World Resorts USA Key West Weather

Autumn weather in Key West

Weather in Key West in Autumn

September October November
Average day temperature:
Average day temperature: 85.8°F 82.8°F 78.2°F
Average night temperature:
Average night temperature: 82.5°F 79.5°F 74.7°F
Sea water temperature:
Sea water temperature: 86.1°F 83.1°F 78.8°F
Number of sunny days:
Number of sunny days: 11 days 12 days 13 days
Day length:
Day length: 11.9 - 12.6 h. 11.2 - 11.9 h. 10.7 - 11.2 h.
Number of rainy days:
Number of rainy days: 6 days 5 days 2 days
Precipitation totals:
Precipitation totals: 4.7 in. 3.6 in. 1.5 in.

Day & Night air temperature, °F

Sea water temperature, °F

Precipitation total, in.

Sunny, partly cloudy and cloudy days
Wind speed, mph
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.

Best time for vacation in Key West

Sunniest months:
May 16 days
March 16 days
April 16 days
Warmest months:
August 87.4 °F
July 86.9 °F
September 85.8 °F
Warmest sea temp:
August 87.2 °F
July 86.6 °F
September 86.1 °F
Coldest months:
January 72.1 °F
February 74.0 °F
December 75.4 °F
Rainiest months:
June 7 days
August 7 days
September 6 days
Windiest months:
November 14.7 mph
December 13.9 mph
January 13.8 mph

Key West on a weather map

Key West
+77°F
W 12 mph
Feels like: +81°F
Precip.: 0%
Places in USA:
Name
°F
+30°F
+77°F
+77°F
+45°F
+55°F
+70°F
+77°F
+70°F
+25°F
+57°F
+48°F
+63°F
+63°F
+46°F
+9°F
24 Hours Forecast
Key West
Local time: 22:34
December 05, friday
0000
75°F
W
14 mph
0300
75°F
W
13 mph
0600
77°F
W
11 mph
0900
75°F
W
7 mph
1200
75°F
W
11 mph
1500
77°F
W
12 mph
1800
79°F
NW
11 mph
2100
77°F
NW
10 mph
Units of measurement: °C / °F