Donghae City weather in May

In May, Donghae City sees average daytime highs of 21°C and overnight lows near 12°C, with 75 mm of rain across 7.8 wet days and about 14 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 22°C by the end. The sky is clear or mostly clear about 37% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 24 min by month's end. Set against the rest of the year, May is Donghae City's 8th-clearest and 7th-windiest month. For the whole year in context, see Donghae City's year-round climate.

Daytime high
21°
5th warmest
Overnight low
12°
8th coldest
Rainfall
75 mm
7.8 wet days
Daylight
14 hours
5:19 AM – 7:20 PM
Cloud cover
56%
8th clearest
Wind
9 km/h
7th windiest
Solar energy
5.97 kWh/m²
Travel score
6.7
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 22°C by the end.

A typical May day in Donghae City reaches about 21°C in the afternoon and slips back to 12°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 26°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)
1199
2199
31910
41910
51910
61910
71910
82010
92011
102011
112011
122011
132011
142011
152011
162112
172112
182112
192112
202112
212112
222113
232213
242213
252213
262213
272213
282213
292214
302214
312214

How May really feels in Donghae City

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.

Donghae City weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -6°455.859.70.0
Feb / -5°445.74.610.60.1
Mar / 688.64.811.72.0
Apr16° / 758.40.812.95.1
May21° / 12°757.80146.7
Jun23° / 16°1079.6014.56.8
Jul26° / 20°19713.4014.35.9
Aug26° / 21°21515.4013.45.7
Sep22° / 16°18511.6012.36.3
Oct18° / 8280116.1
Nov11° / 617.30.7103.1
Dec / -3°3552.79.50.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25347
35149
45149
55050
65050
74951
84951
94852
104852
114951
124951
134951
145050
155050
165050
175050
185050
195149
205149
215149
225248
235248
245248
255149
265149
275149
285149
295050
305050
315050

Chance of precipitation in May

Any precipitation

Donghae City gets around 75 mm of rain over 7.8 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 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
326
426
526
626
727
827
927
1027
1128
1228
1328
1428
1528
1627
1727
1827
1927
2026
2126
2226
2325
2425
2524
2624
2724
2823
2923
3023
3123

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 87% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19631
29541
39541
49541
59451
69451
79451
89361
99460
109460
119460
129370
139370
149280
159280
169190
1790100
1888111
1987121
2086131
2185141
2284151
2382162
2481172
2579192
2677203
2775223
2872244
2969265
3068275
3165296

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 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 54 minutes over May. Sunrise moves from 5:35 AM to 5:10 AM, and sunset from 7:07 PM to 7:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:357:07
213.65:347:08
313.65:337:08
413.65:317:09
513.75:307:10
613.75:297:11
713.75:287:12
813.85:277:13
913.85:267:14
1013.85:257:15
1113.95:247:16
1213.95:237:17
1313.95:227:18
1414.05:217:18
1514.05:207:19
1614.05:197:20
1714.05:197:21
1814.15:187:22
1914.15:177:23
2014.15:167:24
2114.15:157:24
2214.25:157:25
2314.25:147:26
2414.25:137:27
2514.25:137:28
2614.35:127:28
2714.35:127:29
2814.35:117:30
2914.35:117:31
3014.45:107:31
3114.45:107:32

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.97 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 5.97 kWh/m² in May across the year — May's 5.97 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
176.0Bright
186.0Bright
196.0Intense
206.0Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in May

Hazard calendar for Donghae City

In seasonPeak

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

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

Donghae City'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 May a good time to visit Donghae City?

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

6.7
Sightseeing
2nd-best month of the year
3.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Donghae City for sightseeing.

What to pack for Donghae City in May

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

In May, Donghae City sees daytime highs around 21°C and nights near 12°C. Worth packing: sun protection. About 8 days see rain.

sun protection

Sea temperature near Donghae City in May

The nearest coast averages about 15°C in May — 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 24°C and coldest in February near 10°C.

It's comfortable for a long swim from Jul 1 to Oct 11 — about 3.4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar10Bracing
Apr12Bracing
May15Bracing
Jun18Cool
Jul22Refreshing
Aug24Warm
Sep22Refreshing
Oct20Cool
Nov16Cool
Dec14Bracing

UV index in Donghae City in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Donghae City peaks around August 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 16UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun7High
Jul8Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Donghae City 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 Donghae City is worst in March — around 40 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (September, 17 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 2239 µg/m³Sep 1817 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb30Moderate
Mar40Poor
Apr38Poor
May35Moderate
Jun30Moderate
Jul24Moderate
Aug21Moderate
Sep17Moderate
Oct20Moderate
Nov24Moderate
Dec22Moderate
Location & terrain

Where is Donghae City?

Donghae City sits at 37.5°N, 129.1°E, 24 m above sea level, in South Korea. The nearest listed city is Santyoku, 13 km away.

T’aebaekJumunjinPyeongchangNeietsuSokchoYeongju

Topography around Donghae City

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

Within 3 km, the terrain around Donghae City has significant variations in elevation — a maximum elevation change of 358 m around an average of 72 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,347 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,550 m.

The land around Donghae City is covered by trees (47%) and water (30%) within 3 km, water (47%) and trees (44%) within 16 km, and trees (62%) and water (33%) within 80 km.

3 km
358 m
16 km
1,347 m
80 km
1,550 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Santyoku 13 km · Gangneung 31 km · T’aebaek 42 km · Jumunjin 46 km · Pyeongchang 66 km · Neietsu 69 km · Sokcho 86 km · Yeongju 91 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 Donghae City (37.5439°, 129.1069°, elevation 24 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).