Busan weather in April

In April, Busan sees average daytime highs of 15°C and overnight lows near 12°C, with 121 mm of rain across 8.1 wet days and about 12.9 hours of daylight. It is the 8th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 16°C by the end. The sky is clear or mostly clear about 41% 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 Busan's 7th-clearest and 6th-windiest month. For the whole year in context, see Busan's year-round climate.

Daytime high
15°
8th warmest
Overnight low
12°
6th coldest
Rainfall
121 mm
8.1 wet days
Daylight
12 h 54 min
5:58 AM – 6:51 PM
Cloud cover
53%
7th clearest
Wind
21 km/h
6th windiest
Solar energy
5.49 kWh/m²
Travel score
4.7
out of 10

Busan is metropolitan city of South Korea.

Air quality
Elevated
PM2.5 17 µg/m³ · 2020
Density
4,267/km²
people per km²

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 13°C in the first days to 16°C by the end.

A typical April day in Busan reaches about 15°C in the afternoon and slips back to 12°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 17°C. Set against its neighbours, April runs about 3°C warmer than March and about 3°C cooler than May.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
11310
21310
31310
41410
51410
61411
71411
81411
91411
101411
111411
121411
131511
141512
151512
161512
171512
181512
191512
201512
211513
221513
231613
241613
251613
261613
271613
281614
291614
301614

How April really feels in Busan

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.

Busan weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 374.79.91.4
Feb / 475.110.72.0
Mar12° / 897.911.73.2
Apr15° / 12°1218.112.94.7
May18° / 16°1307.613.86.1
Jun21° / 19°1679.314.36.4
Jul25° / 23°22811.814.16.4
Aug27° / 25°18111.113.36.5
Sep24° / 22°1598.812.27.0
Oct20° / 17°724.511.17.4
Nov15° / 11°525.410.25.3
Dec10° / 334.19.72.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35347
45347
55347
65347
75347
85446
95446
105347
115347
125347
135347
145248
155347
165347
175446
185446
195545
205545
215446
225446
235446
245446
255446
265446
275446
285347
295347
305347

Chance of precipitation in April

Any precipitation

Busan gets around 121 mm of rain over 8.1 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 27% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
326
426
526
626
726
826
926
1026
1126
1226
1327
1427
1527
1627
1727
1827
1927
2027
2128
2228
2328
2428
2528
2627
2727
2827
2926
3026

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 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19730
29730
39730
49730
59640
69640
79640
89550
99550
109460
119460
129370
139280
149181
159091
1689101
1788111
1887121
1986131
2085141
2183161
2282171
2380191
2477212
2575232
2673252
2770273
2868293
2966313
3064324

Wind in April

Winds average 21 km/h in April.

Across April, daily wind ranges from about 21 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
122breezy
222breezy
322breezy
422breezy
522breezy
622breezy
722breezy
822breezy
922breezy
1022breezy
1122breezy
1222breezy
1322breezy
1422breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy

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 6:19 AM to 5:40 AM, and sunset from 6:38 PM to 7:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:196:38
212.46:176:39
312.46:166:40
412.46:146:41
512.56:136:42
612.56:116:42
712.66:106:43
812.66:096:44
912.66:076:45
1012.76:066:46
1112.76:046:47
1212.76:036:47
1312.86:026:48
1412.86:006:49
1512.85:596:50
1612.95:586:51
1712.95:566:51
1813.05:556:52
1913.05:546:53
2013.05:526:54
2113.15:516:55
2213.15:506:56
2313.15:496:56
2413.25:476:57
2513.25:466:58
2613.25:456:59
2713.35:447:00
2813.35:437:00
2913.35:417:01
3013.45:407:02

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.49 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 5.88 kWh/m² in May across the year — April's 5.49 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in April

Hazard calendar for Busan

In seasonPeak

In April, Busan sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

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

Busan's rainy season runs April–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 Busan?

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

4.7
Sightseeing
8th-best month of the year
0.2
Beach & pool
8th-best month of the year

April is a reasonable time to visit Busan for sightseeing.

What to pack for Busan in April

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

In April, Busan sees daytime highs around 15°C and nights near 12°C. Worth packing: a warm layer, rain gear, sun protection and a windbreaker. About 8 days see rain.

a warm layerrain gearsun protectiona windbreaker

Sea temperature near Busan in April

The nearest coast averages about 15°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 17 to Nov 7 — about 4.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Bracing
May17Cool
Jun20Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Busan 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 Busan peaks around August 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highModerateAug 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep9Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Busan 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 Busan is worst in March — around 21 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (August, 13 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Busan's WHO annual average of 17 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2121 µg/m³Aug 1913 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb18Moderate
Mar21Moderate
Apr21Moderate
May20Moderate
Jun17Moderate
Jul14Moderate
Aug13Moderate
Sep14Moderate
Oct16Moderate
Nov18Moderate
Dec15Moderate
Location & terrain

Where is Busan?

Busan sits at 35.1°N, 129.0°E, 15 m above sea level, in South Korea. The nearest listed city is Kimhae, 20 km away.

ChangwonUngsangGeojeSinhyeonKyosai

Topography around Busan

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

Within 3 km, the terrain around Busan has significant variations in elevation — a maximum elevation change of 485 m around an average of 75 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 636 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,204 m.

The land around Busan is covered by artificial surfaces (50%), trees (26%) and water (21%) within 3 km, water (51%) and artificial surfaces (24%) within 16 km, and water (53%) and trees (36%) within 80 km.

3 km
485 m
16 km
636 m
80 km
1,204 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Kimhae 20 km · Gijang 23 km · Yangsan 27 km · Changwon 35 km · Ungsang 36 km · Geoje 44 km · Sinhyeon 44 km · Kyosai 49 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 Busan (35.1017°, 129.03°, elevation 15 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).