Goyang-si weather in October

In October, Goyang-si sees average daytime highs of 20°C and overnight lows near 9°C, with 52 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 16°C by the end. The sky is clear or mostly clear about 51% 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 24 min by month's end. Set against the rest of the year, October is Goyang-si's 2nd-clearest and 10th-windiest month. For the whole year in context, see Goyang-si's year-round climate.

Daytime high
20°
6th warmest
Overnight low
7th coldest
Rainfall
52 mm
5.3 wet days
Daylight
11 hours
6:47 AM – 5:48 PM
Cloud cover
43%
2nd clearest
Wind
8 km/h
10th windiest
Solar energy
3.69 kWh/m²
Travel score
7.1
out of 10

Goyang-si is city in Gyeonggi Province, South Korea.

Density
3,972/km²
people per km²

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 16°C by the end.

A typical October day in Goyang-si 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 15°C and 23°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
92111
102111
112110
122110
132010
142010
15209
16209
17209
18199
19198
20198
21198
22188
23187
24187
25187
26177
27176
28176
29166
30166
31166

How October really feels in Goyang-si

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.

Goyang-si 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 / -7°183.52.39.70.0
Feb / -5°233.91.710.50.3
Mar11° / 355.70.911.72.9
Apr17° / 667.20.112.95.9
May23° / 13°9980147.2
Jun27° / 18°1259014.66.6
Jul28° / 22°31316.3014.34.9
Aug29° / 22°26414.9013.54.7
Sep26° / 17°1207.9012.37.0
Oct20° / 525.30117.1
Nov11° / 4770.3103.2
Dec / -5°224.81.69.40.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25842
35842
45941
55941
66040
76238
86337
96436
106535
116535
126634
136733
146733
156832
166832
176931
186931
197030
207129
217129
227129
237228
247228
257228
267129
277129
287129
297129
307030
317030

Chance of precipitation in October

Any precipitation

Goyang-si gets around 52 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 20% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
120
220
319
419
519
618
718
818
917
1016
1116
1215
1315
1415
1515
1615
1715
1815
1915
2015
2115
2215
2316
2416
2516
2617
2717
2818
2918
3019
3120

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 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14734154
25033143
35331133
45630122
55928112
66226102
7652591
8682381
9712171
10741961
11771850
12791650
13811540
14831340
15851230
16861130
17881020
1889920
1990820
2092710
2192710
2293610
2394510
2495500
2596400
2696400
2797300
2897300
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 9 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
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over October. Sunrise moves from 6:33 AM to 7:03 AM, and sunset from 6:10 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:336:10
211.66:346:09
311.56:356:07
411.56:366:06
511.56:376:04
611.46:386:02
711.46:396:01
811.36:405:59
911.36:415:58
1011.26:425:57
1111.26:435:55
1211.26:435:54
1311.16:445:52
1411.16:455:51
1511.06:465:49
1611.06:475:48
1711.06:485:47
1810.96:495:45
1910.96:505:44
2010.96:515:43
2110.86:525:41
2210.86:535:40
2310.76:545:39
2410.76:555:38
2510.76:575:36
2610.66:585:35
2710.66:595:34
2810.67:005:33
2910.57:015:32
3010.57:025:31
3110.47:035:30

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.69 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.79 kWh/m² in May across the year — October's 3.69 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Bright
44.0Bright
54.0Moderate
64.0Moderate
74.0Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.8Moderate
133.8Moderate
143.8Moderate
153.8Moderate
163.7Moderate
173.7Moderate
183.7Moderate
193.6Moderate
203.6Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.4Moderate
253.4Moderate
263.4Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.2Moderate
313.1Moderate
Planning a trip in October

Hazard calendar for Goyang-si

In seasonPeak

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

Goyang-si sits in the Pacific typhoon belt; the season peaks July–October.

Goyang-si's rainy season runs July–August, 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 Goyang-si?

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

7.1
Sightseeing
2nd-best month of the year
3.5
Beach & pool
6th-best month of the year

October is one of the better times to visit Goyang-si for general sightseeing.

What to pack for Goyang-si in October

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

In October, Goyang-si 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 Goyang-si 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 36 km away) is warmest in August at about 24°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 11 to Oct 13 — 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
Jun17Cool
Jul21Refreshing
Aug24Refreshing
Sep23Refreshing
Oct20Cool
Nov15Bracing
Dec10Bracing

UV index in Goyang-si 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 Goyang-si peaks around July 22 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 22UV 8Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May5High
Jun7High
Jul8Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Goyang-si 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 Goyang-si is worst in March — around 160 µg/m³ PM2.5 (very unhealthy), about 2.0× the cleanest month (August, 81 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyUnhealthyMar 13158 µg/m³Aug 1282 µg/m³
PM2.5 (µg/m³)Level
Jan145Unhealthy
Feb149Unhealthy
Mar160Very unhealthy
Apr127Unhealthy
May111Unhealthy
Jun98Unhealthy
Jul88Unhealthy
Aug81Unhealthy
Sep110Unhealthy
Oct132Unhealthy
Nov142Unhealthy
Dec133Unhealthy
Location & terrain

Where is Goyang-si?

Goyang-si sits at 37.7°N, 126.8°E, 19 m above sea level, in South Korea. The nearest listed city is Gimpo-si, 11 km away.

Topography around Goyang-si

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

Within 3 km, the terrain around Goyang-si has only modest variations in elevation — a maximum elevation change of 98 m around an average of 33 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 778 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,443 m.

The land around Goyang-si is covered by trees (41%) and artificial surfaces (36%) within 3 km, trees (39%) and artificial surfaces (36%) within 16 km, and trees (43%) and water (22%) within 80 km.

3 km
98 m
16 km
778 m
80 km
1,443 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Gimpo-si 11 km · Seoul 16 km · Bucheon-si 18 km · Gwangmyeong 20 km · Uijeongbu-si 21 km · Munsan 23 km · Siheungdong 24 km · Incheon 25 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 Goyang-si (37.6564°, 126.835°, elevation 19 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).