Nga Sơn weather in January

In January, Nga Sơn sees average daytime highs of 20°C and overnight lows near 16°C, with 32 mm of rain across 6.3 wet days and about 10.9 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 15% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of January to 11 h 06 min by month's end. Set against the rest of the year, January is Nga Sơn's 9th-clearest and 8th-windiest month. For the whole year in context, see Nga Sơn's year-round climate.

Daytime high
20°
12th warmest
Overnight low
16°
1st coldest
Rainfall
32 mm
6.3 wet days
Daylight
10 h 54 min
6:38 AM – 5:33 PM
Cloud cover
75%
9th clearest
Wind
12 km/h
8th windiest
Solar energy
2.53 kWh/m²
Travel score
6.5
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical January day in Nga Sơn reaches about 20°C in the afternoon and slips back to 16°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12116
22116
32016
42016
52016
62016
72016
82016
92016
102016
112016
122016
132016
142016
152016
162016
172016
182016
192016
202016
212016
222015
232015
242015
252015
262015
272016
282016
292016
302016
312016

How January really feels in Nga Sơn

Once humidity and wind are folded in, January 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

January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Nga Sơn weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 16°326.310.96.5
Feb21° / 17°173.911.36.9
Mar23° / 19°34611.97.1
Apr27° / 23°60712.46.7
May30° / 26°16714.412.94.2
Jun32° / 28°16614.113.23.2
Jul32° / 28°22616.413.13.1
Aug31° / 27°31922.312.73.0
Sep30° / 26°31020.612.13.6
Oct28° / 23°18014.411.55.5
Nov25° / 20°678.411.17.0
Dec22° / 17°315.810.87.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 72%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33367
43268
53169
63169
73070
83169
93070
102971
112872
122872
132872
142872
152773
162674
172575
182575
192575
202575
212575
222575
232476
242476
252476
262476
272476
282476
292476
302575
312575

Chance of precipitation in January

Any precipitation

Nga Sơn gets around 32 mm of rain over 6.3 wet days in January. 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 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
121
222
322
422
523
623
723
823
923
1023
1122
1222
1321
1420
1520
1619
1719
1819
1918
2018
2118
2217
2317
2417
2517
2617
2717
2816
2916
3016
3116

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1361922222
2361822222
3361821232
4361821242
5361820242
6361719252
7371719252
8371718253
9371718253
10381718253
11381718243
12391618243
13391618233
14391619233
15401619233
16401619223
17411619223
18411619212
19421519212
20421520212
21431520212
22431520212
23441420212
24441420212
25441420212
26441419212
27441419212
28441419222
29431419222
30431419222
31421419223

Wind in January

Winds average 12 km/h in January.

Across January, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 48 min at the start of January to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 6:35 AM to 6:37 AM, and sunset from 5:24 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:355:24
210.86:355:24
310.86:365:25
410.86:365:25
510.86:365:26
610.86:365:27
710.86:375:27
810.86:375:28
910.96:375:28
1010.96:375:29
1110.96:375:30
1210.96:385:30
1310.96:385:31
1410.96:385:31
1510.96:385:32
1610.96:385:33
1710.96:385:33
1810.96:385:34
1910.96:385:35
2011.06:385:35
2111.06:385:36
2211.06:385:37
2311.06:385:37
2411.06:385:38
2511.06:385:38
2611.06:385:39
2711.06:385:40
2811.06:375:40
2911.16:375:41
3011.16:375:42
3111.16:375:42

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.53 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 5.46 kWh/m² in June across the year — January's 2.53 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.6Moderate
42.6Moderate
52.6Moderate
62.5Moderate
72.5Moderate
82.5Moderate
92.5Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.6Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.7Moderate
312.7Moderate
Planning a trip in January

Hazard calendar for Nga Sơn

In seasonPeak

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

Nga Sơn sits in the Pacific typhoon belt; the season peaks July–October.

Nga 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 January a good time to visit Nga Sơn?

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

6.5
Sightseeing
6th-best month of the year
3.4
Beach & pool
12th-best month of the year

January is a reasonable time to visit Nga Sơn for sightseeing.

What to pack for Nga Sơn in January

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

In January, Nga Sơn sees daytime highs around 20°C and nights near 16°C. Little to plan around — just the basics. About 6 days see rain.

Sea temperature near Nga Sơn in January

The nearest coast averages about 21°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in August at about 30°C and coldest in February near 20°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
Feb20Refreshing
Mar21Refreshing
Apr24Refreshing
May28Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov26Warm
Dec23Refreshing

UV index in Nga Sơn in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nga Sơn peaks around July 14 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 highHighJul 14UV 12Dec 15UV 6
UV index (midday)Level
Jan7Very high
Feb9Very high
Mar10Very high
Apr8Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep9Very high
Oct9Very high
Nov7High
Dec6High

Air quality in Nga Sơn in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Nga 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 Nga Sơn?

Nga Sơn sits at 20.0°N, 106.0°E, 8 m above sea level, in Vietnam. The nearest listed city is Bỉm Sơn, 14 km away.

Topography around Nga Sơn

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

Within 3 km, the terrain around Nga Sơn has only modest variations in elevation — a maximum elevation change of 30 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 253 m; within 80 km, large variations in elevation — a maximum elevation change of 989 m.

The land around Nga Sơn is covered by cropland (50%) and artificial surfaces (20%) within 3 km, cropland (37%), trees (23%) and water (20%) within 16 km, and trees (35%), cropland (29%) and water (28%) within 80 km.

3 km
30 m
16 km
253 m
80 km
989 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
January weather nearby: Bỉm Sơn 14 km · Ninh Binh 28 km · Sầm Sơn 31 km · Thanh Hóa 31 km · Nam Định 52 km · Thị Trấn Lam Sơn 60 km · Phủ Lý 60 km · Thái Bình 63 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 Nga Sơn (20.0072°, 105.9704°, 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).