Seonghwan weather in October

In October, Seonghwan sees average daytime highs of 20°C and overnight lows near 9°C, with 58 mm of rain across 5.3 wet days and about 11 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 17°C by the end. The sky is clear or mostly clear about 50% 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 30 min by month's end. Set against the rest of the year, October is Seonghwan's 1st-clearest and 10th-windiest month. For the whole year in context, see Seonghwan's year-round climate.

Daytime high
20°
6th warmest
Overnight low
7th coldest
Rainfall
58 mm
5.3 wet days
Daylight
11 hours
6:45 AM – 5:48 PM
Cloud cover
44%
1st clearest
Wind
8 km/h
10th windiest
Solar energy
3.71 kWh/m²
Travel score
7.2
out of 10

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 17°C by the end.

A typical October day in Seonghwan reaches about 20°C in the afternoon and slips back to 9°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, October runs about 6°C cooler than September and about 8°C warmer than November.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12313
22313
32312
42212
52212
62212
72211
82211
92211
102111
112111
122110
132110
142110
152010
16209
17209
18209
19199
20198
21198
22198
23188
24187
25187
26187
27177
28177
29176
30176
31166

How October really feels in Seonghwan

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.

Seonghwan 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 / -6°234.22.59.80.0
Feb / -4°294.21.710.60.4
Mar11° / 456.41.411.73.2
Apr18° / 767.30.112.96.3
May24° / 12°917.7013.97.2
Jun28° / 18°1278.5014.56.5
Jul29° / 22°27816.7014.34.5
Aug30° / 22°24715.3013.44.6
Sep26° / 17°1328.1012.37.0
Oct20° / 585.30117.2
Nov12° / 476.80.3103.6
Dec / -4°245.21.99.50.2

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of October, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25644
35644
45743
55842
65941
75941
86040
96139
106238
116337
126436
136436
146634
156634
166634
176832
186832
196931
206931
217030
227030
237030
247129
257030
267030
277030
287030
297030
307030
316832

Chance of precipitation in October

Any precipitation

Seonghwan gets around 58 mm of rain over 5.3 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 17% and peaks near 19% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
118
218
318
418
517
617
717
817
916
1016
1116
1215
1315
1415
1515
1615
1716
1816
1916
2016
2116
2216
2316
2417
2517
2617
2718
2818
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 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15032144
25430133
35629123
45828113
56127102
6642592
7662482
8692272
9732061
10751951
11781741
12791641
13811531
14841330
15851230
16871120
17881020
1889920
1991810
2092710
2193610
2294510
2395500
2496400
2596400
2697300
2797300
2898200
2998200
3098200
3198200

Wind in October

Winds average 8 km/h in October.

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

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over October. Sunrise moves from 6:32 AM to 7:00 AM, and sunset from 6:09 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:326:09
211.66:336:08
311.56:336:06
411.56:346:05
511.56:356:03
611.46:366:02
711.46:376:00
811.36:385:59
911.36:395:57
1011.36:405:56
1111.26:415:55
1211.26:425:53
1311.26:435:52
1411.16:445:50
1511.16:445:49
1611.06:455:48
1711.06:465:46
1811.06:475:45
1910.96:485:44
2010.96:495:42
2110.86:505:41
2210.86:515:40
2310.86:525:39
2410.76:535:37
2510.76:545:36
2610.76:555:35
2710.66:565:34
2810.66:575:33
2910.66:585:32
3010.56:595:31
3110.57:005:30

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.71 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.85 kWh/m² in May across the year — October's 3.71 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Bright
44.0Moderate
54.0Moderate
64.0Moderate
74.0Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.8Moderate
143.8Moderate
153.8Moderate
163.7Moderate
173.7Moderate
183.7Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.2Moderate
313.2Moderate
Planning a trip in October

Hazard calendar for Seonghwan

In seasonPeak

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

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

Seonghwan'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 Seonghwan?

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

7.2
Sightseeing
1st-best month of the year
3.7
Beach & pool
6th-best month of the year

October is one of the better times to visit Seonghwan for general sightseeing.

What to pack for Seonghwan in October

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

In October, Seonghwan sees daytime highs around 20°C and nights near 9°C. Little to plan around — just the basics. About 5 days see rain.

Sea temperature near Seonghwan in October

The nearest coast averages about 20°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 51 km away) is warmest in August at about 23°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 12 to Oct 14 — about 3.1 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan6Bracing
Feb4Bracing
Mar5Bracing
Apr8Bracing
May12Bracing
Jun16Cool
Jul21Refreshing
Aug23Refreshing
Sep23Refreshing
Oct20Cool
Nov15Cool
Dec10Bracing

UV index in Seonghwan 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 Seonghwan peaks around August 13 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 highHighModerateAug 13UV 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 Seonghwan 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 Seonghwan is worst in March — around 80 µg/m³ PM2.5 (unhealthy), about 1.8× the cleanest month (July, 45 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1479 µg/m³Jul 2345 µg/m³
PM2.5 (µg/m³)Level
Jan69Unhealthy
Feb72Unhealthy
Mar80Unhealthy
Apr65Unhealthy
May58Unhealthy
Jun54Poor
Jul45Poor
Aug45Poor
Sep56Unhealthy
Oct67Unhealthy
Nov72Unhealthy
Dec65Unhealthy
Location & terrain

Where is Seonghwan?

Seonghwan sits at 36.9°N, 127.1°E, 38 m above sea level, in South Korea. The nearest listed city is Pyeongtaek, 10 km away.

YesanSejong

Topography around Seonghwan

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

Within 3 km, the terrain around Seonghwan has only modest variations in elevation — a maximum elevation change of 162 m around an average of 35 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 566 m; within 80 km, large variations in elevation — a maximum elevation change of 1,126 m.

The land around Seonghwan is covered by trees (37%), cropland (34%) and artificial surfaces (22%) within 3 km, trees (35%), cropland (32%) and artificial surfaces (24%) within 16 km, and trees (53%) and cropland (21%) within 80 km.

3 km
162 m
16 km
566 m
80 km
1,126 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
October weather nearby: Pyeongtaek 10 km · Cheonan 12 km · Anseong 16 km · Asan 19 km · Osan 27 km · Chinch'ŏn 29 km · Yesan 37 km · Sejong 39 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 Seonghwan (36.9156°, 127.1314°, elevation 38 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).