Muan weather in August

In August, Muan sees average daytime highs of 30°C and overnight lows near 24°C, with 206 mm of rain across 14.6 wet days and about 13.3 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 29°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 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Muan's 9th-clearest and 10th-windiest month. For the whole year in context, see Muan's year-round climate.

Daytime high
30°
1st warmest
Overnight low
24°
12th coldest
Rainfall
206 mm
14.6 wet days
Daylight
13 h 18 min
5:58 AM – 7:18 PM
Cloud cover
64%
9th clearest
Wind
11 km/h
10th windiest
Solar energy
4.93 kWh/m²
Travel score
4.4
out of 10

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 29°C by the end.

A typical August day in Muan reaches about 30°C in the afternoon and slips back to 24°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 about 1°C warmer than 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
113124
123124
133124
143024
153024
163024
173024
183024
193023
203023
213023
223023
232923
242923
252923
262923
272922
282922
292922
302922
312922

How August really feels in Muan

Once humidity and wind are folded in, August averages 26 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
26
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.

Muan 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 / -1°264.629.90.4
Feb / 345.10.910.71.3
Mar12° / 5970.411.73.6
Apr18° / 817.5012.96.1
May23° / 13°927.9013.87.1
Jun26° / 18°1569.4014.36.4
Jul29° / 23°21915.2014.14.8
Aug30° / 24°20614.6013.34.4
Sep27° / 19°1478.9012.26.7
Oct21° / 13°524.3011.17.7
Nov15° / 456010.25.0
Dec / 264.51.49.71.7

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 16% of August, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24654
34654
44753
54654
64654
74654
84654
94654
104555
114456
124456
134456
144357
154357
164357
174357
184258
194258
204159
214159
224159
234159
244060
254060
264060
274060
284159
294159
304159
314258

Chance of precipitation in August

Any precipitation

Muan gets around 206 mm of rain over 14.6 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 49% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
143
243
344
444
545
645
745
845
946
1046
1146
1247
1347
1447
1548
1648
1749
1849
1949
2049
2149
2249
2349
2449
2549
2648
2747
2847
2946
3045
3144

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 44% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10194446
20194446
30194446
40194446
501104446
601104445
701104444
801114543
901114542
1001124641
1101124740
1201134738
1301144837
1402154835
1502164934
1602174933
1702184831
1802194830
1903214829
2003224827
2104234726
2205254624
2306264522
2406284421
2507304320
2608314218
2709334017
28111343916
29112363714
30114373513
31115383412

Wind in August

Winds average 11 km/h in August.

Across August, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 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 5:47 AM to 6:10 AM, and sunset from 7:33 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:477:33
213.75:487:33
313.75:487:32
413.75:497:31
513.75:507:30
613.65:517:29
713.65:517:28
813.65:527:27
913.55:537:26
1013.55:547:25
1113.55:557:24
1213.55:557:23
1313.45:567:21
1413.45:577:20
1513.45:587:19
1613.35:587:18
1713.35:597:17
1813.36:007:16
1913.26:017:14
2013.26:017:13
2113.26:027:12
2213.16:037:11
2313.16:047:09
2413.16:057:08
2513.06:057:07
2613.06:067:05
2713.06:077:04
2812.96:087:03
2912.96:087:01
3012.86:097:00
3112.86:106:58

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.93 kWh/m².

For context, solar energy here swings from a low near 2.23 kWh/m² to a high of 5.91 kWh/m² in May across the year — August's 4.93 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.2Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.1Bright
135.0Bright
145.0Bright
155.0Bright
164.9Bright
174.9Bright
184.9Bright
194.8Bright
204.8Bright
214.8Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in August

Hazard calendar for Muan

In seasonPeak

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

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

Muan'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 Muan?

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

4.4
Sightseeing
8th-best month of the year
6.1
Beach & pool
3rd-best month of the year

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

What to pack for Muan in August

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

In August, Muan sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Muan 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 36 km away) is warmest in August at about 25°C and coldest in February near 7°C.

It's comfortable for a long swim from Jun 28 to Oct 9 — about 3.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan8Bracing
Feb7Bracing
Mar7Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul22Refreshing
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec11Bracing

UV index in Muan 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 Muan peaks around June 21 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highHighModerateJun 21UV 8Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug8Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Muan 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 Muan 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 Muan?

Muan sits at 35.0°N, 126.5°E, 21 m above sea level, in South Korea. The nearest listed city is Mokpo, 21 km away.

MasanSinanGwangjuJangseong

Topography around Muan

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

Within 3 km, the terrain around Muan has significant variations in elevation — a maximum elevation change of 284 m around an average of 55 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 345 m; within 80 km, large variations in elevation — a maximum elevation change of 1,171 m.

The land around Muan is covered by trees (52%) and cropland (31%) within 3 km, cropland (36%), trees (33%) and water (20%) within 16 km, and water (45%) and trees (34%) within 80 km.

3 km
284 m
16 km
345 m
80 km
1,171 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Mokpo 21 km · Naju 22 km · Yeongam 29 km · Yeonggwang 32 km · Masan 36 km · Sinan 38 km · Gwangju 44 km · Jangseong 44 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 Muan (34.9901°, 126.479°, elevation 21 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).