WATERTOWN REGIONAL AP, SD

Average of Maximum Temperature (Degrees Fahrenheit)

(398932)

File last updated on April 18, 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
1893	17.90		19.21		31.61		50.93		69.50	a	85.73		87.67	a	86.93	p	87.59	m	57.87	h	43.63		23.00		47.69	c
1894	17.40	a	24.57		45.97		59.10	a	70.97		84.43	b	-----	z	-----	z	-----	z	-----	z	35.40	o	37.72	b	48.59	e
1895	16.29	g	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1896	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1897	-----	z	-----	z	33.00	e	55.27		70.35		74.14	a	82.45		76.26		80.63		59.65		37.30		24.14	b	59.32	b
1898	29.77		31.21		40.65		57.87		66.61		79.57		82.03		81.03		75.13		51.00	a	37.17		25.00	a	54.75
1899	24.58		14.30	a	25.00		56.33		64.94		75.43		83.94		81.29		68.97		59.48		49.27		26.61		52.51
1900	30.45		19.46		38.39		62.77		73.90		82.93		81.26		86.58		69.31	a	66.42		36.50		33.59	d	56.80
1901	29.77	e	25.24	c	39.89	d	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	31.63	i
1902	25.73	e	26.12	b	-----	z	55.97		69.57	a	73.41	a	81.73	a	78.45	i	72.57	p	61.45	b	38.36	b	18.97	a	50.14	c
1903	22.68		19.61		37.90		56.86	a	68.23		74.67		78.14	c	75.72	b	67.10		60.90	b	39.79	b	23.67	a	52.10
1904	14.84		14.69		35.62	b	51.11	b	66.58		73.20		77.20	a	77.80	a	70.41	c	60.26		48.90		27.40	a	51.50
1905	15.82	c	22.18		46.13		55.07		63.03	a	73.43	b	78.53	a	82.16		74.76	a	53.90	a	45.21	b	29.74		53.33
1906	27.04	f	27.92	b	28.48		58.48	c	65.52		72.21	a	77.00		77.81		72.07		54.45		35.70		26.97		54.24	a
1907	11.87	a	24.68		40.03	b	44.85	c	55.83	b	73.24	i	76.50	c	79.38	b	66.03		57.14	i	45.27		34.57	a	47.90	b
1908	32.34	b	26.29	a	36.90	b	59.63	c	66.33	a	71.26	c	78.84	f	78.90	b	78.34	a	56.45		44.90		28.00		52.67	a
1909	20.77		26.36		35.97	b	48.90	a	67.55		76.70		80.77		86.44	f	73.57		56.61	c	43.00		16.39		49.69	a
1910	21.19		20.00		58.13		62.41	a	65.87		80.03		86.23		80.32		72.14	a	66.35		-----	z	28.73	a	58.31	a
1911	19.23		28.00		50.08	e	54.62	a	75.29		85.21	a	83.61		77.52		71.77		51.77		29.03		27.45		54.46
1912	7.80	a	23.75	a	32.61		59.53		68.10		73.93		80.55		77.90		69.79	b	62.16		49.86	a	32.19		53.18
1913	24.77		23.25		32.10	a	57.57		63.48		80.90		79.65		85.45		72.50		54.74		49.10		37.90		55.12
1914	26.58		16.82		37.71		53.93		67.16		76.03		85.55		81.23		73.86	a	65.67	a	48.93	a	20.26		54.48
1915	20.81		28.71		32.55		65.37		61.32		70.53		74.61		76.71		69.77		61.71		46.13		29.27	a	53.12
1916	12.37	a	18.76		36.19		51.37		64.97		70.30		86.61		78.68		68.93		56.52		44.13		20.97		50.82
1917	18.19		15.14		34.10		48.80		65.19		71.80		85.87	a	79.70	a	69.17		47.57	a	51.53		17.10	a	50.35
1918	12.13		25.82		47.87		52.47		70.00		76.30		79.90		82.39		69.13		63.10		38.90		31.81		54.15
1919	32.55		23.79		38.87		54.43		68.48		77.20		85.13		84.10		75.77		51.71		32.67		21.84		53.88
1920	20.16		28.21		41.06		45.57		68.23		75.97		81.65		81.71		74.40		66.29		37.60		28.84		54.14
1921	31.81		39.18		46.84		60.33		69.26		85.13		85.74		81.90		71.20		62.71		33.83		30.83	a	58.23
1922	22.39		18.81	a	37.45		56.90		70.23		80.23		81.48		87.55		79.03		64.65		41.40		26.00		55.51
1923	27.10		22.21		35.48		55.50		69.81		78.07	a	84.84		80.13		75.17		57.32		49.17		39.13		56.16
1924	20.29		34.14		37.06		57.40		62.03		72.60		79.90		78.30	a	67.50		69.39		43.30		18.71		53.39
1925	21.87		31.61		49.58		66.38	a	68.48		74.53		80.23		85.68		76.17		44.23		41.53		24.74		55.42
1926	24.58		33.11		37.81		58.80		74.84		73.87		83.61		80.65		66.60		57.00		31.83		23.19		53.82
1927	22.71		29.54		41.13		53.93		61.19		73.93		77.29		77.00		73.37		64.45		34.97		11.94		51.79
1928	23.84		29.90		44.87		50.53		74.70	a	73.60		83.35		82.35		68.83		56.74		42.30		33.52		55.38
1929	9.90		15.57		41.65		55.60		64.19		77.37		85.55		84.71		66.60		59.42		35.66	a	24.71		51.74
1930	13.13		38.39		40.23		60.33		66.81		77.30		91.61		87.74		74.10		54.87	a	44.10		32.19		56.73
1931	37.48		42.93		42.42		61.43		67.10		86.20		89.83	a	83.30	a	81.33		62.71		46.73		32.97		61.20
1932	21.32		29.59		31.03		55.80		72.65		82.77		88.42		85.61		76.17		54.48		39.80		24.81		55.20
1933	32.77		25.39		42.65		56.50		68.39		93.23		92.32		85.19		80.37		61.42		42.00		26.32		58.88
1934	29.52		31.57		41.06		58.31	a	85.06		85.62	a	90.87		84.97		68.60		65.00		45.80		23.29		59.14
1935	18.29		36.39		44.39		49.53		62.71		74.40		91.10		85.06		78.23		59.74		33.57		24.03	a	54.79
1936	7.29		3.10		39.39		52.90		75.03		80.40		96.45		87.77		79.03		57.42		34.07	a	25.13	a	53.17
1937	7.58		20.25		34.03		49.13		70.48		76.43		87.19		88.68		74.33		56.06		38.33		24.58		52.26
1938	19.00	a	24.29		44.23		59.17		64.26		78.47		85.29		88.71		76.53		68.00		38.47		30.06		56.37
1939	27.39		18.21		42.26		57.23		77.58		78.47		86.39		84.19		78.27		58.61		49.93		38.84		58.11
1940	14.74		26.03		32.06		49.92	e	69.57	c	77.13		87.94		77.16		76.57		66.10		31.60		31.21	c	53.34
1941	21.94		21.18		34.77		56.23		72.26		75.93		84.07	c	84.55		72.67		58.71		42.10		34.32		54.89
1942	28.84		27.46		41.68		60.80		60.68		72.20		79.94		79.03		64.10		57.61		41.96	f	22.94		54.12	a
1943	12.10		27.82		30.97		57.23		62.97		75.03		85.61		81.52		67.80		60.61		35.50		32.87		52.50
1944	34.65		26.69		30.35		49.27		71.16		76.53		82.00		79.65		70.13		62.23		38.83		26.68		54.01
1945	21.53	a	27.29		47.13		51.73		62.06		67.90		80.68		80.74		68.10		60.52		35.37		16.97		51.67
1946	23.43	a	24.36		47.06		62.13		63.13		76.70		81.84		78.65		68.70		54.77		37.53		26.65		53.75
1947	28.81		22.30	a	34.03		47.40		62.97		71.67		82.42		87.74		72.17		65.26		31.33		23.23	a	52.44
1948	19.86	b	20.59		31.90		57.47		67.39		72.70		83.55		81.52		75.83		59.42		39.43		28.16		53.15
1949	16.03		22.00		37.23		60.17		72.00		79.33		84.90		85.13		67.50		57.68		46.93		27.42		54.69
1950	11.16		26.79		31.68		41.43		62.58		79.13		78.55		76.87		71.50		60.84		35.00		22.45		49.83
1951	16.45		28.50		25.84		49.47		68.68		70.53		79.10		76.42		64.80		54.52		35.23		18.65		49.01
1952	18.84		27.41		28.58		58.10		67.48		80.30		83.61		80.71		77.23		56.84		42.47		28.84		54.20
1953	22.90		25.68		38.84		46.87		65.39		77.40		81.42		82.06		72.97		67.06		45.00		27.35		54.41
1954	15.26		39.96		33.71		54.57		61.74		75.13		84.32		81.19		68.77		53.48		47.00		30.68		53.82
1955	24.84		20.04		36.23		65.57		74.39		74.80		86.39		85.65		72.67		62.23		30.37		17.90		54.25
1956	18.58		21.76		33.45		48.67		67.26		82.47		79.26		80.39		70.90		67.48		38.40		31.77		53.37
1957	15.23		28.74	a	38.13		54.03		62.90		74.43		87.77		80.29		68.53		54.39		38.73		33.90		53.09
1958	29.81		25.43		36.35		55.07		72.77		71.97		79.23		85.55		74.80		63.58		41.97		22.16		54.89
1959	16.23		21.54		42.87		56.43		67.35		81.90		86.29		86.35		71.50		51.74		30.30		33.81		53.86
1960	20.19		21.41		25.16		52.43		68.61		74.03		85.81		83.48		72.50		61.26		43.57		24.45		52.74
1961	22.23		29.64		42.90		50.17	a	63.23		80.13		82.10		86.87		67.57		61.13		39.87		22.97		54.07
1962	17.60	a	20.50		31.39		54.17		66.90		74.47		77.61		82.55		68.23		61.87		44.40		29.16		52.40
1963	13.74		28.11	a	45.48		56.87		66.26		79.57		81.55		80.84		73.34	a	68.71		45.83		20.13		55.04
1964	29.77		33.83		33.29		55.30		72.03		79.93		87.81		78.48		68.10		60.39		39.97		18.94		54.82
1965	16.42		23.79		25.97		50.77		68.16		75.17		82.35		80.58		57.33		62.23		41.43		32.77		51.41
1966	12.23		23.25		44.61		47.60		65.74		77.70		88.23		77.42		69.13		58.61		36.17		27.45		52.35
1967	25.58		21.46		41.77		52.47		63.48		74.40		81.45		81.60	a	72.10		57.13		39.50		28.03		53.25
1968	22.29		24.24		50.16		56.37		63.27	a	76.87		80.90		80.03		69.70		57.74		38.93		19.61		53.34
1969	14.06		24.14		28.61		55.83		68.74		69.23		80.50	a	84.68		74.17		50.10		41.67		27.26		51.58
1970	13.13		27.43		33.35		51.17		68.26		79.60		85.45		83.83	a	72.70		55.10		35.93		23.83	a	52.48
1971	13.26		24.75		38.87		58.33		66.77		79.93		79.97		84.32		70.53		57.61		38.83		22.84		53.00
1972	15.55		19.66		35.16		49.43		67.77		76.93		78.84		79.65		70.33		53.52		35.13		18.87		50.07
1973	24.55		29.82		44.45		53.57		68.10		79.63		83.90		86.84		67.70		64.00		38.47		20.77		55.15
1974	19.00		27.18		37.29		56.23		62.81		78.83		89.77		79.55		70.20		62.13		40.63		30.45		54.51
1975	23.84		21.54		30.71		43.53		70.77		76.23		89.58		81.81		67.37		61.45		42.30		26.10		52.94
1976	21.03		34.97		40.45		60.67		68.81		83.00		89.52		87.55		76.03		53.94		35.63		22.58		56.18
1977	11.23		31.96		41.61		63.40		76.84		79.10		84.23		75.58		68.77		56.68		36.13		18.03		53.63
1978	8.35		15.21		35.55		49.90		67.90		77.70		81.32		83.68		77.23		58.58		37.37		21.48		51.19
1979	7.00		14.14		32.10		47.73		62.65		76.00		80.90		77.29		75.70		56.19		38.33		35.52		50.30
1980	23.10	a	22.28		35.13		61.67		72.06		77.53		83.94		79.29		72.73		54.68		45.47		27.00		54.57
1981	29.97		32.68		48.87		62.23		66.97		76.73		82.45		80.42		73.90		55.39		45.93		21.94		56.46
1982	9.48		24.29		34.90		53.77		67.13		72.60		84.23		81.55		68.70		55.77		35.97		32.19		51.71
1983	28.29		33.21		37.13		49.60		65.29		75.77		87.74		89.81		71.17		55.29		34.57	b	7.71		52.96
1984	22.58		34.07	a	31.19		54.27		65.81		75.90		84.10		83.52		67.77		56.55		43.20		23.65		53.55
1985	21.45		26.71		45.19		63.80		74.19		75.43		-----	z	-----	z	65.50		57.52		26.60		17.71		47.41	b
1986	27.26		21.19	b	42.77	a	56.03		68.48		80.53		84.68		77.35		66.73		59.23		36.47		35.65		54.70
1987	31.61		41.11		43.71		67.80		76.74		85.30		87.29		80.19		72.70		55.39		45.93		29.90		59.81
1988	19.35		23.72		44.10		62.23		76.58		89.07		89.71		85.48		74.07		56.65		39.33		31.06		57.61
1989	31.71		16.86		34.87		56.20		69.87		78.33		88.26		81.74		71.90		62.42		37.67		18.23		54.00
1990	36.74		33.00		45.26		58.00		66.61		78.83		81.52		81.68		77.73		59.16		45.00		24.58		57.34
1991	21.13		36.18		44.13		59.97		69.13		80.13		81.90		81.16		71.00		57.42		33.00		32.81		55.66
1992	31.00		34.62		45.77		52.93		73.16		74.23		72.03		74.90		69.90		57.61		31.63		22.65		53.37
1993	19.77		19.32		34.94		52.07		66.39		72.33		77.81		78.90		66.37		57.48		35.07		26.19		50.55
1994	8.39		15.93		40.19		57.03		73.68		78.07		79.68		77.32		72.50		58.71		42.70		28.77		52.75
1995	22.61		27.39		39.23		46.70		64.35		78.07		82.06		83.03		69.87		53.65		33.73		25.84		52.21
1996	15.68		27.41		32.65		51.43	g	-----	z	-----	z	78.74		80.61		68.70		56.87		27.10	a	14.23	a	44.67	c
1997	13.55		24.61		32.06		48.30		63.00		79.90	a	79.42		77.74		73.17		59.39		32.60		30.97		51.22
1998	21.55		34.21		31.10		57.47		70.63	a	72.07	a	81.87		81.00		77.50		58.23		40.20		32.13		54.83
1999	19.90	a	35.71		42.90		55.43		67.81		75.37		84.00		81.06		68.40		58.10		52.37		35.03		56.34
2000	24.39		37.59		50.61		54.70		69.97		75.37		81.29		81.81		73.33		60.00		31.70		13.90	a	54.55
2001	24.35		15.93		31.00		54.13		67.87		76.87		85.10		83.23		71.27		56.84		51.80		29.65		54.00
2002	28.45		37.54		27.94		53.93		63.42		80.80		87.06		79.19		72.73		45.61		40.40		31.50	a	54.05
2003	22.81		23.00		39.19		57.33		65.58		75.23		82.87		83.65		70.07		62.13		34.90		29.55		53.86
2004	19.61		26.76		45.39		60.07		64.71		72.53		79.35		75.35		74.47		58.03		46.03		31.23		54.46
2005	20.77		33.68		41.94		60.10		64.87		78.23		85.32		81.00		75.90		58.90		42.70		22.84		55.52
2006	31.94		25.36		38.68		60.87		68.58		78.67		89.29		81.94		65.30		54.13		43.70		35.94		56.20
2007	24.19		16.93		42.61		52.40		71.19		79.00		85.97		78.71		73.13		60.97		41.07		20.94		53.93
2008	19.61		22.83		35.42		51.50		63.81		73.73		82.68		80.03		71.47		55.16		39.03		19.39		51.22
2009	16.81		25.21		36.81		52.70		68.71		72.73		76.48		76.23		72.63		45.55		49.13		17.58		50.88
2010	16.58		20.75		41.74		62.43		65.35		75.47		81.97		83.48		67.50		60.45		39.97		19.03		52.89
2011	14.81		19.82		28.87		50.47		63.81		74.77		85.10		80.87		70.97		62.23		43.30		33.97		52.41
2012	30.16		33.24		56.06		58.33		70.23		80.93		88.68		81.61		75.43		54.19		41.80		25.23		57.99
2013	22.29		24.18		29.06		43.31	a	64.42		74.40		80.68		82.16		77.63		52.94		39.63		17.29		50.67
2014	20.84		17.36		35.00		52.03		66.90		74.90		77.94		77.19		70.43		59.35		30.17		28.48		50.88
2015	25.35		21.07		46.52		61.07		65.13		78.23		82.68		78.65		77.03		62.77		47.83		31.26		56.47
2016	24.03		31.93		49.71		57.70		70.81		82.97		83.97		81.87		71.67		59.65		49.30		22.19		57.15
2017	21.52		36.11		39.32		55.37		67.45		78.60		83.77		75.10		72.50		57.65		41.17		26.61		54.60
2018	24.00		20.11		34.35		44.03		74.81		79.90		80.87		78.55		70.23		51.45		32.17		29.84		51.69
2019	18.29		11.68		31.13		51.97		61.94		77.83		81.29		75.42		72.53		48.45		36.37		26.13		49.42
2020	22.97		25.86		41.48		53.83		63.81		81.17		83.52		82.19		70.70		49.94		47.47		33.74		54.72
2021	29.19		16.54		47.97		54.80		67.19		85.93		84.23		82.10		75.43		60.97		44.20		29.35		56.49
2022	21.94		25.96		38.94		46.13		66.53	a	81.27		82.68		80.84		76.63		60.58		37.37		20.74		53.30
2023	21.81		26.25		28.45		49.07	a	74.87		83.60		81.87		83.39		77.47		56.23		45.93		38.71		55.64
2024	21.32		39.07		42.90		57.88	m	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	34.43	i
Period of Record Statistics
MEAN	21.20		25.63		38.37		54.94		67.82		77.37		83.32		81.39		71.90		58.36		40.12		26.33		53.93
S.D.	6.70		6.81		6.54		5.22		4.30		4.24		3.96		3.38		3.95		4.80		5.68		6.09		2.24
SKEW	0.01		0.09		0.27		-0.12		0.66		0.68		0.27		0.25		-0.11		-0.28		-0.01		-0.19		0.46
MAX	37.48		42.93		58.13		67.80		85.06		93.23		96.45		89.81		81.33		69.39		52.37		39.13		61.20
MIN	7.00		3.10		25.00		41.43		55.83		67.90		72.03		74.90		57.33		44.23		26.60		7.71		49.01
YRS	128		129		129		127		127		126		125		123		125		125		125		128		116