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September weather forecast in Kailua-Kona

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

	718 mmHg		83%
	3.4 m/s		+27

31 August, Sunday. day, 25°; night, 22°; rain

1 September, mon

	717 mmHg		84%
	3.4 m/s		+27

1 September, Monday. day, 25°; night, 22°; rain

2 September, tue

	717 mmHg		84%
	3.5 m/s		+27

2 September, Tuesday. day, 25°; night, 22°; rain

3 September, wed

	717 mmHg		84%
	3.5 m/s		+27

3 September, Wednesday. day, 24°; night, 21°; rain

4 September, thu

	717 mmHg		83%
	3.4 m/s		+27

4 September, Thursday. day, 24°; night, 21°; rain

5 September, fri

	717 mmHg		83%
	3.5 m/s		+27

5 September, Friday. day, 24°; night, 21°; rain

6 September, sat

	718 mmHg		82%
	3.3 m/s		+27

6 September, Saturday. day, 24°; night, 22°; rain

7 September, sun

	718 mmHg		82%
	3.4 m/s		+27

7 September, Sunday. day, 24°; night, 22°; rain

8 September, mon

	718 mmHg		84%
	3.4 m/s		+27

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

9 September, tue

	717 mmHg		84%
	3.4 m/s		+27

9 September, Tuesday. day, 24°; night, 21°; rain

10 September, wed

	717 mmHg		83%
	3.1 m/s		+27

10 September, Wednesday. day, 24°; night, 21°; rain

11 September, thu

	718 mmHg		83%
	3.3 m/s		+27

11 September, Thursday. day, 24°; night, 22°; rain

12 September, fri

	718 mmHg		84%
	3.3 m/s		+27

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

13 September, sat

	717 mmHg		84%
	3.1 m/s		+27

13 September, Saturday. day, 24°; night, 22°; overcast

14 September, sun

	717 mmHg		84%
	3.1 m/s		+27

14 September, Sunday. day, 24°; night, 22°; rain

15 September, mon

	718 mmHg		84%
	3.3 m/s		+27

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

16 September, tue

	718 mmHg		84%
	3.3 m/s		+27

16 September, Tuesday. day, 25°; night, 22°; rain

17 September, wed

	718 mmHg		85%
	3.8 m/s		+27

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

18 September, thu

	718 mmHg		85%
	3.6 m/s		+27

18 September, Thursday. day, 24°; night, 21°; rain

19 September, fri

	717 mmHg		83%
	3.5 m/s		+27

19 September, Friday. day, 24°; night, 21°; rain

20 September, sat

	717 mmHg		84%
	3.4 m/s		+27

20 September, Saturday. day, 24°; night, 22°; rain

21 September, sun

	717 mmHg		84%
	3.2 m/s		+27

21 September, Sunday. day, 24°; night, 21°; rain

22 September, mon

	717 mmHg		84%
	3.3 m/s		+27

22 September, Monday. day, 24°; night, 21°; rain

23 September, tue

	717 mmHg		84%
	3.3 m/s		+27

23 September, Tuesday. day, 24°; night, 21°; rain

24 September, wed

	717 mmHg		84%
	3.4 m/s		+27

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

25 September, thu

	717 mmHg		84%
	3.4 m/s		+27

25 September, Thursday. day, 24°; night, 21°; rain

26 September, fri

	717 mmHg		83%
	3.4 m/s		+27

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

27 September, sat

	717 mmHg		84%
	3.4 m/s		+27

27 September, Saturday. day, 24°; night, 22°; rain

28 September, sun

	718 mmHg		84%
	3.2 m/s		+27

28 September, Sunday. day, 24°; night, 21°; rain

29 September, mon

	718 mmHg		84%
	3.1 m/s		+27

29 September, Monday. day, 24°; night, 21°; rain

30 September, tue

	717 mmHg		82%
	3.2 m/s		+27

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

1 October, wed

	717 mmHg		83%
	3 m/s		+27

1 October, Wednesday. day, 24°; night, 22°; rain

2 October, thu

	717 mmHg		84%
	3.2 m/s		+27

2 October, Thursday. day, 24°; night, 22°; rain

3 October, fri

	717 mmHg		84%
	3.3 m/s		+27

3 October, Friday. day, 24°; night, 22°; rain

4 October, sat

	717 mmHg		84%
	3.3 m/s		+27

4 October, Saturday. day, 24°; night, 22°; rain

Average data for 10 years

Kailua-Kona September

0

sunny days

29

days with precipitation

6

cloudy days

0 sunny days; 29 days with precipitation; 6 cloudy days;

84

%

air humidity

1.8

m/s

WindSW

336

mm of precipitation

(11% of annual average)

+27

°C

Water temperature

air humidity 84%; 336 millimeters of precipitation (11% of annual average); Wind south-westerly 1.8 Meters per second; Water temperature +27°

Weather graphs for September

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

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

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

25

26

27

28

29

30

Daytime temperature

Night-time temperature

Cities near you

Honolulu
Koloa
Mataiva
Waikoloa
Nuku Hiva
Hilo
Hana
Wailea
Kihei

Cities with similar weather in September

Tel Aviv
Jerba
Aqaba
Goa
Eylat
Male
Haifa
Zanzibar
Netanya

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

In September, the weather in Kailua-Kona is typically warm. Average daily high temperature in September is about 24 degrees above zero. On average, Kailua-Kona has 29 rainy and 1 cloudy day in September. The rains are usually heavy. September as well as January, February, March, and April is considered the most uncomfortable time to visit Kailua-Kona.

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