Florida Keys Weather
The Keys sub-tropical climate offers year-round sports and recreational opportunities. Winter, spring and fall are filled with lots of sunshine.
The hottest month is August with an average high of 89 F and an average low of 78 F. In January the average high temperature is 74 F and the average low is 65 F.
There has never been frost or freezing conditions in Key West.
Normal annual precipitation is 39 plus inches, with the largest monthly totals accumulating from July through September.
Subtropics marked by two distinct seasons
Weather is what brings a lot of people to Southern Florida - particularly during the dry, mild winter.
It's also what drives a lot of people away - particularly during the hot, rainy, sweaty, sticky summer.
Welcome to the subtropics, an area just outside the tropics, which lie between the Tropic of Cancer and the Tropic of Capricorn.
The Keys Temperature Annual high average
Month Air
January 7 4
February 75
March 78
April 81
May 85
June 87
July 89
August 89
September 88
October 84
November 80
December 76
Water temperatures go from 69 in January to 87 in July and August.
Other Keys Weather Indicators
Average Wind Speed 10.9
Clear Days 104
Partly Cloudy Days 155
Cloudy Days 107
Avg. Relative Humidity 74.5. To see stats by the month, go to
http://www.climate-zone.com/climate/united-states/florida/key-west/
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