Goyang-si in Fall
In fall (September, October and November), Goyang-si sees average daytime highs around 19°C and overnight lows near 9°C, with 218 mm of precipitation over about 20 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 27°C in early September to 7°C by late November. The sky is clear or mostly clear about 46% of the time across fall, and the air most often feels dry.
Fall is Goyang-si's best season of the year to visit on our travel score. For the whole year in context, see Goyang-si's year-round climate.
- Avg daytime high
- 19°C
- 2nd-warmest season
- Avg overnight low
- 9°C
- Precipitation
- 218 mm
- 20 wet days
- Avg wind
- 8 km/h
- Travel score
- 5.8
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Goyang-si in Fall
Over the season highs ease from about 27°C in early September to 7°C by late November.
A typical fall day in Goyang-si reaches about 19°C and drops to 9°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Goyang-si
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 17 that feel at or below 0°C.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Goyang-si weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 2° / -7° | 18 | 3.5 | 2.3 | 9.7 | 0.0 |
| Feb | 5° / -5° | 23 | 3.9 | 1.7 | 10.5 | 0.3 |
| Mar | 11° / 0° | 35 | 5.7 | 0.9 | 11.7 | 2.9 |
| Apr | 17° / 7° | 66 | 7.2 | 0.1 | 12.9 | 5.9 |
| May | 23° / 13° | 99 | 8 | 0 | 14 | 7.2 |
| Jun | 27° / 18° | 125 | 9 | 0 | 14.6 | 6.6 |
| Jul | 28° / 22° | 313 | 16.3 | 0 | 14.3 | 4.9 |
| Aug | 29° / 22° | 264 | 14.9 | 0 | 13.5 | 4.7 |
| Sep | 26° / 17° | 120 | 7.9 | 0 | 12.3 | 7.0 |
| Oct | 20° / 9° | 52 | 5.3 | 0 | 11 | 7.1 |
| Nov | 11° / 2° | 47 | 7 | 0.3 | 10 | 3.2 |
| Dec | 4° / -5° | 22 | 4.8 | 1.6 | 9.4 | 0.1 |
Cloud cover in Fall
The sky is clear or mostly clear about 46% of the time across fall.
Chance of precipitation in Fall
Goyang-si gets around 218 mm of rain and snow over 20 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 54 min in early September to 9 h 36 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.5 kWh/m².
Hazard calendar for Goyang-si
In fall, Goyang-si overlaps 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.
Is fall a good time to visit Goyang-si?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Goyang-si for sightseeing.
What to pack for Goyang-si in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Goyang-si sees daytime highs around 19°C and nights near 9°C. Pack a warm layer. Worth having: light clothes. About 20 days see rain.
Sea temperature near Goyang-si in Fall
The nearest coast averages about 19°C across fall — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 6 | 4 | 5 | 8 | 12 | 17 | 21 | 24 | 23 | 20 | 15 | 10 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 6 | Bracing |
| Feb | 4 | Bracing |
| Mar | 5 | Bracing |
| Apr | 8 | Bracing |
| May | 12 | Bracing |
| Jun | 17 | Cool |
| Jul | 21 | Refreshing |
| Aug | 24 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 20 | Cool |
| Nov | 15 | Bracing |
| Dec | 10 | Bracing |
UV index in Goyang-si in Fall
Clear-sky midday UV across fall averages 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 6 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | High | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 5 | High |
| Jun | 7 | High |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Goyang-si in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 145 | 149 | 160 | 127 | 111 | 98 | 88 | 81 | 110 | 132 | 142 | 133 |
| Level | Unhealthy | Unhealthy | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 145 | Unhealthy |
| Feb | 149 | Unhealthy |
| Mar | 160 | Very unhealthy |
| Apr | 127 | Unhealthy |
| May | 111 | Unhealthy |
| Jun | 98 | Unhealthy |
| Jul | 88 | Unhealthy |
| Aug | 81 | Unhealthy |
| Sep | 110 | Unhealthy |
| Oct | 132 | Unhealthy |
| Nov | 142 | Unhealthy |
| Dec | 133 | Unhealthy |
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.
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
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.