Eisen weather in September

In September, Eisen sees average daytime highs of 25°C and overnight lows near 16°C, with 148 mm of rain across 9.7 wet days and about 12.2 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 25% 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 Eisen's 9th-clearest and 10th-windiest month. For the whole year in context, see Eisen's year-round climate.

Daytime high
25°
4th warmest
Overnight low
16°
9th coldest
Rainfall
148 mm
9.7 wet days
Daylight
12 h 12 min
6:12 AM – 6:25 PM
Cloud cover
64%
9th clearest
Wind
9 km/h
10th windiest
Solar energy
3.92 kWh/m²
Travel score
6.7
out of 10

Eisen 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 Eisen reaches about 25°C in the afternoon and slips back to 16°C overnight — a 8°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 5°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12719
22719
32719
42619
52619
62618
72618
82618
92618
102518
112517
122517
132517
142517
152516
162516
172416
182416
192416
202415
212415
222415
232315
242314
252314
262314
272314
282314
292313
302213

How September really feels in Eisen

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.

Eisen 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°263.81.69.80.0
Feb / -3°314.11.410.60.9
Mar12° / 647.31.611.73.5
Apr19° / 807.70.212.96.3
May24° / 12°937.7013.97.2
Jun26° / 17°1309.6014.46.4
Jul28° / 21°21514.8014.24.9
Aug29° / 22°20814.6013.44.9
Sep25° / 16°1489.7012.26.7
Oct20° / 604.9011.17.1
Nov13° / 384.70.110.14.2
Dec / -3°233.70.79.60.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% 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 59%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33664
43565
53565
63565
73664
83565
93664
103763
113763
123862
133862
143961
154060
164159
174258
184258
194357
204456
214555
224654
234654
244654
254654
264654
274753
284753
294753
304852

Chance of precipitation in September

Any precipitation

Eisen gets around 148 mm of rain over 9.7 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 32% 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
341
440
540
639
739
838
938
1037
1137
1236
1335
1434
1533
1632
1731
1830
1929
2028
2127
2227
2326
2426
2525
2625
2724
2824
2923
3022

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11133431201
22143531181
32153730161
43163829150
53173927140
64183926120
75194025110
85204024100
9621402390
10822402280
11924392170
121125392060
131326371860
141527361750
151728351650
161928341540
172129321440
182430311330
192630301130
202831281020
21303227920
22323226920
23343224810
24373223710
25393222610
26423220610
27443119510
28473018500
29492917400
30522816400

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 6:00 AM to 6:23 AM, and sunset from 6:48 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:006:48
212.86:016:47
312.76:026:45
412.76:026:44
512.66:036:42
612.66:046:41
712.66:056:39
812.56:066:38
912.56:066:36
1012.56:076:35
1112.46:086:33
1212.46:096:31
1312.36:096:30
1412.36:106:28
1512.36:116:27
1612.26:126:25
1712.26:136:24
1812.16:136:22
1912.16:146:21
2012.16:156:19
2112.06:166:18
2212.06:176:16
2312.06:176:15
2411.96:186:13
2511.96:196:11
2611.86:206:10
2711.86:216:08
2811.86:226:07
2911.76:226:05
3011.76:236:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.92 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 5.83 kWh/m² in May across the year — September's 3.92 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.0Bright
54.0Bright
64.0Bright
74.0Moderate
84.0Moderate
94.0Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Eisen

In seasonPeak

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

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

Eisen'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 Eisen?

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

6.7
Sightseeing
3rd-best month of the year
5.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Eisen for sightseeing.

What to pack for Eisen in September

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

In September, Eisen sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

Sea temperature near Eisen 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 60 km away) is warmest in August at about 24°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 28 to Oct 19 — about 3.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct20Refreshing
Nov17Cool
Dec15Bracing

UV index in Eisen in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Eisen peaks around August 15 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 highHighModerateAug 15UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr7High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Eisen 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 Eisen is worst in March — around 66 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (August, 34 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorPoorMar 1865 µg/m³Aug 1535 µg/m³
PM2.5 (µg/m³)Level
Jan51Poor
Feb57Unhealthy
Mar66Unhealthy
Apr60Unhealthy
May55Poor
Jun47Poor
Jul37Poor
Aug34Moderate
Sep39Poor
Oct47Poor
Nov56Unhealthy
Dec47Poor
Location & terrain

Where is Eisen?

Eisen sits at 36.0°N, 128.9°E, 85 m above sea level, in South Korea. The nearest listed city is Hayang, 12 km away.

YeonilPohangHeunghaeHwawŏn

Topography around Eisen

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

Within 3 km, the terrain around Eisen has only modest variations in elevation — a maximum elevation change of 201 m around an average of 101 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 643 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,395 m.

The land around Eisen is covered by trees (37%), artificial surfaces (26%) and cropland (25%) within 3 km, trees (63%) and cropland (20%) within 16 km, and trees (64%) within 80 km.

3 km
201 m
16 km
643 m
80 km
1,395 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hayang 12 km · Gyeongsan-si 24 km · Gyeongju 29 km · Daegu 32 km · Yeonil 35 km · Pohang 40 km · Heunghae 40 km · Hwawŏn 43 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 Eisen (35.9675°, 128.9308°, elevation 85 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).