Key West August Weather

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

Key West August Weather Records 1948–2023
Highest temperature	95 °F	August 3, 1957
Lowest temperature	68 °F	August 11, 1952
Highest daily low	87 °F	August 4, 2007
Lowest daily high	81 °F	August 25, 2012
Hottest average temperature	2.4 °F above average	2007
Coldest average temperature	-2.0 °F below average	1977
Most daily precipitation	9.7 inches	August 26, 2005
Most monthly precipitation	13.5 inches	2005

Day	Average (°F)		Record (°F)
	High	Low	High	Low
August 1	90.1	80.4	93	71
August 2	90.1	80.4	93	73
August 3	90.1	80.5	95	73
August 4	90.1	80.5	93	74
August 5	90.1	80.5	93	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	94	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	92	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