Sinhyeon weather in September

In September, Sinhyeon sees average daytime highs of 24°C and overnight lows near 21°C, with 172 mm of rain across 9.4 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 4th-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 35% 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 Sinhyeon's 9th-clearest and 6th-windiest month. For the whole year in context, see Sinhyeon's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
172 mm
9.4 wet days
Daylight
12 h 12 min
6:13 AM – 6:26 PM
Cloud cover
57%
9th clearest
Wind
19 km/h
6th windiest
Solar energy
4.23 kWh/m²
Travel score
6.9
out of 10

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 Sinhyeon reaches about 24°C in the afternoon and slips back to 21°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 2°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12623
22623
32523
42523
52523
62523
72523
82522
92522
102522
112522
122522
132422
142422
152421
162421
172421
182421
192421
202421
212321
222320
232320
242320
252320
262320
272320
282219
292219
302219

How September really feels in Sinhyeon

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.

Sinhyeon weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 364.59.91.0
Feb / 50510.71.7
Mar11° / 957.611.73.0
Apr15° / 11°1328.412.94.6
May18° / 15°1397.813.86.1
Jun21° / 19°1809.314.36.3
Jul25° / 23°25212.814.16.3
Aug26° / 24°2051213.36.3
Sep24° / 21°1729.412.26.9
Oct20° / 16°764.811.17.2
Nov14° / 10°555.410.25.0
Dec / 343.99.72.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24357
34357
44357
54456
64456
74456
84555
94654
104654
114753
124852
134852
144951
154951
165050
175050
185149
195149
205347
215347
225347
235347
245347
255446
265446
275446
285545
295545
305644

Chance of precipitation in September

Any precipitation

Sinhyeon gets around 172 mm of rain over 9.4 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 31% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
337
437
537
636
736
836
935
1035
1135
1234
1334
1433
1532
1632
1731
1830
1929
2029
2128
2227
2327
2426
2526
2625
2725
2824
2923
3023

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 53% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10113373117
20214383016
30215393014
40216402913
50317402811
61418412710
7142041268
8152141257
9162241246
10172340235
11282440234
122102539223
132112638212
143122736192
154142835181
164152934171
175172932161
186183031141
197193130130
207203129120
218213227110
229223226100
231123332590
241224332380
251325332270
261526332160
271726322050
281827321940
292027311740
302227311630

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2818light breeze
2918light breeze
3018light 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 6:02 AM to 6:24 AM, and sunset from 6:48 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:026:48
212.76:036:47
312.76:046:45
412.76:046:44
512.66:056:43
612.66:066:41
712.56:076:40
812.56:076:38
912.56:086:37
1012.46:096:35
1112.46:106:34
1212.46:106:32
1312.36:116:31
1412.36:126:29
1512.36:136:28
1612.26:136:26
1712.26:146:25
1812.16:156:23
1912.16:166:22
2012.16:166:20
2112.06:176:19
2212.06:186:17
2312.06:196:16
2411.96:196:14
2511.96:206:13
2611.86:216:11
2711.86:226:10
2811.86:226:08
2911.76:236:07
3011.76:246:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.23 kWh/m².

For context, solar energy here swings from a low near 2.66 kWh/m² to a high of 5.86 kWh/m² in May across the year — September's 4.23 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
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 Sinhyeon

In seasonPeak

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

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

Sinhyeon's rainy season runs April–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 Sinhyeon?

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

6.9
Sightseeing
2nd-best month of the year
5.8
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Sinhyeon for sightseeing.

What to pack for Sinhyeon in September

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

In September, Sinhyeon sees daytime highs around 24°C and nights near 21°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Sinhyeon in September

The nearest coast averages about 25°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 23 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 17 to Nov 5 — about 4.7 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Bracing
May17Cool
Jun20Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Sinhyeon in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sinhyeon peaks around August 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 20UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Sinhyeon 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 Sinhyeon is worst in March — around 68 µg/m³ PM2.5 (unhealthy), about 1.6× the cleanest month (August, 42 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorPoorMar 2168 µg/m³Aug 1942 µg/m³
PM2.5 (µg/m³)Level
Jan52Poor
Feb58Unhealthy
Mar68Unhealthy
Apr66Unhealthy
May65Unhealthy
Jun55Poor
Jul46Poor
Aug42Poor
Sep44Poor
Oct50Poor
Nov58Unhealthy
Dec48Poor
Location & terrain

Where is Sinhyeon?

Sinhyeon sits at 34.9°N, 128.6°E, 14 m above sea level, in South Korea. The nearest listed city is Kyosai, 5.0 km away.

ChangwonNaesŏBusanKimhae

Topography around Sinhyeon

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

Within 3 km, the terrain around Sinhyeon has significant variations in elevation — a maximum elevation change of 557 m around an average of 118 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 581 m; within 80 km, large variations in elevation — a maximum elevation change of 1,081 m.

The land around Sinhyeon is covered by trees (58%) and artificial surfaces (26%) within 3 km, water (52%) and trees (38%) within 16 km, and water (56%) and trees (33%) within 80 km.

3 km
557 m
16 km
581 m
80 km
1,081 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kyosai 5.0 km · Geoje 10 km · Tongyeong 19 km · Goseong 30 km · Changwon 39 km · Naesŏ 42 km · Busan 44 km · Kimhae 45 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 Sinhyeon (34.8825°, 128.6267°, 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).