Phong Thạnh weather in December

In December, Phong Thạnh sees average daytime highs of 30°C and overnight lows near 24°C, with 101 mm of rain across 12.7 wet days and about 11.5 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 11% 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 Phong Thạnh's 5th-clearest and 5th-windiest month. For the whole year in context, see Phong Thạnh's year-round climate.

Daytime high
30°
12th warmest
Overnight low
24°
2nd coldest
Rainfall
101 mm
12.7 wet days
Daylight
11 h 30 min
6:11 AM – 5:39 PM
Cloud cover
76%
5th clearest
Wind
10 km/h
5th windiest
Solar energy
4.47 kWh/m²
Travel score
4.5
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Phong Thạnh reaches about 30°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, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Phong Thạnh

Once humidity and wind are folded in, December averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Phong Thạnh weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°33611.55.1
Feb32° / 24°193.411.74.8
Mar33° / 25°598.811.93.7
Apr33° / 26°11916.612.22.8
May33° / 26°25726.912.42.2
Jun31° / 25°28828.412.52.3
Jul31° / 25°30029.612.52.4
Aug31° / 25°28629.412.32.4
Sep31° / 25°33728.912.12.4
Oct31° / 25°4062911.82.6
Nov30° / 24°20922.211.63.3
Dec30° / 24°10112.711.54.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% 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 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22773
32773
42773
52773
62773
72674
82773
92773
102773
112674
122674
132575
142674
152674
162476
172476
182476
192476
202377
212377
222377
232377
242377
252476
262575
272674
282674
292773
302971
312971

Chance of precipitation in December

Any precipitation

Phong Thạnh gets around 101 mm of rain over 12.7 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 41% and peaks near 60% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
160
259
357
456
554
653
752
850
949
1047
1146
1244
1343
1441
1540
1639
1738
1837
1936
2035
2134
2234
2333
2432
2531
2631
2730
2830
2929
3029
3128

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 65% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101106029
201106227
301106326
401116325
501116523
601116622
701126621
801126720
901136719
1001136917
1101146916
1201156915
1301166914
1401176813
1512196612
1612206611
1712216511
1812226510
191223659
201224649
211225648
221226647
231227637
241228636
251228636
261229635
271229635
281129654
291129654
301129654
311129654

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2711calm
2811calm
2911calm
3011calm
3111calm

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 6:04 AM to 6:18 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)
111.56:045:33
211.56:045:33
311.56:055:34
411.56:055:34
511.56:055:34
611.56:065:35
711.56:065:35
811.56:075:35
911.56:075:36
1011.56:085:36
1111.56:095:37
1211.56:095:37
1311.56:105:37
1411.56:105:38
1511.56:115:38
1611.56:115:39
1711.56:115:39
1811.56:125:39
1911.56:125:40
2011.56:135:40
2111.56:135:41
2211.56:145:41
2311.56:145:42
2411.56:155:42
2511.56:155:43
2611.56:165:43
2711.56:165:44
2811.56:175:44
2911.56:175:45
3011.56:175:45
3111.56:185:46

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.47 kWh/m².

For context, solar energy here swings from a low near 4.27 kWh/m² to a high of 6.06 kWh/m² in March across the year — December's 4.47 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.6Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in December

Hazard calendar for Phong Thạnh

In seasonPeak

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

Phong Thạnh sits in the Pacific typhoon belt; the season peaks July–October.

Phong Thạnh'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 Phong Thạnh?

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

4.5
Sightseeing
3rd-best month of the year
6.2
Beach & pool
4th-best month of the year

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

What to pack for Phong Thạnh in December

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

In December, Phong Thạnh sees daytime highs around 30°C and nights near 24°C. Pack light clothes. Worth having: rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Phong Thạnh 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 38 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 Phong Thạnh 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 Phong Thạnh 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 Phong Thạnh 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 Phong Thạnh is worst in December — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (May, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateDec 1922 µg/m³May 2012 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb17Moderate
Mar15Moderate
Apr14Moderate
May12Good
Jun13Moderate
Jul15Moderate
Aug13Moderate
Sep14Moderate
Oct15Moderate
Nov18Moderate
Dec22Moderate
Location & terrain

Where is Phong Thạnh?

Phong Thạnh sits at 9.3°N, 105.3°E, 1 m above sea level, in Vietnam. The nearest listed city is Ấp Hô Phòng, 13 km away.

Topography around Phong Thạnh

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

Within 3 km, the terrain around Phong Thạnh has only modest variations in elevation — a maximum elevation change of 6 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 10 m; within 80 km, only modest variations in elevation — a maximum elevation change of 22 m.

The land around Phong Thạnh is covered by cropland (38%) and water (38%) within 3 km, cropland (50%) and water (33%) within 16 km, and water (46%) and cropland (35%) within 80 km.

3 km
6 m
16 km
10 m
80 km
22 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
December weather nearby: Ấp Hô Phòng 13 km · Giá Rai 16 km · Cà Mau 27 km · Thới Bình 27 km · An Trạch 29 km · Gành Hào 34 km · Ngã Năm 39 km · Bạc Liêu 42 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 Phong Thạnh (9.3236°, 105.3464°, 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).