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September weather forecast in Seosan

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

31 August, sun

	757 mmHg		82%
	6.5 m/s		+25

31 August, Sunday. day, 24°; night, 22°; clear

1 September, mon

	757 mmHg		83%
	6.5 m/s		+24

1 September, Monday. day, 24°; night, 22°; rain

2 September, tue

	758 mmHg		82%
	6.3 m/s		+24

2 September, Tuesday. day, 24°; night, 22°; rain

3 September, wed

	758 mmHg		81%
	5.5 m/s		+25

3 September, Wednesday. day, 24°; night, 22°; rain

4 September, thu

	758 mmHg		81%
	5.8 m/s		+24

4 September, Thursday. day, 24°; night, 22°; overcast

5 September, fri

	758 mmHg		80%
	6.2 m/s		+24

5 September, Friday. day, 24°; night, 22°; rain

6 September, sat

	757 mmHg		80%
	6.7 m/s		+24

6 September, Saturday. day, 23°; night, 22°; rain

7 September, sun

	758 mmHg		79%
	6.8 m/s		+24

7 September, Sunday. day, 23°; night, 22°; clear

8 September, mon

	759 mmHg		80%
	5.2 m/s		+24

8 September, Monday. day, 23°; night, 22°; clear

9 September, tue

	759 mmHg		81%
	5.4 m/s		+24

9 September, Tuesday. day, 23°; night, 22°; partly cloudy

10 September, wed

	760 mmHg		81%
	5.6 m/s		+24

10 September, Wednesday. day, 23°; night, 21°; partly cloudy

11 September, thu

	760 mmHg		80%
	5.5 m/s		+23

11 September, Thursday. day, 23°; night, 21°; overcast

12 September, fri

	760 mmHg		79%
	6 m/s		+23

12 September, Friday. day, 23°; night, 21°; overcast

13 September, sat

	760 mmHg		79%
	5.9 m/s		+23

13 September, Saturday. day, 23°; night, 21°; partly cloudy

14 September, sun

	760 mmHg		79%
	6.1 m/s		+23

14 September, Sunday. day, 23°; night, 21°; partly cloudy

15 September, mon

	760 mmHg		78%
	6.6 m/s		+23

15 September, Monday. day, 23°; night, 21°; clear

16 September, tue

	759 mmHg		78%
	6.6 m/s		+23

16 September, Tuesday. day, 23°; night, 21°; rain

17 September, wed

	759 mmHg		76%
	6.5 m/s		+23

17 September, Wednesday. day, 23°; night, 21°; clear

18 September, thu

	760 mmHg		76%
	6.4 m/s		+23

18 September, Thursday. day, 23°; night, 21°; clear

19 September, fri

	760 mmHg		75%
	6.6 m/s		+23

19 September, Friday. day, 23°; night, 21°; partly cloudy

20 September, sat

	760 mmHg		74%
	7.1 m/s		+22

20 September, Saturday. day, 22°; night, 20°; rain

21 September, sun

	761 mmHg		72%
	6.7 m/s		+22

21 September, Sunday. day, 21°; night, 19°; clear

22 September, mon

	762 mmHg		72%
	6.2 m/s		+22

22 September, Monday. day, 22°; night, 20°; clear

23 September, tue

	762 mmHg		73%
	5.8 m/s		+22

23 September, Tuesday. day, 22°; night, 20°; clear

24 September, wed

	762 mmHg		74%
	5.4 m/s		+22

24 September, Wednesday. day, 22°; night, 20°; clear

25 September, thu

	763 mmHg		73%
	5.4 m/s		+22

25 September, Thursday. day, 21°; night, 19°; partly cloudy

26 September, fri

	763 mmHg		75%
	5.7 m/s		+22

26 September, Friday. day, 21°; night, 19°; partly cloudy

27 September, sat

	762 mmHg		74%
	5.9 m/s		+22

27 September, Saturday. day, 21°; night, 20°; overcast

28 September, sun

	762 mmHg		72%
	6.2 m/s		+22

28 September, Sunday. day, 21°; night, 19°; overcast

29 September, mon

	762 mmHg		74%
	6.1 m/s		+22

29 September, Monday. day, 21°; night, 19°; rain

30 September, tue

	761 mmHg		76%
	6.2 m/s		+21

30 September, Tuesday. day, 21°; night, 19°; clear

1 October, wed

	761 mmHg		74%
	7 m/s		+21

1 October, Wednesday. day, 21°; night, 19°; rain

2 October, thu

	762 mmHg		70%
	7.5 m/s		+21

2 October, Thursday. day, 20°; night, 18°; rain

3 October, fri

	763 mmHg		68%
	6.8 m/s		+21

3 October, Friday. day, 20°; night, 18°; rain

4 October, sat

	764 mmHg		66%
	6.8 m/s		+21

4 October, Saturday. day, 19°; night, 17°; overcast

Average data for 10 years

Seosan September

10

sunny days

8

days with precipitation

7

cloudy days

10 sunny days; 8 days with precipitation; 7 cloudy days;

77

%

air humidity

4.19

m/s

WindS

131

mm of precipitation

(12% of annual average)

+23

°C

Water temperature

air humidity 77%; 131 millimeters of precipitation (12% of annual average); Wind southerly 4.19 Meters per second; Water temperature +23°

Weather graphs for September

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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S

S

S

S

SW

S

S

S

S

S

S

S

S

S

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S

S

SE

SE

S

S

S

S

S

S

S

S

1

Average data for 10 years

2

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7

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10

11

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14

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30

Daytime temperature

Night-time temperature

Cities near you

Seoul
Busan
Pyongyang
Jeju
Incheon
Wonsan
Geoje
Ansan
Ulsan

Cities with similar weather in September

Kemer
Barcelona
Rome
Baku
Batumi
Budva
Heraklion
Venice
Thessaloniki

The weather forecast for September 2025 is based on historical data from the past 10 years.

In September, the weather in Seosan is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, Seosan has 10 sunny, 8 rainy, 7 partly cloudy, and 5 cloudy days in September. The rains are usually heavy. September as well as October is considered the most comfortable time to visit Seosan.

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