Islamorada FL Average Temperatures by Month

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

The average high and low temperatures are listed below monthly and annually for Upper Matecumbe Key and its neighbors, 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 at Islamorada, 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 2007 to 2016. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for Islamorada, 2007 to 2016
High °F	Low °F		High °C	Low °C
75	65	January	24	18
76	66	February	24	19
78	69	March	25	20
81	73	April	27	23
84	77	May	29	25
86	79	June	30	26
88	80	July	31	27
89	80	August	32	27
87	79	September	31	26
85	77	October	29	25
79	70	November	26	21
78	69	December	25	21
82	73	Year	28	23

30-year temperature averages for Islamorada, 1991 to 2020
High °F	Low °F		High °C	Low °C
75	65	January	24	18
77	67	February	25	19
78	69	March	26	21
81	72	April	27	22
84	76	May	29	25
87	78	June	30	26
89	80	July	32	26
89	79	August	32	26
88	79	September	31	26
85	76	October	30	25
80	71	November	27	22
78	68	December	25	20
83	73	Year	28	23

Days of Hot Weather in Islamorada

Islamorada enjoys pleasantly hot temperatures throughout much of the year. Most days have highs in the 80s Fahrenheit. Thermometers typically reach into the 90s for 30 days annually, scattered from May to November. It normally doesn't get any hotter than 100 °F (38 °C) at this cluster of six islands in the midst of the Florida Keys.

Days per month in Islamorada of at least 70, 80 or 90 °F
	70 °F 21 °C	80 °F 27 °C	90 °F 32 °C
January	27	6	0
February	26	8	0
March	30	14	0
April	30	23	0
May	31	30	0
June	30	30	3
July	31	31	8
August	31	31	12
September	30	30	5
October	31	30	2
November	30	18	0
December	30	12	0
Year	357	261	30

How Often Islamorada Has Cool Temperatures

Cold temperatures simply don't happen at Islamorada. Even winter nights enjoy warm weather, with just five on average seeing lows of 50 °F or less. Only once every few years does the thermometer touch 40 °F (4 °C).

Days per month on average in Islamorada 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	6
March	0	4
April	0	1
May	0	0
June	0	0
July	0	0
August	0	0
September	0	0
October	0	0
November	0	2
December	1	6
Year	5	29

Islamorada Temperatures: Averages by Month

Days of Hot Weather in Islamorada

How Often Islamorada Has Cool Temperatures

References

More on Weather in Florida