Long Xuyên weather in December

In December, Long Xuyên sees average daytime highs of 31°C and overnight lows near 24°C, with 57 mm of rain across 8.5 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 18% 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 Long Xuyên's 5th-clearest and 7th-windiest month. For the whole year in context, see Long Xuyên's year-round climate.

Daytime high
31°
11th warmest
Overnight low
24°
3rd coldest
Rainfall
57 mm
8.5 wet days
Daylight
11 h 24 min
6:13 AM – 5:36 PM
Cloud cover
69%
5th clearest
Wind
8 km/h
7th windiest
Solar energy
4.64 kWh/m²
Travel score
4.7
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 Long Xuyên reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°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
113124
123124
133124
143124
153124
163124
173123
183123
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Long Xuyên

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.

Long Xuyên 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
Jan30° / 23°254.411.55.3
Feb32° / 23°141.711.75.0
Mar34° / 25°345.711.93.6
Apr34° / 26°8212.812.22.6
May33° / 26°17523.912.52.2
Jun32° / 26°20726.412.62.4
Jul31° / 26°21827.812.52.4
Aug31° / 26°22028.112.32.4
Sep31° / 25°26127.912.12.3
Oct31° / 25°28126.911.82.5
Nov31° / 25°13816.211.53.5
Dec31° / 24°578.511.44.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% 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 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33466
43466
53466
63565
73565
83565
93565
103664
113664
123664
133565
143664
153664
163664
173664
183664
193565
203565
213664
223664
233664
243763
253763
263763
273862
283862
293961
303961
314060

Chance of precipitation in December

Any precipitation

Long Xuyên gets around 57 mm of rain over 8.5 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 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
239
337
436
535
634
733
833
932
1031
1130
1229
1329
1428
1528
1627
1727
1826
1926
2025
2124
2224
2323
2422
2522
2621
2720
2820
2919
3019
3118

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 50% 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 (%)
103184731
203194830
304194829
404204828
504214927
604214925
704225024
804225123
905235022
1015235021
1115245119
1215245218
1315255118
1416255117
1516265116
1626265115
1727265015
1827265015
1927274914
2028274914
2128274913
2228284913
2329284912
2429284912
2529284911
2629285011
2729285110
2828285210
292827549
301827568
311727578

Wind in December

Winds average 8 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
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
159calm
169calm
179calm
189calm
199calm
209calm
218calm
228calm
238calm
248calm
258calm
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 6:05 AM to 6:19 AM, and sunset from 5:31 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:055:31
211.46:055:31
311.46:065:32
411.46:065:32
511.46:075:32
611.46:075:33
711.46:085:33
811.46:085:33
911.46:095:34
1011.46:105:34
1111.46:105:34
1211.46:115:35
1311.46:115:35
1411.46:125:35
1511.46:125:36
1611.46:135:36
1711.46:135:37
1811.46:145:37
1911.46:145:38
2011.46:155:38
2111.46:155:39
2211.46:155:39
2311.46:165:39
2411.46:165:40
2511.46:175:40
2611.46:175:41
2711.46:185:41
2811.46:185:42
2911.46:195:42
3011.46:195:43
3111.46:195:43

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 6.03 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
184.6Bright
194.6Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for Long Xuyên

In seasonPeak

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

Long Xuyên sits in the Pacific typhoon belt; the season peaks July–October.

Long Xuyên'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 Long Xuyên?

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

4.7
Sightseeing
3rd-best month of the year
6.7
Beach & pool
4th-best month of the year

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

What to pack for Long Xuyên in December

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

In December, Long Xuyên sees daytime highs around 31°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Long Xuyên 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 68 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 Long Xuyên 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 Long Xuyên peaks around August 22 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 22UV 13Dec 11UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct9Very high
Nov9Very high
Dec9Very high

Air quality in Long Xuyên 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 Long Xuyên is worst in January — around 72 µg/m³ PM2.5 (unhealthy), about 2.4× the cleanest month (August, 30 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 1172 µg/m³Aug 1331 µg/m³
PM2.5 (µg/m³)Level
Jan72Unhealthy
Feb59Unhealthy
Mar53Poor
Apr53Poor
May47Poor
Jun38Poor
Jul34Moderate
Aug30Moderate
Sep40Poor
Oct56Unhealthy
Nov68Unhealthy
Dec70Unhealthy
Location & terrain

Where is Long Xuyên?

Long Xuyên sits at 10.4°N, 105.4°E, 8 m above sea level, in Vietnam. The nearest listed city is Thốt Nốt, 17 km away.

Topography around Long Xuyên

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

Within 3 km, the terrain around Long Xuyên has only modest variations in elevation — a maximum elevation change of 15 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 23 m; within 80 km, large variations in elevation — a maximum elevation change of 680 m.

The land around Long Xuyên is covered by artificial surfaces (41%) and trees (21%) within 3 km, cropland (61%) and trees (21%) within 16 km, and cropland (70%) and trees (20%) within 80 km.

3 km
15 m
16 km
23 m
80 km
680 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Thốt Nốt 17 km · Vĩnh Thạnh 19 km · Kiến An 21 km · Lai Vung 23 km · Núi Sập 23 km · Cao Lãnh 23 km · Cờ Đỏ 33 km · Quận Đức Thịnh 34 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 Long Xuyên (10.3864°, 105.4352°, elevation 8 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).