UNIVERSITY OF MIAMI

Heat Index and Dewpoint Climatology for Key West, FL

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· 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 1939-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 1939-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 90°F heat index (and 95°F)

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

· Time series of annual average heat index, temperature, and dewpoint

· 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+ 84 20230902 44 20200905 33 20240803
101°F+ 32 20240802 29 20230725 29 19810801
102°F+ 32 20240802 29 20230725 29 19810801
103°F+ 32 20240802 20 20230815 17 20230725
104°F+ 21 20240802 12 20240816 12 20230815
105°F+ 21 20240802 12 20240816 12 20230815
106°F+ 12 20230815 10 20230725 8 19950903
107°F+ 8 20230811 6 20240816 5 20230915
108°F+ 8 20230811 6 20240816 5 20230915
109°F+ 8 20230811 5 20240816 5 20230915
110°F+ 3 20230915 2 20240915 2 20240813
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]
[JUMP TO DAILY DEWPOINT DATA]
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[JUMP TO DAILY TEMPERATURE DATA]
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[JUMP TO DAILY HEAT INDEX DATA]
[JUMP TO DAILY DEWPOINT DATA]
[JUMP TO MONTHLY DEWPOINT DATA]
[JUMP TO DAILY TEMPERATURE DATA]
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[JUMP TO DAILY HEAT INDEX DATA]
[JUMP TO MONTHLY HEAT INDEX DATA]
[JUMP TO MONTHLY DEWPOINT DATA]
[JUMP TO DAILY TEMPERATURE DATA]
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[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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