Key Largo Temperatures: Averages by Month





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

The average high and low temperatures are listed below monthly and annually for the upper Florida Key island, 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 Largo, scroll down farther. There are also monthly and yearly counts of days with cool weather.

The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1981 to 2010 weather.

10-year temperature averages for Key Largo, 2010 to 2019
High °F Low °F   High °C Low °C
76 62 January 24 17
78 65 February 25 19
79 67 March 26 19
83 72 April 28 22
85 75 May 30 24
88 78 June 31 26
89 79 July 32 26
90 79 August 32 26
88 78 September 31 26
85 76 October 30 24
81 70 November 27 21
79 68 December 26 20
84 73 Year 29 23
30-year temperature averages for Key Largo, 1981 to 2010
High °F Low °F   High °C Low °C
75 60 January 24 16
77 62 February 25 17
78 65 March 26 18
81 68 April 27 20
84 73 May 29 23
86 76 June 30 24
89 77 July 31 25
89 77 August 32 25
88 76 September 31 24
85 73 October 29 23
80 69 November 27 21
76 64 December 25 18
82 70 Year 28 21

Days of Hot Weather in Key Largo

Key Largo enjoys pleasantly hot temperatures throughout most the year. Usually daily highs are in the 80s Fahrenheit. Thermometers typically reach into the 90s just 22 days annually, scattered from June to September. It normally doesn't get any hotter than 100 °F (38 °C) at this Florida Keys island.

Days per month in Key Largo of at least 70, 80 or 90 °F
  70 °F
21 °C
80 °F
27 °C
90 °F
32 °C
January 26 3 0
February 26 7 0
March 26 9 0
April 30 18 0
May 31 28 0
June 30 29 2
July 31 31 7
August 31 31 10
September 30 30 3
October 31 29 0
November 30 19 0
December 28 6 0
Year 354 241 22

How Often Key Largo Has Cool Temperatures

Chilly weather rarely happens at Key Largo. Even winter nights enjoy warm temperatures, with just ten on average seeing lows of 50 °F or less. Thermometers normally drop to 40 °F (4 °C) one or two nights a year, usually in January.

Days per month on average in Key Largo when the minimum temperature drops to 60 or 50 °F or lower
  50 °F
10 °C
60 °F
16 °C
January 5 14
February 3 10
March 0 7
April 0 2
May 0 0
June 0 0
July 0 0
August 0 0
September 0 0
October 0 1
November 0 3
December 2 11
Year 10 48
References

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.

NOAA National Centers for Environmental Information. 1981-2010 U.S. Climate Normals. (Data Access. FTP.)

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