Taesal-li weather in September

In September, Taesal-li sees average daytime highs of 24°C and overnight lows near 20°C, with 127 mm of rain across 7.3 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 22°C by the end. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels muggy.

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 Taesal-li's 5th-clearest and 10th-windiest month. For the whole year in context, see Taesal-li's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
127 mm
7.3 wet days
Daylight
12 h 12 min
6:22 AM – 6:35 PM
Cloud cover
51%
5th clearest
Wind
13 km/h
10th windiest
Solar energy
4.34 kWh/m²
Travel score
7.3
out of 10

Taesal-li is human settlement in South Korea.

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 25°C in the first days to 22°C by the end.

A typical September day in Taesal-li reaches about 24°C in the afternoon and slips back to 20°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 26°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12522
22522
32522
42522
52522
62522
72522
82521
92421
102421
112421
122421
132421
142421
152420
162420
172320
182320
192320
202320
212319
222319
232319
242219
252219
262219
272218
282218
292218
302118

How September really feels in Taesal-li

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.

Taesal-li weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°245.23.99.80.0
Feb / -1°284.21.610.60.0
Mar / 405.70.911.71.1
Apr12° / 726.7012.93.6
May17° / 13°907.2013.95.9
Jun21° / 18°1197.4014.56.8
Jul25° / 22°25613.9014.36.1
Aug27° / 24°21812.4013.46.3
Sep24° / 20°1277.3012.37.3
Oct18° / 15°585.50116.7
Nov12° / 568.30.5103.3
Dec / 317.73.99.50.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25248
35248
45347
55347
65446
75446
85545
95446
105446
115545
125545
135644
145545
155644
165644
175743
185743
195743
205842
215842
225842
235842
245842
255842
265842
275842
285842
295842
305941

Chance of precipitation in September

Any precipitation

Taesal-li gets around 127 mm of rain over 7.3 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 25% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
234
333
432
531
630
729
828
928
1027
1126
1226
1325
1425
1525
1624
1724
1823
1923
2022
2122
2222
2322
2422
2522
2621
2721
2821
2921
3020

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 44% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1131541364
2131642344
3141843323
4151943293
5152143272
6162244252
7272344231
8282443211
92102542201
103112642181
113122840160
124142939150
135153037130
146163036120
157183134110
168193232100
17921333080
181022332870
191123342660
201224342450
211325352250
221426352040
231627351930
241828351720
251928351520
262129351410
272329341210
282629331110
292830321000
30303031900

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

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 6:09 AM to 6:33 AM, and sunset from 6:59 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:096:59
212.86:106:57
312.86:116:56
412.76:126:54
512.76:126:53
612.66:136:51
712.66:146:50
812.66:156:48
912.56:166:47
1012.56:176:45
1112.46:176:43
1212.46:186:42
1312.46:196:40
1412.36:206:39
1512.36:216:37
1612.26:226:35
1712.26:226:34
1812.26:236:32
1912.16:246:31
2012.16:256:29
2112.06:266:28
2212.06:276:26
2311.96:276:24
2411.96:286:23
2511.96:296:21
2611.86:306:20
2711.86:316:18
2811.76:326:17
2911.76:336:15
3011.76:336:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.34 kWh/m².

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 5.91 kWh/m² in May across the year — September's 4.34 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Hazard calendar for Taesal-li

In seasonPeak

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

Taesal-li sits in the Pacific typhoon belt; the season peaks July–October.

Taesal-li'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 Taesal-li?

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

7.3
Sightseeing
1st-best month of the year
5.8
Beach & pool
2nd-best month of the year

September is one of the better times to visit Taesal-li for general sightseeing.

What to pack for Taesal-li in September

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

In September, Taesal-li sees daytime highs around 24°C and nights near 20°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Taesal-li 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 18 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 12 — 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
Aug23Refreshing
Sep23Refreshing
Oct20Cool
Nov15Cool
Dec10Bracing

UV index in Taesal-li 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 Taesal-li peaks around July 20 at about 7 (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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 20UV 7Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May6High
Jun7High
Jul8Very high
Aug7Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Taesal-li 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 Taesal-li 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 Taesal-li?

Taesal-li sits at 37.0°N, 126.5°E, 13 m above sea level, in South Korea. The nearest listed city is Tangjin, 18 km away.

Hwaseong-siHongseongYesanAnsanAsanPyeongtaek

Topography around Taesal-li

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

Within 3 km, the terrain around Taesal-li has only modest variations in elevation — a maximum elevation change of 178 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 292 m; within 80 km, large variations in elevation — a maximum elevation change of 769 m.

The land around Taesal-li is covered by cropland (43%) and trees (29%) within 3 km, water (45%), trees (24%) and cropland (21%) within 16 km, and water (52%) and trees (24%) within 80 km.

3 km
178 m
16 km
292 m
80 km
769 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tangjin 18 km · Seosan 21 km · Hwaseong-si 41 km · Hongseong 45 km · Yesan 48 km · Ansan 51 km · Asan 53 km · Pyeongtaek 56 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 Taesal-li (36.9714°, 126.4542°, elevation 13 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).