Hwasun weather in May

In May, Hwasun sees average daytime highs of 23°C and overnight lows near 12°C, with 106 mm of rain across 8.4 wet days and about 13.8 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 25°C by the end. The sky is clear or mostly clear about 34% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 12 min by month's end. Set against the rest of the year, May is Hwasun's 6th-clearest and 6th-windiest month. For the whole year in context, see Hwasun's year-round climate.

Daytime high
23°
5th warmest
Overnight low
12°
8th coldest
Rainfall
106 mm
8.4 wet days
Daylight
13 h 48 min
5:33 AM – 7:23 PM
Cloud cover
59%
6th clearest
Wind
9 km/h
6th windiest
Solar energy
5.76 kWh/m²
Travel score
7.1
out of 10

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 25°C by the end.

A typical May day in Hwasun reaches about 23°C in the afternoon and slips back to 12°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 27°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12110
22110
32210
42210
52210
62211
72211
82211
92211
102311
112311
122312
132312
142312
152312
162312
172312
182412
192412
202413
212413
222413
232413
242513
252513
262514
272514
282514
292514
302514
312614

How May really feels in Hwasun

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.

Hwasun 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 / -3°284.61.99.90.1
Feb / -2°375.31.110.71.3
Mar13° / 707.60.811.73.8
Apr19° / 948.1012.96.3
May23° / 12°1068.4013.87.1
Jun27° / 17°16810.4014.36.2
Jul29° / 22°26617.2014.14.5
Aug30° / 22°24716.3013.34.4
Sep26° / 17°1429.8012.26.6
Oct21° / 10°574.7011.17.5
Nov14° / 4860.110.24.7
Dec / -2°294.21.19.71.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34852
44852
54753
64753
74654
84555
94654
104456
114456
124555
134456
144555
154555
164555
174654
184654
194555
204654
214654
224654
234753
244753
254852
264852
274753
284753
294852
304753
314654

Chance of precipitation in May

Any precipitation

Hwasun gets around 106 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 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
127
228
328
428
529
629
729
829
929
1029
1129
1229
1328
1428
1528
1627
1727
1827
1926
2026
2126
2225
2325
2425
2525
2624
2724
2824
2924
3024
3124

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 64% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1781561
2781561
3771661
4761671
5751771
6751771
7741871
8741871
9741871
10731971
11731971
12731971
13722071
14712171
15702181
16692281
17682381
18662491
19652591
206326101
216227101
226028111
235829112
245630122
255332132
265133142
274934152
284635162
294337173
304038193
313739204

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
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 12 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 5:47 AM to 5:25 AM, and sunset from 7:11 PM to 7:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:477:11
213.45:467:12
313.55:457:13
413.55:447:14
513.55:437:14
613.65:427:15
713.65:417:16
813.65:407:17
913.65:397:18
1013.75:387:19
1113.75:377:19
1213.75:377:20
1313.85:367:21
1413.85:357:22
1513.85:347:23
1613.85:337:23
1713.95:327:24
1813.95:327:25
1913.95:317:26
2013.95:307:26
2114.05:307:27
2214.05:297:28
2314.05:287:29
2414.05:287:29
2514.05:277:30
2614.15:277:31
2714.15:267:32
2814.15:267:32
2914.15:257:33
3014.15:257:34
3114.25:257:34

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.76 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.76 kWh/m² in May across the year — May's 5.76 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Hwasun

In seasonPeak

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

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

Hwasun'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 Hwasun?

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

7.1
Sightseeing
2nd-best month of the year
5.6
Beach & pool
4th-best month of the year

May is one of the better times to visit Hwasun for general sightseeing.

What to pack for Hwasun in May

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

In May, Hwasun sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

Sea temperature near Hwasun 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 66 km away) is warmest in August at about 25°C and coldest in February near 6°C.

It's comfortable for a long swim from Jun 26 to Oct 11 — about 3.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan8Bracing
Feb6Bracing
Mar7Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec11Bracing

UV index in Hwasun 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 Hwasun peaks around July 12 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 highModerateJul 12UV 8Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug7Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Hwasun 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 Hwasun is worst in March — around 61 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (August, 28 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorModerateMar 1960 µg/m³Aug 1129 µg/m³
PM2.5 (µg/m³)Level
Jan41Poor
Feb48Poor
Mar61Unhealthy
Apr54Poor
May45Poor
Jun39Poor
Jul29Moderate
Aug28Moderate
Sep33Moderate
Oct35Moderate
Nov38Poor
Dec34Moderate
Location & terrain

Where is Hwasun?

Hwasun sits at 35.1°N, 127.0°E, 75 m above sea level, in South Korea. The nearest listed city is Gwangju, 12 km away.

YeongamBeolgyo

Topography around Hwasun

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

Within 3 km, the terrain around Hwasun has significant variations in elevation — a maximum elevation change of 558 m around an average of 170 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,167 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,875 m.

The land around Hwasun is covered by trees (68%) within 3 km, trees (73%) within 16 km, and trees (53%), cropland (21%) and water (21%) within 80 km.

3 km
558 m
16 km
1,167 m
80 km
1,875 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Gwangju 12 km · Masan 16 km · Naju 25 km · Damyang 29 km · Jangseong 32 km · Boseong 33 km · Yeongam 39 km · Beolgyo 40 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 Hwasun (35.0613°, 126.9875°, elevation 75 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).