ROCK RAPIDS, IA

Average of Minimum Temperature (Degrees Fahrenheit)

(137147)

File last updated on April 25, 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	-----	z	-----	z	-----	z	33.00	w	41.84		55.60		60.33	a	51.87		43.47		32.42		18.03		5.37	a	38.62	d
1894	-2.47	a	2.85	a	25.83	a	36.89	b	44.20	a	56.50		59.58		58.35		50.83		41.33	a	18.86	b	18.68		34.29
1895	-6.03	a	0.14		14.35		39.83		41.87	a	49.77		54.03		50.03		48.45	a	31.45		19.17	a	6.63	a	29.14
1896	10.17	a	11.41		13.90	a	34.50	j	44.87		53.65	d	55.26		54.30	a	38.63		26.10		6.86	a	18.45		30.33	a
1897	3.24	b	8.75		15.55		33.48	a	40.53	a	52.40		57.32		50.32		50.52	a	38.07	a	8.38	i	4.65		32.26	a
1898	10.97		-----	z	20.55	b	29.76	a	42.65		-----	z	56.03	a	-----	z	-----	z	32.58		-----	z	2.03	a	27.80	e
1899	1.87	a	-10.00	c	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-4.07	j
1900	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1901	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1902	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1903	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1904	1.71	c	0.18	a	22.03	b	31.03		44.61		54.86	a	57.74		54.29		47.00		39.52		24.67		9.40	a	32.25
1905	-0.07	b	0.74	a	30.67	a	31.77		42.42		56.20		58.84		62.52		57.00		34.69	b	29.03	a	17.00	b	35.07
1906	13.00	a	10.15	a	14.83	b	37.20		-----	z	54.60		58.19		59.97		52.20		32.71		25.07		12.39	c	33.66	a
1907	-0.89	c	11.32		26.97		27.67		38.06		52.13		58.87		56.77		46.57		31.03		23.93		14.67	a	32.26
1908	10.26		9.64	a	22.94		35.77		43.74		55.93		62.55		59.10		55.10		-----	z	-----	z	-----	z	39.45	c
1909	6.71		13.19	b	21.45		28.17		42.35		58.73		63.52		65.06		51.13		38.10		25.93		4.19	d	34.88
1910	6.68		1.68		30.03		38.90		-----	z	63.80	j	60.84		61.47	a	47.13		37.97		19.63		12.07	a	31.64	b
1911	3.32		13.14		26.39		35.13		49.13		60.10		57.37	a	56.68		50.80		36.29		16.83		13.55		34.89
1912	-7.43	a	10.27	c	14.71		35.45	a	47.68		50.73		58.97		54.84		44.70		31.63	a	22.30		13.03		31.41
1913	-----	z	2.46		15.39		33.47		43.42		-----	z	-----	z	61.71	c	48.80		30.87		29.48	a	16.07	a	31.30	c
1914	15.71		-0.41	a	-----	z	30.33	c	48.71		61.10		64.84		58.26		49.13		40.03		24.30		1.19		35.75	a
1915	3.87		-----	z	19.53	a	41.47		41.68		51.50		56.67	a	50.74		47.50		36.87		25.76	a	12.50	a	35.28	a
1916	-4.76	f	4.90		21.71		32.83		43.84		50.17		66.32		59.23		47.57		35.16		22.27		1.19		35.02	a
1917	0.23		0.14		20.00		34.17		40.27	a	51.03		59.45		55.03		48.77		27.55		27.90		0.13		30.39
1918	-4.63	a	6.21		27.19		31.37		48.03		55.83		58.39		59.77		41.48	a	39.23		28.63		22.00		34.46
1919	15.58		11.57		23.35		36.27		44.45		60.10		63.42		55.30	a	50.80		33.45		18.60		5.63	a	34.88
1920	6.52		13.14		20.73	a	29.59	a	44.52		56.83	a	59.29		52.55		52.50		42.19		25.37		14.94		34.85
1921	16.90		16.75		27.74		36.87		48.77		60.90		62.84		59.29		50.93		39.26		19.63		13.52		37.78
1922	3.90		3.32		25.43	a	36.33		50.32		57.57		57.90		59.29		51.97		39.81		31.60		7.19		35.39
1923	13.10		3.48	a	14.80	a	32.63		45.81		59.03		63.45		56.39		51.90		35.42		26.60		18.00		35.05
1924	-1.68		13.17		22.16		33.77		38.48		54.63		56.35		57.74		45.87		43.10		23.33		0.74		32.31
1925	2.45		14.14		25.77		41.67		41.55		56.43		58.45		58.80	a	54.77		27.81		22.86	a	10.84		34.63
1926	7.61		19.61		19.65		29.73		50.55		52.00		61.03		59.84		49.67		37.13		20.43		7.42		34.56
1927	10.87		16.75		27.03		35.43		45.26		53.00		55.45		52.39		53.23		37.39		23.17		-0.90		34.09
1928	10.74		14.55		24.35		27.27		46.00		50.23		59.68		58.48		44.93		38.10		26.20		17.68		34.85
1929	-3.71		-2.82		25.81		35.07		42.55		52.57		61.16		57.52		47.57		37.68		20.07		11.35		32.07
1930	-4.32		21.36		21.48		36.07		45.87		53.73		61.26		60.16		47.07		37.39		25.07		16.42		35.13
1931	14.45		20.25		22.00		34.27		42.74		61.87		60.52		59.16		56.73		43.03		26.90		21.71		38.64
1932	6.00		10.93		15.81		36.60		47.81		58.97		61.77		59.68		45.87		34.87		19.93		5.00		33.60
1933	15.90		2.44	a	23.13		33.40		46.35		60.97		62.19		55.87		53.67		33.45		22.69	a	11.74		35.15
1934	12.97		13.14		19.06		34.87		53.71		59.17		63.10		57.06		43.93		40.58		28.40		8.55		36.21
1935	6.48		21.18		27.71		35.03		43.71		53.93		67.03		60.45		50.10		34.16		20.37		12.61		36.06
1936	-5.90		-12.14		23.45		29.83		52.13		55.77		66.00		62.71		53.38	a	33.50	a	22.40		14.90		33.00
1937	-6.26		5.39		22.16		35.77		49.52		55.31	a	62.00		65.26		50.67		35.68		20.31	a	8.10		33.66
1938	5.03		11.25		27.71		37.27		47.19		56.63		63.13		62.06		52.87		43.19		22.00		15.19		36.96
1939	16.52		0.64		21.48		33.20		51.87		58.60		63.06		57.23	a	50.97		36.90		22.37		18.03		35.91
1940	-4.26		11.41		20.97		33.66	a	44.35		57.33		63.35		59.55		53.70		43.19		19.13		16.90		34.94
1941	12.26		10.68		23.03	a	41.97		53.19		58.40		62.19		61.74		52.97		39.63	a	25.70		17.68		38.29
1942	11.16		13.89		27.35		38.17		45.87		57.93		60.74		60.35		47.40		36.32		23.66	a	8.90		35.98
1943	0.81		14.25		15.90		34.40		43.26		59.33		62.87		62.19		46.03		34.97	a	23.70		12.97		34.22
1944	16.81		11.86		19.16		33.10		52.52		58.87		59.87		60.35		50.60		37.23		29.97		14.16		37.04
1945	12.13		13.96		27.87		33.87		41.74		52.67		60.10		60.55		50.00		36.26		23.40		6.39		34.91
1946	5.52		13.04		33.06		39.23		43.61		57.17	a	62.26		56.55		49.53		38.87		23.00		14.74		36.38
1947	14.23		6.89		22.45		34.60		42.39		54.60		60.57	a	65.90		52.67		46.35		23.13		13.40	a	36.43
1948	5.55		8.59		19.58		39.77		46.74		56.30		61.68		61.23		53.47		36.10		26.13		11.19		35.53
1949	4.55		5.29		24.29		34.43		51.26		59.57		63.13		60.94		45.13		40.00		28.00		11.58		35.68
1950	-3.77		10.14		17.90		29.57		44.10		56.73		57.42		55.23		49.50		40.55		19.00		8.10		32.04
1951	2.90		13.50		12.81		33.23		49.68		53.53		60.42		58.97		46.00		37.71		18.20		6.26		32.77
1952	2.13		19.24		20.94		36.53		46.55		60.13		61.84		58.65		50.20		29.94		22.47		13.58		35.18
1953	7.90		15.11		24.16		32.10		47.10		60.23		61.97		61.42		48.10		40.84		26.30		12.71		36.49
1954	1.77		25.50		21.32		36.23		41.32		59.87		64.03		60.81		52.53		39.35		28.43		16.81		37.33
1955	10.29		5.32		19.29		40.60		49.94		56.10		67.57	a	64.35		50.67		37.87	a	15.20		3.23		35.03
1956	2.81		3.52		18.71		29.20		49.19		61.77		59.35		59.87		46.30		43.00		24.17		15.48		34.45
1957	0.00		14.25		22.42		34.30		46.90		55.73		67.32		60.77		48.13		39.39		26.50		19.48		36.27
1958	14.10		4.86		24.52		35.13		48.00		53.10		59.71		60.42		51.50		39.47	a	23.33		6.39		35.04
1959	1.65		2.43		25.19		33.43		49.55		60.67		59.97		64.97		50.67		35.00		15.60		23.87		35.25
1960	7.45		8.68	a	9.13		36.70		46.10		56.03		60.77		61.74		51.70		37.68		25.40		11.26		34.39
1961	2.39		12.68		27.68		31.93		44.55		56.73		59.93	a	60.90		49.77		37.84		23.97		6.71		34.59
1962	1.65		10.57		17.19		33.33		53.55		57.67		61.06		59.68		47.77		41.48		29.37		12.81		35.51
1963	-3.10	a	9.11		28.39		38.40		47.87		61.72	a	64.29		60.90		54.07		46.42		27.93		2.94		36.58
1964	12.19		14.76		16.97		37.20		50.94		57.57		65.16		56.74		50.37		36.58		24.93		7.16		35.88
1965	3.58		3.04		14.19		34.97		50.10		58.90		61.60	a	58.10		45.93		39.90		23.47		21.18	n	35.80	a
1966	-1.84		7.79		25.90		32.00		41.97		56.93		65.26		56.42		49.67		36.45		21.20		10.83	a	33.55
1967	8.13		4.32		25.70	a	35.50		40.63	a	56.37		59.00		56.00		48.21	a	35.63	a	21.50		14.32		33.78
1968	6.35		9.55		26.13		35.97		41.06		58.20		60.42		61.06		50.63		39.06		25.97		11.07	a	35.46
1969	0.45	b	12.79		11.06		36.40		48.58		51.30		-----	z	60.32	f	48.43		34.10		23.50		11.52		27.81	b
1970	-7.00		4.82		17.03		34.30		47.19		58.03		61.26		59.13		49.27		36.03		23.67		4.90		32.39
1971	-0.52		9.14		20.10		34.20		42.39		61.43		57.39		56.03		46.77		40.74		22.67		9.13		33.29
1972	-3.55		-0.14		20.39		33.30		49.77		56.27		59.06		58.77		46.70		32.45		26.20		5.74		32.08
1973	8.77		13.25		31.71		34.93		42.81		56.83		62.39		61.68		49.03		40.42		-----	z	8.10		37.27	a
1974	-0.55		13.00		22.39		35.70		44.74		55.20		63.77		-----	z	41.40		33.10		24.50		12.90		31.47	a
1975	5.23		5.04		13.16		32.73		47.16		54.90		60.54	c	60.87		44.63		36.06		23.47		12.13		32.99
1976	3.90		19.34		21.52		38.53		42.97		55.43		62.16		58.87		47.10		29.83	a	16.37		-----	z	36.00	a
1977	-6.71		12.64		27.26		41.87		54.47	a	58.83		64.45		56.33	a	50.31	a	35.10	b	23.32	b	8.64	c	35.54
1978	-7.94		-----	z	18.06		36.59	a	46.72	b	56.93	b	60.87	a	59.24	b	54.33	c	35.10		18.53		3.72	b	34.74	a
1979	-9.77		-6.79		18.66	b	33.41	a	41.93	b	56.20		60.68		57.19		47.97		32.53	a	20.67		15.93	a	30.72
1980	7.39		7.45		18.97	a	35.17		45.39		56.00		59.23		57.35		47.97		31.70	a	23.90		10.23		33.39
1981	7.35		11.78	a	19.43	c	39.23		43.77		55.24	a	61.97		58.48		45.73		34.55		26.45	a	7.52		34.29
1982	-9.13	a	-----	z	22.61		30.37		50.21	b	50.54	b	62.90		58.00	a	48.85	c	35.87	a	21.74	c	14.83	a	35.16	a
1983	9.20	a	16.68		24.40	a	31.17		41.94		56.50		65.19		62.84		47.60		35.68		27.77		-9.26		34.14
1984	4.68		17.10		15.40	a	36.38	a	44.32		57.97	a	59.80	a	59.19		41.03		36.94		21.00		6.74		33.38
1985	-2.57	a	5.57		26.24	b	38.28	a	49.13	a	51.79	a	56.97	b	53.39		48.31	a	33.58		12.62	a	-4.68		30.72
1986	8.52		6.93	a	24.46	e	35.75	b	47.71		58.73		61.65		51.84		47.24	a	36.19		17.25	b	12.55		34.07
1987	9.41	b	18.81	a	25.77		33.96	b	50.59	d	58.97		64.07	a	57.13		48.47		29.07	a	28.63		16.94		36.82
1988	-4.48		1.59		23.84		31.00		51.32		61.93		61.45		60.29		48.21	b	30.23	a	22.77		11.00		33.26
1989	13.52		-2.39		18.81		32.27		43.61		54.07		63.97		59.26		46.53		32.45		17.77		-0.55		31.61
1990	14.81		9.46		24.71		30.27		43.48		57.50		60.06		58.52		51.03		32.19		22.03		5.19		34.11
1991	-0.13		15.46		22.87		36.40		51.61		62.83		60.68		58.65		47.93		31.65		14.93		13.84		34.73
1992	15.97		21.34		24.42		30.93		44.87		54.23		55.45		53.37	a	45.83		34.39		24.13		10.73	a	34.64
1993	1.11	c	4.96		16.16		31.77		45.35		53.87		61.33	a	59.77		43.57		33.39		18.20		12.61		31.84
1994	-3.77	a	-0.29		24.84		31.83	a	48.63	a	60.13		57.55		55.68		50.93		39.03		25.14	a	12.74		33.54
1995	7.37	a	12.50		23.61		30.57	b	42.19		58.13		60.90		63.20	a	45.77		36.45	b	17.90		14.55		34.43
1996	0.17	a	11.07	a	13.43	a	28.77		45.35		58.77		58.00		57.67	a	47.70		34.77		16.66	a	4.67	a	31.42
1997	-0.55		9.43		20.55	b	29.25	b	39.70	a	58.37		62.65		58.13		49.38	a	36.73	a	19.87		17.87	a	33.45
1998	12.72	b	23.89	a	20.84		35.23		51.16		54.53		62.10	a	61.61		51.77		39.35		27.47		13.71		37.87
1999	3.74		19.36		22.67	a	36.31	a	47.45		57.33		64.06		57.45		45.50		32.29		26.13		12.47	a	35.40
2000	4.26		17.14		26.06		32.73		47.38	b	54.79	a	61.42		59.40	a	45.67		38.73	a	17.37		-2.48		33.54
2001	8.03	a	2.42	b	15.90	a	34.41	a	48.58		56.79	a	65.07	a	60.35		48.83		34.71		30.40		16.87		35.20
2002	9.81		14.43		13.19		33.76	a	41.20	a	60.17	a	64.06		58.73	a	50.38	a	31.61		20.93		13.50	a	34.32
2003	5.23	a	4.04	a	18.17	a	35.07		44.90		55.93		61.19	d	59.55		44.73		35.90		20.97		15.74		33.45
2004	2.40	a	8.41		28.13		33.07		45.29		54.10	a	59.48		52.97	a	53.17		38.27	a	25.80		13.90		34.58
2005	5.00	a	17.04		19.84		38.30		46.10		61.30		63.65		59.26		53.59	a	37.23	a	26.10		10.00		36.45
2006	22.93	a	11.85	b	23.10	a	39.83		48.65		56.47		63.61		60.13	a	46.31	a	33.77		22.20		17.90	a	37.23
2007	7.57	a	2.82		27.42		32.97		51.97	a	59.13		61.71		61.90		49.63		42.06		22.77		6.45		35.53
2008	0.94		2.86		18.71		31.36	b	43.81		56.87		61.61		57.97		48.83		36.48		24.97		3.39		32.32
2009	0.65		11.48	a	20.90		31.97		46.26		56.80		56.87		55.55		50.14	b	33.58		29.29	b	6.81		33.36
2010	1.29		4.04		26.97		40.43		46.35		58.38	a	62.77		63.84		47.62	a	37.32		22.59	a	6.03	a	34.80
2011	0.81		7.59	a	20.10		34.60		46.39		56.70	c	66.63	a	58.42		45.33		37.65		22.30		14.48		34.25
2012	11.33	a	14.68	a	34.81		37.50		50.48		59.67		66.90		57.58		44.83		32.42		23.50		12.26		37.16
2013	6.52		12.00		17.52		27.27		45.32		57.03		60.61		59.45		52.97		37.13		19.00		1.97		33.07
2014	-0.84		-1.11		15.87		31.77		45.55		57.30		57.84		59.97		49.20		37.19		17.88	e	18.00		32.39
2015	10.74		3.46		21.53	a	35.73		46.39		57.97		60.35		57.52		55.37		39.77		27.77		19.80	a	36.37
2016	8.03		18.69		28.61		36.43		47.10		60.77		59.97	a	60.29		54.03		39.58		29.93		10.27	a	37.81
2017	13.23		20.25		24.58		36.87		45.61		57.97		62.29		56.10		52.91	g	37.35		22.13		11.55		35.27	a
2018	4.16		2.39		25.00		25.83		52.45		63.43		61.94		58.84		54.80		34.03		19.07		17.26		34.93
2019	6.32		-0.46		17.74		33.47		43.65		58.63		64.06		58.33	a	55.90		34.87		21.79	a	13.94		34.02
2020	11.06		11.83		26.39		30.03		46.68		62.66	a	63.00		59.77		48.73		30.90		25.86	b	14.45		35.95
2021	16.26		2.46		27.00		33.33		46.81		59.70		61.94		60.16		51.33		42.32		26.93		16.71		37.08
2022	2.16		4.64		21.45		28.33		47.10		58.63		62.90		59.03		49.50		34.58		22.93		7.81		33.26
2023	9.29		6.43		16.59	b	33.10		49.65		60.67		57.97		60.32		53.80		39.55		24.00	a	22.55		36.16
2024	8.77		22.45		22.39		35.08	f	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	17.87	i
Period of Record Statistics
MEAN	4.95		9.23		21.84		34.28		46.16		56.91		61.20		58.69		49.19		36.40		23.01		10.90		34.54
S.D.	6.72		7.05		4.82		3.34		3.54		3.03		2.75		3.06		3.40		3.79		4.06		5.93		1.81
SKEW	0.01		-0.22		-0.09		0.02		0.17		-0.28		-0.06		-0.49		-0.17		-0.02		-0.60		-0.54		-0.27
MAX	22.93		25.50		34.81		41.97		54.47		63.43		67.57		65.90		57.00		46.42		31.60		23.87		38.64
MIN	-9.77		-12.14		9.13		25.83		38.06		49.77		54.03		50.03		38.63		26.10		6.86		-9.26		29.14
YRS	125		123		125		124		124		123		124		123		124		125		122		123		107