MOUNT RUSHMORE NATIONAL MEMORIAL, SD

Average of Maximum Temperature (Degrees Fahrenheit)

(395870)

File last updated on December 5, 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	37.54	b	42.26		59.00		63.97		71.13		75.29		79.68		69.93		61.74		50.48	a	40.32		59.21	a
1963	26.29		41.59	a	49.42		54.50		64.71		75.37		81.55		81.35		76.48	e	67.90		49.57		35.84		58.71
1964	37.23		34.55		37.65		51.53		64.45		71.07		83.90		79.17	a	70.63		62.00		45.50		36.39		56.17
1965	40.35		35.79		30.84		53.87		62.16		68.83		78.39		75.77		55.13		63.84		49.67		42.00		54.72
1966	30.48		35.04		48.32		47.73		68.71		74.60		86.42		75.35		70.72	a	59.42		46.63		37.81		56.77
1967	38.23		39.00		45.10		53.50		56.97		67.67		81.29		82.33	a	70.73		60.65		44.47		32.52		56.04
1968	39.10		39.45		50.00		51.97		58.68		74.17	a	80.84		78.35		70.07		63.06		42.37		32.00		56.67
1969	35.37	a	37.68		37.42		59.47		69.19		67.70		80.65		85.00		77.17		48.68		48.60		38.90		57.15
1970	32.90		43.36		36.73	a	47.17		68.45		79.60		86.42		85.52		71.53		52.94		42.53		38.50	a	57.14
1971	33.30	a	35.46		40.65		52.20		61.03		75.73		80.29		84.16		66.88	f	55.76	b	43.93	c	35.45		54.36	a
1972	28.71		41.83		49.55		50.23		62.48		73.83		76.10		78.32		70.77		57.52		41.27		30.00	a	55.05
1973	36.70	a	42.32		45.15	e	50.00		62.58		74.17		80.40	a	83.94		65.57		62.55		42.83	a	39.45		57.14
1974	33.71		43.36		48.97		54.80		64.42		78.38	a	88.97		77.83	a	69.76	a	63.13		44.90		40.26		59.04
1975	34.10		35.54		38.74		48.40		-----	z	71.53		85.39		81.00		70.87		62.55		43.77		43.81		55.97	a
1976	37.30	a	44.24		42.87	a	54.60		67.85	d	76.00		84.03	a	82.32		74.83		56.45		43.97		40.32		58.73
1977	30.71		43.82		45.35		58.13		70.23		78.90		84.10		75.17	a	73.17		61.45		45.03		35.26		58.44
1978	29.45		31.71		48.70	a	51.00		61.81		74.83		79.67	a	80.77		76.07		63.77	a	42.83		29.39		55.83
1979	24.13	a	38.07		46.30	a	52.10		62.63	a	72.60		78.65		75.55		78.40		59.61		39.87		46.13		56.17
1980	32.10	a	38.21		41.90		55.13		64.13		77.57		86.13		78.23		72.37		57.42		47.83	a	43.16		57.85
1981	43.90		38.96		49.20	a	60.53		60.26		73.77		80.48		78.58		74.03		56.55		51.93	a	36.81		58.75
1982	28.97		37.00		43.39		49.93	a	61.03	a	66.10		82.20	a	81.07	a	69.10	a	53.74		41.38	a	38.32		54.35
1983	42.10		45.43		42.19		45.63		58.39		71.20		86.26		87.35		72.30		59.06		41.90		21.65		56.12
1984	37.19		42.83		40.50	a	48.97	a	62.42		72.14	b	80.61		83.63	a	66.79	a	53.30	a	46.77		36.94		56.01
1985	32.39		34.19	a	46.68		61.34	a	72.13		73.77		84.84		80.16		64.30		56.90		29.17		34.52		55.86
1986	46.23		38.25		52.57	a	51.07	a	63.32		77.23		80.94		79.00		60.77		55.29		43.61	b	40.83	b	57.42
1987	39.07	a	40.07		41.80	a	62.66	a	66.42		75.57		83.07	a	75.83	a	69.62	a	58.90		46.10		37.90	a	58.08
1988	33.60	a	38.28		45.25	k	59.00		68.07	a	84.77		84.77		83.17	a	70.97	a	58.26		42.97		39.23		60.28	a
1989	41.52		23.43		43.16		52.21	a	65.52	d	74.31	a	83.93	a	81.03	a	70.86	a	55.60	a	44.97		31.16		55.64
1990	41.52	j	38.04	a	43.87		52.93		59.48		75.63		77.65		80.87		74.69	a	58.53	a	49.69	a	29.58		58.27	a
1991	31.58		45.71		45.63	a	51.20		61.87		75.45	a	80.07	a	81.00	f	69.10	a	56.29		39.43	b	41.84		54.38	a
1992	42.28	b	44.55		46.77		55.77		65.90		68.70		70.03	a	72.77	a	70.57		56.74		37.79	a	31.94		55.32
1993	32.65		29.39		43.77		47.77		61.35		66.23		71.06		73.35		60.83		53.42		37.23		37.42		51.21
1994	34.35		29.57		45.29		51.83		67.10		74.23		76.68		78.39		71.20		53.87		42.57		40.97		55.50
1995	39.55		38.64		41.65		43.17		53.45		67.43		77.39		81.68		65.77		52.67	a	45.13		39.32		53.82
1996	29.35		38.83		34.03		52.41	a	54.16		73.07	a	76.03		79.84	f	62.87		54.52		36.72	a	34.03		49.64	a
1997	31.39		36.61		47.50	a	43.40		55.72	b	70.50		75.33	a	73.16		70.23		58.79	b	42.27		38.33	a	53.60
1998	36.13		39.86		36.70	a	51.33		62.19		63.10		77.29		76.68		74.30		52.48		45.10		35.90		54.26
1999	38.40	a	42.44	a	47.39		45.45	a	57.87		69.30		79.19		79.19		64.03		59.71		56.07		40.61		56.64
2000	37.06		45.29	a	46.67	a	53.21	a	63.58		70.53		79.55		82.23		72.20		57.00	b	33.83	a	31.81		56.08
2001	39.42		30.65	b	42.19		51.47		61.35		70.27		79.45		81.45		70.64	b	54.74		51.50		36.58		55.81
2002	35.68		40.00		32.65		50.20		56.13		75.17		83.71		76.71		68.03		45.30	a	44.90		40.70	a	54.10
2003	38.68		33.21		42.68		52.20		60.26		66.10		83.68		81.97		68.03		61.61		38.37		40.21	b	55.58
2004	36.90	a	38.66		48.66	b	55.10		60.87		66.67		77.55		73.10		68.07		57.50	a	45.60		41.19		55.82
2005	37.33	a	41.32		43.39		52.87		58.42		71.73		81.61		76.06		73.52	a	57.61		47.47		34.29		56.30
2006	43.94		34.00		40.90		56.23		63.81		74.80		84.00		78.33	a	63.73		52.00		45.76	a	39.39		56.41
2007	33.71		33.11		51.90		48.00		64.81		76.30		83.58		79.35		70.33		57.48		47.14	a	32.74		56.54
2008	32.00		36.79		39.84		48.00	c	57.63	d	67.59	a	78.81		77.97		66.30		54.35		46.27		31.55		53.09
2009	37.39		37.57		44.65		46.27		61.58		65.70		73.65		74.68		70.40		42.39		51.66	a	26.39	c	52.69
2010	38.20	a	30.71		47.81		49.87		56.68		69.43		77.32		80.06		71.90		61.03		40.80		38.52		55.19
2011	32.81		31.79		41.77		47.93		53.55		71.10		81.19		78.74		69.80		57.81		44.30		38.94		54.14
2012	40.48		34.59		57.06		56.90		63.00		78.20		85.45		80.13		74.93		53.61		49.37		36.97		59.22
2013	38.10		36.50		42.39		42.93		61.52		71.10		78.23		77.68		72.62	a	49.81	d	45.90		31.97		54.06
2014	37.00		27.61		42.52		50.90		60.10		67.27		76.26		73.97		68.20		59.94		39.87		38.42		53.50
2015	42.23		37.82		51.84		53.50		53.90		71.77		77.87		77.61		73.80		58.94		44.57		36.87		56.73
2016	39.19		42.72		48.71		52.50		60.13		78.57		80.40	a	75.84		68.10		61.03		53.63		30.03		57.57
2017	32.94		43.54		48.58		50.80		60.68		74.17		82.97		74.10		68.17		55.87		48.57		33.48		56.15
2018	39.35		30.96		43.00		48.00		65.26		73.03		76.61		74.90		68.52	a	52.00		41.47		37.00		54.18
2019	37.90		22.79		37.39		49.10		50.65		70.33		77.19		73.97		69.83		47.32		41.83	a	41.26		51.63
2020	38.52		35.59		44.10		49.90		57.83	a	76.63		79.70	d	82.03		70.00		52.90		50.90	a	42.07	a	56.68
2021	37.07	a	23.39		45.16		50.57		57.48		78.00		82.52		79.39		74.19	c	59.48		52.55	a	40.26		56.67
2022	39.57	a	36.33	a	44.14	b	46.77		58.84		74.47		83.65		80.77	a	74.27		58.76	b	39.70		33.45		55.89
2023	32.81		37.93		33.58		48.63		65.43	a	70.07		77.16		76.84		71.37		52.90		47.60		42.50	a	54.73
2024	31.84		41.83		42.10		51.87		58.74		73.30		80.35		79.39		78.40		64.23		45.70		42.81		57.55
2025	30.74		28.14		47.84		52.13		61.23		72.63		77.23		76.61		72.07		59.03		49.97		-----	z	57.06	a
Period of Record Statistics
MEAN	35.83		37.09		43.96		51.68		61.66		72.67		80.41		78.86		70.22		57.03		44.78		36.89		55.90
S.D.	4.50		5.43		5.04		4.26		4.40		4.09		3.80		3.37		4.26		4.69		4.81		4.60		1.78
SKEW	-0.17		-0.70		-0.29		0.37		-0.06		0.09		-0.24		0.16		-0.84		-0.58		-0.39		-0.75		-0.38
MAX	46.23		45.71		57.06		62.66		72.13		84.77		88.97		87.35		78.40		67.90		56.07		46.13		59.22
MIN	24.13		22.79		30.84		42.93		50.65		63.10		70.03		72.77		55.13		42.39		29.17		21.65		51.21
YRS	62		64		63		64		63		64		64		62		63		64		64		63		56