Wanju weather in January

In January, Wanju sees average daytime highs of 4°C and overnight lows near -5°C, with 30 mm of precipitation across 5.9 wet days and about 9.8 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 4°C through the month. The sky is clear or mostly clear about 28% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Wanju's 9th-clearest and 3rd-windiest month. For the whole year in context, see Wanju's year-round climate.

Daytime high
12th warmest
Overnight low
-5°
1st coldest
Precipitation
30 mm
5.9 wet days
Daylight
9 h 48 min
7:46 AM – 5:35 PM
Cloud cover
59%
9th clearest
Wind
9 km/h
3rd windiest
Solar energy
2.62 kWh/m²
Travel score
0.0
out of 10

Wanju is administrative division of South Korea.

Density
102/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 4°C through the month.

A typical January day in Wanju reaches about 4°C in the afternoon and slips back to -5°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between -2°C and 8°C. Set against its neighbours, January runs about 2°C cooler than December and about 3°C cooler than February.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
14-4
24-4
34-4
44-4
54-4
64-4
74-5
84-5
94-5
104-5
113-5
123-5
133-5
143-5
153-5
163-5
173-5
183-5
193-5
203-5
213-5
223-5
233-5
243-5
253-5
263-5
274-5
284-5
294-5
304-5
314-5

How January really feels in Wanju

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.

Wanju 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 / -5°305.94.29.80.0
Feb / -3°375.52.410.60.6
Mar12° / 597.71.711.73.2
Apr18° / 858.20.212.96.0
May23° / 12°938.1013.97.1
Jun26° / 17°14910.7014.46.3
Jul28° / 22°25717014.24.8
Aug29° / 22°21716.7013.44.6
Sep25° / 16°1379012.26.8
Oct20° / 595.7011.17.2
Nov13° / 476.80.410.13.9
Dec / -3°326.22.89.60.5

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 19% of January, with mostly cloudy or overcast conditions the remaining 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25248
35149
44951
54951
64753
74753
84654
94654
104555
114555
124456
134456
144357
154357
164357
174357
184357
194357
204456
214456
224654
234654
244753
254852
265050
275050
285149
295149
305347
315347

Chance of precipitation in January

Any precipitationSnow

Wanju gets around 30 mm of rain and snow over 5.9 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 19% and peaks near 21% on the wettest days, and about 4 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
11813
21813
31813
41713
51712
61712
71712
81612
91712
101712
111712
121712
131812
141813
151913
161913
171913
182014
192014
202014
212114
222115
232115
242114
252114
262014
272014
281913
291913
301912
311812

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 9 km/h in January.

Across January, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 36 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 36 minutes over January. Sunrise moves from 7:46 AM to 7:39 AM, and sunset from 5:23 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.67:465:23
29.67:475:24
39.67:475:24
49.67:475:25
59.67:475:26
69.77:475:27
79.77:475:27
89.77:475:28
99.77:475:29
109.77:475:30
119.77:475:31
129.77:475:32
139.87:475:32
149.87:475:33
159.87:465:34
169.87:465:35
179.87:465:36
189.97:465:37
199.97:455:38
209.97:455:39
219.97:455:40
229.97:445:41
2310.07:445:42
2410.07:435:43
2510.07:435:44
2610.07:425:45
2710.17:425:46
2810.17:415:47
2910.17:415:48
3010.27:405:49
3110.27:395:50

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.62 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.85 kWh/m² in May across the year — January's 2.62 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.5Moderate
32.5Moderate
42.5Moderate
52.5Moderate
62.5Moderate
72.5Moderate
82.5Moderate
92.5Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.6Moderate
172.6Moderate
182.6Moderate
192.6Moderate
202.7Moderate
212.7Moderate
222.7Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.9Moderate
272.9Moderate
283.0Moderate
293.0Moderate
303.0Moderate
313.1Moderate
Planning a trip in January

Hazard calendar for Wanju

In seasonPeak

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

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

Wanju'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 Wanju?

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

0.0
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 Wanju.

What to pack for Wanju in January

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

In January, Wanju sees daytime highs around 4°C and nights near -5°C. Pack a warm layer and a heavy coat. About 6 days see rain.

a warm layera heavy coat

Sea temperature near Wanju in January

The nearest coast averages about 7°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 47 km away) is warmest in August at about 26°C and coldest in February near 6°C.

It's comfortable for a long swim from Jun 25 to Oct 10 — about 3.6 months when the water holds above 20°C.

0°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar6Bracing
Apr9Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep23Refreshing
Oct19Cool
Nov15Bracing
Dec10Bracing

UV index in Wanju 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 Wanju peaks around August 16 at about 8 (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 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 16UV 8Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr7High
May8Very high
Jun7Very high
Jul8Very high
Aug8Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Wanju 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 Wanju is worst in March — around 69 µg/m³ PM2.5 (unhealthy), about 1.8× the cleanest month (July, 39 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1668 µg/m³Jul 2239 µg/m³
PM2.5 (µg/m³)Level
Jan57Unhealthy
Feb61Unhealthy
Mar69Unhealthy
Apr59Unhealthy
May52Poor
Jun49Poor
Jul39Poor
Aug40Poor
Sep51Poor
Oct58Unhealthy
Nov61Unhealthy
Dec54Poor
Location & terrain

Where is Wanju?

Wanju sits at 35.8°N, 127.1°E, 56 m above sea level, in South Korea. The nearest listed city is Jeonju, 3.0 km away.

Jeongeup

Topography around Wanju

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

Within 3 km, the terrain around Wanju has only modest variations in elevation — a maximum elevation change of 117 m around an average of 47 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 770 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,862 m.

The land around Wanju is covered by artificial surfaces (62%) and trees (23%) within 3 km, trees (55%) and cropland (24%) within 16 km, and trees (61%) and cropland (20%) within 80 km.

3 km
117 m
16 km
770 m
80 km
1,862 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Jeonju 3.0 km · Namsa 13 km · Iksan 21 km · Kimje 24 km · Jinan-gun 26 km · Imsil 28 km · Yŏnmu 32 km · Jeongeup 34 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 Wanju (35.8451°, 127.1475°, elevation 56 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).