An Trạch in Winter
In winter (December, January and February), An Trạch sees average daytime highs around 27°C and overnight lows near 25°C, with 146 mm of rain over about 18 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 27°C. The sky is clear or mostly clear about 26% of the time across winter, and the air most often feels oppressive.
Winter is An Trạch's best season of the year to visit on our travel score. An Trạch has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see An Trạch's year-round climate.
- Avg daytime high
- 27°C
- coldest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 146 mm
- 18 wet days
- Avg wind
- 20 km/h
- Travel score
- 6.9
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in An Trạch in Winter
Across winter, daytime highs hold fairly steady around 27°C.
A typical winter day in An Trạch reaches about 27°C and drops to 25°C overnight. The warmest of the three months is December, the coolest January.
How winter really feels in An Trạch
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
An Trạch weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 25° | 26 | 4.1 | 11.5 | 7.2 |
| Feb | 27° / 25° | 11 | 1.7 | 11.7 | 7.7 |
| Mar | 28° / 26° | 38 | 6.3 | 11.9 | 6.5 |
| Apr | 30° / 27° | 84 | 13.2 | 12.2 | 4.9 |
| May | 30° / 27° | 203 | 25.9 | 12.4 | 3.1 |
| Jun | 30° / 27° | 242 | 27.4 | 12.5 | 2.9 |
| Jul | 29° / 26° | 250 | 29.3 | 12.5 | 3.0 |
| Aug | 29° / 26° | 234 | 28.9 | 12.3 | 3.0 |
| Sep | 29° / 26° | 270 | 28.1 | 12.1 | 3.0 |
| Oct | 28° / 26° | 323 | 28.7 | 11.8 | 3.2 |
| Nov | 28° / 26° | 210 | 21.3 | 11.6 | 4.2 |
| Dec | 28° / 25° | 108 | 12.2 | 11.5 | 5.9 |
Cloud cover in Winter
The sky is clear or mostly clear about 26% of the time across winter.
Chance of precipitation in Winter
An Trạch gets around 146 mm of rain over 18 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 20 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 30 min in early December to 11 h 48 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.2 kWh/m².
Hazard calendar for An Trạch
In winter, An Trạch overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
An Trạch sits in the Pacific typhoon belt; the season peaks July–October.
An Trạch's rainy season runs May–November, when most of the year's rain falls.
Is winter a good time to visit An Trạch?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit An Trạch for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for An Trạch in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, An Trạch sees daytime highs around 27°C and nights near 25°C. Pack light clothes. Worth having: rain gear, sun protection and a windbreaker. About 18 days see rain.
Sea temperature near An Trạch in Winter
The nearest coast averages about 26°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 22 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 | 28 | 29 | 30 | 30 | 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 | 28 | Warm |
| Apr | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in An Trạch in Winter
Clear-sky midday UV across winter averages 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 An Trạch peaks around March 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 10 (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) | 10 | 12 | 13 | 13 | 13 | 12 | 12 | 12 | 13 | 11 | 10 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 10 | Extreme |
| Dec | 10 | Very high |
Air quality in An Trạch in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in An Trạch is worst in December — around 25 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (May, 15 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) | 19 | 16 | 15 | 15 | 15 | 17 | 19 | 17 | 19 | 22 | 21 | 25 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 16 | Moderate |
| Mar | 15 | Moderate |
| Apr | 15 | Moderate |
| May | 15 | Moderate |
| Jun | 17 | Moderate |
| Jul | 19 | Moderate |
| Aug | 17 | Moderate |
| Sep | 19 | Moderate |
| Oct | 22 | Moderate |
| Nov | 21 | Moderate |
| Dec | 25 | Moderate |
Where is An Trạch?
An Trạch sits at 9.1°N, 105.4°E, 1 m above sea level, in Vietnam. The nearest listed city is Gành Hào, 5.0 km away.
Topography around An Trạch
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of An Trạch.
Within 3 km, the terrain around An Trạch has only modest variations in elevation — a maximum elevation change of 10 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 13 m; within 80 km, only modest variations in elevation — a maximum elevation change of 22 m.
The land around An Trạch is covered by water (56%) and trees (20%) within 3 km, water (67%) within 16 km, and water (56%) and cropland (26%) 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 An Trạch (9.0686°, 105.3958°, elevation 1 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.