Yeosu weather in May

In May, Yeosu sees average daytime highs of 18°C and overnight lows near 16°C, with 147 mm of rain across 8.4 wet days and about 13.8 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 20°C by the end. The sky is clear or mostly clear about 36% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Yeosu's 9th-clearest and 10th-windiest month. For the whole year in context, see Yeosu's year-round climate.

Daytime high
18°
6th warmest
Overnight low
16°
7th coldest
Rainfall
147 mm
8.4 wet days
Daylight
13 h 48 min
5:31 AM – 7:20 PM
Cloud cover
57%
9th clearest
Wind
15 km/h
10th windiest
Solar energy
5.79 kWh/m²
Travel score
6.2
out of 10

Yeosu is city in South Korea.

Density
534/km²
people per km²
Founded
~940 CE

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 20°C by the end.

A typical May day in Yeosu reaches about 18°C in the afternoon and slips back to 16°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 20°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11714
21714
31714
41714
51714
61714
71714
81715
91815
101815
111815
121815
131815
141815
151815
161816
171916
181916
191916
201916
211916
221916
231917
241917
252017
262017
272017
282017
292017
302018
312018

How May really feels in Yeosu

Once humidity and wind are folded in, May 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

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

Yeosu weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 344.39.90.6
Feb / 484.810.71.3
Mar11° / 927.411.72.8
Apr15° / 11°1348.512.84.5
May18° / 16°1478.413.86.2
Jun22° / 20°1949.414.36.4
Jul25° / 23°26813.614.16.1
Aug27° / 25°22412.613.36.2
Sep24° / 21°1608.912.27.0
Oct20° / 16°714.711.17.3
Nov14° / 10°505.410.24.7
Dec / 313.99.71.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35050
45050
54951
64951
74852
84852
94753
104753
114753
124753
134753
144654
154654
164654
174654
184654
194654
204654
214654
224753
234852
244852
254852
264852
274951
284951
294951
304951
314951

Chance of precipitation in May

Any precipitation

Yeosu gets around 147 mm of rain over 8.4 wet days in May. 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 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
531
631
731
830
930
1030
1130
1230
1330
1429
1529
1628
1728
1827
1927
2026
2126
2225
2325
2424
2524
2623
2723
2823
2922
3022
3122

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1673030
2653140
3633340
4623440
5593650
6573760
7563860
8543970
9524080
10504190
114842100
124643110
134444110
144245130
153946141
163747151
173448171
183249181
193049201
202750221
212550241
222351251
232151271
241950292
251849322
261648342
271446373
281345393
291243424
301041445
31938476

Wind in May

Winds average 15 km/h in May.

Across May, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:45 AM to 5:23 AM, and sunset from 7:08 PM to 7:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:457:08
213.45:447:09
313.45:437:10
413.55:427:10
513.55:417:11
613.55:407:12
713.65:397:13
813.65:387:14
913.65:377:14
1013.75:367:15
1113.75:357:16
1213.75:347:17
1313.75:347:18
1413.85:337:18
1513.85:327:19
1613.85:317:20
1713.85:307:21
1813.95:307:22
1913.95:297:22
2013.95:287:23
2113.95:287:24
2214.05:277:25
2314.05:267:25
2414.05:267:26
2514.05:257:27
2614.05:257:27
2714.15:247:28
2814.15:247:29
2914.15:237:30
3014.15:237:30
3114.15:237:31

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.79 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.65 kWh/m² to a high of 5.79 kWh/m² in May across the year — May's 5.79 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
316.0Bright
Planning a trip in May

Hazard calendar for Yeosu

In seasonPeak

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

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

Yeosu'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 May a good time to visit Yeosu?

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

6.2
Sightseeing
4th-best month of the year
2.3
Beach & pool
6th-best month of the year

May is a reasonable time to visit Yeosu for sightseeing.

What to pack for Yeosu in May

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

In May, Yeosu sees daytime highs around 18°C and nights near 16°C. Worth packing: rain gear and sun protection. About 8 days see rain.

rain gearsun protection

Sea temperature near Yeosu in May

The nearest coast averages about 16°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in August at about 26°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 20 to Oct 22 — about 4.1 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr13Bracing
May16Cool
Jun20Cool
Jul23Refreshing
Aug26Warm
Sep24Warm
Oct21Refreshing
Nov17Cool
Dec14Bracing

UV index in Yeosu in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yeosu peaks around August 20 at about 9 (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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 20UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep9Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Yeosu in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Yeosu is worst in March — around 42 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (July, 18 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1841 µg/m³Jul 2318 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb35Poor
Mar42Poor
Apr37Poor
May31Moderate
Jun25Moderate
Jul18Moderate
Aug18Moderate
Sep22Moderate
Oct24Moderate
Nov27Moderate
Dec26Moderate
Location & terrain

Where is Yeosu?

Yeosu sits at 34.8°N, 127.7°E, 10 m above sea level, in South Korea. The nearest listed city is Gwangyang, 20 km away.

HadongKuryeBoseongChinju

Topography around Yeosu

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

Within 3 km, the terrain around Yeosu has significant variations in elevation — a maximum elevation change of 327 m around an average of 63 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 502 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,875 m.

The land around Yeosu is covered by trees (40%) and artificial surfaces (30%) within 3 km, water (52%) and trees (30%) within 16 km, and water (46%) and trees (44%) within 80 km.

3 km
327 m
16 km
502 m
80 km
1,875 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Gwangyang 20 km · Kwangyang 25 km · Suncheon 26 km · Beolgyo 31 km · Hadong 35 km · Kurye 53 km · Boseong 53 km · Chinju 62 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 Yeosu (34.7606°, 127.6621°, elevation 10 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).