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September weather forecast in Sanibel Island

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

	761 mmHg		81%
	6.1 m/s		+30

31 August, Sunday. day, 29°; night, 27°; rain

1 September, mon

	761 mmHg		80%
	6 m/s		+30

1 September, Monday. day, 29°; night, 27°; rain

2 September, tue

	761 mmHg		79%
	6 m/s		+30

2 September, Tuesday. day, 29°; night, 27°; overcast

3 September, wed

	761 mmHg		78%
	5.8 m/s		+31

3 September, Wednesday. day, 29°; night, 27°; partly cloudy

4 September, thu

	761 mmHg		78%
	5.8 m/s		+31

4 September, Thursday. day, 29°; night, 27°; partly cloudy

5 September, fri

	761 mmHg		79%
	6.6 m/s		+31

5 September, Friday. day, 29°; night, 27°; rain

6 September, sat

	761 mmHg		80%
	6.1 m/s		+30

6 September, Saturday. day, 28°; night, 27°; rain

7 September, sun

	761 mmHg		81%
	5.9 m/s		+30

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

8 September, mon

	760 mmHg		79%
	6 m/s		+30

8 September, Monday. day, 28°; night, 26°; rain

9 September, tue

	760 mmHg		80%
	6.3 m/s		+30

9 September, Tuesday. day, 28°; night, 26°; rain

10 September, wed

	760 mmHg		81%
	6.5 m/s		+30

10 September, Wednesday. day, 28°; night, 26°; rain

11 September, thu

	761 mmHg		80%
	6.4 m/s		+30

11 September, Thursday. day, 28°; night, 26°; rain

12 September, fri

	761 mmHg		80%
	6.5 m/s		+30

12 September, Friday. day, 28°; night, 26°; rain

13 September, sat

	761 mmHg		79%
	6.5 m/s		+30

13 September, Saturday. day, 29°; night, 26°; partly cloudy

14 September, sun

	760 mmHg		79%
	6.5 m/s		+30

14 September, Sunday. day, 29°; night, 26°; rain

15 September, mon

	761 mmHg		79%
	6.6 m/s		+30

15 September, Monday. day, 28°; night, 26°; clear

16 September, tue

	761 mmHg		79%
	5.9 m/s		+30

16 September, Tuesday. day, 28°; night, 27°; overcast

17 September, wed

	761 mmHg		79%
	5.9 m/s		+30

17 September, Wednesday. day, 28°; night, 26°; rain

18 September, thu

	761 mmHg		80%
	6 m/s		+30

18 September, Thursday. day, 28°; night, 26°; rain

19 September, fri

	760 mmHg		79%
	6 m/s		+30

19 September, Friday. day, 28°; night, 26°; rain

20 September, sat

	760 mmHg		80%
	6.4 m/s		+30

20 September, Saturday. day, 28°; night, 26°; rain

21 September, sun

	760 mmHg		78%
	6.6 m/s		+30

21 September, Sunday. day, 28°; night, 26°; clear

22 September, mon

	761 mmHg		79%
	6.4 m/s		+30

22 September, Monday. day, 28°; night, 26°; partly cloudy

23 September, tue

	761 mmHg		78%
	6.1 m/s		+30

23 September, Tuesday. day, 28°; night, 26°; clear

24 September, wed

	761 mmHg		78%
	6 m/s		+30

24 September, Wednesday. day, 28°; night, 26°; clear

25 September, thu

	760 mmHg		80%
	6.9 m/s		+30

25 September, Thursday. day, 28°; night, 26°; rain

26 September, fri

	760 mmHg		81%
	7.4 m/s		+30

26 September, Friday. day, 28°; night, 26°; rain

27 September, sat

	760 mmHg		81%
	7 m/s		+30

27 September, Saturday. day, 28°; night, 26°; rain

28 September, sun

	760 mmHg		81%
	6.4 m/s		+29

28 September, Sunday. day, 28°; night, 26°; clear

29 September, mon

	760 mmHg		79%
	6.6 m/s		+29

29 September, Monday. day, 28°; night, 26°; partly cloudy

30 September, tue

	760 mmHg		79%
	6.4 m/s		+29

30 September, Tuesday. day, 28°; night, 26°; clear

1 October, wed

	760 mmHg		77%
	6.7 m/s		+29

1 October, Wednesday. day, 28°; night, 26°; rain

2 October, thu

	760 mmHg		77%
	7.1 m/s		+29

2 October, Thursday. day, 28°; night, 25°; rain

3 October, fri

	761 mmHg		76%
	7.1 m/s		+29

3 October, Friday. day, 28°; night, 25°; partly cloudy

4 October, sat

	761 mmHg		78%
	7.6 m/s		+29

4 October, Saturday. day, 28°; night, 25°; rain

Average data for 10 years

Sanibel Island September

6

sunny days

17

days with precipitation

10

cloudy days

6 sunny days; 17 days with precipitation; 10 cloudy days;

79

%

air humidity

4.3

m/s

WindSE

168

mm of precipitation

(18% of annual average)

+30

°C

Water temperature

air humidity 79%; 168 millimeters of precipitation (18% of annual average); Wind south-easterly 4.3 Meters per second; Water temperature +30°

Weather graphs for September

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

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S

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SE

SE

SE

SE

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S

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SE

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SE

SE

SE

SE

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S

SE

SE

1

Average data for 10 years

2

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10

11

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29

30

Daytime temperature

Night-time temperature

Cities near you

Varadero
Havana
Miami
Orlando
Tampa
Miami Beach
Madeira Beach
Sarasota
St Petersburg

Cities with similar weather in September

Pattaya
Nha Trang
Sanya
Hurgada
Bangkok
Santo Domingo
Varadero
Havana
Hong Kong

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

In September, the weather in Sanibel Island is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Sanibel Island has 17 rainy, 6 sunny, 5 partly cloudy, and 2 cloudy days in September. The rains are usually heavy. September as well as June, July, and August is considered the most uncomfortable time to visit Sanibel Island.

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