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September weather forecast in Kapa'a

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

	732 mmHg		78%
	6.1 m/s		+26

31 August, Sunday. day, 26°; night, 24°; clear

1 September, mon

	732 mmHg		78%
	6.2 m/s		+26

1 September, Monday. day, 26°; night, 24°; rain

2 September, tue

	732 mmHg		78%
	6.1 m/s		+26

2 September, Tuesday. day, 26°; night, 24°; rain

3 September, wed

	732 mmHg		78%
	5.8 m/s		+26

3 September, Wednesday. day, 26°; night, 24°; rain

4 September, thu

	732 mmHg		79%
	5.7 m/s		+26

4 September, Thursday. day, 26°; night, 23°; rain

5 September, fri

	732 mmHg		78%
	5.6 m/s		+26

5 September, Friday. day, 26°; night, 24°; rain

6 September, sat

	732 mmHg		77%
	5.6 m/s		+26

6 September, Saturday. day, 26°; night, 24°; clear

7 September, sun

	732 mmHg		78%
	5.7 m/s		+26

7 September, Sunday. day, 26°; night, 24°; clear

8 September, mon

	732 mmHg		78%
	5.9 m/s		+26

8 September, Monday. day, 26°; night, 24°; rain

9 September, tue

	732 mmHg		78%
	5.8 m/s		+26

9 September, Tuesday. day, 26°; night, 24°; clear

10 September, wed

	732 mmHg		78%
	5.6 m/s		+27

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

11 September, thu

	732 mmHg		77%
	5.4 m/s		+27

11 September, Thursday. day, 26°; night, 24°; partly cloudy

12 September, fri

	732 mmHg		77%
	5.5 m/s		+27

12 September, Friday. day, 26°; night, 24°; clear

13 September, sat

	732 mmHg		78%
	5.6 m/s		+27

13 September, Saturday. day, 26°; night, 24°; rain

14 September, sun

	732 mmHg		78%
	5.6 m/s		+27

14 September, Sunday. day, 26°; night, 24°; rain

15 September, mon

	732 mmHg		79%
	5.6 m/s		+27

15 September, Monday. day, 26°; night, 23°; rain

16 September, tue

	732 mmHg		78%
	6 m/s		+26

16 September, Tuesday. day, 26°; night, 24°; partly cloudy

17 September, wed

	732 mmHg		78%
	6.1 m/s		+26

17 September, Wednesday. day, 26°; night, 24°; overcast

18 September, thu

	732 mmHg		79%
	6.2 m/s		+26

18 September, Thursday. day, 26°; night, 24°; rain

19 September, fri

	732 mmHg		77%
	6 m/s		+26

19 September, Friday. day, 26°; night, 24°; partly cloudy

20 September, sat

	732 mmHg		78%
	5.7 m/s		+26

20 September, Saturday. day, 26°; night, 24°; partly cloudy

21 September, sun

	732 mmHg		79%
	5.6 m/s		+26

21 September, Sunday. day, 26°; night, 24°; clear

22 September, mon

	732 mmHg		78%
	5.6 m/s		+26

22 September, Monday. day, 26°; night, 24°; clear

23 September, tue

	731 mmHg		77%
	5.5 m/s		+26

23 September, Tuesday. day, 26°; night, 24°; clear

24 September, wed

	731 mmHg		78%
	5.6 m/s		+26

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

25 September, thu

	732 mmHg		78%
	5.5 m/s		+26

25 September, Thursday. day, 26°; night, 24°; clear

26 September, fri

	732 mmHg		79%
	5.5 m/s		+26

26 September, Friday. day, 26°; night, 24°; rain

27 September, sat

	732 mmHg		78%
	5.6 m/s		+26

27 September, Saturday. day, 26°; night, 24°; rain

28 September, sun

	732 mmHg		77%
	5.8 m/s		+26

28 September, Sunday. day, 26°; night, 24°; rain

29 September, mon

	732 mmHg		77%
	5.7 m/s		+26

29 September, Monday. day, 26°; night, 24°; clear

30 September, tue

	732 mmHg		79%
	5.7 m/s		+26

30 September, Tuesday. day, 26°; night, 24°; rain

1 October, wed

	731 mmHg		79%
	5.6 m/s		+26

1 October, Wednesday. day, 26°; night, 23°; rain

2 October, thu

	731 mmHg		79%
	5.8 m/s		+26

2 October, Thursday. day, 26°; night, 23°; overcast

3 October, fri

	731 mmHg		79%
	5.8 m/s		+26

3 October, Friday. day, 26°; night, 24°; rain

4 October, sat

	732 mmHg		78%
	5.8 m/s		+26

4 October, Saturday. day, 26°; night, 24°; partly cloudy

Average data for 10 years

Kapa'a September

11

sunny days

14

days with precipitation

1

cloudy day

11 sunny days; 14 days with precipitation; 1 cloudy day;

78

%

air humidity

4.8

m/s

WindE

41

mm of precipitation

(6% of annual average)

+26

°C

Water temperature

air humidity 78%; 41 millimeters of precipitation (6% of annual average); Wind easterly 4.8 Meters per second; Water temperature +26°

Weather graphs for September

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

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

E

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

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26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Honolulu
Akutan
Koloa
Kailua-Kona
Waikoloa
Cold Bay
Dutch Harbor
Lihue
Kamuela

Cities with similar weather in September

Paphos
Limassol
Hammamet
Bodrum
Majorca
Valletta
Torrevieja
Alexandria
Agadir

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

In September, the weather in Kapa'a is typically warm. Average daily high temperature in September is about 26 degrees above zero. On average, Kapa'a has 14 rainy, 11 sunny, 4 partly cloudy, and 1 cloudy day in September. The rains are usually light. September as well as March, April, June, and July is considered the most uncomfortable time to visit Kapa'a.

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