Jumunjin weather in August

In August, Jumunjin sees average daytime highs of 26°C and overnight lows near 21°C, with 205 mm of rain across 15.6 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 25°C by the end. The sky is clear or mostly clear about 22% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Jumunjin's 11th-clearest and 11th-windiest month. For the whole year in context, see Jumunjin's year-round climate.

Daytime high
26°
1st warmest
Overnight low
21°
12th coldest
Rainfall
205 mm
15.6 wet days
Daylight
13 h 30 min
5:45 AM – 7:13 PM
Cloud cover
68%
11th clearest
Wind
8 km/h
11th windiest
Solar energy
4.48 kWh/m²
Travel score
5.7
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 25°C by the end.

A typical August day in Jumunjin reaches about 26°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°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)
12722
22722
32722
42722
52722
62722
72722
82722
92722
102722
112722
122722
132722
142722
152722
162722
172621
182621
192621
202621
212621
222621
232621
242620
252520
262520
272520
282520
292520
302519
312519

How August really feels in Jumunjin

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Jumunjin weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°4465.19.70.0
Feb / -4°425.64.710.50.1
Mar / 598.14.411.72.0
Apr15° / 707.70.9134.9
May20° / 12°787.70146.7
Jun23° / 17°989.7014.66.7
Jul26° / 21°20014.2014.45.9
Aug26° / 21°20515.6013.55.7
Sep23° / 16°16611.1012.36.5
Oct18° / 10°767.80116.2
Nov11° / 637.71.4103.2
Dec / -2°375.22.99.40.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33961
43961
53961
63961
73961
83862
93862
103862
113862
123862
133664
143664
153664
163565
173565
183565
193565
203565
213664
223565
233565
243664
253565
263565
273664
283763
293862
303961
313862

Chance of precipitation in August

Any precipitation

Jumunjin gets around 205 mm of rain over 15.6 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 50% and peaks near 52% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
146
246
346
446
546
647
747
847
948
1048
1149
1249
1350
1450
1551
1651
1751
1852
1952
2052
2152
2252
2352
2452
2552
2652
2751
2851
2950
3050
3149

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100729613
200728623
300727633
401727623
501726633
601727623
701727614
801828594
901829584
1001830574
1101932544
1201934533
13011035513
14011137493
15011238463
16011339443
17011540422
18021641392
19021842372
20021942352
21032142331
22032342311
23042442291
24052641271
25062841251
26073040231
27083139210
28093338200
290103536180
301123635160
311133734150

Wind in August

Winds average 8 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
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 hours 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 66 minutes over August. Sunrise moves from 5:31 AM to 5:58 AM, and sunset from 7:30 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:317:30
213.95:327:29
313.95:337:28
413.95:347:27
513.95:357:26
613.85:367:25
713.85:377:24
813.85:377:23
913.75:387:22
1013.75:397:21
1113.75:407:19
1213.65:417:18
1313.65:427:17
1413.55:437:16
1513.55:447:14
1613.55:457:13
1713.45:457:12
1813.45:467:10
1913.45:477:09
2013.35:487:08
2113.35:497:06
2213.35:507:05
2313.25:517:04
2413.25:527:02
2513.15:527:01
2613.15:536:59
2713.15:546:58
2813.05:556:56
2913.05:566:55
3012.95:576:53
3112.95:586:52

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.48 kWh/m².

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 5.9 kWh/m² in May across the year — August's 4.48 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
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
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.2Bright
Planning a trip in August

Hazard calendar for Jumunjin

In seasonPeak

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

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

Jumunjin'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 Jumunjin?

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

5.7
Sightseeing
6th-best month of the year
5.6
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Jumunjin for sightseeing.

What to pack for Jumunjin in August

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

In August, Jumunjin sees daytime highs around 26°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 16 days see rain.

rain gearlight clothes

Sea temperature near Jumunjin in August

The nearest coast averages about 24°C in August — 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 9°C.

It's comfortable for a long swim from Jul 1 to Oct 7 — about 3.3 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb9Bracing
Mar9Bracing
Apr12Bracing
May14Bracing
Jun18Cool
Jul22Refreshing
Aug24Warm
Sep22Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index in Jumunjin in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jumunjin peaks around August 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateLowAug 16UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun8Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Jumunjin 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 Jumunjin is worst in March — around 36 µg/m³ PM2.5 (poor), about 2.8× the cleanest month (September, 13 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateMar 2136 µg/m³Sep 1513 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb28Moderate
Mar36Poor
Apr34Moderate
May29Moderate
Jun21Moderate
Jul18Moderate
Aug16Moderate
Sep13Moderate
Oct17Moderate
Nov21Moderate
Dec19Moderate
Location & terrain

Where is Jumunjin?

Jumunjin sits at 37.9°N, 128.8°E, 9 m above sea level, in South Korea. The nearest listed city is Gangneung, 16 km away.

SokchoDonghae CitySantyokuKosongPyeongchangYangguT’aebaek

Topography around Jumunjin

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

Within 3 km, the terrain around Jumunjin has only modest variations in elevation — a maximum elevation change of 96 m around an average of 12 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,006 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,646 m.

The land around Jumunjin is covered by water (43%) and trees (30%) within 3 km, water (49%) and trees (43%) within 16 km, and trees (64%) and water (31%) within 80 km.

3 km
96 m
16 km
1,006 m
80 km
1,646 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Gangneung 16 km · Sokcho 41 km · Donghae City 46 km · Santyoku 59 km · Kosong 63 km · Pyeongchang 69 km · Yanggu 77 km · T’aebaek 81 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 Jumunjin (37.8914°, 128.8258°, elevation 9 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).