Chinch'ŏn weather in September

In September, Chinch'ŏn sees average daytime highs of 26°C and overnight lows near 16°C, with 138 mm of rain across 8.5 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 32% 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 Chinch'ŏn's 9th-clearest and 12th-windiest month. For the whole year in context, see Chinch'ŏn's year-round climate.

Daytime high
26°
4th warmest
Overnight low
16°
9th coldest
Rainfall
138 mm
8.5 wet days
Daylight
12 h 12 min
6:18 AM – 6:31 PM
Cloud cover
59%
9th clearest
Wind
8 km/h
12th windiest
Solar energy
4.17 kWh/m²
Travel score
6.9
out of 10

Chinch'ŏn 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 27°C in the first days to 23°C by the end.

A typical September day in Chinch'ŏn reaches about 26°C in the afternoon and slips back to 16°C overnight — a 9°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°20°30°151015202530
Avg high (°C)Avg low (°C)
12820
22719
32719
42719
52719
62719
72718
82718
92718
102618
112617
122617
132617
142617
152617
162616
172516
182516
192516
202515
212515
222515
232415
242414
252414
262414
272414
282314
292313
302313

How September really feels in Chinch'ŏn

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.

Chinch'ŏn 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 / -6°234.52.59.80.0
Feb / -4°314.51.810.60.5
Mar12° / 506.71.611.73.3
Apr19° / 807.50.112.96.3
May24° / 12°907.7013.97.2
Jun28° / 18°1248.4014.56.4
Jul29° / 22°26016.2014.34.5
Aug30° / 22°22715.1013.44.6
Sep26° / 16°1388.5012.36.9
Oct20° / 584.90117.2
Nov12° / 446.60.4103.7
Dec / -4°244.61.89.50.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% 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 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24357
34258
44357
54456
64357
74456
84555
94456
104555
114555
124555
134753
144654
154753
164852
174951
185050
195050
205248
215248
225347
235347
245347
255347
265347
275446
285446
295446
305446

Chance of precipitation in September

Any precipitation

Chinch'ŏn gets around 138 mm of rain over 8.5 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 29% 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
439
538
637
736
835
934
1034
1133
1232
1331
1430
1529
1628
1727
1826
1925
2024
2124
2223
2323
2422
2522
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 30% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11123232211
22133431191
32143529181
43153728161
54163827150
64173926130
75184025120
86194124100
9820412390
10921412280
111122402170
121323391960
131524381850
141725371740
151927351640
162128331430
172429321330
182630301220
192831281120
203132261020
21333225910
22363323810
23383321710
24403320610
25433319510
26453217410
27483216400
28503115400
29533014300
30552913300

Wind in September

Winds average 8 km/h in September, the calmest month.

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.

0246810151015202530
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 6:05 AM to 6:30 AM, and sunset from 6:55 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:056:55
212.86:066:53
312.76:076:52
412.76:086:50
512.76:086:49
612.66:096:47
712.66:106:46
812.66:116:44
912.56:126:42
1012.56:136:41
1112.46:136:39
1212.46:146:38
1312.46:156:36
1412.36:166:35
1512.36:176:33
1612.26:186:31
1712.26:186:30
1812.26:196:28
1912.16:206:27
2012.16:216:25
2112.06:226:24
2212.06:236:22
2311.96:236:20
2411.96:246:19
2511.96:256:17
2611.86:266:16
2711.86:276:14
2811.76:286:13
2911.76:296:11
3011.76:306:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.17 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 5.85 kWh/m² in May across the year — September's 4.17 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.0Bright
294.0Bright
304.0Bright
Planning a trip in September

Hazard calendar for Chinch'ŏn

In seasonPeak

In September, Chinch'ŏn sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Chinch'ŏn's rainy season runs June–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Chinch'ŏn?

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

6.9
Sightseeing
3rd-best month of the year
6.3
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Chinch'ŏn for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Chinch'ŏn in September

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

In September, Chinch'ŏn sees daytime highs around 26°C and nights near 16°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Chinch'ŏn in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chinch'ŏn 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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 14UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7High
Jun7Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Chinch'ŏn 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 Chinch'ŏn is worst in March — around 80 µg/m³ PM2.5 (unhealthy), about 1.8× the cleanest month (July, 45 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1479 µg/m³Jul 2345 µg/m³
PM2.5 (µg/m³)Level
Jan69Unhealthy
Feb72Unhealthy
Mar80Unhealthy
Apr65Unhealthy
May58Unhealthy
Jun54Poor
Jul45Poor
Aug45Poor
Sep56Unhealthy
Oct67Unhealthy
Nov72Unhealthy
Dec65Unhealthy
Location & terrain

Where is Chinch'ŏn?

Chinch'ŏn sits at 36.9°N, 127.4°E, 69 m above sea level, in South Korea. The nearest listed city is Jungpyong, 15 km away.

Pyeongtaek

Topography around Chinch'ŏn

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

Within 3 km, the terrain around Chinch'ŏn has significant variations in elevation — a maximum elevation change of 344 m around an average of 99 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 574 m; within 80 km, large variations in elevation — a maximum elevation change of 1,197 m.

The land around Chinch'ŏn is covered by trees (35%), cropland (35%) and artificial surfaces (23%) within 3 km, trees (58%) and cropland (23%) within 16 km, and trees (65%) within 80 km.

3 km
344 m
16 km
574 m
80 km
1,197 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Jungpyong 15 km · Anseong 23 km · Cheongju-si 25 km · Cheonan 27 km · Seonghwan 29 km · Koesan 32 km · Sejong 32 km · Pyeongtaek 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 Chinch'ŏn (36.8567°, 127.4433°, elevation 69 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. 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).