Muan weather in January

In January, Muan sees average daytime highs of 6°C and overnight lows near -1°C, with 26 mm of precipitation across 4.6 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 16% 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 Muan's 11th-clearest and 1st-windiest month. For the whole year in context, see Muan's year-round climate.

Daytime high
12th warmest
Overnight low
-1°
1st coldest
Precipitation
26 mm
4.6 wet days
Daylight
9 h 54 min
7:47 AM – 5:40 PM
Cloud cover
69%
11th clearest
Wind
15 km/h
1st windiest
Solar energy
2.46 kWh/m²
Travel score
0.4
out of 10

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 Muan reaches about 6°C in the afternoon and slips back to -1°C overnight — a 7°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.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
170
270
360
460
56-1
66-1
76-1
86-1
96-1
106-1
116-1
126-1
136-1
146-1
156-1
166-1
176-1
186-1
196-1
206-1
216-1
226-1
236-1
246-1
256-1
266-1
276-1
286-1
296-1
306-1
316-1

How January really feels in Muan

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.

Muan 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 / -1°264.629.90.4
Feb / 345.10.910.71.3
Mar12° / 5970.411.73.6
Apr18° / 817.5012.96.1
May23° / 13°927.9013.87.1
Jun26° / 18°1569.4014.36.4
Jul29° / 23°21915.2014.14.8
Aug30° / 24°20614.6013.34.4
Sep27° / 19°1478.9012.26.7
Oct21° / 13°524.3011.17.7
Nov15° / 456010.25.0
Dec / 264.51.49.71.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 17% of January, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
33763
43763
53763
63763
73664
83565
93565
103565
113466
123367
133367
143268
153169
163169
173169
183169
193268
203169
213169
223169
233169
243268
253268
263268
273367
283367
293466
303565
313565

Chance of precipitation in January

Any precipitationSnow

Muan gets around 26 mm of rain and snow over 4.6 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 15% and peaks near 16% on the wettest days, and about 2 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1116
2116
3126
4126
5126
6126
7136
8136
9146
10146
11156
12156
13156
14157
15167
16167
17167
18167
19167
20167
21167
22167
23167
24167
25166
26166
27166
28166
29166
30166
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 15 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 15 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

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 7:47 AM to 7:40 AM, and sunset from 5:28 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:475:28
29.77:475:28
39.77:475:29
49.77:475:30
59.77:475:31
69.77:475:31
79.77:475:32
89.87:485:33
99.87:485:34
109.87:475:35
119.87:475:36
129.87:475:36
139.87:475:37
149.97:475:38
159.97:475:39
169.97:475:40
179.97:465:41
189.97:465:42
199.97:465:43
2010.07:465:44
2110.07:455:45
2210.07:455:46
2310.07:455:47
2410.17:445:48
2510.17:445:49
2610.17:435:50
2710.17:435:51
2810.27:425:52
2910.27:425:53
3010.27:415:54
3110.27:405:55

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.46 kWh/m².

For context, solar energy here swings from a low near 2.23 kWh/m² to a high of 5.91 kWh/m² in May across the year — January's 2.46 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.3Moderate
112.3Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.4Moderate
162.4Moderate
172.4Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.9Moderate
Planning a trip in January

Hazard calendar for Muan

In seasonPeak

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

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

Muan'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 Muan?

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

0.4
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 Muan.

What to pack for Muan in January

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

In January, Muan sees daytime highs around 6°C and nights near -1°C. Pack a warm layer. Worth having: a heavy coat. About 5 days see rain.

a warm layera heavy coat

Sea temperature near Muan 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 36 km away) is warmest in August at about 25°C and coldest in February near 7°C.

It's comfortable for a long swim from Jun 28 to Oct 9 — about 3.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan8Bracing
Feb7Bracing
Mar7Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul22Refreshing
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec11Bracing

UV index in Muan 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 Muan peaks around June 21 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highHighModerateJun 21UV 8Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug8Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Muan 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 Muan 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 Muan?

Muan sits at 35.0°N, 126.5°E, 21 m above sea level, in South Korea. The nearest listed city is Mokpo, 21 km away.

MasanSinanGwangjuJangseong

Topography around Muan

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

Within 3 km, the terrain around Muan has significant variations in elevation — a maximum elevation change of 284 m around an average of 55 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 345 m; within 80 km, large variations in elevation — a maximum elevation change of 1,171 m.

The land around Muan is covered by trees (52%) and cropland (31%) within 3 km, cropland (36%), trees (33%) and water (20%) within 16 km, and water (45%) and trees (34%) within 80 km.

3 km
284 m
16 km
345 m
80 km
1,171 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Mokpo 21 km · Naju 22 km · Yeongam 29 km · Yeonggwang 32 km · Masan 36 km · Sinan 38 km · Gwangju 44 km · Jangseong 44 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 Muan (34.9901°, 126.479°, elevation 21 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).