Thị Trấn Đầm Hà weather in December

In December, Thị Trấn Đầm Hà sees average daytime highs of 19°C and overnight lows near 16°C, with 62 mm of rain across 9.9 wet days and about 10.7 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 33% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of December to 10 h 42 min by month's end. Set against the rest of the year, December is Thị Trấn Đầm Hà's 3rd-clearest and 1st-windiest month. For the whole year in context, see Thị Trấn Đầm Hà's year-round climate.

Daytime high
19°
10th warmest
Overnight low
16°
3rd coldest
Rainfall
62 mm
9.9 wet days
Daylight
10 h 42 min
6:25 AM – 5:07 PM
Cloud cover
60%
3rd clearest
Wind
15 km/h
1st windiest
Solar energy
2.91 kWh/m²
Travel score
6.2
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 18°C by the end.

A typical December day in Thị Trấn Đầm Hà reaches about 19°C in the afternoon and slips back to 16°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12118
22118
32118
42118
52117
62017
72017
82017
92017
102017
112017
122017
132016
141916
151916
161916
171916
181916
191916
201916
211916
221916
231916
241916
251916
261916
271815
281815
291815
301815
311815

How December really feels in Thị Trấn Đầm Hà

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.

Thị Trấn Đầm Hà weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan17° / 15°8614.210.85.0
Feb18° / 16°6613.111.35.2
Mar21° / 18°9115.611.85.3
Apr24° / 22°8013.312.56.1
May27° / 25°21318.9135.0
Jun29° / 27°32023.613.33.5
Jul29° / 27°4242513.23.4
Aug29° / 26°4162512.73.5
Sep29° / 26°27619.212.14.5
Oct27° / 24°10911.111.56.7
Nov23° / 20°689.5117.0
Dec19° / 16°629.910.76.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25149
35050
44852
54753
64654
74555
84456
94357
104159
114159
124159
134159
144258
154258
164258
174357
184357
194357
204456
214456
224456
234456
244456
254456
264555
274555
284456
294258
304159
314159

Chance of precipitation in December

Any precipitation

Thị Trấn Đầm Hà gets around 62 mm of rain over 9.9 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
132
232
332
433
533
633
733
833
933
1033
1133
1233
1333
1432
1532
1632
1732
1832
1932
2032
2132
2232
2332
2432
2532
2633
2733
2834
2935
3036
3137

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1352221166
2362221156
3372320155
4382319145
5392418145
6412417134
7422417134
8432516134
9442515133
10462415123
11472414122
12482414122
13492314122
14502314131
15502214131
16502214131
17502214131
18512214121
19532114120
20522115120
21532115110
22532215100
23522216100
2453221690
2552221790
2651231880
2750231980
2851231970
2949232070
3048232170
3148232270

Wind in December

Winds average 15 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 14 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
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 48 min at the start of December to 10 h 42 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 6:16 AM to 6:31 AM, and sunset from 5:03 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:165:03
210.86:165:03
310.86:175:03
410.86:175:04
510.86:185:04
610.86:195:04
710.76:195:04
810.76:205:04
910.76:215:05
1010.76:215:05
1110.76:225:05
1210.76:225:06
1310.76:235:06
1410.76:235:06
1510.76:245:07
1610.76:255:07
1710.76:255:07
1810.76:265:08
1910.76:265:08
2010.76:275:09
2110.76:275:09
2210.76:285:10
2310.76:285:10
2410.76:295:11
2510.76:295:11
2610.76:295:12
2710.76:305:12
2810.76:305:13
2910.76:315:13
3010.76:315:14
3110.76:315:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.91 kWh/m².

For context, solar energy here swings from a low near 2.61 kWh/m² to a high of 4.89 kWh/m² in May across the year — December's 2.91 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.0Moderate
33.0Moderate
43.0Moderate
53.0Moderate
63.0Moderate
72.9Moderate
82.9Moderate
92.9Moderate
102.9Moderate
112.9Moderate
122.9Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.9Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.8Moderate
312.8Moderate
Planning a trip in December

Hazard calendar for Thị Trấn Đầm Hà

In seasonPeak

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

Thị Trấn Đầm Hà sits in the Pacific typhoon belt; the season peaks July–October.

Thị Trấn Đầm Hà's monsoon runs May–September, 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 Thị Trấn Đầm Hà?

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

6.2
Sightseeing
3rd-best month of the year
2.9
Beach & pool
10th-best month of the year

December is a reasonable time to visit Thị Trấn Đầm Hà for sightseeing.

What to pack for Thị Trấn Đầm Hà in December

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

In December, Thị Trấn Đầm Hà sees daytime highs around 19°C and nights near 16°C. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near Thị Trấn Đầm Hà in December

The nearest coast averages about 21°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 26 km away) is warmest in August at about 30°C and coldest in February near 19°C.

It's comfortable for a long swim from Mar 15 to Jan 4 — about 9.7 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar20Refreshing
Apr23Refreshing
May27Warm
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov25Warm
Dec21Refreshing

UV index in Thị Trấn Đầm Hà in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Thị Trấn Đầm Hà peaks around July 11 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 11UV 12Dec 19UV 6
UV index (midday)Level
Jan7High
Feb8Very high
Mar9Very high
Apr8Very high
May10Extreme
Jun12Extreme
Jul12Extreme
Aug9Very high
Sep10Very high
Oct9Very high
Nov7High
Dec6High

Air quality in Thị Trấn Đầm Hà 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 Thị Trấn Đầm Hà is worst in January — around 42 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (July, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 2342 µg/m³Jul 1716 µg/m³
PM2.5 (µg/m³)Level
Jan42Poor
Feb42Poor
Mar41Poor
Apr40Poor
May26Moderate
Jun19Moderate
Jul16Moderate
Aug18Moderate
Sep21Moderate
Oct27Moderate
Nov29Moderate
Dec39Poor
Location & terrain

Where is Thị Trấn Đầm Hà?

Thị Trấn Đầm Hà sits at 21.4°N, 107.6°E, 19 m above sea level, in Vietnam. The nearest listed city is Thị Trấn Tiên Yên, 20 km away.

Topography around Thị Trấn Đầm Hà

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Thị Trấn Đầm Hà.

Within 3 km, the terrain around Thị Trấn Đầm Hà has only modest variations in elevation — a maximum elevation change of 58 m around an average of 17 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,238 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,582 m.

The land around Thị Trấn Đầm Hà is covered by trees (51%) and cropland (36%) within 3 km, trees (44%) and water (41%) within 16 km, and trees (55%) and water (40%) within 80 km.

3 km
58 m
16 km
1,238 m
80 km
1,582 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Thị Trấn Tiên Yên 20 km · Thị Trấn Ba Chẽ 34 km · Móng Cái 43 km · Cẩm Phả Mines 48 km · Cẩm Phả 51 km · Ha Long 70 km · Thị Trấn Na Dương 77 km · Cát Bà 90 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 Thị Trấn Đầm Hà (21.3531°, 107.5972°, elevation 19 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).