Óc Eo weather in December

In December, Óc Eo sees average daytime highs of 31°C and overnight lows near 23°C, with 64 mm of rain across 9.2 wet days and about 11.4 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 17% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 24 min at the start of December to 11 h 24 min by month's end. Set against the rest of the year, December is Óc Eo's 5th-clearest and 6th-windiest month. For the whole year in context, see Óc Eo's year-round climate.

Daytime high
31°
11th warmest
Overnight low
23°
3rd coldest
Rainfall
64 mm
9.2 wet days
Daylight
11 h 24 min
6:13 AM – 5:38 PM
Cloud cover
70%
5th clearest
Wind
9 km/h
6th windiest
Solar energy
4.64 kWh/m²
Travel score
4.6
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical December day in Óc Eo reaches about 31°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113123
123123
133123
143123
153123
163123
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Óc Eo

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.

Óc Eo weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°274.911.55.2
Feb32° / 23°152.311.74.9
Mar34° / 25°446.811.93.4
Apr34° / 26°9313.612.22.5
May33° / 26°20125.812.52.2
Jun31° / 26°23327.112.62.5
Jul31° / 25°24228.212.52.6
Aug31° / 26°2422912.32.5
Sep31° / 25°28128.312.12.4
Oct31° / 25°30927.311.82.6
Nov31° / 24°14417.311.53.5
Dec31° / 23°649.211.44.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23268
33268
43268
53268
63367
73367
83367
93466
103466
113466
123565
133565
143466
153466
163565
173565
183565
193565
203466
213466
223466
233367
243367
253466
263565
273565
283565
293763
303664
313763

Chance of precipitation in December

Any precipitation

Óc Eo gets around 64 mm of rain over 9.2 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 30% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
142
241
340
438
538
637
736
835
935
1034
1133
1233
1332
1431
1530
1630
1729
1828
1928
2027
2126
2225
2324
2424
2523
2622
2722
2821
2921
3020
3120

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 53% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
103185128
204185127
304195225
404195324
504205422
604205521
704215520
805225518
905225617
1015235516
1115245515
1215245614
1316255513
1416265512
1516275511
1627275311
1727285310
1828285210
192829529
202929519
212930509
223930499
233931498
2421031498
2521032498
2621032497
272932507
282932507
292932516
301832536
311832536

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 24 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 grow by about 0 minutes over December. Sunrise moves from 6:06 AM to 6:20 AM, and sunset from 5:32 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:065:32
211.46:065:33
311.46:075:33
411.46:075:33
511.46:085:34
611.46:085:34
711.46:095:34
811.46:095:35
911.46:105:35
1011.46:105:35
1111.46:115:36
1211.46:115:36
1311.46:125:36
1411.46:125:37
1511.46:135:37
1611.46:135:38
1711.46:145:38
1811.46:145:39
1911.46:155:39
2011.46:155:39
2111.46:165:40
2211.46:165:40
2311.46:175:41
2411.46:175:41
2511.46:185:42
2611.46:185:42
2711.46:195:43
2811.46:195:43
2911.46:195:44
3011.46:205:44
3111.46:205:45

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.64 kWh/m².

For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 6.09 kWh/m² in April across the year — December's 4.64 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for Óc Eo

In seasonPeak

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

Óc Eo sits in the Pacific typhoon belt; the season peaks July–October.

Óc Eo'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 Óc Eo?

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

4.6
Sightseeing
3rd-best month of the year
6.6
Beach & pool
3rd-best month of the year

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

What to pack for Óc Eo in December

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

In December, Óc Eo sees daytime highs around 31°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Óc Eo 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 at the nearest coast (about 33 km away) 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 Óc Eo 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 Óc Eo peaks around August 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 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 19UV 13Dec 11UV 9
UV index (midday)Level
Jan10Extreme
Feb11Extreme
Mar12Extreme
Apr12Extreme
May11Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct10Very high
Nov9Very high
Dec9Very high

Air quality in Óc Eo 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 Óc Eo is worst in January — around 55 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (August, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1754 µg/m³Aug 1422 µg/m³
PM2.5 (µg/m³)Level
Jan55Poor
Feb49Poor
Mar44Poor
Apr40Poor
May33Moderate
Jun25Moderate
Jul24Moderate
Aug21Moderate
Sep27Moderate
Oct39Poor
Nov47Poor
Dec48Poor
Location & terrain

Where is Óc Eo?

Óc Eo sits at 10.2°N, 105.2°E, 2 m above sea level, in Vietnam. The nearest listed city is Núi Sập, 12 km away.

Topography around Óc Eo

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

Within 3 km, the terrain around Óc Eo has only modest variations in elevation — a maximum elevation change of 211 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 211 m; within 80 km, large variations in elevation — a maximum elevation change of 691 m.

The land around Óc Eo is covered by cropland (77%) within 3 km, cropland (92%) within 16 km, and cropland (61%) and water (21%) within 80 km.

3 km
211 m
16 km
211 m
80 km
691 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Núi Sập 12 km · Cô Tô 19 km · Vĩnh Thạnh 27 km · Rạch Giá 27 km · Cờ Đỏ 34 km · Long Xuyên 35 km · Thốt Nốt 42 km · Kiến An 43 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 Óc Eo (10.2421°, 105.155°, elevation 2 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).