Koch'ang weather in October

In October, Koch'ang sees average daytime highs of 20°C and overnight lows near 11°C, with 57 mm of rain across 5.5 wet days and about 11.1 hours of daylight. It is the 6th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 49% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 36 min by month's end. Set against the rest of the year, October is Koch'ang's 1st-clearest and 9th-windiest month. For the whole year in context, see Koch'ang's year-round climate.

Daytime high
20°
6th warmest
Overnight low
11°
7th coldest
Rainfall
57 mm
5.5 wet days
Daylight
11 h 06 min
6:46 AM – 5:51 PM
Cloud cover
44%
1st clearest
Wind
10 km/h
9th windiest
Solar energy
3.86 kWh/m²
Travel score
7.3
out of 10

Koch'ang is human settlement in South Korea.

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 18°C by the end.

A typical October day in Koch'ang reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, October runs about 5°C cooler than September and about 7°C warmer than November.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12315
22314
32314
42314
52314
62213
72213
82213
92213
102213
112112
122112
132112
142112
152111
162011
172011
182011
192011
202010
211910
221910
231910
24199
25199
26189
27189
28189
29188
30178
31178

How October really feels in Koch'ang

Once humidity and wind are folded in, October 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

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

Koch'ang weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°285.94.19.90.0
Feb / -2°335.41.710.70.7
Mar11° / 557.3111.73.2
Apr17° / 817.5012.95.9
May22° / 13°887.8013.87.1
Jun26° / 18°1479.6014.36.6
Jul29° / 23°23815.6014.14.9
Aug29° / 23°22816013.34.6
Sep26° / 18°1509.5012.26.8
Oct20° / 11°575.5011.17.3
Nov14° / 476.90.210.14.2
Dec / -1°316.52.99.70.9

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25842
35842
45941
56040
66040
76139
86238
96238
106337
116337
126436
136436
146436
156535
166535
176535
186535
196634
206634
216733
226733
236733
246733
256832
266832
276832
286832
296931
306931
316931

Chance of precipitation in October

Any precipitation

Koch'ang gets around 57 mm of rain over 5.5 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
123
223
322
422
521
621
720
819
918
1018
1117
1216
1316
1416
1516
1616
1716
1815
1915
2015
2115
2216
2316
2416
2516
2617
2717
2817
2918
3019
3119

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 74% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
138322181
241312071
344301971
447291761
550281651
654271450
758251340
860241240
963231130
1066211030
116920920
127119820
137417720
147516720
157815610
167914610
178014510
188113510
198312410
208511400
218611300
228710300
23889300
24899200
25908200
26908200
27917200
28927100
29936100
30936100
31945100

Wind in October

Winds average 10 km/h in October.

Across October, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over October. Sunrise moves from 6:33 AM to 7:00 AM, and sunset from 6:12 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:336:12
211.66:346:10
311.66:346:09
411.56:356:07
511.56:366:06
611.56:376:04
711.46:386:03
811.46:396:02
911.36:396:00
1011.36:405:59
1111.36:415:57
1211.26:425:56
1311.26:435:55
1411.26:445:53
1511.16:455:52
1611.16:465:51
1711.16:465:50
1811.06:475:48
1911.06:485:47
2010.96:495:46
2110.96:505:45
2210.96:515:44
2310.86:525:42
2410.86:535:41
2510.86:545:40
2610.76:555:39
2710.76:565:38
2810.76:575:37
2910.66:585:36
3010.66:595:35
3110.67:005:34

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.86 kWh/m².

For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 5.93 kWh/m² in May across the year — October's 3.86 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.0Bright
114.0Bright
124.0Bright
134.0Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.3Moderate
313.3Moderate
Planning a trip in October

Hazard calendar for Koch'ang

In seasonPeak

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

Koch'ang sits in the Pacific typhoon belt; the season peaks July–October.

Koch'ang'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 October a good time to visit Koch'ang?

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

7.3
Sightseeing
1st-best month of the year
4.0
Beach & pool
6th-best month of the year

October is one of the better times to visit Koch'ang for general sightseeing.

What to pack for Koch'ang in October

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

In October, Koch'ang sees daytime highs around 20°C and nights near 11°C. Little to plan around — just the basics. About 6 days see rain.

Sea temperature near Koch'ang in October

The nearest coast averages about 19°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 30 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 Koch'ang in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Koch'ang peaks around September 12 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 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 highHighModerateSep 12UV 8Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr7High
May7Very high
Jun8Very high
Jul8Very high
Aug7Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Koch'ang in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Koch'ang 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 Koch'ang?

Koch'ang sits at 35.4°N, 126.7°E, 44 m above sea level, in South Korea. The nearest listed city is Jangseong, 17 km away.

MasanGwangjuKimje

Topography around Koch'ang

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

Within 3 km, the terrain around Koch'ang has significant variations in elevation — a maximum elevation change of 403 m around an average of 91 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 730 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,720 m.

The land around Koch'ang is covered by trees (48%) and cropland (29%) within 3 km, trees (57%) and cropland (31%) within 16 km, and trees (40%), water (34%) and cropland (21%) within 80 km.

3 km
403 m
16 km
730 m
80 km
1,720 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Jangseong 17 km · Yeonggwang 24 km · Jeongeup 27 km · Damyang 29 km · Buan 33 km · Masan 36 km · Gwangju 37 km · Kimje 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 Koch'ang (35.4333°, 126.7°, elevation 44 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).