Key West Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Key West, Florida during each month of the year.

The average high and low temperatures are listed below by month and annually for Key West, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 70, 80 or 90 °F each month in Key West, scroll down farther. There are also monthly and yearly counts of nights with warm temperatures.

All the numbers are averages, based on climate data gathered from 1981 to 2010.

Average Key West temperatures
High °F Low °F   High °C Low °C
74 64 January 24 18
76 66 February 24 19
78 68 March 26 20
81 72 April 27 22
85 76 May 29 24
88 79 June 31 26
89 80 July 32 27
89 80 August 32 26
88 79 September 31 26
85 76 October 29 24
80 72 November 27 22
76 67 December 24 19
83 73 Year 28 23

Days of Hot Weather in Key West

It's not normal for the temperature to rise above 100 °F in Key West. But it does get into the 90s for much of July and August. Even during winter months, Key West usually has a few days of 80-degree weather.

Days per month in Key West of at least 70, 80 or 90 °F
  70 °F
21 °C
80 °F
27 °C
90 °F
32 °C
January 24 5 0
February 24 8 0
March 29 13 0
April 30 21 0
May 31 30 0
June 30 30 3
July 31 31 11
August 31 31 14
September 30 30 4
October 31 28 0
November 29 16 0
December 27 8 0
Year 347 251 32

Number of Warm Nights a Month

Nights at Key West are consistently warm, staying above 50 °F nearly every day of the year. From June to September, the temperature normally never gets colder than 70 degrees.

Average number of days monthly in Key West that stay above 50, 60 or 70 °F
  50 °F
10 °C
60 °F
16 °C
70 °F
21 °C
January 30 23 7
February 28 23 8
March 31 28 14
April 30 29 21
May 31 31 29
June 30 30 30
July 31 31 31
August 31 31 31
September 30 30 30
October 31 31 29
November 30 30 21
December 31 27 12
Year 363 344 262
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

Key West Weather
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