Naju weather in January

In January, Naju sees average daytime highs of 6°C and overnight lows near -3°C, with 26 mm of precipitation across 4.5 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 6°C through the month. The sky is clear or mostly clear about 21% 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 Naju's 9th-clearest and 2nd-windiest month. For the whole year in context, see Naju's year-round climate.

Daytime high
12th warmest
Overnight low
-3°
1st coldest
Precipitation
26 mm
4.5 wet days
Daylight
9 h 54 min
7:46 AM – 5:39 PM
Cloud cover
65%
9th clearest
Wind
12 km/h
2nd windiest
Solar energy
2.56 kWh/m²
Travel score
0.3
out of 10

Naju is city in South Korea.

Density
70/km²
people per km²

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 6°C through the month.

A typical January day in Naju reaches about 6°C in the afternoon and slips back to -3°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 1°C and 10°C. Set against its neighbours, January runs about 3°C cooler than December and about 2°C cooler than February.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
16-2
26-2
36-2
46-2
56-2
66-2
76-2
86-2
96-2
106-2
116-2
126-3
136-3
145-3
155-3
165-3
175-3
185-3
195-3
205-3
215-3
225-3
235-3
245-3
255-3
265-3
276-3
286-3
296-3
306-3
316-3

How January really feels in Naju

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.

Naju weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°264.51.99.90.3
Feb / -1°355.10.910.71.4
Mar13° / 647.30.611.74.0
Apr19° / 877.6012.96.4
May24° / 13°998.2013.87.1
Jun27° / 18°16410.3014.36.1
Jul29° / 22°24316.4014.14.5
Aug30° / 23°22515.9013.34.2
Sep27° / 18°1429.4012.26.5
Oct22° / 11°534.6011.17.6
Nov15° / 466.10.110.24.9
Dec / -1°2741.19.71.6

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 18% of January, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24357
34357
44357
54258
64159
74159
84060
94060
104060
113961
123961
133862
143862
153763
163664
173664
183664
193763
203664
213664
223763
233763
243763
253763
263862
273862
283961
293961
304060
314060

Chance of precipitation in January

Any precipitationSnow

Naju gets around 26 mm of rain and snow over 4.5 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 14% and peaks near 16% on the wettest days, and about 2 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1116
2126
3127
4127
5126
6126
7126
8136
9136
10136
11136
12146
13146
14146
15156
16156
17156
18156
19166
20166
21166
22166
23166
24166
25166
26166
27166
28166
29165
30165
31165

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 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
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

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 7:46 AM to 7:39 AM, and sunset from 5:27 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:465:27
29.77:465:27
39.77:465:28
49.77:465:29
59.77:465:30
69.77:475:30
79.77:475:31
89.87:475:32
99.87:475:33
109.87:475:34
119.87:475:35
129.87:465:35
139.87:465:36
149.87:465:37
159.97:465:38
169.97:465:39
179.97:465:40
189.97:455:41
199.97:455:42
2010.07:455:43
2110.07:445:44
2210.07:445:45
2310.07:445:46
2410.17:435:47
2510.17:435:48
2610.17:425:49
2710.17:425:50
2810.27:415:50
2910.27:415:51
3010.27:405:52
3110.27:395:53

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.56 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.86 kWh/m² in May across the year — January's 2.56 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.4Moderate
102.4Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.7Moderate
232.7Moderate
242.7Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.9Moderate
292.9Moderate
302.9Moderate
313.0Moderate
Planning a trip in January

Hazard calendar for Naju

In seasonPeak

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

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

Naju's rainy season runs June–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 Naju?

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

0.3
Sightseeing
12th-best month of the year
0.0
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Naju.

What to pack for Naju in January

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

In January, Naju sees daytime highs around 6°C and nights near -3°C. Pack a warm layer. Worth having: a heavy coat. About 5 days see rain.

a warm layera heavy coat

Sea temperature near Naju in January

The nearest coast averages about 8°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 49 km away) is warmest in August at about 25°C and coldest in February near 6°C.

It's comfortable for a long swim from Jun 26 to Oct 11 — about 3.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan8Bracing
Feb6Bracing
Mar7Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec11Bracing

UV index in Naju 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 Naju peaks around July 12 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 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 highModerateJul 12UV 8Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug7Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Naju 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 Naju is worst in March — around 61 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (August, 28 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorModerateMar 1960 µg/m³Aug 1129 µg/m³
PM2.5 (µg/m³)Level
Jan41Poor
Feb48Poor
Mar61Unhealthy
Apr54Poor
May45Poor
Jun39Poor
Jul29Moderate
Aug28Moderate
Sep33Moderate
Oct35Moderate
Nov38Poor
Dec34Moderate
Location & terrain

Where is Naju?

Naju sits at 35.0°N, 126.7°E, 25 m above sea level, in South Korea. The nearest listed city is Masan, 15 km away.

Mokpo

Topography around Naju

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

Within 3 km, the terrain around Naju has significant variations in elevation — a maximum elevation change of 429 m around an average of 56 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 457 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,477 m.

The land around Naju is covered by trees (46%) and cropland (26%) within 3 km, trees (45%) and cropland (37%) within 16 km, and trees (44%), water (32%) and cropland (20%) within 80 km.

3 km
429 m
16 km
457 m
80 km
1,477 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Masan 15 km · Muan 22 km · Gwangju 23 km · Hwasun 25 km · Yeongam 25 km · Jangseong 30 km · Yeonggwang 33 km · Mokpo 38 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 Naju (35.0292°, 126.7175°, elevation 25 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).