Pyeongtaek weather in September

In September, Pyeongtaek sees average daytime highs of 26°C and overnight lows near 17°C, with 127 mm of rain across 7.8 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 24°C by the end. The sky is clear or mostly clear about 37% 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 Pyeongtaek's 9th-clearest and 11th-windiest month. For the whole year in context, see Pyeongtaek's year-round climate.

Daytime high
26°
4th warmest
Overnight low
17°
9th coldest
Rainfall
127 mm
7.8 wet days
Daylight
12 h 12 min
6:19 AM – 6:33 PM
Cloud cover
55%
9th clearest
Wind
8 km/h
11th windiest
Solar energy
4.25 kWh/m²
Travel score
7.0
out of 10

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 24°C by the end.

A typical September day in Pyeongtaek reaches about 26°C in the afternoon and slips back to 17°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°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°35°151015202530
Avg high (°C)Avg low (°C)
12820
22820
32720
42720
52720
62720
72719
82719
92719
102619
112619
122618
132618
142618
152618
162617
172617
182517
192517
202516
212516
222516
232516
242416
252415
262415
272415
282415
292314
302314

How September really feels in Pyeongtaek

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.

Pyeongtaek 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 / -5°214.12.49.70.0
Feb / -4°274.21.510.60.4
Mar11° / 416.31.111.73.1
Apr18° / 687012.96.2
May24° / 13°847.20147.3
Jun27° / 18°1197.8014.56.6
Jul29° / 22°26015.6014.34.7
Aug29° / 23°23215.1013.44.7
Sep26° / 17°1277.8012.37.0
Oct20° / 10°555.10117.2
Nov12° / 466.80.3103.6
Dec / -3°235.21.89.50.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24852
34852
44951
54852
64951
75050
84951
95149
105050
115050
125149
135149
145149
155149
165248
175248
185347
195446
205446
215446
225446
235545
245545
255545
265644
275644
285644
295743
305743

Chance of precipitation in September

Any precipitation

Pyeongtaek gets around 127 mm of rain over 7.8 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 27% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
238
337
436
534
633
732
831
930
1029
1129
1228
1328
1427
1527
1626
1725
1824
1924
2023
2123
2222
2322
2422
2521
2621
2721
2820
2920
3019

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1152239303
2162339283
3172539262
4272639242
5282838222
6292938201
73113038181
84123037161
94133137150
105153136130
116163235110
127183233100
13819323290
141021323070
151123312860
161324312650
171426312550
181627302240
191829302030
202030301830
212231291620
222332291420
232632281310
242833271110
253034261010
26323425810
27343424710
28373422600
29403421600
30423320500

Wind in September

Winds average 8 km/h in September.

Across September, 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.

051015151015202530
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

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 6:06 AM to 6:31 AM, and sunset from 6:56 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:066:56
212.86:076:55
312.86:086:53
412.76:096:52
512.76:106:50
612.66:116:49
712.66:116:47
812.66:126:46
912.56:136:44
1012.56:146:42
1112.46:156:41
1212.46:166:39
1312.46:166:38
1412.36:176:36
1512.36:186:35
1612.26:196:33
1712.26:206:31
1812.26:216:30
1912.16:226:28
2012.16:226:27
2112.06:236:25
2212.06:246:23
2311.96:256:22
2411.96:266:20
2511.96:276:19
2611.86:276:17
2711.86:286:16
2811.76:296:14
2911.76:306:12
3011.76:316:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.25 kWh/m².

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.87 kWh/m² in May across the year — September's 4.25 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Hazard calendar for Pyeongtaek

In seasonPeak

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

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

Pyeongtaek'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 September a good time to visit Pyeongtaek?

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

7.0
Sightseeing
3rd-best month of the year
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Pyeongtaek in September

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

In September, Pyeongtaek sees daytime highs around 26°C and nights near 17°C. Worth packing: light clothes. About 8 days see rain.

light clothes

Sea temperature near Pyeongtaek in September

The nearest coast averages about 23°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 44 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 Pyeongtaek 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 Pyeongtaek 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 Pyeongtaek 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 Pyeongtaek is worst in March — around 92 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (July, 46 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1391 µg/m³Jul 2246 µg/m³
PM2.5 (µg/m³)Level
Jan83Unhealthy
Feb85Unhealthy
Mar92Unhealthy
Apr75Unhealthy
May62Unhealthy
Jun57Unhealthy
Jul46Poor
Aug47Poor
Sep61Unhealthy
Oct74Unhealthy
Nov79Unhealthy
Dec73Unhealthy
Location & terrain

Where is Pyeongtaek?

Pyeongtaek sits at 37.0°N, 127.1°E, 14 m above sea level, in South Korea. The nearest listed city is Seonghwan, 10 km away.

Hwaseong-siChinch'ŏn

Topography around Pyeongtaek

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

Within 3 km, the terrain around Pyeongtaek has only modest variations in elevation — a maximum elevation change of 64 m around an average of 13 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 316 m; within 80 km, large variations in elevation — a maximum elevation change of 1,126 m.

The land around Pyeongtaek is covered by artificial surfaces (44%) and cropland (39%) within 3 km, cropland (39%), trees (25%) and artificial surfaces (25%) within 16 km, and trees (51%) within 80 km.

3 km
64 m
16 km
316 m
80 km
1,126 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Seonghwan 10 km · Anseong 16 km · Osan 18 km · Cheonan 22 km · Asan 25 km · Suwon 34 km · Hwaseong-si 34 km · Chinch'ŏn 35 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 Pyeongtaek (36.9947°, 127.0889°, elevation 14 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).