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The climate of Key West (Florida - United States of America)
Key West is the most southerly located city on the mainland of Florida. Because of its favorable climate it is very popular among sun worshippers. The atmosphere and architecture are very different from those in other cities in the United States. Relaxed, hippie-like and full of atmosphere are the key words that describe this city best. Key West has a subtropical climate. During the winter night time temperatures hardly ever drop below 13-14 degrees Celsius (55-57 degrees Fahrenheit). Daytime temperatures during the winter are about 22-26 degrees Celsius (71-79 degrees Fahrenheit). During the winter precipitation figures are low, only 6 days with precipitation can be recorded per month. Key West also gets a lot of sunshine. From January till April 40% of the time skies are clear blue, 40% of the time skies are slightly clouded for a few hours per day and 20% of the time skies are clouded. April is the sunniest month with sunshine for about 84% of the time. October, November and December are the darkest months with sunshine for ‘only’ 70% of the time.

Key West has a dry period from November till the second part of May. During this period about 50 millimeters of precipitation falls which is about 35% of the national average of 75 millimeters per month. From the second part of May chances of precipitation rapidly increase as well as the amount of precipitation that may fall within a short period of time. The wettest period is from the second part of August till the end of September with 150-180 millimeters of precipitation per month.

Average wind speeds are highest during the dry period from November till April. On average the wind blows with a speed of 18-20 kilometers per hour during this period. From May till October wind speeds are slightly lower, about 14-18 kilometers per hour. This is rather surprising since hurricane season is from June till November. During this period tropical depressions pass over the Caribbean increasing the risk of tropical storms and hurricanes. The risk of Key West getting hit by a hurricane is not that high. However, the weather is influenced a few times per year by storm activity in the vicinity.

Humidity figures
Average humidity figures are about 75% all year round. During the morning humidity figures may be slightly higher, during the afternoon slightly lower. Especially during the afternoon humidity figures here are higher than the national average. This in combination with high temperatures may cause things to feel muggy.


Climate information
The figures below are based on long term weather and climate records. They are an average for Key West:

temperature (°C)


temperature (°C)
hours of sunshine

average days with precipitation
per month
per month
temperature (°C)
January 24 17 8 7 24
February 24 17 9 6 24
March 26 20 10 6 24
April 28 21 11 5 25
May 29 23 11 9 27
June 31 25 10 13 28
July 32 26 10 13 29
August 32 26 10 15 30
September 31 25 9 14 29
October 29 23 8 10 28
November 27 21 8 7 27
December 24 18 7 7 25
= 0-5 mm ● = 6-30 mm ● = 31-60 mm ● = 61-100 mm ● = 101-200 mm ● = over 200 mm
= 0-0.2 inches ● = 0.2-1.2 inches ● = 1.2-2.4 inches ● = 2.5-4 inches ● = 4.1-8 inches ● = over 8 inches

More climate information
Climate figures are very useful but don’t present a general impression of the climate and the eventual weather circumstances within a certain period. The figures don’t always reflect the chance of wintry weather, extreme heat or hurricanes. That is why we offer useful extra climate information for each month of the year:

chance of
(very) hot


chance of
(very) cool
chance of

chance of
chance of
sunny days


click here for the explanation of the symbols

The information at this site was carefully composed from climate data collected by meteorological services, meteorological offices, climate experts and other sources. “More climate info” is based on statistics, climate data and personal experience. No rights can be derived from this site. Weather has no memory and gives no guaranties. Nothing is as changeable and unpredictable as the weather. The authors of this site feel in no way responsible for any damages caused by misinterpretation or other circumstances that may influence your holiday or trip to a certain destination. We provide information, it’s up to the reader to use it to it’s benefit.


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