Key West December Weather

Typical Key West December Weather 1991–2020
Average daily high	77.1 °F
Average daily low	67.9 °F
Average monthly precipitation	2.2 inches

Key West December Weather Records 1948–2023
Highest temperature	88 °F	December 22, 1948
Lowest temperature	44 °F	December 24, 1989
Highest daily low	81 °F	December 2, 2018
Lowest daily high	53 °F	December 24, 1989
Hottest average temperature	5.0 °F above average	2015
Coldest average temperature	-9.4 °F below average	2010
Most daily precipitation	6.7 inches	December 8, 1986
Most monthly precipitation	11.2 inches	1986

Day	Average (°F)		Record (°F)
	High	Low	High	Low
December 1	78.6	69.7	84	56
December 2	78.5	69.6	86	59
December 3	78.5	69.4	86	57
December 4	78.3	69.3	86	56
December 5	78.2	69.2	86	56
December 6	78.1	69.0	86	57
December 7	78.0	68.9	85	55
December 8	77.8	68.8	85	54
December 9	77.7	68.6	85	56
December 10	77.7	68.6	84	55
December 11	77.6	68.4	85	51
December 12	77.4	68.3	84	46
December 13	77.3	68.2	85	46
December 14	77.2	68.1	84	50
December 15	77.2	68.0	83	46
December 16	77.1	67.9	83	51
December 17	77.0	67.8	85	51
December 18	77.0	67.8	83	54
December 19	77.0	67.8	85	52
December 20	76.9	67.8	84	50
December 21	76.8	67.6	83	54
December 22	76.6	67.5	88	51
December 23	76.5	67.3	83	50
December 24	76.4	67.2	84	44
December 25	76.3	67.0	83	46
December 26	76.2	66.8	84	45
December 27	76.1	66.7	83	44
December 28	76.1	66.6	83	49
December 29	76.0	66.5	84	54
December 30	76.0	66.5	85	54
December 31	75.9	66.4	84	52