Yŏnmu in Spring
In spring (March, April and May), Yŏnmu sees average daytime highs around 18°C and overnight lows near 7°C, with 219 mm of precipitation over about 22 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 10°C in early March to 26°C by late May. The sky is clear or mostly clear about 41% of the time across spring, and the air most often feels dry.
Spring is Yŏnmu's 2nd-best season to visit on our travel score. For the whole year in context, see Yŏnmu's year-round climate.
- Avg daytime high
- 18°C
- 3rd-warmest season
- Avg overnight low
- 7°C
- Precipitation
- 219 mm
- 22 wet days
- Avg wind
- 10 km/h
- Travel score
- 5.7
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Yŏnmu in Spring
Over the season highs climb from about 10°C in early March to 26°C by late May.
A typical spring day in Yŏnmu reaches about 18°C and drops to 7°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Yŏnmu
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 25 that feel at or below 0°C.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Yŏnmu weather by month
How the three spring months (March, April and May) 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 | 4° / -4° | 22 | 4.3 | 2.1 | 9.8 | 0.0 |
| Feb | 7° / -3° | 32 | 4.2 | 1.4 | 10.6 | 0.8 |
| Mar | 12° / 1° | 49 | 6.9 | 1 | 11.7 | 3.6 |
| Apr | 19° / 7° | 83 | 7.2 | 0 | 12.9 | 6.4 |
| May | 24° / 13° | 87 | 7.4 | 0 | 13.9 | 7.2 |
| Jun | 28° / 18° | 130 | 8.8 | 0 | 14.4 | 6.2 |
| Jul | 29° / 22° | 272 | 16.2 | 0 | 14.2 | 4.4 |
| Aug | 30° / 23° | 240 | 15.1 | 0 | 13.4 | 4.4 |
| Sep | 26° / 17° | 149 | 8.8 | 0 | 12.2 | 6.8 |
| Oct | 21° / 10° | 59 | 4.9 | 0 | 11.1 | 7.4 |
| Nov | 13° / 3° | 43 | 6.2 | 0.1 | 10.1 | 4.2 |
| Dec | 6° / -3° | 24 | 4.6 | 1.4 | 9.6 | 0.6 |
Cloud cover in Spring
The sky is clear or mostly clear about 41% of the time across spring.
Chance of precipitation in Spring
Yŏnmu gets around 219 mm of rain and snow over 22 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 10 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 06 min in early March to 14 h 18 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.4 kWh/m².
Hazard calendar for Yŏnmu
In spring, Yŏnmu overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yŏnmu sits in the Pacific typhoon belt; the season peaks July–October.
Yŏnmu's rainy season runs June–September, when most of the year's rain falls.
Is spring a good time to visit Yŏnmu?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Yŏnmu for sightseeing.
What to pack for Yŏnmu in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Yŏnmu sees daytime highs around 18°C and nights near 7°C. Worth packing: light clothes, a warm layer and sun protection. About 22 days see rain.
Sea temperature near Yŏnmu in Spring
The nearest coast averages about 10°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 43 km away) is warmest in August at about 26°C and coldest in February near 5°C.
It's comfortable for a long swim from Jun 26 to Oct 10 — about 3.5 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 | 9 | 14 | 19 | 23 | 26 | 23 | 19 | 15 | 11 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 7 | Bracing |
| Feb | 5 | Bracing |
| Mar | 6 | Bracing |
| Apr | 9 | Bracing |
| May | 14 | Bracing |
| Jun | 19 | Cool |
| Jul | 23 | Refreshing |
| Aug | 26 | Warm |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 15 | Bracing |
| Dec | 11 | Bracing |
UV index in Yŏnmu in Spring
Clear-sky midday UV across spring averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Yŏnmu 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 7 | 8 | 7 | 8 | 8 | 8 | 5 | 3 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 7 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 8 | Very high |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Yŏnmu in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Yŏnmu is worst in March — around 64 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (July, 32 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) | 52 | 56 | 64 | 55 | 46 | 42 | 32 | 35 | 43 | 48 | 51 | 48 |
| Level | Poor | Unhealthy | Unhealthy | Poor | Poor | Poor | Moderate | Moderate | Poor | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 52 | Poor |
| Feb | 56 | Unhealthy |
| Mar | 64 | Unhealthy |
| Apr | 55 | Poor |
| May | 46 | Poor |
| Jun | 42 | Poor |
| Jul | 32 | Moderate |
| Aug | 35 | Moderate |
| Sep | 43 | Poor |
| Oct | 48 | Poor |
| Nov | 51 | Poor |
| Dec | 48 | Poor |
Where is Yŏnmu?
Yŏnmu sits at 36.1°N, 127.1°E, 35 m above sea level, in South Korea. The nearest listed city is Nonsan, 8.0 km away.
Topography around Yŏnmu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yŏnmu.
Within 3 km, the terrain around Yŏnmu has only modest variations in elevation — a maximum elevation change of 142 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 557 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,594 m.
The land around Yŏnmu is covered by cropland (51%) and artificial surfaces (25%) within 3 km, trees (41%) and cropland (39%) within 16 km, and trees (57%) 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 Yŏnmu (36.1294°, 127.1°, elevation 35 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.