Yeosu weather in January

In January, Yeosu sees average daytime highs of 6°C and overnight lows near 2°C, with 34 mm of precipitation across 4.3 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 6°C through the month. The sky is clear or mostly clear about 46% 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 18 min by month's end. Set against the rest of the year, January is Yeosu's 4th-clearest and 1st-windiest month. For the whole year in context, see Yeosu's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
34 mm
4.3 wet days
Daylight
9 h 54 min
7:41 AM – 5:36 PM
Cloud cover
47%
4th clearest
Wind
19 km/h
1st windiest
Solar energy
2.92 kWh/m²
Travel score
0.6
out of 10

Yeosu is city in South Korea.

Density
534/km²
people per km²
Founded
~940 CE

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 Yeosu reaches about 6°C in the afternoon and slips back to 2°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 10°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
172
272
372
472
572
672
762
862
962
1062
1162
1262
1362
1462
1562
1662
1762
1861
1961
2061
2161
2261
2361
2461
2561
2661
2761
2861
2961
3061
3161

How January really feels in Yeosu

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.

Yeosu 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 daysDaylight (hours)Travel score
Jan / 344.39.90.6
Feb / 484.810.71.3
Mar11° / 927.411.72.8
Apr15° / 11°1348.512.84.5
May18° / 16°1478.413.86.2
Jun22° / 20°1949.414.36.4
Jul25° / 23°26813.614.16.1
Aug27° / 25°22412.613.36.2
Sep24° / 21°1608.912.27.0
Oct20° / 16°714.711.17.3
Nov14° / 10°505.410.24.7
Dec / 313.99.71.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
36832
46832
56832
66634
76535
86535
96436
106238
116238
126139
135941
145941
155941
165842
175842
185743
195743
205842
215842
225842
235941
245941
256040
266040
276139
286139
296238
306238
316238

Chance of precipitation in January

Any precipitation

Yeosu gets around 34 mm of rain and snow over 4.3 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 14% and peaks near 16% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)
110
210
310
410
510
610
711
811
912
1012
1113
1213
1313
1414
1514
1614
1715
1815
1915
2016
2116
2216
2316
2416
2516
2616
2716
2815
2915
3015
3114

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 19 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 19 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 min at the start of January to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:41 AM to 7:35 AM, and sunset from 5:24 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:415:24
29.77:425:24
39.77:425:25
49.77:425:26
59.77:425:27
69.87:425:27
79.87:425:28
89.87:425:29
99.87:425:30
109.87:425:31
119.87:425:31
129.87:425:32
139.97:425:33
149.97:425:34
159.97:425:35
169.97:415:36
179.97:415:37
189.97:415:38
1910.07:415:39
2010.07:405:40
2110.07:405:40
2210.07:405:41
2310.17:395:42
2410.17:395:43
2510.17:385:44
2610.17:385:45
2710.17:375:46
2810.27:375:47
2910.27:365:48
3010.27:365:49
3110.37:355:50

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.92 kWh/m².

For context, solar energy here swings from a low near 2.65 kWh/m² to a high of 5.79 kWh/m² in May across the year — January's 2.92 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.8Moderate
42.8Moderate
52.8Moderate
62.8Moderate
72.8Moderate
82.8Moderate
92.8Moderate
102.8Moderate
112.8Moderate
122.8Moderate
132.8Moderate
142.8Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.9Moderate
203.0Moderate
213.0Moderate
223.0Moderate
233.0Moderate
243.1Moderate
253.1Moderate
263.1Moderate
273.2Moderate
283.2Moderate
293.3Moderate
303.3Moderate
313.3Moderate
Planning a trip in January

Hazard calendar for Yeosu

In seasonPeak

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

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

Yeosu's rainy season runs April–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 Yeosu?

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

0.6
Sightseeing
12th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Yeosu.

What to pack for Yeosu in January

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

In January, Yeosu sees daytime highs around 6°C and nights near 2°C. Pack a warm layer. Worth having: a heavy coat. About 4 days see rain.

a warm layera heavy coat

Sea temperature near Yeosu in January

The nearest coast averages about 13°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 15 km away) is warmest in August at about 26°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 20 to Oct 22 — about 4.1 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr13Bracing
May16Cool
Jun20Cool
Jul23Refreshing
Aug26Warm
Sep24Warm
Oct21Refreshing
Nov17Cool
Dec14Bracing

UV index in Yeosu 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 Yeosu peaks around August 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. 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 highModerateAug 20UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep9Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Yeosu 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 Yeosu is worst in March — around 42 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (July, 18 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1841 µg/m³Jul 2318 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb35Poor
Mar42Poor
Apr37Poor
May31Moderate
Jun25Moderate
Jul18Moderate
Aug18Moderate
Sep22Moderate
Oct24Moderate
Nov27Moderate
Dec26Moderate
Location & terrain

Where is Yeosu?

Yeosu sits at 34.8°N, 127.7°E, 10 m above sea level, in South Korea. The nearest listed city is Gwangyang, 20 km away.

HadongKuryeBoseongChinju

Topography around Yeosu

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

Within 3 km, the terrain around Yeosu has significant variations in elevation — a maximum elevation change of 327 m around an average of 63 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 502 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,875 m.

The land around Yeosu is covered by trees (40%) and artificial surfaces (30%) within 3 km, water (52%) and trees (30%) within 16 km, and water (46%) and trees (44%) within 80 km.

3 km
327 m
16 km
502 m
80 km
1,875 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Gwangyang 20 km · Kwangyang 25 km · Suncheon 26 km · Beolgyo 31 km · Hadong 35 km · Kurye 53 km · Boseong 53 km · Chinju 62 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 Yeosu (34.7606°, 127.6621°, elevation 10 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).