MOUNT RUSHMORE NATIONAL MEMORIAL, SD

Average of Average Temperature (Degrees Fahrenheit)

(395870)

File last updated on December 6, 2025
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)	JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC		ANN
1962	-----	z	27.25	b	31.80	a	46.83		54.42		60.78		65.73		68.00		57.88		51.11		39.77	b	30.82		48.58	a
1963	14.94		31.24	a	38.63	a	43.65		53.13		63.07		71.00		70.35		65.92	e	58.29		39.90		25.79		47.99
1964	28.79		26.12		27.85		41.98		54.56		61.35		73.50		67.18	a	58.47		51.92		35.82		26.42		46.16
1965	31.32		26.12		20.27		44.12		51.32		59.55		68.16		65.92		45.98		53.81		41.12	a	34.42		45.18
1966	20.10		26.00		37.58		37.67		55.98		63.58		74.48		65.02		60.41	a	48.61		36.33		28.98		46.23
1967	29.21		28.68		34.71		42.65		47.32		58.08		70.35	a	70.00	a	60.63		49.97		35.62		23.82		45.92
1968	28.42		29.52		39.40		40.60		48.50		62.33	a	68.92		65.76		58.97		51.61		34.71	b	22.05		45.90
1969	21.90	a	28.77		28.21		48.50		57.35		57.35		69.32		73.65		65.28		39.69		39.08		30.97		46.67
1970	23.11		32.41		27.82	a	37.82		55.73		67.17		72.68		72.53		58.87		43.40	a	34.05		28.40	b	46.16
1971	23.13	a	26.25		30.76		42.17		50.77		64.63		67.89		72.71		56.23	f	44.07	b	32.04	d	26.15		43.69	a
1972	16.53		30.86		38.50		41.43		52.92	a	63.48		65.48		68.08		58.48		46.37		32.92		20.77	a	44.65
1973	27.28	a	32.34		36.29	e	40.12		51.87		63.50		69.63	a	71.35		56.81	a	50.82		33.84	a	29.15		46.92
1974	24.63		33.61		36.73		44.57		52.53		66.10	a	75.02		66.40	a	57.28	a	52.58		36.30		31.31		48.09
1975	25.60		24.39		28.94		38.70		-----	z	60.92		73.73		69.32		59.13		51.48		35.02		33.42		45.51	a
1976	27.10	a	34.84		32.55	a	44.47		55.27	g	62.87		71.95	a	69.69		62.52		45.05		32.98		30.87		46.81	a
1977	19.42		33.57		33.39		47.78		57.71		66.62	a	71.09	b	64.03	a	61.02		49.95		34.28		25.05		46.99
1978	18.33	b	21.36		37.10	a	41.00		51.42		62.75		68.76	b	68.53		63.85		50.23	a	31.27		19.50		44.51
1979	13.95	a	25.27		35.30	a	39.90		50.35	a	60.05		67.23		65.85		66.67		49.18		32.00		35.98		45.14
1980	21.26	b	28.21		31.63	a	44.15		52.34		65.40		73.23		65.68	c	60.35		47.98		38.62	b	33.38	a	46.85
1981	34.71		29.25		38.80	a	49.23		50.05	a	61.97		69.44		68.37		62.52		46.52		42.90	a	28.05		48.48
1982	17.65	a	27.27		32.98		39.14	b	50.80	a	56.62		70.70	a	69.58	a	58.19	a	44.89		32.29	a	29.38	a	44.12
1983	32.89		36.04		33.84		36.58		48.52		60.88		74.13		75.73		59.74	a	48.44		34.75		13.39		46.24
1984	29.02		33.81		31.95	a	39.81	a	50.40		59.70	b	69.48		72.93	a	54.69	a	44.90	a	38.22		26.19		45.93
1985	23.50	a	23.96	a	36.73	a	50.21	b	60.65		61.60		73.35	a	67.52		54.53		46.02		20.22		24.53		45.24
1986	36.82	a	27.64		42.33	a	41.80	b	51.90	a	66.60		70.00	a	67.90		52.22		47.15		34.26	c	32.67	b	47.61
1987	31.09	b	32.82		32.40	a	51.10	a	56.87		65.48		72.02	a	65.18	a	59.34	a	47.48		38.96	b	29.60	a	48.53
1988	24.93	b	27.40		35.12	k	46.42		57.10	a	73.12		72.82		71.77	a	59.53	a	48.31		35.27		29.40	a	49.64	a
1989	30.95		14.93	a	32.42		42.29	a	53.56	d	62.74	a	73.47	b	69.43	a	59.76	a	46.68	a	35.47	a	23.18	a	45.41
1990	34.00	j	29.04	b	34.92		42.32		49.61		64.55		67.85		70.05		65.12	a	47.60	a	40.55	a	20.48		48.37	a
1991	22.81		37.02		36.65	a	42.88		52.90		65.11	b	68.92	a	71.23	g	59.64	a	46.11		31.07	c	34.16		45.21	a
1992	33.83	b	36.29		38.32		45.37		55.27		58.60		59.72	a	61.82	a	59.57		47.48		30.64	a	22.26		45.76
1993	24.06		20.98		35.70	a	39.25		51.94		56.73		61.60		63.55		51.55		44.31		28.77		30.19		42.39
1994	24.94		20.57		35.84		41.55	a	56.79		64.12	a	66.29		67.79		61.60		46.03		34.38		33.03		46.08
1995	31.10		29.31	a	32.81		34.60	a	45.32		58.68		67.62	a	71.17	a	56.72		43.97	b	35.42		29.97		44.72
1996	19.92		28.48		25.39		42.03	a	45.89		63.69	a	66.98		69.17	g	54.75		45.19		27.47	a	23.98		40.34	a
1997	22.52		28.34		36.53	a	34.85		46.45	c	62.45		65.71	c	64.98		60.62		48.96	c	34.05		30.97	a	44.70
1998	27.71		33.04	b	27.93	b	42.67		52.74		54.14	a	68.89		67.62	a	64.95		45.77		37.07		26.90		45.79
1999	28.47	a	34.00	a	36.92		38.24	a	49.88	a	59.38		69.06		68.89		53.81	a	49.35		46.83		32.98		47.32
2000	29.03		35.61	a	37.38	b	42.16	a	53.73		60.03	a	69.85		71.67	a	61.37		49.32	c	26.07	b	21.84		46.50
2001	31.20	a	21.38	c	33.82		43.57		52.32	a	61.05		70.43	a	72.31		61.45	b	45.77		42.88	a	28.92		47.09
2002	27.27		31.85	a	22.89		39.68		46.98	a	65.57		73.55		66.47		58.82		36.93	a	37.27		32.48	b	44.98
2003	28.92		23.25	b	31.82	a	44.26	a	50.77		57.55		72.76	b	71.68	a	56.83		51.70	a	30.42		32.57	b	46.04
2004	28.26	b	30.57		38.57	b	44.82		51.00		57.37		67.47	a	63.55	a	58.57		47.29	b	36.43	a	32.25	a	46.34
2005	28.83	b	33.15	a	35.16	b	42.93		48.61		62.72		71.16		66.42	a	63.10	a	48.94		38.78		25.71		47.13
2006	36.37		25.66		32.27		46.75		54.26		65.02		74.30	d	67.13	a	54.58		43.00		36.25	b	31.05		47.22
2007	24.90		23.05		41.53		38.21	a	55.32		65.35		73.02	a	69.44		60.52		48.48		37.02	a	25.34		46.85
2008	23.66		27.28		31.50		38.70	c	48.81	e	58.34	a	68.40	a	66.69		56.28		44.95	a	38.03		20.74		43.62
2009	27.32		29.20		34.65		38.55		51.73		57.48		64.61		64.73		61.07		35.16		42.29	a	18.30	c	43.76
2010	29.82	a	23.20		38.79		42.03		46.69		59.67		67.79		70.44		59.90		51.95		32.73		29.45		46.04
2011	24.00		21.91		33.05		39.43		46.29		61.17		71.94		69.52		60.08		49.18		35.27		29.81		45.14
2012	29.73		26.19		46.71		47.05		52.52		66.95		74.40		69.65		63.78		44.21		40.22		29.13		49.21
2013	28.37		29.00		32.42		34.10		52.50		61.13		68.52		69.11		62.76	a	41.96	d	36.60		22.29		44.90
2014	26.45		17.96		32.52		41.58		51.19		58.45		67.24		65.98		59.12		50.37		30.27		30.73		44.32
2015	31.47		28.04		41.56		44.00		46.63		63.02		68.48		67.98		64.17		50.81		35.85		29.66		47.64
2016	31.68		34.50		39.34		43.85		51.47		68.15		70.12	a	66.60		58.85		52.08		45.18		21.29		48.59
2017	24.92		33.77		38.90		42.10		51.61		63.73		72.21		65.79		58.97		46.02		39.25		24.89		46.85
2018	30.13		18.79		33.82		37.75		56.06		63.38	a	67.97		66.52		59.29	a	43.34		33.25		29.69		45.00
2019	29.71		13.29		28.65		40.28		43.73		60.55		67.68		64.39		60.37		37.50		33.36	a	33.08	a	42.71
2020	29.50	a	26.59		34.81		39.02		49.18	a	66.32		69.75	e	71.23		59.98		42.13		41.79	a	33.42	a	46.98
2021	30.10	a	15.39		36.39		40.40		48.65		67.45		72.50		69.11		63.12	e	49.68		41.21	a	30.15		47.01
2022	29.72	a	24.41	a	33.43	b	36.30		49.60		62.85		71.81		70.78	a	64.23	b	49.88	c	30.02		23.92		45.58
2023	26.87		28.75		25.06		37.28		54.07	c	61.02		67.27		67.77		61.83		44.35		38.52		34.92	a	45.64
2024	24.15		33.48		33.11		42.67	a	49.26		62.79	a	69.85		69.03		67.10		53.69		36.83		34.47		48.04
2025	22.16		18.86		38.53		42.15		52.26		62.35		67.68		67.42		62.58		49.24		40.68		-----	z	47.63	a
Period of Record Statistics
MEAN	26.56		27.69		34.23		41.85		51.61		62.27		69.80		68.32		59.78		47.33		35.79		28.01		46.09
S.D.	4.95		5.50		4.73		3.69		3.44		3.40		3.08		2.80		3.78		4.12		4.61		4.80		1.46
SKEW	-0.43		-0.54		-0.42		0.27		0.09		0.24		-0.61		0.16		-0.79		-0.51		-0.39		-0.65		-0.22
MAX	36.82		37.02		46.71		51.10		60.65		73.12		75.02		75.73		67.10		58.29		46.83		35.98		49.21
MIN	13.95		13.29		20.27		34.10		43.73		54.14		59.72		61.82		45.98		35.16		20.22		13.39		42.39
YRS	62		64		63		64		62		64		64		62		63		64		64		63		55