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September weather forecast in Yamaguchi

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

	738 mmHg		75%
	5.1 m/s		+27

31 August, Sunday. day, 30°; night, 24°; rain

1 September, mon

	739 mmHg		75%
	4.3 m/s		+27

1 September, Monday. day, 29°; night, 23°; rain

2 September, tue

	739 mmHg		75%
	4.5 m/s		+26

2 September, Tuesday. day, 30°; night, 23°; rain

3 September, wed

	739 mmHg		76%
	4.19 m/s		+26

3 September, Wednesday. day, 29°; night, 23°; rain

4 September, thu

	739 mmHg		73%
	4.19 m/s		+26

4 September, Thursday. day, 30°; night, 23°; partly cloudy

5 September, fri

	738 mmHg		76%
	4.69 m/s		+26

5 September, Friday. day, 29°; night, 23°; rain

6 September, sat

	737 mmHg		77%
	5.4 m/s		+26

6 September, Saturday. day, 29°; night, 23°; rain

7 September, sun

	738 mmHg		76%
	5.3 m/s		+26

7 September, Sunday. day, 29°; night, 23°; clear

8 September, mon

	740 mmHg		75%
	4 m/s		+26

8 September, Monday. day, 29°; night, 22°; clear

9 September, tue

	740 mmHg		75%
	3.8 m/s		+26

9 September, Tuesday. day, 29°; night, 22°; clear

10 September, wed

	740 mmHg		74%
	4 m/s		+26

10 September, Wednesday. day, 29°; night, 22°; partly cloudy

11 September, thu

	740 mmHg		73%
	4.1 m/s		+26

11 September, Thursday. day, 29°; night, 22°; partly cloudy

12 September, fri

	741 mmHg		76%
	4.19 m/s		+26

12 September, Friday. day, 29°; night, 22°; overcast

13 September, sat

	741 mmHg		74%
	3.8 m/s		+26

13 September, Saturday. day, 29°; night, 22°; rain

14 September, sun

	740 mmHg		75%
	4 m/s		+26

14 September, Sunday. day, 29°; night, 22°; rain

15 September, mon

	740 mmHg		74%
	4.8 m/s		+26

15 September, Monday. day, 28°; night, 22°; rain

16 September, tue

	739 mmHg		75%
	5.3 m/s		+26

16 September, Tuesday. day, 28°; night, 22°; rain

17 September, wed

	739 mmHg		74%
	5.2 m/s		+25

17 September, Wednesday. day, 28°; night, 21°; rain

18 September, thu

	740 mmHg		71%
	4.69 m/s		+25

18 September, Thursday. day, 28°; night, 21°; clear

19 September, fri

	740 mmHg		72%
	4.9 m/s		+25

19 September, Friday. day, 28°; night, 20°; clear

20 September, sat

	740 mmHg		73%
	4.9 m/s		+25

20 September, Saturday. day, 27°; night, 20°; partly cloudy

21 September, sun

	740 mmHg		73%
	4.6 m/s		+25

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

22 September, mon

	741 mmHg		74%
	4.6 m/s		+25

22 September, Monday. day, 26°; night, 20°; partly cloudy

23 September, tue

	742 mmHg		72%
	4.69 m/s		+25

23 September, Tuesday. day, 26°; night, 19°; clear

24 September, wed

	742 mmHg		74%
	4.1 m/s		+25

24 September, Wednesday. day, 26°; night, 19°; clear

25 September, thu

	742 mmHg		73%
	4 m/s		+25

25 September, Thursday. day, 27°; night, 20°; partly cloudy

26 September, fri

	742 mmHg		71%
	4 m/s		+24

26 September, Friday. day, 27°; night, 19°; clear

27 September, sat

	742 mmHg		72%
	4.3 m/s		+24

27 September, Saturday. day, 26°; night, 19°; clear

28 September, sun

	742 mmHg		71%
	4.1 m/s		+24

28 September, Sunday. day, 26°; night, 19°; partly cloudy

29 September, mon

	742 mmHg		74%
	4 m/s		+24

29 September, Monday. day, 25°; night, 19°; rain

30 September, tue

	741 mmHg		77%
	4.3 m/s		+24

30 September, Tuesday. day, 25°; night, 19°; rain

1 October, wed

	741 mmHg		72%
	4.8 m/s		+24

1 October, Wednesday. day, 26°; night, 19°; rain

2 October, thu

	742 mmHg		74%
	4.69 m/s		+24

2 October, Thursday. day, 25°; night, 18°; rain

3 October, fri

	742 mmHg		70%
	4.4 m/s		+24

3 October, Friday. day, 26°; night, 18°; partly cloudy

4 October, sat

	743 mmHg		69%
	4.5 m/s		+24

4 October, Saturday. day, 25°; night, 18°; rain

Average data for 10 years

Yamaguchi September

9

sunny days

12

days with precipitation

9

cloudy days

9 sunny days; 12 days with precipitation; 9 cloudy days;

74

%

air humidity

2.9

m/s

WindSE

187

mm of precipitation

(12% of annual average)

+25

°C

Water temperature

air humidity 74%; 187 millimeters of precipitation (12% of annual average); Wind south-easterly 2.9 Meters per second; Water temperature +25°

Weather graphs for September

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

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E

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SE

1

Average data for 10 years

2

3

4

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9

10

11

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13

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20

21

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29

30

Daytime temperature

Night-time temperature

Cities near you

Busan
Fukuoka
Hiroshima
Miyazaki
Geoje
Ulsan
Kagoshima
Kumamoto
Wakayama

Cities with similar weather in September

Yerevan
Ankara
Bishkek
Tiraspol
Podgorica
Comrat
Bender
Ciadir-Lunga
Boston

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

In September, the weather in Yamaguchi is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Yamaguchi has 12 rainy, 9 sunny, 7 partly cloudy, and 2 cloudy days in September. The rains are usually heavy.

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