Temperature for August
In Key West, FL during August the average high temperature is 89.9°F. The hottest day on record was August 1, 1988 when the temperature hit 100.9°F.
Precipitation for August
In August the average monthly rainfall in Key West, FL is 5.64 inches with rain usually falling on between 15 and 16 days. 2007 was the driest August with only 1.29 inches of rain falling, and 2005 was the wettest August with 13.24 inches of rain. The wettest single day in August was 27 August 2005 when 8.94 inches of rain fell.
In August it usually snows on between 0 and 1 days. Tornados are reported on 1 and 2 days in August. There are thunderstorms on between 11 and 12 days in August.