MOUNT RUSHMORE NATIONAL MEMORIAL, SD

Total of Snowfall (Inches)

(395870)

File last updated on December 4, 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)	JUL		AUG		SEP		OCT		NOV		DEC		JAN		FEB		MAR		APR		MAY		JUN		ANN
1961-62	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	10.50	a	8.00		1.10		0.00		0.00		19.60	g
1962-63	0.00		0.00		0.00		0.00		0.10		1.10		7.60		9.60		23.20		26.20		0.00		0.00		67.80
1963-64	0.00		0.00		0.00		2.60		0.00		4.60		6.80		10.40		16.00		12.00		0.00		0.00		52.40
1964-65	0.00		0.00		0.00		0.00		1.00		15.40		9.30		2.00		20.00		11.50		22.50		0.00		81.70
1965-66	0.00		0.00		8.30		0.00		1.50		0.80		6.00		15.10		12.70		40.60		0.20		0.00		85.20
1966-67	0.00		0.00		0.00		7.60		6.60		15.50		5.50		7.00		14.60		5.00		5.00		0.00		66.80
1967-68	0.00		0.00		0.00		0.00		6.00		13.00		9.50		4.50		4.50		8.50		0.00	a	0.00		46.00
1968-69	0.00		0.00		0.00		0.00		5.60		11.70		5.10		18.60		10.30		1.00		0.00		0.00	a	52.30
1969-70	0.00		0.00		0.00		8.50		7.50		5.50		2.70	a	2.90		25.10	a	50.00		0.00		0.00		102.20
1970-71	0.00		0.00		0.00	b	0.00	b	-----	z	-----	z	12.50		18.00		37.00		18.50	a	0.00		0.00		86.00	b
1971-72	0.00		0.00		1.50		11.00	a	11.90		6.00	a	3.50		5.00		4.30		15.80		0.00		0.00		59.00
1972-73	0.00		0.00		0.00		2.90		1.50	a	-----	z	2.00		4.50	a	5.00	g	3.50		0.50		0.00		14.90	b
1973-74	0.00		0.00		0.00		1.50		16.50		13.00		10.00		3.00		1.00		-----	z	0.00		0.00		45.00	a
1974-75	0.00		0.00		0.00		0.00		2.50		3.10		10.10		9.50	b	19.50		7.50		-----	z	0.00		52.20	a
1975-76	0.00		0.00		0.00		8.00		9.00	b	10.00	a	5.50		11.00		2.00		23.00		0.00		0.00		68.50
1976-77	0.00		0.00		0.00		1.00		4.00		3.00		5.00		5.00		30.50	b	5.50		0.00		0.00		54.00
1977-78	0.00		0.00		0.00		1.50		11.00		1.50	p	8.50		15.00	a	3.00		2.20		8.00		0.00		49.20	a
1978-79	0.00		0.00		0.00		0.00		15.00		8.00		5.50		7.00		5.50		11.50		5.00		0.00		57.50
1979-80	0.00		0.00		0.00		6.00		5.00		1.50		5.50	a	5.00		11.00		9.50		1.00		0.00		44.50
1980-81	0.00		0.00		1.50		3.00		5.50		9.50		1.00		1.50		0.50		1.00		0.00		0.00		23.50
1981-82	0.00		0.00		0.00		0.00		0.00	c	10.50		10.50	a	5.00		8.50		5.50	a	0.50		0.00		40.50
1982-83	0.00		0.00		0.00		0.00		0.00	a	6.50		4.00		0.00		17.00	a	9.00		5.00		0.00		41.50
1983-84	0.00		0.00		0.00		4.00		14.50		4.00		1.00		4.00		2.00		41.00		0.00	a	0.00		70.50
1984-85	0.00	a	0.00		3.00		2.00		6.50		4.00		5.00		0.00		8.00		2.50		0.00		0.00		31.00
1985-86	0.00		0.00		3.50		2.00		30.00		9.50		1.00	a	6.00	a	6.50		16.50		0.00		0.00		75.00
1986-87	0.00		0.00		0.00		0.00		9.00		0.00		1.00		20.50		13.00		0.00		0.00		0.00		43.50
1987-88	0.00		0.00		0.00		4.50		0.00		7.00		8.00		4.00		4.00		11.00		0.00	a	0.00		38.50
1988-89	0.00		0.00		0.00		0.00		7.00	c	4.00		1.00		17.00	a	6.50	b	2.50		0.00		0.00		38.00
1989-90	0.00		0.00		0.50		5.00	a	0.50	b	10.00	b	0.30		6.00	a	18.50		0.00		1.00		0.00		41.80
1990-91	0.00		0.00		0.00		3.50		5.80		8.50		3.00	a	7.50		5.00		15.00		5.00		0.00		53.30
1991-92	0.00		0.00		0.00		6.50		10.00	a	0.00		3.00	a	2.00		8.00		0.50	b	0.00		0.00		30.00
1992-93	0.00		0.00		0.00		1.00		1.00	a	11.00	b	16.50		14.00	a	10.50		18.00	b	0.00		0.00		72.00
1993-94	0.00		0.00		0.00		2.50		10.30		8.50	a	7.50		12.00		11.00		16.00		0.00		0.00		67.80
1994-95	0.00		0.00		0.00		0.00		9.00		8.00	a	0.00		15.00		13.50	a	18.00	a	4.00	a	3.00		70.50
1995-96	0.00		0.00		4.00		16.00		3.00	a	2.00		19.00		2.00	a	15.00		15.00		1.10		0.00	c	77.10
1996-97	0.00		0.00		5.00		19.00		6.50		26.00		3.50		13.00		6.00		23.00		3.50		0.00		105.50
1997-98	0.00		0.00		0.00		2.00		0.80		4.00		10.60		8.30		24.00		0.50	a	0.00		0.00	a	50.20
1998-99	0.00		0.00		0.00		7.00		14.00		1.00		14.00	b	1.00		10.80		10.50	a	0.00		3.00		61.30
1999-00	0.00		0.00		0.00	c	0.00	b	0.80		2.00		8.00		6.50		6.00		35.00		0.00		0.00		58.30
2000-01	0.00		0.00		2.00		1.00	a	5.00	a	5.00	a	7.00		17.50	a	5.80		20.80		0.00		0.00		64.10
2001-02	0.00		0.00		0.00		0.00		7.00		2.00		1.00		4.00	a	18.00	a	8.50	b	8.50	b	0.00		49.00
2002-03	0.00		0.00		0.00	b	-----	z	1.00		0.90		9.50		9.10	a	4.50		7.00		2.00		0.00		34.00	a
2003-04	0.00		0.00		0.00		4.00		20.50		5.00		9.00		10.30		0.00	b	7.50	b	0.00		0.00		56.30
2004-05	0.00		0.00		0.00		1.00		4.30		0.50		7.50		3.60		6.40		1.50		10.00		0.00		34.80
2005-06	0.00		0.00		0.00	a	1.00		0.50	a	1.20	a	1.80		5.00	q	37.10	a	6.10	a	0.00		0.00		47.70	a
2006-07	0.00		0.00		0.00		2.00		5.50		2.20		2.40		9.00		6.00		1.20		0.00		0.00		28.30
2007-08	0.00		0.00		0.00		0.00		1.00		10.30		5.60		3.60	a	4.10	b	2.80	g	8.00	j	0.00		24.60	b
2008-09	0.00		0.00		0.00	a	0.00		6.20		7.90		6.10	a	5.90		15.60		14.70	a	0.00		0.00		56.40
2009-10	0.00		0.00		0.00		19.40		0.30	a	5.90	a	0.30	c	6.00		4.50		9.20		2.00	a	0.00		47.60
2010-11	0.00		0.00		0.00		0.00		6.40		7.90		7.40	e	19.40	d	17.30	u	3.80	m	-----	z	0.00	f	41.10	d
2011-12	0.00	o	0.00	l	0.00		0.00	f	16.20	h	6.00	v	2.70		4.30		-----	z	0.00	g	0.00	w	-----	z	7.00	i
2012-13	-----	z	0.00	s	0.00	o	1.70	i	2.80	i	3.50		8.30		5.20		11.00	a	36.80		0.00		0.00		64.80	e
2013-14	0.00		0.00		0.00		2.00	c	6.70		6.70		8.10		12.20		12.70		6.50		0.50		0.00		55.40
2014-15	0.00		0.00		8.10		0.00		8.30		7.00		4.70		3.60		2.30		0.00		12.20		0.00		46.20
2015-16	0.00		0.00		0.00		0.00		7.00		10.50		2.20		7.00		4.50		2.40		0.00		0.00		33.60
2016-17	0.00		0.00		0.00		0.00		1.70		10.60		15.10		13.80		0.40		9.90		0.00		0.00		51.50
2017-18	0.00		0.00		0.00		0.30		2.30		15.40		7.30		22.50		16.90		10.30		0.00		0.00		75.00
2018-19	0.00		0.00		0.00		9.20		5.60		18.20		4.50		11.20		17.40		13.90		28.80	a	0.00		108.80
2019-20	0.00		0.00		0.00		13.60		12.60		4.20		6.10		15.10		16.90		11.80		0.00		0.00		80.30
2020-21	0.00		0.00		4.50		12.40		2.50		3.00		2.80		10.80		17.10		16.50		0.00		0.00		69.60
2021-22	0.00		0.00		0.00		8.20		0.00		11.90		1.10		8.60		5.60		8.20		0.00		0.00		43.60
2022-23	0.00		0.00		0.00		0.00		2.60		5.70		11.70		10.30		24.50		20.80		0.00		0.00		75.60
2023-24	0.00		0.00		0.00		0.40		2.40		7.20	a	4.10		6.00		7.90		1.10		0.20		0.00		29.30
2024-25	0.00		0.00		0.00		3.70		0.20		1.60		2.60		7.40		9.60		3.00		0.00		0.00		28.10
2025-26	0.00		0.00		0.00		0.00		2.80		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	2.80	g
Period of Record Statistics
MEAN	0.00		0.00		0.67		3.39		5.76		6.82		5.99		8.50		11.33		11.85		2.11		0.10		56.95
S.D.	0.00		0.00		1.79		4.81		5.68		5.12		4.18		5.45		8.49		11.14		5.20		0.53		19.90
SKEW	0.00		0.00		3.01		1.78		1.73		1.12		0.83		0.64		1.11		1.47		3.55		5.29		0.59
MAX	0.00		0.00		8.30		19.40		30.00		26.00		19.00		22.50		37.10		50.00		28.80		3.00		108.80
MIN	0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		23.50
YRS	62		62		63		61		61		59		63		63		61		60		60		62		52