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Key West August Weather

Averages and records for weather in Key West, Florida in the month of August.

Typical Key West August Weather 1991–2020
Average daily high	90.0 °F
Average daily low	80.2 °F
Average monthly precipitation	5.4 inches
Daily chance of precipitation	47.2%

Key West August Weather Records 1948–2024
Highest temperature	95 °F	August 11, 2023
Lowest temperature	68 °F	August 11, 1952
Highest daily low	88 °F	August 9, 2023
Lowest daily high	81 °F	August 25, 2012
Hottest average high temperature	92.1 °F	2007
Coldest average high temperature	87.4 °F	2012
Most daily precipitation	9.7 inches	August 26, 2005
Most monthly precipitation	13.5 inches	2005

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	90.1	80.4	94	71
August 2	90.1	80.4	95	73
August 3	90.1	80.5	95	73
August 4	90.1	80.5	94	74
August 5	90.1	80.5	94	71
August 6	90.1	80.5	94	71
August 7	90.1	80.5	94	69
August 8	90.1	80.5	93	69
August 9	90.1	80.4	93	73
August 10	90.1	80.4	94	69
August 11	90.1	80.3	95	68
August 12	90.1	80.3	93	73
August 13	90.1	80.3	93	71
August 14	90.0	80.2	93	71
August 15	90.0	80.2	94	74
August 16	90.0	80.2	93	74
August 17	89.9	80.2	93	74
August 18	89.9	80.1	93	73
August 19	89.9	80.1	94	73
August 20	89.9	80.1	94	69
August 21	89.9	80.1	95	74
August 22	89.9	80.0	93	73
August 23	89.8	80.0	93	71
August 24	89.8	79.9	94	72
August 25	89.7	79.9	93	72
August 26	89.7	79.8	93	71
August 27	89.6	79.8	94	72
August 28	89.6	79.7	93	73
August 29	89.5	79.6	94	72
August 30	89.4	79.6	93	70
August 31	89.4	79.5	93	73

Weather Station Details

Years	Station	Coordinates
1948–2024	Key West International Airport	location