World Resorts USA Key West

Key West Monthly Weather Averages

Please click on any column to get detailed information about Key West weather in that particular month. You will get daily weather information for that month for the last several years.

Day & Night air temperature, °F

The warmest month in Key West is august. The average daily temp is 86.8°F. The average nightly temp is 83.6°F.

Sea water temperature, °F

The warmest sea temperature usually observed in August. Average daily sea water temperature during this month is 87.0°F.

Precipitation total, in.

March is the month with least precipitations during the year. The average precipitation totals for this month is 0.7 in. The month with most precipitation total is September.

Number of rainy days

This chart shows averages for the last three years. It shows medium and heavy rains only, it doesn't show light rains.

Wind speed, mph
Sunny, partly cloudy and cloudy days
Average sunny hours

Sunny hours are calculated based on the average daily number of hours while sunlight can reach the ground. It depends on day length and cloudiness during the day.

* Charts above show average data for the last 3 years.

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 15 mph
Feels like: +66°F
Precip.: 0%
Places in USA:
Name
°F
+14°F
+23°F
+75°F
+75°F
+50°F
+54°F
+61°F
+19°F
+50°F
+54°F
+54°F
+48°F
+46°F
+46°F
+23°F
24 Hours Forecast
Key West
Local time: 04:36
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