Marathon, FL: December

31 December 2025: December 2025 averaged 74.3°F in Marathon, FL, the warmest December since 2021, 14th warmest of 66.

December 2025

Mean temperature: 74.3°F; Warmest since 2021; 14th warmest of 66
Precipitation: 1.42 in; Wettest since 2024; 31st wettest of 66

A normal December in Marathon, FL (1991 to 2020): a mean temperature of 72.3°F, between 69.5°F and 76.2°F in eight years of ten and 1.27 in of precipitation, between 0.27 in and 4.73 in in eight years of ten.

The mean temperature of every December in Marathon, FL since 1950: 74.3°F in 2025; the highest is 79.5°F, in 2016.

Normal range, 69.5 to 76.2°F

Every year, ranked, as a table

Every December in Marathon, FL from 1950 to 2025, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2025	74.3	14	78.7	18	69.9	11	1.42	31	0
2024	72.2	28	76.8	34	67.5	24	2.78	16	0
2023	71.6	34	76.3	39	66.9	32	8.58	1	0
2022	74	16	79.2	15	68.8	18	3.24	14	0
2021	75.9	6	81.4	3	70.4	8	1.15	37	0
2020	70	49	75.3	49	64.7	47	0.97	44	0
2019	75.1	8	79.7	11	70.4	8	4.59	8	0
2018	75.2	7	80.6	7	69.9	11	0.93	45	0
2017	73.1	21	78.7	18	67.5	24	1.04	41	0
2016	79.5	1	83.8	1	75.2	1	1.90	26	0
2015	77.5	2	81.2	4	73.8	2	7.94	2	0
2014	72	32	77.1	31	66.9	32	1.54	29	0
2013	76.8	4	81.2	4	72.3	3	2.77	17	1
2012	74.4	13	79.8	9	69.1	15	0.29	60	0
2011	74.5	12	79.5	13	69.6	14	0.39	57	0
2010	61.2	66	67.1	66	55.3	66	1.12	38	1
2009	73.1	21	78.2	25	68.1	20	2.06	24	0
2008	72.1	30	77	32	67.3	27	0.87	47	0
2007	76.1	5	81	6	71.2	5	1.32	32	1
2006	75	10	79.1	16	70.9	6	6.02	5	0
2005	71.3	38	77.3	29	65.2	45	0.19	65	0
2004	70.1	48	75.8	45	64.5	48	1.28	34	2
2003	68.3	57	73.6	62	63	53	3.31	13	0
2002	71.6	34	77	32	66.2	37	0.58	51	0
2001	74.2	15	78.6	20	69.8	13	3.10	15	0
2000	70.2	47	74.4	57	65.9	39	2.56	20	1
1999	72.3	27	77.6	28	67	30	0.19	65	0
1998	75.1	8	79.8	9	70.4	8	0.99	42	0
1997	70.4	46	75	50	65.7	41	6.21	4	0
1996	71.6	34	76.6	36	66.6	35	0.20	64	0
1995	69	52	73.7	61	64.3	49	1.25	35	0
1994	73.8	18	78.6	20	69	16	2.34	21	0
1993	69.6	51	76	40	63.1	50	1.07	40	0
1992	71.4	37	75.9	43	66.8	34	0.28	61	0
1991	72.2	28	77.2	30	67.2	28	1.45	30	0
1990	71.1	39	74.6	55	67.6	22	0.81	49	0
1989	65.8	65	72	64	59.6	64	3.37	12	0
1988	70.8	42	74.8	53	66.6	35	0.55	52	1
1987	71.1	39	75	50	67.1	29	1.20	36	0
1986	74.6	11	78.5	22	70.7	7	5.95	6	0
1985	69	52	74.2	59	63.1	50	4.04	9	2
1984	72.4	26	75.9	43	68.9	17	1.08	39	0
1983	73.4	20	78.2	25	67.7	21	2.17	23	1
1982	71.7	33	75.7	46	67.6	22	0.76	50	0
1972	73.6	19	79.7	11	67.5	24	2.58	19	0
1971	77.1	3	82.6	2	71.7	4	1.92	25	1
1970	72.6	24	78.1	27	67	30	0.38	58	0
1969	68.8	55	74.8	53	62.7	55	1.77	27	1
1968	69.8	50	76.5	37	63.1	50	0.46	55	0
1966	68.9	54	75.4	47	62.5	56	0.92	46	0
1965	71	41	76.7	35	65.4	42	0.83	48	1
1964	73.9	17	79.3	14	68.6	19	0.53	53	0
1963	66.3	64	72	64	60.5	60	1.75	28	0
1962	66.5	62	73	63	59.9	62	2.32	22	0
1961	72.5	25	78.4	23	66.2	37	0.98	43	1
1960	67.7	60	73.9	60	61.6	58	0.41	56	1
1959	68.3	57	74.4	57	62.1	57	3.93	10	0
1958	70.6	44	76.4	38	64.8	46	7.23	3	1
1957	68	59	75.4	47	60.1	61	5.03	7	2
1956	70.6	44	78.3	24	62.9	54	0.25	63	0
1955	70.8	42	76	40	65.4	42	1.31	33	1
1954	66.5	62	74.9	52	58.2	65	0.49	54	0
1953	72.1	30	78.8	17	65.4	42	0.33	59	0
1952	68.4	56	76	40	60.7	59	3.47	11	0
1951	73.1	21	80.3	8	65.9	39	0.26	62	0
1950	67.1	61	74.6	55	59.8	63	2.67	18	1

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2016	79.5
2015	77.5
1971	77.1
2013	76.8
2007	76.1
2021	75.9
2018	75.2
2019	75.1
1998	75.1
2006	75

Coldest
Year	Mean, °F
2010	61.2
1989	65.8
1963	66.3
1962	66.5
1954	66.5
1950	67.1
1960	67.7
1957	68
2003	68.3
1959	68.3

Wettest
Year	Precipitation, in
2023	8.58
2015	7.94
1958	7.23
1997	6.21
2006	6.02
1986	5.95
1957	5.03
2019	4.59
1985	4.04
1959	3.93

Driest
Year	Precipitation, in
2005	0.19
1999	0.19
1996	0.20
1956	0.25
1951	0.26
1992	0.28
2012	0.29
1953	0.33
1970	0.38
2011	0.39

The hottest, coldest and wettest days

Hottest day: 84°F; 8 December 2025, 5 December 2025
Coldest night: 55°F; 31 December 2025
Wettest day: 0.73 in; 8 December 2025

Every month, season and year

Months

Seasons

Years

Marathon, FL the day's answers

All-time records

Every answer in words

December 2025 brought 1.42 in of precipitation in Marathon, FL, the wettest December since 2024, 31st wettest of 66.
The hottest day of December 2025 in Marathon, FL: 84°F on Monday 8 December 2025 and Friday 5 December 2025.
The coldest night of December 2025 in Marathon, FL: a low of 55°F on Wednesday 31 December 2025.
The wettest day of December 2025 in Marathon, FL: 0.73 in on Monday 8 December 2025.