Average December Temperature in Mt. Washington by Year

This page contains a list of the average monthly high and low temperatures in Mt. Washington, New Hampshire for the month of December each year between 1948 and 2023. It is based on NOAA data.

Change:

Month:

What Was the Hottest December Ever in Mt. Washington?

2015 was the warmest December in the history of Mt. Washington, New Hampshire. The average daily high temperature was 31.7 °F, and the average low was 17.1 °F.

What Was the Coldest December Ever in Mt. Washington?

1989 was the coolest December in the history of Mt. Washington, New Hampshire. The average daily high temperature was 3.1 °F, and the average low was -13.8 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	2	26.4	14.9
2022	16	20.1	8.3
2021	13	22.4	6.9
2020	15	21.9	7.4
2019	26	20.5	4.8
2018	40	19.4	3.2
2017	66	11.9	-3.1
2016	57	17.1	-0.3
2015	1	31.7	17.1
2014	6	24.0	9.4
2013	55	17.3	0.1
2012	10	22.9	8.3
2011	8	23.9	8.7
2010	53	16.6	2.0
2008	48	20.5	-0.4
2007	56	16.9	0.6
2006	12	22.3	7.6
2005	49	16.9	3.0
2004	45	18.8	2.7
2003	24	20.5	5.3
2002	51	17.7	1.5
2001	4	24.2	9.7
2000	68	12.6	-4.1
1999	18	21.4	6.0
1998	23	21.4	4.5
1997	31	20.1	3.9
1996	9	23.1	9.0
1995	62	13.4	0.0
1994	3	24.9	9.2
1993	33	18.4	5.2
1992	34	19.7	3.8
1991	47	19.3	2.0
1990	14	24.8	4.5
1989	75	3.1	-13.8
1988	65	13.8	-3.2
1987	42	17.7	4.8
1986	37	19.1	3.7
1985	69	11.6	-4.2
1984	17	23.2	4.9
1983	58	16.5	-1.6
1982	5	25.3	8.4
1981	43	17.5	4.9
1980	70	13.4	-6.5
1979	39	19.0	3.7
1978	60	15.4	-1.2
1977	61	14.2	-0.5
1976	73	10.2	-10.2
1975	54	18.4	-0.6
1974	21	19.9	7.1
1973	7	25.5	7.8
1972	44	19.6	2.0
1971	52	18.1	1.0
1970	64	14.1	-1.3
1969	46	17.7	3.7
1968	59	15.8	-1.1
1967	36	20.0	3.2
1966	22	20.9	5.9
1965	35	18.2	5.0
1964	19	21.6	5.5
1963	74	6.9	-7.4
1962	63	15.0	-1.7
1961	38	18.5	4.2
1960	67	13.4	-4.6
1959	28	18.2	6.6
1958	71	8.5	-6.6
1957	11	23.5	6.9
1956	27	20.5	4.5
1955	72	8.3	-6.9
1954	41	19.3	3.2
1953	20	21.6	5.5
1952	25	18.1	7.1
1951	50	18.3	0.9
1950	29	18.9	5.9
1949	30	20.4	4.2
1948	32	18.1	5.6

Weather Station Details

Years	Station	Coordinates
1948–2024	Mt. Washington	location