Yŏnmu weather in May

In May, Yŏnmu sees average daytime highs of 24°C and overnight lows near 13°C, with 87 mm of rain across 7.4 wet days and about 13.9 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 26°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 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Yŏnmu's 5th-clearest and 4th-windiest month. For the whole year in context, see Yŏnmu's year-round climate.

Daytime high
24°
5th warmest
Overnight low
13°
8th coldest
Rainfall
87 mm
7.4 wet days
Daylight
13 h 54 min
5:31 AM – 7:25 PM
Cloud cover
54%
5th clearest
Wind
9 km/h
4th windiest
Solar energy
5.9 kWh/m²
Travel score
7.2
out of 10

Yŏnmu is human settlement in South Korea.

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 22°C in the first days to 26°C by the end.

A typical May day in Yŏnmu reaches about 24°C in the afternoon and slips back to 13°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 29°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12210
22210
32210
42211
52311
62311
72311
82311
92312
102312
112312
122312
132412
142412
152413
162413
172413
182413
192513
202513
212514
222514
232514
242514
252614
262614
272615
282615
292615
302615
312715

How May really feels in Yŏnmu

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.

Yŏnmu 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°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 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 12% of May, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25248
35248
45248
55248
65149
75149
85050
95050
104951
114951
124951
135050
145050
155050
165050
175050
185149
195149
205149
215248
225248
235248
245347
255347
265347
275248
285248
295248
305149
315149

Chance of precipitation in May

Any precipitation

Yŏnmu gets around 87 mm of rain over 7.4 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 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
227
327
427
527
627
727
827
927
1027
1127
1227
1326
1426
1526
1626
1725
1825
1924
2024
2124
2223
2323
2422
2522
2622
2722
2821
2921
3021
3121

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 70% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1861130
2851131
3841231
4841231
5821341
6821341
7811441
8811441
9801541
10801541
11791641
12781741
13771751
14761851
15751951
16742051
17712261
18702361
19692461
20672571
21652771
22632881
23622981
24603091
25593191
265633101
275434111
285135131
294935142
304636162
314337182

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
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 18 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 5:45 AM to 5:21 AM, and sunset from 7:12 PM to 7:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:457:12
213.55:447:13
313.55:437:14
413.65:427:15
513.65:417:16
613.65:407:17
713.65:397:18
813.75:387:18
913.75:377:19
1013.75:367:20
1113.85:357:21
1213.85:347:22
1313.85:337:23
1413.95:327:23
1513.95:317:24
1613.95:317:25
1713.95:307:26
1814.05:297:27
1914.05:287:28
2014.05:287:28
2114.05:277:29
2214.15:267:30
2314.15:267:31
2414.15:257:32
2514.15:247:32
2614.25:247:33
2714.25:237:34
2814.25:237:34
2914.25:227:35
3014.25:227:36
3114.35:217:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.9 kWh/m² — the sunniest month for solar.

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 — May's 5.9 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
115.8Bright
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 Yŏnmu

In seasonPeak

In May, 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 May a good time to visit Yŏnmu?

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

7.2
Sightseeing
2nd-best month of the year
6.1
Beach & pool
3rd-best month of the year

May is one of the better times to visit Yŏnmu for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Yŏnmu in May

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

In May, Yŏnmu sees daytime highs around 24°C and nights near 13°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Yŏnmu 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 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — 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 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 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
May 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).