An Trạch weather in December

In December, An Trạch sees average daytime highs of 28°C and overnight lows near 25°C, with 108 mm of rain across 12.2 wet days and about 11.5 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 30 min at the start of December to 11 h 30 min by month's end. Set against the rest of the year, December is An Trạch's 6th-clearest and 3rd-windiest month. For the whole year in context, see An Trạch's year-round climate.

Daytime high
28°
10th warmest
Overnight low
25°
3rd coldest
Rainfall
108 mm
12.2 wet days
Daylight
11 h 30 min
6:10 AM – 5:39 PM
Cloud cover
73%
6th clearest
Wind
19 km/h
3rd windiest
Solar energy
4.57 kWh/m²
Travel score
5.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical December day in An Trạch reaches about 28°C in the afternoon and slips back to 25°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, December runs on par with November and on par with January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172725
182725
192725
202725
212725
222725
232725
242725
252725
262725
272725
282725
292725
302725
312725

How December really feels in An Trạch

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.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December 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 December compares with the rest of the year at a glance. December is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°264.111.57.2
Feb27° / 25°111.711.77.7
Mar28° / 26°386.311.96.5
Apr30° / 27°8413.212.24.9
May30° / 27°20325.912.43.1
Jun30° / 27°24227.412.52.9
Jul29° / 26°25029.312.53.0
Aug29° / 26°23428.912.33.0
Sep29° / 26°27028.112.13.0
Oct28° / 26°32328.711.83.2
Nov28° / 26°21021.311.64.2
Dec28° / 25°10812.211.55.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33367
43268
53268
63268
73268
83169
93169
103268
113169
123169
133070
142971
152971
162872
172872
182872
192872
202773
212773
222773
232773
242872
252971
262971
273070
283070
293367
303466
313565

Chance of precipitation in December

Any precipitation

An Trạch gets around 108 mm of rain over 12.2 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 39% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
157
256
355
454
553
652
751
850
948
1047
1146
1244
1343
1441
1540
1639
1737
1836
1935
2034
2133
2231
2330
2429
2528
2627
2726
2825
2924
3023
3122

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the oppressive band about 73% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1045739
2045937
3056035
4056233
5056431
6056629
7066727
8066925
9067123
10067321
11077320
12077518
13087517
14197416
15197515
161107514
171107613
181117513
191117612
201127611
211127611
221127710
23113779
24113779
25113788
26114787
27114787
28114796
29114796
30114796
31114796

Wind in December

Winds average 19 km/h in December.

Across December, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 30 min at the start of December to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:03 AM to 6:17 AM, and sunset from 5:33 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:035:33
211.56:035:34
311.56:045:34
411.56:045:34
511.56:055:35
611.56:055:35
711.56:065:35
811.56:065:36
911.56:075:36
1011.56:075:36
1111.56:085:37
1211.56:085:37
1311.56:095:38
1411.56:095:38
1511.56:105:38
1611.56:105:39
1711.56:115:39
1811.56:115:40
1911.56:125:40
2011.56:125:41
2111.56:135:41
2211.56:135:42
2311.56:145:42
2411.56:145:42
2511.56:155:43
2611.56:155:43
2711.56:165:44
2811.56:165:44
2911.56:165:45
3011.56:175:45
3111.56:175:46

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.57 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.31 kWh/m² in April across the year — December's 4.57 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.8Bright
Planning a trip in December

Hazard calendar for An Trạch

In seasonPeak

In December, An Trạch sits inside 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.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit An Trạch?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.9
Sightseeing
4th-best month of the year
6.2
Beach & pool
5th-best month of the year

December 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 December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, An Trạch sees daytime highs around 28°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near An Trạch in December

The nearest coast averages about 27°C in December — 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.

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar28Warm
Apr29Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in An Trạch in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 21UV 13Dec 18UV 10
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep13Extreme
Oct11Extreme
Nov10Extreme
Dec10Very high

Air quality in An Trạch in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateDec 1524 µg/m³May 1115 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb16Moderate
Mar15Moderate
Apr15Moderate
May15Moderate
Jun17Moderate
Jul19Moderate
Aug17Moderate
Sep19Moderate
Oct22Moderate
Nov21Moderate
Dec25Moderate
Location & terrain

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.

3 km
10 m
16 km
13 m
80 km
22 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Gành Hào 5.0 km · Ấp Hô Phòng 18 km · Giá Rai 20 km · Phong Thạnh 29 km · Cà Mau 29 km · Tam Giang 38 km · Bạc Liêu 44 km · Thới Bình 46 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
none 86%Catholic 6%Buddhist 6%Protestant 1%

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. 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).