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August weather forecast in Key West

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

27 July, sun

	763 mmHg		78%
	6.4 m/s		+30

27 July, Sunday. day, 29°; night, 27°; rain

28 July, mon

	763 mmHg		77%
	5.6 m/s		+30

28 July, Monday. day, 29°; night, 28°; partly cloudy

29 July, tue

	763 mmHg		78%
	5.5 m/s		+30

29 July, Tuesday. day, 29°; night, 27°; rain

30 July, wed

	763 mmHg		77%
	5.8 m/s		+30

30 July, Wednesday. day, 29°; night, 28°; partly cloudy

31 July, thu

	762 mmHg		77%
	6.1 m/s		+30

31 July, Thursday. day, 29°; night, 28°; partly cloudy

1 August, fri

	762 mmHg		77%
	6.2 m/s		+30

1 August, Friday. day, 29°; night, 28°; clear

2 August, sat

	762 mmHg		77%
	5.9 m/s		+30

2 August, Saturday. day, 29°; night, 28°; partly cloudy

3 August, sun

	762 mmHg		79%
	6.1 m/s		+30

3 August, Sunday. day, 29°; night, 28°; overcast

4 August, mon

	762 mmHg		79%
	6.1 m/s		+30

4 August, Monday. day, 29°; night, 27°; overcast

5 August, tue

	762 mmHg		78%
	6.2 m/s		+30

5 August, Tuesday. day, 29°; night, 28°; rain

6 August, wed

	762 mmHg		78%
	6.4 m/s		+30

6 August, Wednesday. day, 29°; night, 28°; partly cloudy

7 August, thu

	762 mmHg		78%
	6 m/s		+30

7 August, Thursday. day, 29°; night, 28°; partly cloudy

8 August, fri

	762 mmHg		78%
	6.2 m/s		+30

8 August, Friday. day, 29°; night, 28°; partly cloudy

9 August, sat

	762 mmHg		78%
	5.9 m/s		+30

9 August, Saturday. day, 29°; night, 28°; partly cloudy

10 August, sun

	762 mmHg		77%
	5.6 m/s		+30

10 August, Sunday. day, 29°; night, 28°; clear

11 August, mon

	762 mmHg		77%
	5.3 m/s		+30

11 August, Monday. day, 29°; night, 28°; clear

12 August, tue

	762 mmHg		77%
	5.1 m/s		+30

12 August, Tuesday. day, 29°; night, 28°; clear

13 August, wed

	762 mmHg		76%
	5.7 m/s		+30

13 August, Wednesday. day, 29°; night, 28°; clear

14 August, thu

	762 mmHg		77%
	5.5 m/s		+30

14 August, Thursday. day, 29°; night, 28°; clear

15 August, fri

	762 mmHg		78%
	5.7 m/s		+30

15 August, Friday. day, 29°; night, 28°; rain

16 August, sat

	762 mmHg		78%
	5.8 m/s		+30

16 August, Saturday. day, 29°; night, 28°; rain

17 August, sun

	762 mmHg		77%
	6.1 m/s		+30

17 August, Sunday. day, 29°; night, 28°; rain

18 August, mon

	762 mmHg		77%
	6.4 m/s		+30

18 August, Monday. day, 29°; night, 28°; rain

19 August, tue

	762 mmHg		79%
	6.6 m/s		+30

19 August, Tuesday. day, 29°; night, 28°; rain

20 August, wed

	762 mmHg		79%
	6.5 m/s		+30

20 August, Wednesday. day, 29°; night, 28°; rain

21 August, thu

	762 mmHg		79%
	6.4 m/s		+30

21 August, Thursday. day, 29°; night, 28°; rain

22 August, fri

	762 mmHg		79%
	6.3 m/s		+30

22 August, Friday. day, 29°; night, 28°; rain

23 August, sat

	761 mmHg		79%
	5.8 m/s		+30

23 August, Saturday. day, 29°; night, 27°; rain

24 August, sun

	761 mmHg		78%
	6.2 m/s		+30

24 August, Sunday. day, 29°; night, 28°; rain

25 August, mon

	761 mmHg		79%
	6.8 m/s		+30

25 August, Monday. day, 29°; night, 28°; rain

26 August, tue

	760 mmHg		79%
	7.2 m/s		+30

26 August, Tuesday. day, 29°; night, 28°; rain

27 August, wed

	760 mmHg		79%
	7.1 m/s		+30

27 August, Wednesday. day, 29°; night, 28°; rain

28 August, thu

	760 mmHg		79%
	6.8 m/s		+30

28 August, Thursday. day, 29°; night, 27°; rain

29 August, fri

	760 mmHg		80%
	6.9 m/s		+30

29 August, Friday. day, 29°; night, 27°; rain

30 August, sat

	760 mmHg		80%
	7.1 m/s		+30

30 August, Saturday. day, 28°; night, 27°; rain

31 August, sun

	761 mmHg		80%
	6.6 m/s		+30

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

1 September, mon

	761 mmHg		79%
	6.2 m/s		+30

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

2 September, tue

	761 mmHg		79%
	6.2 m/s		+30

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

3 September, wed

	761 mmHg		79%
	5.8 m/s		+30

3 September, Wednesday. day, 29°; night, 27°; clear

4 September, thu

	760 mmHg		78%
	5.9 m/s		+30

4 September, Thursday. day, 29°; night, 27°; rain

5 September, fri

	761 mmHg		79%
	6.2 m/s		+30

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

Average data for 10 years

Key West August

6

sunny days

18

days with precipitation

9

cloudy days

6 sunny days; 18 days with precipitation; 9 cloudy days;

78

%

air humidity

4.5

m/s

WindSE

125

mm of precipitation

(15% of annual average)

+30

°C

Water temperature

air humidity 78%; 125 millimeters of precipitation (15% of annual average); Wind south-easterly 4.5 Meters per second; Water temperature +30°

Weather graphs for August

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

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SE

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SE

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SE

SE

SE

SE

SE

SE

1

Average data for 10 years

2

3

4

5

6

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10

11

12

13

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15

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31

Daytime temperature

Night-time temperature

Cities near you

Varadero
Havana
Miami
Cayo Coco
Tampa
Cayo Guillermo
Miami Beach
Madeira Beach
Sarasota

Cities with similar weather in August

Antalya
Alanya
Side
Belek
Nha Trang
Ayia Napa
Larnaca
Protaras
Fethiye

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

August in Key West is the hottest month of the year. In August, the weather in Key West is typically hot. Average daily high temperature in August is about 29 degrees above zero. On average, Key West has 18 rainy, 6 sunny, 5 partly cloudy, and 2 cloudy days in August. The rains are usually heavy. August as well as June, July, and September is considered the most uncomfortable time to visit Key West.

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