WILLOW RESERVOIR, WI

Average of Minimum Temperature (Degrees Fahrenheit)

(479236)

File last updated on April 19, 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	28.33		44.00		52.80		53.42		48.03	a	43.63		38.16		28.53		7.94		38.32	c
1935	-0.73	a	8.46		18.74		26.73		35.58		45.73		59.61		52.84		42.30		34.58		22.30		13.97	b	30.01
1936	2.20	a	-8.07		20.00		25.23		46.32		46.57		56.00		53.77		47.70		32.61		18.31	a	10.74		29.28
1937	-5.26		2.68		8.52		27.73		41.87		49.87		57.34	b	57.45	b	45.76	a	34.03		21.34	a	4.77	a	28.84
1938	2.23		7.21		18.55		30.66	a	41.29		49.48	a	57.10		57.65	e	43.46	f	37.26		24.71	b	7.36	c	30.32	a
1939	6.30	a	-5.68		9.75	c	25.00	d	40.64	f	50.56	l	54.77	a	52.13		46.13		34.93	b	21.71	b	18.96	d	26.40	b
1940	-1.86	c	4.96	d	4.23		24.30		36.32		49.17		53.10		52.84		45.30		37.52		21.59	a	11.53	a	28.25
1941	7.24	f	3.57		9.19		33.41	a	43.29		50.66	a	53.70	a	50.84		48.60		35.68		26.10		16.86	b	33.81	a
1942	5.79	b	5.00	a	20.52	b	30.50		39.27	a	52.37		56.45		53.40	a	43.59	a	33.57	a	20.83		7.26		30.71
1943	-2.29		0.96		5.23		24.47		38.29		56.33		56.45		55.43	a	42.67		38.38	o	19.43		9.74		27.88	a
1944	13.84		8.72		12.42		25.40		44.26		52.75	b	54.32		53.84		47.53		33.16		29.77		7.55		31.96
1945	-0.19		2.11		23.16		29.23		35.48		45.13		52.68		52.23		44.30		32.03		22.90		5.39		28.70
1946	5.81		1.96		26.03		30.53		36.97		50.00		54.55		50.80	a	43.83	a	38.07	d	22.67	c	9.43	a	30.89
1947	6.65		1.56	a	10.71		26.90		36.63	a	47.73		53.90		58.90		46.87		42.42		19.33		9.35		30.08
1948	-6.74		-0.72		11.32		30.48	a	37.16		49.07	a	54.06		51.74		43.73		31.87		27.37		7.19		28.05
1949	7.39		3.46		-----	z	27.40		-----	z	54.13		56.55		52.97		42.70		37.13		22.97		8.52		31.32	b
1950	-4.65		2.89		7.84		21.63		36.74		49.60		50.81		46.81		44.33		36.94		18.03		1.71		26.06
1951	-1.39		4.18		12.26		28.97		43.58		47.20		55.29		51.19		43.87		36.74		14.57		7.23		28.64
1952	2.35		7.52		11.16		28.70		38.84		53.13		57.74		51.87		46.13		26.84		23.20		16.39		30.32
1953	9.00		3.11		17.97		27.47		38.00		50.80		53.33	a	53.38	b	44.36	b	37.39	h	24.41	a	11.41	i	32.18	b
1954	-0.15	d	15.12	c	11.64	c	28.56	c	35.26		52.19	d	50.00	k	50.10	a	46.00		34.26		25.97		11.39		28.21	a
1955	-1.17	a	2.57		8.19		34.93		41.39		49.10		59.47	a	56.06		43.86	a	37.16		15.82	b	3.45		29.24
1956	1.87		-1.64	a	9.03		27.87		38.61		51.60		52.39		53.74		41.83		38.74		23.23		10.50	a	28.98
1957	-3.52		5.14		12.32		28.93		38.06		50.87		56.03		50.39		40.83		33.65		24.30		9.48		28.87
1958	9.77		1.11		15.74		29.37		37.26		44.36	b	52.39		51.61		47.17		38.37	a	23.72	a	-1.73	a	29.09
1959	-7.39		-3.43		11.68		29.33		44.26		51.40		54.42		58.52		47.10		33.06		13.50		17.32		29.15
1960	5.48		5.32	a	0.29		31.10		40.74		47.83		52.65		55.16		48.50		35.58		27.00		6.39		29.67
1961	0.74		9.21		19.35		27.86	a	36.26		50.97		54.61		54.84		47.38	a	36.81		20.07		7.19		30.44
1962	-1.65		-0.07		15.84		28.07		47.19		49.77		53.55		51.97		43.30		38.00		25.83		7.06		29.91
1963	-7.42		-5.29		15.48		30.83		38.16		50.67		54.35		49.19		43.53		39.55		25.23		-1.52		27.73
1964	5.16		0.83		10.39		27.17		45.00	a	49.23		56.00		49.65		44.10		31.81		24.66	a	2.13		28.84
1965	-2.55		-3.25		6.45		28.17		44.17	b	48.00		51.42		50.68		39.80		35.65		21.93		16.65		28.09
1966	-9.42		4.68		18.94		26.97		34.74		50.87		56.71		52.00		44.67		34.03		24.24	a	10.00	a	29.03
1967	7.00		-5.11		14.55		29.17		35.03		52.03		52.71		48.87		42.57		35.32		20.40		9.77		28.53
1968	1.03		-1.45		21.55		31.53		38.90		51.83		55.84		52.81		49.10		40.39		24.43		7.87		31.15
1969	2.52		2.93		6.65		31.40		42.65		46.17		54.58		55.03		45.90		34.90		22.00		9.42		29.51
1970	-5.61		-0.93		8.26		30.90		42.74		52.03		57.32		52.23		47.13		39.45		23.43		8.00		29.58
1971	-5.52		2.75		10.13		26.93		35.61		52.73		52.23		49.65		48.13		44.42		24.57		9.55		29.27
1972	-9.10		-4.00		10.58		24.13		41.13		46.80		54.52		53.90		41.73		29.71		23.10		1.45		26.16
1973	0.84		4.33	a	25.90		29.73		37.87	a	51.93		55.16		54.13		44.50		39.03		23.97		4.39		30.98
1974	-2.87	a	-8.18		14.39		27.33		37.10		45.40		54.68		49.77		37.17		32.00		24.10		10.84		26.81
1975	1.74		2.18		6.23		21.37		43.45		51.57		56.55		49.77		39.27		32.84		23.27		4.32		27.71
1976	-7.10		7.97		10.03	a	30.83		35.77		50.13		51.16		46.81		35.97		24.97		10.86	a	-7.23		24.18
1977	-15.81		1.75		20.13		31.00		46.03		46.87		55.87		46.74		46.53		32.61		21.43		5.81		28.25
1978	-4.03		-7.36		6.52		27.43		41.42		48.90		53.42		52.90		47.03		34.45		17.60		0.23		26.54
1979	-11.74		-8.75		12.45		26.37		36.90		47.60		53.71		50.29		43.57		32.71		21.67		9.65		26.20
1980	-2.45		-3.86		7.97		29.97		40.81		48.13		53.65		53.23		36.81	n	29.55		21.07		2.61		25.51	a
1981	-3.90		6.43		16.16		28.83		35.61		49.54	b	51.39		51.74		38.73		27.97		21.83		5.48		27.48
1982	-14.90	a	-4.29	d	10.10		19.47		43.03	a	41.41	a	55.71		52.17	b	44.67		36.36	f	21.70		15.25	c	25.85	a
1983	5.07	a	15.81	a	18.40	a	26.17		33.68		47.73		57.52		54.87		46.23		34.39		25.20	o	-3.00	s	33.99	b
1984	-9.86	i	11.62		6.00	a	30.85	c	34.03	b	49.48	c	48.00	b	51.14	b	38.07	b	36.27	i	18.65	g	5.84	f	33.65	d
1985	-5.72	b	0.26	e	15.82	c	30.27	d	38.97	a	41.05	k	44.87		46.00	a	40.21	a	25.79	q	11.19	c	-8.90	a	21.30	b
1986	-2.77		-3.89		11.57	a	31.23		40.74		45.53		53.06		46.13		42.67		29.47	a	11.33		6.45		25.96
1987	3.52		4.71		15.17	a	25.17		36.68		48.60		51.87		47.43	a	43.37		29.48		24.30		15.20	a	28.79
1988	-5.61		-6.28		14.10		28.20		40.58		50.80		56.00		56.55		45.50		29.03	a	26.47		5.71		28.42
1989	4.87		-9.29		6.20	a	25.43		39.97	b	48.47		55.90		52.48		43.07		34.43	a	16.93		-7.16		25.94
1990	8.10		1.29		15.26		30.90		38.00		51.03		55.06		51.25	s	42.76	m	32.93	b	24.93		5.37	a	26.29	b
1991	-4.03		3.19	a	14.67	a	31.10		47.16		-----	z	56.77	a	56.06		43.61	b	32.13		17.10		3.06	m	29.77	b
1992	7.71		9.00		14.00		27.90		41.65		47.57	b	50.77		49.13		43.63		33.33	a	22.04	b	10.16		29.74
1993	-0.71		1.36		6.44	m	25.17		41.00		49.57		56.16		54.24	b	38.66	a	30.68	c	19.48	a	11.55		29.74	a
1994	-12.90		-3.85	a	16.32	l	25.83		39.55		53.14	a	55.00	a	52.32		49.30		38.39	m	23.30	j	13.27	a	30.18	c
1995	3.69	b	2.41	a	16.20	a	23.23		40.10	a	55.77		56.20	a	59.39		42.52	a	38.03	b	10.44	n	2.52		30.91	a
1996	-8.87	a	-2.89	a	4.13	a	21.50	b	37.94		53.54	b	53.29		54.45		47.30		34.30	a	17.27		10.03	b	26.83
1997	-0.13		5.50	b	8.56	m	24.76	a	35.34	b	54.18	b	56.16		51.13	a	47.71	b	36.47	a	20.60		15.97	a	31.61	a
1998	9.89	c	20.04		12.11	l	32.63		46.00		51.38	a	56.42		55.13	a	47.62	a	36.64	c	27.00	a	12.16		35.90	a
1999	-2.77		9.89		14.03	a	32.47		45.19		53.45	a	59.17	a	53.17	b	45.33		32.21	b	27.43		10.97		31.71
2000	-2.13	a	5.79	a	23.37	a	28.52	a	44.10		50.03		55.71		54.74		45.23		37.23	a	24.70		-3.72	b	30.30
2001	5.16		-2.11		11.80	a	31.03		44.23		53.20		56.93	a	56.50	a	45.73		34.35		31.44	c	17.68		32.16
2002	12.45		11.71		6.54	e	26.97	a	36.33	a	54.62	a	60.52	b	55.33	a	49.87		33.35	h	19.39	l	14.23		32.86	b
2003	1.00	a	-4.70	a	11.29		25.93		40.06		50.63		55.73	a	58.06		47.50		34.90	a	22.53		12.94		29.66
2004	-3.97		4.41		17.93	a	27.86	b	37.57	a	48.50		54.26		49.48		49.36	b	35.83	b	28.67	r	8.53	a	29.98	a
2005	0.42		8.50		7.46	e	33.53		41.55		56.82	b	58.23		56.61		48.86	a	39.52		24.10	a	10.13		32.14
2006	16.03		0.54		17.63	l	34.23		45.29		52.37		60.10	a	55.65		44.43		31.35		26.33		15.69	b	34.73	a
2007	7.32		-2.71		17.62	j	27.83		43.45		51.93		56.32	c	55.16		47.03		40.53	a	22.67		5.23		32.25	a
2008	3.90		-3.59	b	6.06		26.78	c	35.13		52.10		55.58		51.07	b	47.38	a	35.43	a	22.17	a	-1.59	b	27.54
2009	-8.03	a	5.64		13.79	b	29.17		40.06		49.97		51.16		51.70	a	46.55	a	32.45		29.00	a	6.74		29.02
2010	5.37	a	3.59	a	17.40	k	34.66	a	44.23		52.04	b	60.16		57.84		43.30		36.43	a	25.19	c	7.86	c	33.70	a
2011	0.47	a	4.50		9.29		27.24	a	40.77		50.63		60.58		54.40	a	45.27		37.68		26.26	c	14.03		30.93
2012	7.68		11.59		30.20	k	30.80		42.97		53.59	c	59.80	a	52.32		42.00		33.13		23.19	d	15.74		33.89	a
2013	3.43	a	1.39		8.00	b	23.77		40.00		50.59	c	57.37	d	53.81	e	45.00	b	34.46	e	21.56	c	-2.40	a	28.08
2014	-7.74		-7.50		1.71	c	24.10		42.24	b	53.88	m	54.07	a	53.08	f	44.33		35.52		15.41	a	13.26		21.54	b
2015	2.62	b	-8.64		13.68		28.60		41.29		50.07	a	55.00		53.52		51.59	a	35.77	a	28.46	b	23.62	g	32.00	a
2016	4.45	b	10.07		23.87	h	28.82	b	41.71		52.17	a	56.77	a	56.74		50.07	c	39.42	g	28.74	c	9.77		33.93	b
2017	6.72	b	12.71		17.47	p	31.29	f	40.10		52.40		54.74		51.17	g	48.83		38.16		21.13		5.06		31.10	c
2018	1.35		-1.46		12.92	e	17.07		46.35		54.60		55.87		56.10		48.83		31.26		17.03		14.48		29.53
2019	1.42		-3.57		7.06		28.67		38.87		49.77		58.39		51.87		50.40		36.03		19.63		12.06		29.22
2020	10.81		2.03		20.52		26.23		40.94		51.87		58.87		55.65		44.33		31.39		26.00		13.45		31.84
2021	8.16		-5.32		20.81		30.80		39.87		55.27		54.84		55.58		46.70		42.61		22.93		12.55		32.07
2022	-5.61		-2.25		14.16		26.40		44.52		50.33		55.35		54.58		46.80		34.81		23.17		8.94		29.27
2023	14.90		6.46		12.74		28.10		41.39		50.67		52.32		52.90		50.63		39.42		23.20		22.32		32.92
2024	14.32		15.17		19.00		31.89	k	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	16.16	i
Period of Record Statistics
MEAN	0.66		2.11		12.76		28.07		40.21		50.43		55.11		52.89		45.04		34.91		22.40		8.40		29.09
S.D.	6.75		6.17		5.55		3.23		3.45		2.79		2.68		3.02		3.15		3.55		4.12		6.03		1.81
SKEW	-0.03		0.34		0.26		-0.57		0.11		-0.35		-0.52		-0.18		-0.48		-0.05		-0.70		-0.58		-0.20
MAX	16.03		20.04		26.03		34.93		47.19		56.82		60.58		59.39		51.59		44.42		31.44		22.32		32.92
MIN	-15.81		-9.29		0.29		17.07		33.68		41.41		44.87		46.00		35.97		24.97		10.86		-8.90		24.18
YRS	88		90		79		89		88		86		89		87		87		82		84		85		60