Average December Temperature in Ketchum by Year

This page contains a list of the average monthly high and low temperatures in Ketchum, Idaho for the month of December each year between 1937 and 2023. It is based on NOAA data.

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What Was the Hottest December Ever in Ketchum?

1939 was the warmest December in the history of Ketchum, Idaho. The average daily high temperature was 41.3 °F, and the average low was 15.0 °F.

What Was the Coldest December Ever in Ketchum?

1990 was the coolest December in the history of Ketchum, Idaho. The average daily high temperature was 23.1 °F, and the average low was -7.1 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	3	37.9	14.0
2022	65	26.7	4.9
2021	19	31.7	12.2
2020	30	33.8	8.6
2019	50	28.3	8.9
2017	11	35.2	11.0
2016	74	25.1	1.6
2014	4	34.3	17.2
2013	49	30.6	6.8
2012	29	29.8	12.8
2011	16	34.5	10.3
2010	37	29.9	10.2
2009	60	28.6	4.8
2008	40	31.1	8.0
2007	52	28.4	8.0
2006	36	31.4	8.8
2005	44	29.6	8.7
2004	8	33.3	13.5
2003	12	33.2	12.9
2002	7	34.0	14.0
2001	67	26.5	5.0
1998	45	29.3	8.9
1997	21	32.8	10.6
1996	31	31.8	10.5
1995	38	31.5	8.4
1994	42	29.9	8.6
1993	51	31.0	5.7
1992	64	28.1	4.3
1991	61	32.2	1.1
1990	81	23.1	-7.1
1989	9	37.6	9.1
1988	68	28.4	2.6
1987	47	30.7	7.2
1986	14	36.5	8.8
1985	71	27.6	1.4
1984	78	25.8	-1.6
1983	77	24.1	0.1
1982	53	29.5	6.2
1981	32	32.6	9.2
1980	15	35.0	10.0
1979	20	35.7	8.1
1978	76	26.4	-0.1
1977	17	33.6	10.9
1975	5	36.9	11.4
1974	41	32.1	6.4
1973	23	33.2	10.0
1972	58	28.8	5.2
1971	72	26.8	1.6
1970	69	27.3	3.7
1969	25	36.1	7.0
1968	46	32.2	5.6
1967	63	29.5	3.1
1966	62	30.0	2.8
1965	43	33.7	4.6
1964	55	30.6	4.5
1963	56	33.0	2.1
1962	13	37.9	7.9
1961	75	27.7	-1.4
1960	70	31.7	-1.3
1959	33	38.8	2.9
1958	2	40.6	12.3
1957	34	34.4	6.1
1956	48	35.3	2.3
1955	22	34.2	9.0
1954	54	34.0	1.6
1953	35	35.1	5.5
1952	66	29.6	1.9
1951	79	24.8	-2.9
1950	6	39.4	8.8
1949	57	32.4	2.3
1948	80	26.4	-5.7
1947	18	36.9	7.1
1946	24	35.0	8.1
1945	73	29.2	-1.2
1943	27	40.9	1.9
1942	59	33.9	-0.3
1941	39	34.6	5.3
1940	28	35.5	7.2
1939	1	41.3	15.0
1938	26	36.1	7.0
1937	10	37.1	9.3

Weather Station Details

Years	Station	Coordinates
1973–2024	Ketchum	location
1937–1972	Sun Valley	location