Yŏnmu weather in April

In April, Yŏnmu sees average daytime highs of 19°C and overnight lows near 7°C, with 83 mm of rain across 7.2 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 21°C by the end. The sky is clear or mostly clear about 42% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 24 min by month's end. Set against the rest of the year, April is Yŏnmu's 4th-clearest and 2nd-windiest month. For the whole year in context, see Yŏnmu's year-round climate.

Daytime high
19°
7th warmest
Overnight low
6th coldest
Rainfall
83 mm
7.2 wet days
Daylight
12 h 54 min
6:04 AM – 6:59 PM
Cloud cover
52%
4th clearest
Wind
10 km/h
2nd windiest
Solar energy
5.54 kWh/m²
Travel score
6.4
out of 10

Yŏnmu is human settlement in South Korea.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 21°C by the end.

A typical April day in Yŏnmu reaches about 19°C in the afternoon and slips back to 7°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 24°C. Set against its neighbours, April runs about 7°C warmer than March and about 5°C cooler than May.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1164
2164
3164
4165
5175
6175
7175
8175
9186
10186
11186
12186
13186
14197
15197
16197
17197
18197
19208
20208
21208
22208
23208
24219
25219
26219
27219
28219
292210
302210

How April really feels in Yŏnmu

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 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
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Yŏnmu weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°224.32.19.80.0
Feb / -3°324.21.410.60.8
Mar12° / 496.9111.73.6
Apr19° / 837.2012.96.4
May24° / 13°877.4013.97.2
Jun28° / 18°1308.8014.46.2
Jul29° / 22°27216.2014.24.4
Aug30° / 23°24015.1013.44.4
Sep26° / 17°1498.8012.26.8
Oct21° / 10°594.9011.17.4
Nov13° / 436.20.110.14.2
Dec / -3°244.61.49.60.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25743
35743
45743
55743
65842
75842
85842
95842
105842
115842
125743
135743
145743
155644
165545
175545
185545
195545
205545
215545
225545
235446
245545
255545
265446
275446
285446
295446
305347

Chance of precipitation in April

Any precipitation

Yŏnmu gets around 83 mm of rain over 7.2 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 27% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
321
421
521
621
722
822
922
1022
1122
1223
1323
1423
1524
1624
1724
1824
1925
2025
2125
2226
2326
2426
2527
2627
2727
2827
2927
3027

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
59910
69910
79910
89910
99910
109910
119910
129820
139820
149820
159730
169730
179730
189730
199640
209541
219541
229451
239361
249361
259172
269082
279082
288992
2987103
3087103

Wind in April

Winds average 10 km/h in April.

Across April, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 6:26 AM to 5:46 AM, and sunset from 6:47 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:266:47
212.46:246:47
312.46:236:48
412.56:226:49
512.56:206:50
612.56:196:51
712.66:176:52
812.66:166:52
912.76:146:53
1012.76:136:54
1112.76:116:55
1212.86:106:56
1312.86:086:57
1412.86:076:58
1512.96:066:58
1612.96:046:59
1713.06:037:00
1813.06:027:01
1913.06:007:02
2013.15:597:03
2113.15:587:04
2213.15:567:05
2313.25:557:05
2413.25:547:06
2513.25:527:07
2613.35:517:08
2713.35:507:09
2813.35:497:10
2913.45:487:11
3013.45:467:11

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.54 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 5.9 kWh/m² in May across the year — April's 5.54 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in April

Hazard calendar for Yŏnmu

In seasonPeak

In April, Yŏnmu sits inside 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.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Yŏnmu?

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

6.4
Sightseeing
4th-best month of the year
2.7
Beach & pool
7th-best month of the year

April is a reasonable time to visit Yŏnmu for sightseeing.

What to pack for Yŏnmu in April

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

In April, Yŏnmu sees daytime highs around 19°C and nights near 7°C. Worth packing: a warm layer and sun protection. About 7 days see rain.

a warm layersun protection

Sea temperature near Yŏnmu in April

The nearest coast averages about 9°C in April — 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.

0°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb5Bracing
Mar6Bracing
Apr9Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep23Refreshing
Oct19Cool
Nov15Bracing
Dec11Bracing

UV index in Yŏnmu in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — 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.

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 Yŏnmu in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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).

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorMar 1663 µg/m³Jul 2133 µg/m³
PM2.5 (µg/m³)Level
Jan52Poor
Feb56Unhealthy
Mar64Unhealthy
Apr55Poor
May46Poor
Jun42Poor
Jul32Moderate
Aug35Moderate
Sep43Poor
Oct48Poor
Nov51Poor
Dec48Poor
Location & terrain

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.

JeonjuKinzanDaejeon

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.

3 km
142 m
16 km
557 m
80 km
1,594 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Nonsan 8.0 km · Namsa 22 km · Buyeo 24 km · Iksan 24 km · Wanju 32 km · Jeonju 34 km · Kinzan 35 km · Daejeon 35 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 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. 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).