Kosong weather in May

In May, Kosong sees average daytime highs of 19°C and overnight lows near 13°C, with 85 mm of rain across 7.7 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 39% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 24 min by month's end. Set against the rest of the year, May is Kosong's 8th-clearest and 7th-windiest month. For the whole year in context, see Kosong's year-round climate.

Daytime high
19°
5th warmest
Overnight low
13°
8th coldest
Rainfall
85 mm
7.7 wet days
Daylight
14 h 06 min
5:20 AM – 7:25 PM
Cloud cover
54%
8th clearest
Wind
12 km/h
7th windiest
Solar energy
5.88 kWh/m²
Travel score
6.6
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 21°C by the end.

A typical May day in Kosong reaches about 19°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
11710
21710
31811
41811
51811
61811
71811
81811
91812
101812
111912
121912
131912
141912
151912
161913
171913
182013
192013
202013
212013
222014
232014
242014
252114
262114
272114
282115
292115
302115
312115

How May really feels in Kosong

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.

Kosong weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°486.559.60.0
Feb / -3°425.84.210.50.1
Mar / 537.63.211.71.9
Apr15° / 667.70.3134.7
May19° / 13°857.7014.16.6
Jun23° / 17°979.6014.66.7
Jul26° / 21°20613.7014.46.0
Aug26° / 22°21914.9013.55.8
Sep23° / 18°15910.7012.36.6
Oct18° / 12°807.10116.4
Nov12° / 748.20.79.93.2
Dec / -1°445.52.99.40.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25248
35248
45149
55149
65050
75050
85050
95050
105050
115050
125149
135149
145149
155248
165248
175347
185347
195446
205347
215347
225347
235347
245446
255347
265347
275347
285347
295248
305248
315149

Chance of precipitation in May

Any precipitation

Kosong gets around 85 mm of rain over 7.7 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 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
124
224
325
425
525
625
726
826
926
1027
1127
1227
1327
1427
1527
1627
1726
1826
1926
2025
2125
2225
2324
2424
2523
2623
2723
2822
2922
3022
3122

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19640
29640
39550
49550
59550
69460
79460
89370
99370
109280
119190
129190
1390100
1488111
1587121
1686131
1784151
1883161
1981181
2079192
2177212
2275232
2372253
2470273
2567294
2665314
2761345
2858366
2955387
3051409
31474210

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:36 AM to 5:10 AM, and sunset from 7:11 PM to 7:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:367:11
213.65:357:12
313.65:347:13
413.75:327:13
513.75:317:14
613.85:307:15
713.85:297:16
813.85:287:17
913.95:277:18
1013.95:267:19
1113.95:257:20
1214.05:247:21
1314.05:237:22
1414.05:227:23
1514.05:217:24
1614.15:207:25
1714.15:197:26
1814.15:187:26
1914.25:187:27
2014.25:177:28
2114.25:167:29
2214.25:157:30
2314.35:157:31
2414.35:147:32
2514.35:137:32
2614.35:137:33
2714.45:127:34
2814.45:127:35
2914.45:117:36
3014.45:107:36
3114.45:107:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.88 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.88 kWh/m² in May across the year — May's 5.88 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.9Bright
185.9Bright
195.9Bright
206.0Bright
216.0Bright
226.0Intense
236.0Intense
246.0Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in May

Hazard calendar for Kosong

In seasonPeak

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

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

Kosong's rainy season runs July–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 Kosong?

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

6.6
Sightseeing
2nd-best month of the year
3.0
Beach & pool
5th-best month of the year

May is a reasonable time to visit Kosong for sightseeing.

What to pack for Kosong in May

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

In May, Kosong sees daytime highs around 19°C and nights near 13°C. Worth packing: sun protection. About 8 days see rain.

sun protection

Sea temperature near Kosong in May

The nearest coast averages about 14°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 14 km away) is warmest in August at about 24°C and coldest in February near 8°C.

It's comfortable for a long swim from Jul 1 to Oct 3 — about 3.1 months when the water holds above 20°C.

10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr11Bracing
May14Bracing
Jun18Cool
Jul22Refreshing
Aug24Warm
Sep22Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index in Kosong in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks 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 Kosong peaks around August 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateLowAug 17UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul7Very high
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Kosong 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 Kosong is worst in March — around 46 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (September, 19 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 2046 µg/m³Sep 1120 µg/m³
PM2.5 (µg/m³)Level
Jan35Poor
Feb38Poor
Mar46Poor
Apr43Poor
May36Poor
Jun29Moderate
Jul23Moderate
Aug21Moderate
Sep19Moderate
Oct26Moderate
Nov31Moderate
Dec30Moderate
Location & terrain

Where is Kosong?

Kosong sits at 38.4°N, 128.5°E, 17 m above sea level, in South Korea. The nearest listed city is Sokcho, 22 km away.

YangguJumunjinHwacheonGangneungHoeyangChuncheon

Topography around Kosong

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

Within 3 km, the terrain around Kosong has significant variations in elevation — a maximum elevation change of 294 m around an average of 40 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,313 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,646 m.

The land around Kosong is covered by trees (51%) and cropland (23%) within 3 km, trees (50%) and water (41%) within 16 km, and trees (58%) and water (33%) within 80 km.

3 km
294 m
16 km
1,313 m
80 km
1,646 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Sokcho 22 km · Yanggu 52 km · Jumunjin 63 km · Hwacheon 73 km · Gangneung 78 km · T’ongch’ŏn-ŭp 81 km · Hoeyang 84 km · Chuncheon 85 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 Kosong (38.3788°, 128.4676°, elevation 17 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).