July is the hottest month in Key West with an average temperature of 30°C (85°F) and the coldest is January at 21°C (69°F) with the most daily sunshine hours at 11 in July. The wettest month is September with an average of 150mm of rain. The best month to swim in the sea is in August when the average sea temperature is 30°C (86°F).
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Sunrise 06:36
Sunset 17:45
Sunrise 06:36
Sunset 17:45