Yesan in Winter
In winter (December, January and February), Yesan sees average daytime highs around 5°C and overnight lows near -3°C, with 72 mm of precipitation over about 14 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 5°C. The sky is clear or mostly clear about 30% of the time across winter, and the air most often feels dry.
Winter is Yesan's weakest season of the year to visit on our travel score. For the whole year in context, see Yesan's year-round climate.
- Avg daytime high
- 5°C
- coldest season of the year
- Avg overnight low
- -3°C
- Precipitation
- 72 mm
- 14 wet days
- Avg wind
- 10 km/h
- Travel score
- 0.3
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Yesan in Winter
Across winter, daytime highs hold fairly steady around 5°C.
A typical winter day in Yesan reaches about 5°C and drops to -3°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Yesan
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 90 that feel at or below 0°C.
The story in winter is cold — wind chill drags the overnight "feels like" below the raw low.
Yesan weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 3° / -5° | 22 | 4.5 | 3.1 | 9.8 | 0.0 |
| Feb | 6° / -3° | 27 | 4.2 | 1.7 | 10.6 | 0.4 |
| Mar | 11° / 1° | 41 | 6.1 | 1.1 | 11.7 | 3.2 |
| Apr | 18° / 7° | 69 | 7 | 0 | 12.9 | 6.3 |
| May | 24° / 13° | 77 | 7.1 | 0 | 13.9 | 7.3 |
| Jun | 28° / 18° | 117 | 7.9 | 0 | 14.5 | 6.5 |
| Jul | 29° / 22° | 246 | 15.5 | 0 | 14.3 | 4.6 |
| Aug | 30° / 23° | 235 | 15 | 0 | 13.4 | 4.6 |
| Sep | 26° / 17° | 135 | 7.9 | 0 | 12.2 | 7.0 |
| Oct | 20° / 10° | 56 | 5.2 | 0 | 11.1 | 7.2 |
| Nov | 12° / 4° | 46 | 6.7 | 0.4 | 10 | 3.8 |
| Dec | 5° / -3° | 23 | 5.1 | 2.6 | 9.5 | 0.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 30% of the time across winter.
Chance of precipitation in Winter
Yesan gets around 72 mm of rain and snow over 14 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 42 min in early December to 11 h 06 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.8 kWh/m².
Hazard calendar for Yesan
In winter, Yesan overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yesan sits in the Pacific typhoon belt; the season peaks July–October.
Yesan's rainy season runs June–September, when most of the year's rain falls.
Is winter a good time to visit Yesan?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Yesan.
What to pack for Yesan in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Yesan sees daytime highs around 5°C and nights near -3°C. Pack a warm layer and a heavy coat. About 14 days see rain.
Sea temperature near Yesan in Winter
The nearest coast averages about 8°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 42 km away) is warmest in August at about 25°C and coldest in February near 5°C.
It's comfortable for a long swim from Jul 4 to Oct 7 — about 3.2 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 7 | 5 | 6 | 8 | 12 | 18 | 22 | 25 | 23 | 19 | 15 | 11 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 7 | Bracing |
| Feb | 5 | Bracing |
| Mar | 6 | Bracing |
| Apr | 8 | Bracing |
| May | 12 | Bracing |
| Jun | 18 | Cool |
| Jul | 22 | Refreshing |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 15 | Cool |
| Dec | 11 | Bracing |
UV index in Yesan in Winter
Clear-sky midday UV across winter averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Yesan peaks around July 24 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 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 6 | 7 | 8 | 8 | 7 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | High | Very high | Very high | Very high | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | Very high |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Yesan in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Yesan is worst in March — around 92 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (July, 46 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 83 | 85 | 92 | 75 | 62 | 57 | 46 | 47 | 61 | 74 | 79 | 73 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 83 | Unhealthy |
| Feb | 85 | Unhealthy |
| Mar | 92 | Unhealthy |
| Apr | 75 | Unhealthy |
| May | 62 | Unhealthy |
| Jun | 57 | Unhealthy |
| Jul | 46 | Poor |
| Aug | 47 | Poor |
| Sep | 61 | Unhealthy |
| Oct | 74 | Unhealthy |
| Nov | 79 | Unhealthy |
| Dec | 73 | Unhealthy |
Where is Yesan?
Yesan sits at 36.7°N, 126.8°E, 23 m above sea level, in South Korea. The nearest listed city is Hongseong, 18 km away.
Topography around Yesan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yesan.
Within 3 km, the terrain around Yesan has significant variations in elevation — a maximum elevation change of 402 m around an average of 84 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 615 m; within 80 km, large variations in elevation — a maximum elevation change of 882 m.
The land around Yesan is covered by trees (57%) within 3 km, trees (49%) and cropland (36%) within 16 km, and trees (41%), water (27%) and cropland (21%) within 80 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
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 Yesan (36.6776°, 126.8427°, elevation 23 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.