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.
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.