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Key West August Monthly Average Temperatures

A time series of monthly average August temperatures in Key West, Florida from 1948–2023.

Hottest August in Key West History

The hottest August in Key West, Florida history occurred in 2007, when the average temperature of 87.5 °F was 2.4 °F higher than normal.

Coldest August in Key West History

The coldest August in Key West, Florida history occurred in 1977, when the average temperature of 83.0 °F was 2 °F below normal.

Key West Average August Temperature by Year

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Year	Temperature (°F)	to Normal (°F)
2023	87.4	2.4
2022	85.0	-0.1
2021	84.8	-0.3
2020	87.2	2.1
2019	86.0	1.0
2018	85.7	0.7
2017	85.8	0.7
2016	84.6	-0.5
2015	85.8	0.8
2014	86.4	1.4
2013	83.4	-1.6
2012	83.4	-1.6
2011	85.5	0.5
2010	85.2	0.1
2009	86.3	1.2
2008	84.8	-0.2
2007	87.5	2.4
2006	84.6	-0.4
2005	85.9	0.8
2004	84.6	-0.4
2003	86.0	1.0
2002	84.5	-0.6
2001	84.4	-0.6
2000	83.2	-1.9
1999	84.0	-1.0
1998	84.6	-0.4
1997	84.4	-0.7
1996	83.7	-1.3
1995	85.3	0.3
1994	83.4	-1.6
1993	85.3	0.3
1992	85.1	0.0
1991	85.5	0.5
1990	85.6	0.5
1989	85.4	0.3
1988	84.2	-0.8
1987	85.3	0.3
1986	83.7	-1.3
1985	84.0	-1.0
1984	83.5	-1.5
1983	83.9	-1.1
1982	83.9	-1.1
1981	84.0	-1.1
1980	85.0	-0.1
1979	85.2	0.1
1978	85.3	0.3
1977	83.0	-2.0
1976	84.0	-1.0
1975	84.5	-0.5
1974	84.2	-0.9
1973	83.1	-1.9
1972	84.4	-0.6
1971	83.2	-1.9
1970	83.3	-1.7
1969	84.9	-0.2
1968	84.1	-1.0
1967	84.3	-0.7
1966	84.1	-1.0
1965	85.1	0.1
1964	84.9	-0.2
1963	85.0	-0.1
1962	85.0	0.0
1961	84.9	-0.1
1960	83.3	-1.8
1959	83.6	-1.5
1958	84.8	-0.2
1957	84.7	-0.4
1952	84.8	-0.2
1951	84.9	-0.2
1950	83.5	-1.5
1949	83.6	-1.5
1948	84.6	-0.5

Monthly average temperature is the mean of the daily high and low temperatures for the month
"Normal" is based on the average for the years 1991–2020