | 5:46 |
| 22 | 11.5 | 6:18 | 5:47 |
| 23 | 11.5 | 6:18 | 5:47 |
| 24 | 11.5 | 6:18 | 5:48 |
| 25 | 11.5 | 6:18 | 5:48 |
| 26 | 11.5 | 6:18 | 5:49 |
| 27 | 11.5 | 6:18 | 5:49 |
| 28 | 11.5 | 6:18 | 5:49 |
| 29 | 11.5 | 6:18 | 5:50 |
| 30 | 11.5 | 6:18 | 5:50 |
| 31 | 11.5 | 6:18 | 5:51 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 5.35 kWh/m².
For context, solar energy here swings from a low near 4.67 kWh/m² to a high of 6.52 kWh/m² in March across the year — January's 5.35 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.7 | 5.7 | 5.7 |
| Level | 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 | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.0 | Bright |
| 2 | 5.0 | Bright |
| 3 | 5.0 | Bright |
| 4 | 5.0 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.2 | Bright |
| 9 | 5.2 | Bright |
| 10 | 5.2 | Bright |
| 11 | 5.2 | Bright |
| 12 | 5.3 | Bright |
| 13 | 5.3 | Bright |
| 14 | 5.3 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.3 | Bright |
| 17 | 5.4 | Bright |
| 18 | 5.4 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.4 | Bright |
| 21 | 5.5 | Bright |
| 22 | 5.5 | Bright |
| 23 | 5.5 | Bright |
| 24 | 5.5 | Bright |
| 25 | 5.6 | Bright |
| 26 | 5.6 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.7 | Bright |
| 30 | 5.7 | Bright |
| 31 | 5.7 | Bright |
Hazard calendar for Long Diền
In January, Long Diền sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Long Diền sits in the Pacific typhoon belt; the season peaks July–October.
Long Diền's rainy season runs May–October, when most of the year's rain falls.
Is January a good time to visit Long Diền?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is a reasonable time to visit Long Diền for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Long Diền in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Long Diền sees daytime highs around 29°C and nights near 24°C. Pack light clothes. Worth having: sun protection.
Sea temperature near Long Diền in January
The nearest coast averages about 26°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in May at about 30°C and coldest in January near 26°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) | 26 | 26 | 27 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 27 | Warm |
| Apr | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Long Diền in January
Clear-sky midday UV in January peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Long Diền peaks around March 23 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 at about 9 (very 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) | 11 | 12 | 13 | 13 | 13 | 11 | 12 | 13 | 13 | 10 | 9 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 10 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Long Diền in January
Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.
Air quality in Long Diền is worst in October — around 34 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (March, 21 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) | 26 | 21 | 21 | 21 | 25 | 30 | 29 | 29 | 33 | 34 | 31 | 34 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 26 | Moderate |
| Feb | 21 | Moderate |
| Mar | 21 | Moderate |
| Apr | 21 | Moderate |
| May | 25 | Moderate |
| Jun | 30 | Moderate |
| Jul | 29 | Moderate |
| Aug | 29 | Moderate |
| Sep | 33 | Moderate |
| Oct | 34 | Moderate |
| Nov | 31 | Moderate |
| Dec | 34 | Moderate |
Where is Long Diền?
Long Diền sits at 10.5°N, 107.2°E, 17 m above sea level, in Vietnam. The nearest listed city is Thành Phố Bà Rịa, 5.0 km away.
Topography around Long Diền
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Long Diền.
Within 3 km, the terrain around Long Diền has only modest variations in elevation — a maximum elevation change of 66 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 515 m; within 80 km, large variations in elevation — a maximum elevation change of 918 m.
The land around Long Diền is covered by cropland (34%) and artificial surfaces (25%) within 3 km, water (29%) and trees (28%) within 16 km, and water (40%) and trees (33%) 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 Long Diền (10.4833°, 107.2167°, elevation 17 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).