Yesan weather in August

In August, Yesan sees average daytime highs of 30°C and overnight lows near 23°C, with 235 mm of rain across 15 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 28°C by the end. The sky is clear or mostly clear about 27% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Yesan's 11th-clearest and 10th-windiest month. For the whole year in context, see Yesan's year-round climate.

Daytime high
30°
1st warmest
Overnight low
23°
12th coldest
Rainfall
235 mm
15 wet days
Daylight
13 h 24 min
5:54 AM – 7:19 PM
Cloud cover
65%
11th clearest
Wind
9 km/h
10th windiest
Solar energy
4.49 kWh/m²
Travel score
4.6
out of 10

Yesan is human settlement in South Korea.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 31°C in the first days to 28°C by the end.

A typical August day in Yesan reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113023
123023
133023
143023
153023
163023
173023
183023
193022
202922
212922
222922
232922
242922
252921
262921
272921
282821
292821
302821
312820

How August really feels in Yesan

Once humidity and wind are folded in, August averages 21 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
21
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Yesan weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°224.53.19.80.0
Feb / -3°274.21.710.60.4
Mar11° / 416.11.111.73.2
Apr18° / 697012.96.3
May24° / 13°777.1013.97.3
Jun28° / 18°1177.9014.56.5
Jul29° / 22°24615.5014.34.6
Aug30° / 23°23515013.44.6
Sep26° / 17°1357.9012.27.0
Oct20° / 10°565.2011.17.2
Nov12° / 466.70.4103.8
Dec / -3°235.12.69.50.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24456
34456
44456
54456
64456
74555
84456
94456
104357
114357
124456
134357
144258
154258
164159
174258
184159
194159
204159
214060
224060
234060
244060
254060
264060
274159
284159
294357
304357
314456

Chance of precipitation in August

Any precipitation

Yesan gets around 235 mm of rain over 15 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 47% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
149
249
350
450
550
650
750
850
950
1050
1149
1249
1349
1448
1548
1648
1747
1847
1947
2047
2146
2246
2346
2446
2545
2644
2744
2843
2942
3041
3140

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1001135234
2001135135
3001135135
4002145035
5002144935
6002154935
7002154834
8002164834
9002174832
10003184831
11003194829
12003214828
13003224926
14003244824
15013254822
16014274821
17014294819
18014304717
19015324616
20015334614
21016354512
22027364411
23028374310
2402939428
25031139407
26031240387
27031440366
28041541345
29151740325
30151941314
31162140293

Wind in August

Winds average 9 km/h in August.

Across August, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:42 AM to 6:07 AM, and sunset from 7:35 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:427:35
213.95:437:35
313.85:447:34
413.85:447:33
513.85:457:32
613.75:467:31
713.75:477:30
813.75:487:28
913.65:497:27
1013.65:497:26
1113.65:507:25
1213.55:517:24
1313.55:527:23
1413.55:537:22
1513.45:547:20
1613.45:547:19
1713.45:557:18
1813.35:567:17
1913.35:577:15
2013.35:587:14
2113.25:597:13
2213.25:597:11
2313.26:007:10
2413.16:017:08
2513.16:027:07
2613.06:037:06
2713.06:047:04
2813.06:047:03
2912.96:057:01
3012.96:067:00
3112.96:076:58

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.49 kWh/m².

For context, solar energy here swings from a low near 2.21 kWh/m² to a high of 5.93 kWh/m² in May across the year — August's 4.49 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in August

Hazard calendar for Yesan

In seasonPeak

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

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

Yesan'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 August a good time to visit Yesan?

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

4.6
Sightseeing
6th-best month of the year
6.1
Beach & pool
3rd-best month of the year

August is a reasonable time to visit Yesan for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Yesan in August

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

In August, Yesan sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 15 days see rain.

light clothesrain gear

Sea temperature near Yesan in August

The nearest coast averages about 25°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 42 km away) is warmest in August at about 25°C and coldest in February near 5°C.

It's comfortable for a long swim from Jul 4 to Oct 7 — about 3.2 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb5Bracing
Mar6Bracing
Apr8Bracing
May12Bracing
Jun18Cool
Jul22Refreshing
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec11Bracing

UV index in Yesan in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Yesan peaks around July 24 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 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 24UV 8Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May6High
Jun7High
Jul8Very high
Aug8Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Yesan in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Yesan is worst in March — around 92 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (July, 46 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1391 µg/m³Jul 2246 µg/m³
PM2.5 (µg/m³)Level
Jan83Unhealthy
Feb85Unhealthy
Mar92Unhealthy
Apr75Unhealthy
May62Unhealthy
Jun57Unhealthy
Jul46Poor
Aug47Poor
Sep61Unhealthy
Oct74Unhealthy
Nov79Unhealthy
Dec73Unhealthy
Location & terrain

Where is Yesan?

Yesan sits at 36.7°N, 126.8°E, 23 m above sea level, in South Korea. The nearest listed city is Hongseong, 18 km away.

GongjuSeosanSeonghwanSejong

Topography around Yesan

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

Within 3 km, the terrain around Yesan has significant variations in elevation — a maximum elevation change of 402 m around an average of 84 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 615 m; within 80 km, large variations in elevation — a maximum elevation change of 882 m.

The land around Yesan is covered by trees (57%) within 3 km, trees (49%) and cropland (36%) within 16 km, and trees (41%), water (27%) and cropland (21%) within 80 km.

3 km
402 m
16 km
615 m
80 km
882 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Hongseong 18 km · Asan 19 km · Tangjin 31 km · Cheonan 31 km · Gongju 35 km · Seosan 37 km · Seonghwan 37 km · Sejong 41 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 Yesan (36.6776°, 126.8427°, elevation 23 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).