WILLOW RESERVOIR, WI

Average of Average Temperature (Degrees Fahrenheit)

(479236)

File last updated on April 23, 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
1934	-----	z	-----	z	-----	z	38.67		60.08		67.52		68.87		62.25	a	55.47		47.94		35.50		15.95	a	50.25	c
1935	10.37	a	18.39		29.50	a	39.47		50.00		58.62		73.10		65.35		55.03		44.77		29.09	b	21.72	b	41.28
1936	11.13	a	3.84		28.55	b	36.00		59.56		61.68		73.02		66.56		60.81	a	41.95		26.69	a	20.15		40.83
1937	7.65		13.16		20.89		36.68		54.65		62.03		69.78	b	69.50	c	57.04	b	41.77		28.80	c	14.33	a	39.69
1938	10.74	b	18.68	c	31.82	a	42.13	c	52.50	b	61.14	b	66.85		68.61	i	56.10	i	48.98	a	32.72	e	16.66	c	38.22	b
1939	16.71	c	8.48	b	24.00	f	38.63	g	55.87	h	63.39	p	67.22	b	65.42		62.93	a	43.84	c	32.71	f	30.00	j	44.10	f
1940	7.80	c	15.07	h	16.75	a	36.18		48.37		61.32		66.42		62.98		57.75		47.50	a	28.81	a	19.38	a	41.21	a
1941	18.68	n	14.64		20.98	a	46.90	a	56.73		63.84	a	66.68	a	63.19		58.80		45.18	a	33.63		24.33	d	44.99	a
1942	14.75	c	14.56	b	29.22	b	45.12	a	51.60	e	62.25		66.19		64.53	b	53.45	a	45.85	a	30.13		13.52	a	40.93
1943	7.98		14.07		16.88	a	35.50		50.41	b	65.48	a	69.24		65.95	a	53.21	a	51.47	o	25.92		19.03		38.52	a
1944	22.18	a	17.05	a	21.13		36.37		56.35		64.55	b	66.24		66.55		57.28		46.10		36.63		15.53		42.16
1945	8.89		14.32		35.45		40.22		47.65		56.95		64.42		64.52		56.17		43.53		29.78		13.78	a	39.64
1946	15.16		12.84		37.27		43.00		51.05		61.78		67.40	b	63.52	c	56.40	f	48.93	h	30.41	g	18.42	a	41.16	c
1947	16.90		11.70	a	21.84		36.75		47.78	a	59.65		66.98		72.23		58.52		55.02		26.43		18.53	a	41.03
1948	6.15	a	12.03		23.81		43.84	a	52.55		62.00	a	67.90		66.50		60.32		45.68		33.95		16.07	k	43.16	a
1949	17.03		14.79		-----	z	42.36	a	-----	z	65.27		68.68		66.16		54.00		48.66		31.67		18.53		42.71	b
1950	8.97		14.62		19.90		31.05		49.48	a	60.95		61.89		60.16		55.77		49.59	d	26.58		12.08		37.59
1951	9.81		15.55		22.39		38.83		57.16		59.48		66.35		61.63		53.95		46.08		23.48		15.13	a	39.15
1952	15.12	a	19.90		22.82		43.50	a	53.21		64.93		68.65		63.74		58.77		40.27		33.37		24.23		42.37
1953	17.80	a	15.34		27.87		37.17		54.03		64.40		66.55	a	65.83	b	56.61	b	54.41	o	35.57	a	18.71	l	44.12	b
1954	10.02	h	28.08	d	23.48	c	42.41	c	47.61		64.73	d	64.63	l	62.45	a	55.30		43.87		33.88		19.27		42.11	b
1955	9.85	a	13.39		21.08		47.62		56.52		61.85		72.15	a	68.30	a	56.78	a	47.55		24.59	b	13.12	a	41.07
1956	14.27		12.21	a	21.50		38.48		52.35	a	65.00		63.21		64.47		53.90		51.79		31.05		19.87	a	40.68
1957	6.45		16.59		25.16		41.55		52.73		62.62		68.76		63.77		54.27		45.05		30.91	a	18.76		40.55
1958	17.84		11.89		26.81		42.90		52.15		58.09	b	64.71		64.50		57.53		48.05	a	32.41	a	8.18	a	40.42
1959	4.40		10.18		24.39		40.78		57.66		64.00		66.87		69.10		58.43		41.89		21.83		24.81		40.36
1960	14.26		16.41	a	15.55		41.75		52.63		60.45		65.94		67.05		58.48		46.47	a	34.28		15.66		40.74
1961	11.52		21.50		29.77		38.14	a	50.32		63.85		66.61		67.05		57.62	a	47.87		29.33		16.31		41.66
1962	8.18		10.75		26.90		39.87		57.82		62.55		64.97		64.77		53.88		47.84		32.25		15.84		40.47
1963	1.76		6.95		27.92		43.78		51.44		64.57		68.10		62.65		56.43		53.44		34.75		8.42		40.02
1964	16.63		15.41		22.03		40.63		58.62	b	62.28	a	68.77	a	61.26	b	54.57		43.32		33.47	a	11.74		40.73
1965	7.67	a	9.43		17.63		37.90		57.75	k	60.78		63.63		62.77		50.38	a	46.13		29.90		23.24		37.22	a
1966	-1.42	m	15.34		29.15		37.00		47.66		64.27		69.55		61.45	a	56.78		44.84		30.14	a	17.35	a	43.05	a
1967	16.25	a	7.46		26.16		40.48		47.73		63.53		64.69		61.65		55.70		44.21		27.20		18.34		39.45
1968	11.35		10.97		33.66		44.00		50.85		62.40		66.82		65.11		57.95		48.84		31.22		15.94		41.59
1969	11.44		15.68		20.15		43.92		55.18		56.15		66.16		68.23		57.37		43.10		30.17		17.47		40.42
1970	5.19		12.39		21.27		42.18		54.21		64.88		70.03		66.27		58.00		48.53		29.95		16.58		40.79
1971	4.26		13.66		21.32		39.85		49.69		65.67		63.77		62.39		58.62		52.52		31.05		17.97		40.06
1972	4.32		8.29		21.82		35.85		56.95		60.93		65.61		65.29		52.90		39.02		28.37		9.65		37.42
1973	11.98		15.56	a	34.40		38.47		47.50	a	62.65		66.23		65.34		55.00		49.35		30.38		13.47		40.86
1974	7.28	a	6.77		23.73		38.67		48.27		57.53		67.35		61.89		48.82		42.44		31.72		19.92		37.87
1975	11.97		12.88		18.98		32.85		56.55		61.43		67.95		63.13		50.73		45.42		33.77		14.15		39.15
1976	4.73		19.16		21.85	a	42.47		49.24		64.28		66.47		62.65		51.63		37.32		21.21	b	4.15		37.10
1977	-3.39		13.66		30.82		43.75		61.18		59.82		67.94		58.69		55.05		43.81		29.50		13.65		39.54
1978	5.90		6.21		20.55		37.70		54.19		60.12		63.35		64.19		58.18		43.66		27.62		9.85		37.63
1979	-1.29		3.91		22.94		36.40		47.42		59.67		65.82		61.47		55.57		40.98		28.88		19.10		36.74
1980	8.08		8.67		19.52		41.27		55.71		59.97		66.39		63.89		47.50	n	39.00		29.63		12.02		36.74	a
1981	9.00		16.61		26.79		40.88		49.82		60.09	b	64.06		63.87		51.75		38.65		32.48		14.79		39.07
1982	-1.93	a	11.29	d	21.18		32.38		56.18	a	54.88	a	67.03		62.38	b	53.72		46.17	g	28.83		22.27	c	37.11	a
1983	14.45	a	22.98	a	26.97	a	35.65		45.89		60.52		69.95		67.77		56.75		44.31		34.53	o	-----	z	44.52	b
1984	1.66	i	-----	z	18.78	a	43.44	c	48.57	b	62.48	d	63.45	b	65.09	b	51.88	b	46.77	i	27.91	g	16.30	f	50.53	e
1985	6.45	b	12.65	e	29.07	c	43.63	d	54.75	a	57.45	k	61.40		59.88	a	53.90	a	40.43	q	21.44	c	3.05	a	34.62	b
1986	9.81		9.66		24.55	a	43.92		54.81		59.65		65.45		58.89		53.57		41.73	a	23.00		17.29		38.53
1987	15.28	a	20.09		30.05	a	42.98		51.71		61.20		63.84		59.65	a	56.67		38.68		32.85		22.23	a	41.27
1988	5.94		7.36		24.16		40.42		56.17	a	64.95		69.23		67.00		55.63		38.12	a	31.33		15.95	a	39.69
1989	15.40		4.38		17.68	a	36.20		52.47	b	59.52		67.60		64.02		55.12		45.30	a	24.52		3.48		37.14
1990	18.82		13.96		27.23		42.10		49.65	a	61.25		65.18		62.58	s	52.35	m	41.86	b	33.47		14.62	a	36.81	b
1991	6.32		15.41	a	25.72	a	41.95		56.26		-----	z	65.68	a	66.43	a	52.50	b	42.11		24.27		13.22	m	39.67	b
1992	15.85		19.12		24.24		35.85		53.24		57.64	b	60.63		60.24		53.23		43.50	a	27.39	b	17.42		39.03
1993	10.29		13.25		20.25	m	35.00		51.18		58.78		65.00		64.47	b	49.21	a	39.82	c	26.57	a	18.35		39.27	a
1994	-1.21		7.56	a	26.34	l	37.82		52.27		63.74	a	64.27	a	61.95		58.77		47.97	m	32.02	j	21.83	a	40.78	c
1995	12.81	b	13.31	a	27.53	a	33.25		51.10	a	67.50	a	66.33	a	68.24		53.71	a	45.80	c	18.72	n	11.98		41.05	a
1996	5.32	a	9.70	a	15.83	a	32.70	b	48.65		62.30	b	62.58		64.66		55.95		44.53	a	24.17		16.93	c	36.94
1997	8.53		16.26	c	19.25	m	35.84	a	45.78	b	64.34	b	64.98		60.83	a	56.91	b	45.02	a	27.15		23.38	b	40.82	a
1998	16.71	c	28.66		20.74	l	45.28		59.40		61.02	a	67.60		67.07	a	61.38	a	46.77	c	33.71	a	22.97	a	46.41	a
1999	7.92		20.70		26.00	a	43.60		56.16		62.90	a	69.15	a	62.88	b	55.62		42.55	b	37.08		19.15		41.97
2000	9.98	a	19.00	a	33.63	a	39.50	a	55.03		60.23		65.40		65.16		55.97		48.31	b	31.05		6.28	b	40.80
2001	16.24		10.04		23.25	a	41.73		55.15		62.95		67.75	a	67.87	a	56.18		44.42		39.87	c	24.65		42.51
2002	20.95		22.50		18.00	e	37.09	a	46.90	a	63.60	a	70.93	b	65.43	a	59.29	a	41.89	h	26.19	l	21.82		42.65	b
2003	10.35	a	8.50	a	23.69		37.80		51.81		61.00		66.70	a	68.84		58.00		44.87	a	29.66	a	21.18	a	40.20
2004	5.82	a	15.98		27.60	a	39.32	b	48.48	a	59.05		64.71		59.98		60.91	b	45.41	b	36.25	r	17.03	b	40.39	a
2005	10.03		19.59		20.81	e	45.18		50.66		67.27	b	69.32		67.15		61.33	a	48.90		31.69	a	17.13		42.42
2006	23.44		12.62		28.16	l	46.13		54.53		64.23		71.87	a	66.40		54.78		40.47		33.45		23.28	d	44.66	a
2007	15.56		7.30		27.69	j	38.85		55.94		64.25		66.73	c	65.56		58.90	a	49.40	a	29.70		14.12	a	42.39	a
2008	12.21		8.50	b	19.11		36.10	d	48.16		61.45		66.58		63.91	c	58.07	a	44.48	a	29.18	b	9.39	c	38.10
2009	2.83	a	15.89	a	24.91	b	39.58		51.71		60.88		61.40		62.50	a	59.76	a	39.52		37.38	a	14.60		39.25
2010	13.42	a	15.70	a	31.43	k	47.24	a	56.10		61.46	b	68.92		67.71		52.87		47.03	a	32.91	c	15.29	c	43.51	a
2011	8.60	a	14.43		21.66		36.67	a	50.81		61.27		70.42		65.27	a	55.19	a	47.77		33.74	c	21.42		40.60
2012	16.58		21.41		38.85	k	42.18		55.92		64.56	c	71.27	a	64.19		54.73		42.48		31.37	d	22.32		44.27	a
2013	12.85	a	11.64		19.69	b	32.42		51.77		60.56	c	67.93	d	65.13	e	57.45	b	42.63	e	28.72	c	6.58	a	38.11
2014	1.82		3.73		14.86	c	33.97		53.03	b	63.76	m	63.43	a	62.70	f	54.42		43.16		22.07	a	19.68		31.02	b
2015	10.90	b	2.20		25.11		40.32		52.84		60.33	a	65.55		62.45		61.33	a	45.18	a	37.04	b	28.31	g	42.11	a
2016	12.17	b	18.36		32.76	h	37.91	b	53.21		62.53	a	66.42	a	66.11		59.07	c	48.81	g	37.94	c	16.45		43.02	b
2017	14.74	b	22.16		27.23	p	41.58	f	49.73		62.27		65.68		60.92	g	59.25		47.06		27.65		12.60		40.13	c
2018	11.26		10.25		24.79	e	28.75		59.69		64.27		66.56		65.35		58.02		38.97		23.22		21.58		39.39
2019	9.71		7.89		20.21		37.88		48.66		61.23		68.26		61.87		58.18		42.92		25.02		19.19		38.42
2020	18.00		14.24		29.47		36.47		51.16		63.08		69.27		65.81		53.98		38.00		35.07		20.73		41.27
2021	16.58		6.54		32.21		40.83		50.85		66.27		66.34		65.76		57.98		51.48		31.18		20.66		42.22
2022	5.18		9.61		24.03		34.63		54.94		62.02		65.92		64.35		57.30		44.85		32.32		15.63		39.23
2023	20.10		17.32		23.82		38.28		54.48		63.63		64.53		64.42		59.77		46.89		31.68		29.21		42.84
2024	18.82		26.47		30.05		40.48	h	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	25.11	i
Period of Record Statistics
MEAN	10.81		13.66		24.34		39.46		52.65		62.08		66.74		64.45		56.22		44.84		30.22		16.78		39.98
S.D.	5.60		5.42		4.93		3.91		3.63		2.50		2.53		2.59		2.85		3.71		4.10		5.13		1.58
SKEW	-0.20		0.35		0.40		-0.18		0.20		-0.23		0.15		0.07		-0.21		0.19		-0.22		-0.54		-0.31
MAX	23.44		28.66		37.27		47.62		61.18		67.52		73.10		72.23		62.93		55.02		39.87		29.21		42.84
MIN	-3.39		2.20		14.86		28.75		45.78		54.88		60.63		58.69		48.82		37.32		21.21		3.05		36.74
YRS	86		88		78		88		87		86		89		86		86		81		82		83		55