UNIVERSITY OF MIAMI

Heat Index and Dewpoint Climatology for Key West, FL

· The data shown on this page are derived from the hourly METAR reports from Key West International Airport in Monroe County, Florida (KEYW), provided by Iowa State University. These data span 1948-present and the station has been at the same location during this time: the east end of the airport grounds (map).

· The reported air and dew point temperature values are used to calculate the relative humidity and in turn, the heat index. The heat index is only calculated when the air temperature is above 80°F.

· The averages are calculated using the 1991-2020 period, and the records span the 1948-present period. None of the values shown here represent official climate normals or records, and while some quality control was performed on the data, errors could still exist.

· Daily heatmap of hours spent above 95°F heat index

· Time series of annual time spent above 90/95/100°F heat index thresholds (and 105°F)

· Average summertime diurnal cycle of HI, T, and Td from 2011-2020 & 1951-1960

Heat Index Threshold Consecutive Days (1st) Ending Date Consecutive Days (2nd) Ending Date Consecutive Days (3rd) Ending Date
100°F+ 80 20230902 44 20200905 33 20160826
101°F+ 29 20230725 23 20160816 20 20230815
102°F+ 29 20230725 20 20230815 20 20200825
103°F+ 20 20230815 17 20230725 12 20160713
104°F+ 12 20230815 10 20230725 10 19950905
105°F+ 12 20230815 10 20230725 10 19950905
106°F+ 12 20230815 10 20230725 8 19950903
107°F+ 8 20230811 5 20230915 4 20230902
108°F+ 8 20230811 5 20230915 4 19810824
109°F+ 8 20230811 5 20230915 3 20230629
110°F+ 3 20230915 2 20230811 2 20230808
This table shows the record number of consecutive days that the heat index was at or above a given threshold, as well as the date that the streak ended. For historical context, the second and third highest number of consecutive days is also provided. If there is a tie, the most recent date will be listed first, next most recent date will be listed second, etc.


[JUMP TO MONTHLY HEAT INDEX DATA]
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[JUMP TO DAILY TEMPERATURE DATA]
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[JUMP TO DAILY DEWPOINT DATA]
[JUMP TO MONTHLY DEWPOINT DATA]
[JUMP TO DAILY TEMPERATURE DATA]
[JUMP TO MONTHLY TEMPERATURE DATA]



[JUMP TO DAILY HEAT INDEX DATA]
[JUMP TO MONTHLY HEAT INDEX DATA]
[JUMP TO MONTHLY DEWPOINT DATA]
[JUMP TO DAILY TEMPERATURE DATA]
[JUMP TO MONTHLY TEMPERATURE DATA]




[JUMP TO DAILY HEAT INDEX DATA]
[JUMP TO MONTHLY HEAT INDEX DATA]
[JUMP TO DAILY DEWPOINT DATA]
[JUMP TO DAILY TEMPERATURE DATA]
[JUMP TO MONTHLY TEMPERATURE DATA]




[JUMP TO DAILY HEAT INDEX DATA]
[JUMP TO MONTHLY HEAT INDEX DATA]
[JUMP TO DAILY DEWPOINT DATA]
[JUMP TO MONTHLY DEWPOINT DATA]
[JUMP TO MONTHLY TEMPERATURE DATA]



[JUMP TO DAILY HEAT INDEX DATA]
[JUMP TO MONTHLY HEAT INDEX DATA]
[JUMP TO DAILY DEWPOINT DATA]
[JUMP TO MONTHLY DEWPOINT DATA]
[JUMP TO DAILY TEMPERATURE DATA]


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