Naesŏ weather in January

In January, Naesŏ sees average daytime highs of 7°C and overnight lows near -3°C, with 25 mm of precipitation across 3.6 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 7°C through the month. The sky is clear or mostly clear about 52% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Naesŏ's 3rd-clearest and 1st-windiest month. For the whole year in context, see Naesŏ's year-round climate.

Daytime high
12th warmest
Overnight low
-3°
1st coldest
Precipitation
25 mm
3.6 wet days
Daylight
9 h 54 min
7:39 AM – 5:31 PM
Cloud cover
43%
3rd clearest
Wind
10 km/h
1st windiest
Solar energy
2.99 kWh/m²
Travel score
1.2
out of 10

Naesŏ is human settlement in South Korea.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 7°C through the month.

A typical January day in Naesŏ reaches about 7°C in the afternoon and slips back to -3°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 11°C. Set against its neighbours, January runs about 2°C cooler than December and about 2°C cooler than February.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
18-2
28-2
38-2
47-2
57-2
67-2
77-2
87-2
97-3
107-3
117-3
127-3
137-3
147-3
157-3
167-3
177-3
187-3
197-3
207-3
217-3
227-3
237-3
247-3
257-3
267-3
277-3
287-3
297-3
308-3
318-2

How January really feels in Naesŏ

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 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
31
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Naesŏ weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°253.60.79.91.2
Feb10° / -1°354.30.410.72.4
Mar14° / 706.90.411.74.6
Apr20° / 977.7012.96.6
May24° / 13°1057.8013.87.2
Jun27° / 18°1529.4014.36.3
Jul29° / 23°22514.2014.14.7
Aug30° / 23°20214.3013.34.4
Sep27° / 18°1549.4012.26.5
Oct22° / 11°634.5011.17.7
Nov15° / 434.8010.15.5
Dec / -1°253.20.29.72.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 14% of January, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27327
37327
47129
57129
67030
77030
86832
96733
106733
116634
126535
136535
146436
156436
166436
176337
186337
196337
206436
216436
226436
236535
246535
256634
266634
276733
286733
296733
306733
316733

Chance of precipitation in January

Any precipitationSnow

Naesŏ gets around 25 mm of rain and snow over 3.6 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 11% and peaks near 13% on the wettest days, and about 1 day brings snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
182
282
382
492
592
692
792
8102
9102
10112
11112
12112
13122
14122
15122
16122
17132
18132
19132
20132
21132
22132
23132
24132
25132
26132
27132
28122
29122
30122
31112

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 10 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 min at the start of January to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 7:39 AM to 7:33 AM, and sunset from 5:19 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:395:19
29.77:395:20
39.77:405:20
49.77:405:21
59.77:405:22
69.77:405:23
79.77:405:23
89.77:405:24
99.87:405:25
109.87:405:26
119.87:405:27
129.87:405:28
139.87:405:29
149.87:405:29
159.87:395:30
169.97:395:31
179.97:395:32
189.97:395:33
199.97:385:34
209.97:385:35
2110.07:385:36
2210.07:375:37
2310.07:375:38
2410.07:375:39
2510.17:365:40
2610.17:365:41
2710.17:355:42
2810.17:345:43
2910.27:345:44
3010.27:335:45
3110.27:335:46

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.99 kWh/m².

For context, solar energy here swings from a low near 2.68 kWh/m² to a high of 5.84 kWh/m² in May across the year — January's 2.99 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.9Moderate
32.9Moderate
42.9Moderate
52.9Moderate
62.9Moderate
72.9Moderate
82.9Moderate
92.9Moderate
102.9Moderate
112.9Moderate
122.9Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.9Moderate
183.0Moderate
193.0Moderate
203.0Moderate
213.0Moderate
223.1Moderate
233.1Moderate
243.1Moderate
253.2Moderate
263.2Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.4Moderate
313.4Moderate
Planning a trip in January

Hazard calendar for Naesŏ

In seasonPeak

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

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

Naesŏ's rainy season runs May–September, 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 January a good time to visit Naesŏ?

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

1.2
Sightseeing
12th-best month of the year
0.0
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Naesŏ.

What to pack for Naesŏ in January

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

In January, Naesŏ sees daytime highs around 7°C and nights near -3°C. Pack a warm layer. Worth having: a heavy coat. About 4 days see rain.

a warm layera heavy coat

Sea temperature near Naesŏ in January

The nearest coast averages about 15°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 53 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 17 to Nov 5 — about 4.7 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Bracing
May17Cool
Jun20Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Naesŏ in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Naesŏ peaks around August 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Naesŏ 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 Naesŏ is worst in March — around 51 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (August, 29 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorMar 2051 µg/m³Aug 1029 µg/m³
PM2.5 (µg/m³)Level
Jan38Poor
Feb43Poor
Mar51Poor
Apr49Poor
May43Poor
Jun38Poor
Jul29Moderate
Aug29Moderate
Sep33Moderate
Oct36Poor
Nov40Poor
Dec35Moderate
Location & terrain

Where is Naesŏ?

Naesŏ sits at 35.2°N, 128.5°E, 62 m above sea level, in South Korea. The nearest listed city is Changwon, 15 km away.

MiryangGoseongChinjuSinhyeonKyosai

Topography around Naesŏ

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

Within 3 km, the terrain around Naesŏ has significant variations in elevation — a maximum elevation change of 526 m around an average of 151 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 752 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,871 m.

The land around Naesŏ is covered by trees (75%) within 3 km, trees (66%) within 16 km, and trees (54%) and water (30%) within 80 km.

3 km
526 m
16 km
752 m
80 km
1,871 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Changwon 15 km · Changnyeong 33 km · Kimhae 33 km · Miryang 34 km · Goseong 35 km · Chinju 40 km · Sinhyeon 42 km · Kyosai 45 km

South Korea travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
220 V · 60 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$36,227
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.5
per 100k, 2023
Road deaths
8.6
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 522
Religion
none 60%Protestant 17%Buddhist 16%Catholic 6%

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 Naesŏ (35.2497°, 128.52°, elevation 62 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).