Kiên Hải weather in December

In December, Kiên Hải sees average daytime highs of 28°C and overnight lows near 25°C, with 54 mm of rain across 8.7 wet days and about 11.4 hours of daylight. It is the 8th-warmest and 9th-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 21% 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 24 min by month's end. Set against the rest of the year, December is Kiên Hải's 5th-clearest and 6th-windiest month. For the whole year in context, see Kiên Hải's year-round climate.

Daytime high
28°
8th warmest
Overnight low
25°
2nd coldest
Rainfall
54 mm
8.7 wet days
Daylight
11 h 24 min
6:14 AM – 5:39 PM
Cloud cover
67%
5th clearest
Wind
14 km/h
6th windiest
Solar energy
4.71 kWh/m²
Travel score
6.0
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 Kiên Hải reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°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)
12926
22925
32925
42925
52925
62925
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242825
252825
262825
272825
282825
292825
302825
312825

How December really feels in Kiên Hải

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.

Kiên Hải weather by month

How December compares with the rest of the year at a glance. December is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°214.711.56.8
Feb29° / 25°13311.76.6
Mar30° / 26°387.211.95.7
Apr30° / 27°9215.612.24.4
May29° / 27°26726.512.53.2
Jun29° / 27°34626.812.63.2
Jul28° / 27°3732812.53.3
Aug28° / 26°35027.712.33.4
Sep28° / 26°38026.912.13.5
Oct28° / 26°31627.511.83.5
Nov29° / 26°11916.811.54.6
Dec28° / 25°548.711.46.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23565
33664
43763
53763
63763
73763
83763
93763
103862
113862
123862
133961
143961
153961
163961
173961
184060
193961
203862
213862
223862
233961
243862
254060
264060
273961
284159
294159
304258
314258

Chance of precipitation in December

Any precipitation

Kiên Hải gets around 54 mm of rain over 8.7 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 28% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
238
337
436
535
634
734
833
932
1032
1131
1230
1329
1428
1528
1627
1727
1826
1926
2025
2125
2224
2324
2423
2522
2622
2721
2821
2920
3020
3119

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101156915
201166914
302166913
402167012
502177011
602177110
702177110
80218719
90218728
100219727
110220717
120221716
130322696
140322705
150323695
161324675
171325674
181426654
191426654
201427644
211528624
221528624
231528624
241528624
251628614
261628614
271627624
281627624
291626643
301625653
311525663

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 30 min at the start of December to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:07 AM to 6:21 AM, and sunset from 5:34 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:075:34
211.56:075:34
311.56:085:35
411.46:085:35
511.46:095:35
611.46:095:36
711.46:105:36
811.46:105:36
911.46:115:37
1011.46:115:37
1111.46:125:37
1211.46:125:38
1311.46:135:38
1411.46:135:39
1511.46:145:39
1611.46:145:39
1711.46:155:40
1811.46:155:40
1911.46:165:41
2011.46:165:41
2111.46:175:42
2211.46:175:42
2311.46:185:43
2411.46:185:43
2511.46:185:44
2611.46:195:44
2711.46:195:45
2811.46:205:45
2911.46:205:46
3011.46:215:46
3111.46:215:47

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.71 kWh/m².

For context, solar energy here swings from a low near 4.43 kWh/m² to a high of 6.07 kWh/m² in April across the year — December's 4.71 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for Kiên Hải

In seasonPeak

In December, Kiên Hải sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Kiên Hải sits in the Pacific typhoon belt; the season peaks July–October.

Kiên Hải's monsoon runs May–October, when most of the year's rain falls.

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

Is December a good time to visit Kiên Hải?

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

6.0
Sightseeing
3rd-best month of the year
6.9
Beach & pool
4th-best month of the year

December is a reasonable time to visit Kiên Hải for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Kiên Hải in December

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

In December, Kiên Hải sees daytime highs around 28°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Kiên Hải in December

The nearest coast averages about 28°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 31°C and coldest in January near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Kiên Hải in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kiên Hải peaks around August 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 20UV 13Dec 14UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct10Very high
Nov9Very high
Dec9Very high

Air quality in Kiên Hải 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 Kiên Hải is worst in January — around 45 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (August, 19 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 145 µg/m³Aug 1519 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb37Poor
Mar33Moderate
Apr32Moderate
May27Moderate
Jun22Moderate
Jul22Moderate
Aug19Moderate
Sep23Moderate
Oct32Moderate
Nov42Poor
Dec45Poor
Location & terrain

Where is Kiên Hải?

Kiên Hải sits at 10.0°N, 104.8°E, 18 m above sea level, in Vietnam. The nearest listed city is Rạch Giá, 26 km away.

Topography around Kiên Hải

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kiên Hải.

Within 3 km, the terrain around Kiên Hải has significant variations in elevation — a maximum elevation change of 400 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 400 m; within 80 km, large variations in elevation — a maximum elevation change of 691 m.

The land around Kiên Hải is covered by water (85%) within 3 km, water (98%) within 16 km, and water (48%) and cropland (41%) within 80 km.

3 km
400 m
16 km
400 m
80 km
691 m
treesgrasslandcroplandartificial surfaceswatermangroves
December weather nearby: Rạch Giá 26 km · Xóm Cái Nước 34 km · Óc Eo 45 km · Cô Tô 46 km · Núi Sập 56 km · Hà Tiên 60 km · Cờ Đỏ 65 km · Vĩnh Thạnh 66 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 Kiên Hải (9.9727°, 104.8475°, elevation 18 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).