World Resorts USA Key West Weather

Key West weather in August

Weather in Key West: August

Average day temperature: 87.5°F
Average night temperature: 83.1°F
Sea water temperature: 87.0°F
Number of sunny days: 10 days
Day length: 12.6 - 13.3 hours
Number of rainy days: 7 days
Precipitation totals: 4.2 in.

Air temperature in August, °F

Show year:
2024
2023
2022

The highest day temperature during August of 2024 was 87°F. At the same time the lowest night temperature was 83°F. Day and night temperature averages during August were 85.4°F and 85.2°F.

Sea water temperature in Key West in August, °F

Show year:
2024
2023
2022

The average sea water temperature in August of 2024 was 87.8°F. The highest and lowest sea temperatures during the month were 89.2°F and 86.2°F.

Sunny, partly cloudy and cloudy days

Mostly all days in August are partly cloudy but sunny or cloudy days are also possible.

Precipitation total in August, in.

Precipitation total value in Key West in August is 4.6 in. Other months of the year show relatively similar values.

Wind speed in August, mph

The average wind speed value in August is 10.5 mph It makes August one of the least windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 7.0.

Best time for vacation in Key West

Sunniest months:
March 16 days
April 16 days
May 16 days
Warmest months:
August 87.5 °F
July 87.0 °F
September 85.8 °F
Warmest sea temp:
August 87.0 °F
July 86.5 °F
September 86.0 °F
Coldest months:
January 72.4 °F
February 74.0 °F
December 75.7 °F
Rainiest months:
August 7 days
July 7 days
September 7 days
Windiest months:
November 14.7 mph
December 13.7 mph
March 13.7 mph

Key West on a weather map

Key West
+66°F
S 13 mph
Feels like: +66°F
Precip.: 0%
Places in USA:
Name
°F
+16°F
+25°F
+75°F
+75°F
+54°F
+54°F
+63°F
+21°F
+52°F
+54°F
+54°F
+50°F
+48°F
+46°F
+23°F
24 Hours Forecast
Key West
Local time: 04:22
December 22, sunday
0600
66°F
S
15 mph
0900
64°F
S
14 mph
1200
68°F
SW
11 mph
1500
68°F
S
12 mph
1800
70°F
S
11 mph
2100
68°F
S
12 mph
December 23, monday
0000
70°F
SW
10 mph
0300
70°F
SW
15 mph
Units of measurement: °C / °F