Yeoju weather in September

In September, Yeoju sees average daytime highs of 25°C and overnight lows near 15°C, with 127 mm of rain across 8.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Yeoju's 9th-clearest and 12th-windiest month. For the whole year in context, see Yeoju's year-round climate.

Daytime high
25°
4th warmest
Overnight low
15°
9th coldest
Rainfall
127 mm
8.3 wet days
Daylight
12 h 12 min
6:17 AM – 6:31 PM
Cloud cover
59%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.12 kWh/m²
Travel score
7.0
out of 10

Yeoju is municipal city in Gyeonggi Province, South Korea.

Density
184/km²
people per km²

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 23°C by the end.

A typical September day in Yeoju reaches about 25°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12719
22718
32718
42718
52618
62618
72617
82617
92617
102617
112617
122616
132516
142516
152516
162515
172515
182515
192415
202414
212414
222414
232414
242413
252313
262313
272313
282313
292312
302312

How September really feels in Yeoju

Once humidity and wind are folded in, September 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

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

Yeoju weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -7°234.339.70.0
Feb / -5°304.42.210.60.3
Mar11° / 497.22.111.72.9
Apr18° / 847.80.112.96.0
May23° / 11°988.40147.1
Jun27° / 17°1258.9014.56.5
Jul28° / 21°29516.9014.34.8
Aug29° / 21°23515.2013.44.9
Sep25° / 15°1278.3012.37.0
Oct19° / 585.60116.9
Nov11° / 4670.6103.2
Dec / -5°2652.49.50.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
23961
34060
44060
54159
64159
74258
84357
94357
104357
114456
124555
134555
144654
154654
164753
174951
184951
195050
205050
215248
225248
235248
245248
255248
265248
275347
285347
295446
305545

Chance of precipitation in September

Any precipitation

Yeoju gets around 127 mm of rain over 8.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
241
340
438
537
636
735
833
932
1031
1131
1230
1329
1428
1527
1627
1726
1825
1925
2024
2123
2223
2323
2422
2522
2622
2721
2821
2920
3020

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 19% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12143531181
22163629161
33173727151
43183826141
54193925120
65203924110
7622392390
8823392280
9924392170
101125382060
111326371950
121527361840
131728341730
142029331630
152230311420
162531291320
172732271220
183032251110
193333231010
20353322910
21383420810
22403419710
23433417610
24463316500
25483314400
26523213300
27543112300
28563011300
29592910200
30602810200

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:04 AM to 6:29 AM, and sunset from 6:54 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:046:54
212.86:056:53
312.86:066:51
412.76:076:50
512.76:076:48
612.66:086:47
712.66:096:45
812.66:106:44
912.56:116:42
1012.56:126:40
1112.46:126:39
1212.46:136:37
1312.46:146:36
1412.36:156:34
1512.36:166:32
1612.26:176:31
1712.26:186:29
1812.26:186:28
1912.16:196:26
2012.16:206:24
2112.06:216:23
2212.06:226:21
2311.96:236:20
2411.96:246:18
2511.96:246:16
2611.86:256:15
2711.86:266:13
2811.76:276:12
2911.76:286:10
3011.76:296:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.12 kWh/m².

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 5.77 kWh/m² in May across the year — September's 4.12 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.1Bright
184.1Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.0Bright
264.0Bright
274.0Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Yeoju

In seasonPeak

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

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

Yeoju'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 September a good time to visit Yeoju?

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

7.0
Sightseeing
2nd-best month of the year
6.1
Beach & pool
2nd-best month of the year

September is one of the better times to visit Yeoju for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Yeoju in September

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

In September, Yeoju sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

UV index in Yeoju in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yeoju peaks around August 14 at about 9 (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 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 14UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun7Very high
Jul8Very high
Aug9Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Yeoju in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Yeoju is worst in March — around 123 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyMar 16121 µg/m³Aug 978 µg/m³
PM2.5 (µg/m³)Level
Jan106Unhealthy
Feb108Unhealthy
Mar123Unhealthy
Apr104Unhealthy
May96Unhealthy
Jun91Unhealthy
Jul79Unhealthy
Aug78Unhealthy
Sep97Unhealthy
Oct115Unhealthy
Nov118Unhealthy
Dec100Unhealthy
Location & terrain

Where is Yeoju?

Yeoju sits at 37.3°N, 127.6°E, 50 m above sea level, in South Korea. The nearest listed city is Pubal, 11 km away.

GwangjuChungjuAnseongHanam

Topography around Yeoju

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

Within 3 km, the terrain around Yeoju has only modest variations in elevation — a maximum elevation change of 223 m around an average of 65 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 520 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,438 m.

The land around Yeoju is covered by trees (43%) and artificial surfaces (23%) within 3 km, trees (51%) and cropland (29%) within 16 km, and trees (72%) within 80 km.

3 km
223 m
16 km
520 m
80 km
1,438 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Pubal 11 km · Icheon-si 17 km · Yangp'yŏng 25 km · Wŏnju 28 km · Gwangju 36 km · Chungju 44 km · Anseong 45 km · Hanam 47 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 Yeoju (37.2958°, 127.6339°, elevation 50 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). 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).