WEST YELLOWSTONE, MT

Average of Maximum Temperature (Degrees Fahrenheit)

(248857)

File last updated on April 15, 2024
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
1924	22.23	a	36.10		33.52		44.83		60.71		69.10		76.71		75.68		66.62	d	49.89	c	35.63	c	18.90	b	49.16
1925	24.93	c	32.65	e	42.48	f	51.28	l	61.32	f	76.29	p	78.71		73.55		65.14	b	46.67	a	35.71	b	30.76	b	48.52	d
1926	27.85	e	32.71	d	40.17	b	57.12	f	61.87		72.21	b	79.58		75.13		59.71	b	53.32		38.97		24.46	g	54.15	b
1927	25.77	e	29.11	i	36.88	f	45.79	k	52.04	c	69.70		80.48		74.10	a	64.43		54.20	a	36.60		21.50	c	53.20	c
1928	28.25	g	31.24	l	41.32		41.35	d	65.16		62.62	a	78.69	b	76.23		70.86	b	53.18	c	37.69	a	25.90		55.30	b
1929	21.90	k	23.60	c	37.26	d	43.04	c	56.44	d	68.57		80.71		81.55		58.96	g	49.62	b	27.83		25.68		49.43	b
1930	10.52		28.18	f	31.88	f	49.62	d	-----	z	64.27		80.06		75.81		66.10		49.10		38.10		25.88	e	51.05	c
1931	29.36	c	35.24	c	33.71	j	49.53		60.56	o	-----	z	83.00	b	79.90		67.50	n	54.17	b	34.73		25.10		48.88	d
1932	19.26		30.17		35.40	a	49.97		60.16		67.67	c	77.08	e	76.77		69.10		48.27	a	37.63		18.74		49.18
1933	23.61		17.75		37.16		45.23		53.55		75.68	b	86.24	b	77.19		67.50		60.03	b	39.89	b	32.13		51.33
1934	29.77		41.61		46.06		60.83		72.52		69.53		84.13		82.23		63.87		58.65		42.79	a	28.55		56.71
1935	29.87		36.68		35.68		47.23		56.10		71.43		85.68		81.71		73.63		56.42		32.57		30.10		53.09
1936	28.26		30.93		39.30	h	54.27		68.32		75.27		86.55		79.29		69.03	a	55.77		37.68	b	26.11	c	55.59	a
1937	11.46	g	27.62	g	42.08	f	46.85	j	66.24	b	68.93	a	79.81		80.30	a	72.72	a	59.07	c	39.31	d	26.63	d	61.63	d
1938	27.08	g	34.73	f	39.24	f	50.10	a	56.26		72.63		76.87		79.16		75.97		53.23		28.13		26.00		57.59	c
1939	25.55		23.11		41.52		53.37		66.29		67.13		83.42		82.61		70.97		53.73	a	48.80		35.55		54.34
1940	26.06		32.03		42.16		50.79	a	67.71		76.17		81.97		84.61		69.33		57.26		31.70		29.13		54.08
1941	29.32		37.75		43.68		50.03		64.15	e	70.40		79.35		75.23		59.31	a	51.43	a	38.13		29.23		52.34
1942	24.61		29.25		41.39		52.13		54.42		67.37		84.42		82.23		67.93		52.52		32.50		27.58		51.36
1943	22.55		32.50		37.42		53.67		56.35		65.86	a	81.16		79.32		71.93		54.84		40.79	f	28.61		53.11	a
1944	25.26		31.21		36.35		49.27		60.23		63.17		76.90		78.00		64.97		59.94		32.60		26.87		50.40
1945	29.42		33.46		38.39		44.00		58.06		62.03		79.77		74.90		59.73		56.29		33.00		24.42		49.46
1946	25.48		31.68		43.90		54.97		56.65		71.03		82.19		79.77		66.93		41.71		36.14	b	29.26		51.64
1947	23.35		34.00	a	43.71	c	46.83	l	-----	z	62.72	l	82.32		77.23	a	66.60		54.55		30.23		26.58		48.73	c
1948	26.52		28.38		-----	z	46.86	i	60.60	a	68.97	a	77.66	b	76.13		66.93		54.77		27.73		20.00		50.77	b
1949	12.13		25.61		38.03	a	53.13		60.65		67.67		79.45		78.55		66.72	a	43.77		42.11	b	22.88	f	51.62	a
1950	17.90	b	31.18		33.74		44.27		54.10		67.87		74.32		75.71		64.67		54.65		34.87		30.97		48.69
1951	20.84		32.04		34.03		48.57		60.33	a	60.87		77.58		71.16		65.69	a	46.13		33.03	a	21.35		47.64
1952	22.06		29.10		33.71		53.60		59.32		68.76	a	75.97		77.39		74.30		62.68		33.03	a	27.39	c	51.44
1953	30.94		29.71		41.00	b	43.93		52.45		66.80		83.81		79.60	a	72.07	a	59.17	a	40.93		24.94		52.11
1954	27.00		36.07		36.79	c	48.10		61.42		62.20		80.65		75.23		68.47		53.97		43.17		24.63	a	51.47
1955	21.68		25.64		30.35		42.77		57.16		66.30		79.10		80.39		65.50		53.45	b	28.00		27.00	b	48.11
1956	27.81		24.48		37.52		50.30		62.35		73.10		79.84		75.35		70.23		52.00		33.41	a	27.13		51.13
1957	19.23		35.36		39.23		46.03		59.81		67.24	a	80.42		78.45		68.20		51.52		32.83		29.23		50.63
1958	28.74		37.89		38.81		45.03		69.90		70.17		75.55		79.84		65.20		59.29		33.97		31.52		52.99
1959	26.58		30.79		37.87		48.57		52.94		73.40		80.48		77.71		62.50		50.58		34.50		29.00		50.41
1960	24.26		26.62		40.65		49.47		57.52		71.60		84.81		74.58		70.43		51.48		33.80		26.84		51.00
1961	28.74		33.25		39.77		44.73		59.84		77.40		82.65		79.52		55.30		49.29		34.13		22.23		50.57
1962	20.06		30.18		36.13		51.47		57.71		69.33		75.55		73.74		68.37		58.74		39.57		28.47	a	50.78
1963	17.10		39.21		39.90		44.47		59.26		64.57		79.03		80.16		70.07		58.77		34.93		24.81		51.02
1964	22.40	a	26.76		32.35		45.20		58.33	a	63.00		82.52		73.35		65.20		57.90	a	35.03		23.81		48.82
1965	26.23		29.93		35.26		48.53		54.74		66.13		77.32		73.81		54.30		60.19		40.53		27.32		49.52
1966	25.10		29.07		40.42		45.43		65.13		68.47		84.58		76.42		69.60		49.29		35.70		24.35		51.13
1967	25.65		29.36		33.87		40.70		56.77		65.40		79.19		81.35		69.67		49.97		35.76	a	19.65		48.94
1968	23.26		33.83		41.87		43.07		55.32		65.20		81.65		68.94		61.60		49.77		31.40		22.74		48.22
1969	25.10		29.32		35.90		49.57		66.45		65.67		79.26		82.53	a	69.73		44.13		36.20		27.29		50.93
1970	25.13		35.86		34.90		39.63		57.16		70.80		79.23		82.48		57.97		46.61		34.17		22.58		48.88
1971	22.97		28.50		32.19		44.73		58.39		67.60		78.19		82.97		57.93		47.13		32.83		20.45		47.82
1972	20.58		29.00		40.19		44.37		60.55		69.13		75.48		76.71		57.73		49.77		32.80		17.77		47.84
1973	21.74		33.32		36.84		42.30	c	60.03		66.83		77.94		76.10		60.80		52.03		31.40		25.42		48.73
1974	20.90		25.33	s	34.71	c	46.27		54.23		74.77		81.10		73.81		68.93		54.97		34.63		22.29		51.51	a
1975	20.58		26.39		32.61		37.63		51.06		63.93		79.94		71.13		69.33		49.13		30.33		25.65		46.48
1976	24.84		29.48		32.94		45.07		61.10		68.00		80.52		72.55		66.20		50.93	a	29.77	q	24.58		50.56	a
1977	21.03		34.96		32.89	d	55.03	a	54.16		75.00		77.00		72.61		62.63		53.10	b	32.17		25.87		49.71
1978	26.48		31.44	a	43.06		45.50		54.42		70.03	a	76.68		74.32		62.87		55.87	a	29.53	k	14.89	m	54.07	b
1979	16.00	k	27.00	g	-----	z	52.83	x	59.23	a	71.10		80.84		74.65		73.03		54.13		30.55	a	29.52		59.13	d
1980	22.26		-----	z	36.07	p	40.33	x	57.19		66.00		76.10		69.65		63.40		52.29		36.97		31.00		52.76	c
1981	31.32		31.57		43.10	a	48.00		55.68		65.67		78.10		82.26		70.13		47.45		39.90		25.71		51.57
1982	20.97		26.70	a	36.29		40.73		55.63	a	67.23		74.03		80.03		63.17	a	46.03		29.30		22.74		46.91
1983	27.19		31.93		36.68		41.83		55.42		64.77		73.06		78.33	a	64.72	a	51.71		32.30		16.50	c	47.87
1984	21.42		27.86		35.43	a	42.37		54.96	c	64.70		78.23		75.81		62.07	b	45.20	a	33.72	a	21.58		46.95
1985	22.84		24.21		35.80	a	49.80		60.81		69.27		78.65		72.13	a	56.14	b	49.00	a	19.83	l	24.58		49.38	a
1986	31.45		32.79		44.50	a	45.76	a	57.84		73.37		71.19		78.73	a	-----	z	53.13		33.57	b	26.68		49.91	a
1987	24.71		35.68		39.35		56.13		61.32		69.39	g	71.97	a	70.68	c	70.47		58.45		36.03		24.42		49.93	a
1988	21.84		32.55		36.57	a	49.35	d	61.87		77.30		83.03		79.77		65.68	b	61.39		30.86	a	21.35		51.80
1989	22.93	a	24.32		37.74		44.43	i	56.87		70.12	d	82.61		73.53	a	67.60		53.39	h	34.57	g	24.57	c	51.14	c
1990	26.40	a	27.96	a	41.17	a	51.67		55.73	a	68.00		78.32		78.06		74.40		47.47	a	33.89	c	15.19	e	49.86
1991	23.00	a	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	81.00		67.07		51.24	f	28.96	b	21.71		44.35	g
1992	25.81		35.55		46.77		54.72	a	68.35		71.47		72.97		74.95	l	63.87		54.84		28.07		20.56	d	49.36	a
1993	17.89	l	24.71	n	39.42		44.23		64.23		64.71	b	67.23		72.45		66.87		51.40	a	30.00	a	25.73	i	55.62	c
1994	27.20	a	27.37	a	42.40	a	51.43		65.03		74.13	o	80.19		83.27	a	73.50		47.35		25.62	a	24.67	a	49.82	a
1995	22.68		32.54		36.27	a	45.10		56.10		66.28	a	75.19		77.00	h	-----	z	46.81		36.83		25.00	b	44.28	b
1996	21.63	d	26.86	a	37.31	b	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	28.60	i
1997	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1998	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1999	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2000	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	82.00	v	80.80	u	65.58	r	49.43	x	27.55	s	-----	z	-----	z
2001	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	36.86	w	20.08	s	-----	z
2002	21.38	o	29.24	k	31.95	l	43.85	q	59.71	g	68.43	i	83.88	g	74.05	k	66.68	e	49.35	e	32.54	q	26.56	o	58.01	j
2003	31.89	m	27.46	d	38.52	f	47.04	e	51.30	k	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	37.25	j
2004	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2005	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2006	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2007	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2008	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2009	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2010	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2011	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2012	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2013	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
Period of Record Statistics
MEAN	24.18		30.79		38.09		47.62		59.29		68.59		79.22		77.22		66.38		52.55		34.57		25.30		50.30
S.D.	4.02		4.34		3.73		4.60		4.66		3.85		3.64		3.67		4.80		4.67		4.27		3.89		2.13
SKEW	-0.76		-0.16		0.24		0.33		0.68		0.35		-0.49		-0.12		-0.45		0.03		0.55		-0.21		0.54
MAX	31.45		41.61		46.77		60.83		72.52		77.40		86.55		84.61		75.97		62.68		48.80		35.55		56.71
MIN	10.52		17.75		30.35		37.63		51.06		60.87		67.23		68.94		54.30		41.71		25.62		15.19		46.48
YRS	67		64		62		63		67		66		71		70		69		71		67		68		44