Thị Trấn Lam Sơn weather in December

In December, Thị Trấn Lam Sơn sees average daytime highs of 22°C and overnight lows near 15°C, with 33 mm of rain across 6.3 wet days and about 10.8 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 24% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of December to 10 h 48 min by month's end. Set against the rest of the year, December is Thị Trấn Lam Sơn's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Thị Trấn Lam Sơn's year-round climate.

Daytime high
22°
11th warmest
Overnight low
15°
2nd coldest
Rainfall
33 mm
6.3 wet days
Daylight
10 h 48 min
6:30 AM – 5:19 PM
Cloud cover
66%
3rd clearest
Wind
7 km/h
2nd windiest
Solar energy
2.69 kWh/m²
Travel score
7.0
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 21°C by the end.

A typical December day in Thị Trấn Lam Sơn reaches about 22°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 26°C. Set against its neighbours, December runs about 4°C cooler than November and about 1°C warmer than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12317
22317
32317
42317
52317
62316
72216
82216
92216
102216
112216
122216
132216
142215
152215
162215
172115
182115
192115
202115
212115
222115
232115
242115
252115
262115
272115
282115
292115
302115
312115

How December really feels in Thị Trấn Lam Sơn

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 Lam Sơn weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 15°387.510.96.4
Feb22° / 16°287.111.36.6
Mar25° / 18°559.911.96.5
Apr29° / 22°8510.912.45.2
May32° / 25°19617.612.93.2
Jun33° / 26°19216.513.22.6
Jul33° / 26°23319.613.12.6
Aug32° / 26°32624.412.72.6
Sep31° / 24°26520.612.13.4
Oct28° / 22°16114.611.55.3
Nov25° / 19°628.111.17.0
Dec22° / 15°336.310.87.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34159
44060
53961
63961
73862
83862
93862
103862
113862
123862
133961
143961
153961
163961
174060
184060
194060
203961
214060
223961
233961
243862
253961
263763
273664
283664
293466
303367
313268

Chance of precipitation in December

Any precipitation

Thị Trấn Lam Sơn gets around 33 mm of rain over 6.3 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 20% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
125
225
324
424
523
623
722
822
921
1021
1120
1219
1319
1418
1518
1618
1718
1818
1918
2018
2118
2218
2319
2419
2519
2620
2720
2821
2921
3022
3122

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12020262311
22120262211
32220262110
4232026219
5242126209
6262126198
7272126197
8282226186
9292225186
10312225185
11322124184
12342124184
13352123183
14362023183
15372022183
16381922183
17381922183
18391922173
19401922173
20401922172
21401923162
22401923152
23401924152
24401925152
25401925142
26391925152
27391926151
28381926151
29371926161
30371926171
31361926171

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 54 min at the start of December to 10 h 48 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 6:22 AM to 6:37 AM, and sunset from 5:15 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.96:225:15
210.96:225:15
310.96:235:15
410.96:235:15
510.96:245:15
610.86:255:16
710.86:255:16
810.86:265:16
910.86:275:16
1010.86:275:17
1110.86:285:17
1210.86:285:17
1310.86:295:18
1410.86:295:18
1510.86:305:18
1610.86:305:19
1710.86:315:19
1810.86:325:19
1910.86:325:20
2010.86:335:20
2110.86:335:21
2210.86:335:21
2310.86:345:22
2410.86:345:22
2510.86:355:23
2610.86:355:23
2710.86:365:24
2810.86:365:24
2910.86:365:25
3010.86:375:25
3110.86:375:26

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.69 kWh/m².

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.24 kWh/m² in June across the year — December's 2.69 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.8Moderate
42.8Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.7Moderate
102.7Moderate
112.7Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.7Moderate
202.7Moderate
212.7Moderate
222.7Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Thị Trấn Lam Sơn

In seasonPeak

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

Thị Trấn Lam Sơn sits in the Pacific typhoon belt; the season peaks July–October.

Thị Trấn Lam Sơn'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 Thị Trấn Lam Sơn?

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

7.0
Sightseeing
1st-best month of the year
4.7
Beach & pool
8th-best month of the year

December is one of the better times to visit Thị Trấn Lam Sơn for general sightseeing.

What to pack for Thị Trấn Lam Sơn in December

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

In December, Thị Trấn Lam Sơn sees daytime highs around 22°C and nights near 15°C. Little to plan around — just the basics. About 6 days see rain.

Sea temperature near Thị Trấn Lam Sơn in December

The nearest coast averages about 23°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 58 km away) is warmest in August at about 30°C and coldest in February near 21°C.

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

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar21Refreshing
Apr24Refreshing
May28Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Thị Trấn Lam Sơn 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 Lam Sơn peaks around August 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighAug 13UV 12Dec 15UV 6
UV index (midday)Level
Jan7High
Feb8Very high
Mar10Very high
Apr7Very high
May8Very high
Jun13Extreme
Jul11Extreme
Aug13Extreme
Sep9Very high
Oct8Very high
Nov7High
Dec6High

Air quality in Thị Trấn Lam Sơn 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 Lam Sơn is worst in December — around 134 µg/m³ PM2.5 (unhealthy), about 3.8× the cleanest month (July, 35 µg/m³).

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

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 20132 µg/m³Jul 1536 µg/m³
PM2.5 (µg/m³)Level
Jan126Unhealthy
Feb106Unhealthy
Mar94Unhealthy
Apr87Unhealthy
May60Unhealthy
Jun42Poor
Jul35Moderate
Aug46Poor
Sep69Unhealthy
Oct93Unhealthy
Nov116Unhealthy
Dec134Unhealthy
Location & terrain

Where is Thị Trấn Lam Sơn?

Thị Trấn Lam Sơn sits at 19.9°N, 105.4°E, 22 m above sea level, in Vietnam. The nearest listed city is Thanh Hóa, 40 km away.

Topography around Thị Trấn Lam Sơn

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

Within 3 km, the terrain around Thị Trấn Lam Sơn has only modest variations in elevation — a maximum elevation change of 166 m around an average of 29 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 760 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,381 m.

The land around Thị Trấn Lam Sơn is covered by trees (60%) and cropland (27%) within 3 km, trees (70%) and cropland (24%) within 16 km, and trees (71%) within 80 km.

3 km
166 m
16 km
760 m
80 km
2,381 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Thanh Hóa 40 km · Bỉm Sơn 51 km · Sầm Sơn 55 km · Nga Sơn 60 km · Ninh Binh 72 km · Nghi Sơn 78 km · Hoàng Mai 78 km · Bo 86 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 Lam Sơn (19.9047°, 105.4056°, elevation 22 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).