Key Largo FL Average Temperatures 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 1991 to 2020 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, 1991 to 2020
High °F	Low °F		High °C	Low °C
75	64	January	24	18
77	65	February	25	19
79	67	March	26	20
83	72	April	28	22
86	75	May	30	24
88	78	June	31	26
89	80	July	32	26
90	79	August	32	26
88	78	September	31	26
85	75	October	29	24
81	70	November	27	21
77	67	December	25	19
83	73	Year	28	23

Days of Hot Weather in Key Largo

Key Largo enjoys pleasantly hot temperatures throughout most the year. Usually the daily highs are in the 80s Fahrenheit. Thermometers typically reach into the 90s on 49 days annually, scattered from April to October. 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	27	9	0
February	26	10	0
March	30	17	0
April	30	24	0
May	31	30	1
June	30	30	6
July	31	31	15
August	31	31	18
September	30	30	8
October	31	29	2
November	29	20	0
December	28	11	0
Year	354	271	49

How Often Key Largo Has Cool Temperatures

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

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	3	11
February	1	7
March	0	5
April	0	2
May	0	0
June	0	0
July	0	0
August	0	0
September	0	0
October	0	0
November	0	3
December	1	8
Year	5	35

Key Largo Temperatures: Averages by Month

Days of Hot Weather in Key Largo

How Often Key Largo Has Cool Temperatures

References

More on Weather in Florida