WATERVILLE TREATMENT PLT, ME

Average of Minimum Temperature (Degrees Fahrenheit)

(179151)

File last updated on April 24, 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
1895	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1896	-----	z	-----	z	17.31	b	30.77		41.10	b	49.62	a	58.03		55.43	c	47.57		36.55		28.31	a	11.06		37.58	b
1897	8.32		9.44	a	19.53	a	32.83		44.03	a	48.56	c	58.60	a	54.42		45.57		33.30	a	25.40		14.32		32.86
1898	3.26		14.23	b	23.03	a	30.07	a	42.71		52.27		57.50	a	57.97		49.27		39.84		29.34	a	13.03	a	34.38
1899	3.69	e	7.37	a	18.45		29.11	b	40.10		50.72	a	57.03	a	54.06		46.13		39.15	e	23.36	h	20.41	b	33.29	a
1900	6.32		7.92	b	15.76	b	31.38	a	36.77		50.86	a	57.58		55.61		46.70		41.58		27.41	a	-----	z	34.36	a
1901	6.83	b	6.13	e	17.50	e	36.25	b	43.53	a	51.72	a	58.23	a	55.81		48.61	b	34.97	b	18.43		8.83	b	32.24
1902	4.64	c	9.11	a	26.55		32.17	a	39.84		47.20		52.81		51.39		47.97	a	35.90	b	28.40		4.68	c	31.72
1903	5.87	a	9.89		28.55		30.83		38.93	b	48.52	a	55.68		47.69	b	45.20		-----	z	22.93		9.10	a	31.20	a
1904	-0.39		0.72		17.90		29.52	a	45.00		-----	z	56.63	d	52.68		42.90		34.57	a	20.97		2.87		27.58	a
1905	-0.28	b	3.61		15.13	a	30.37		40.32		48.27		56.29		51.03		46.47		32.81		24.67		14.00		30.22
1906	13.84		8.82		14.34	b	27.80		39.48		47.77		56.19		54.84		47.23		34.94		26.31	a	5.74		31.44
1907	-0.35		1.07		14.13		27.50		35.52		48.13		55.55		50.61		46.70		30.87		26.30		20.30	a	29.69
1908	11.06		3.32	a	18.58		18.77		41.55		49.17		56.10	a	-----	z	47.27		35.13		26.60		-----	z	30.75	b
1909	6.10		7.36		17.67	a	29.83		39.79	b	48.57		52.19		49.77		45.27		35.39		27.87		14.42		31.19
1910	7.87		7.48	a	23.03		34.83		39.42		48.30		54.00	a	51.19		44.37		35.39		26.17	a	3.84		31.32
1911	7.65		4.29		13.48		28.07		46.06		52.38	a	59.40	a	55.16		46.97		37.48		27.17	a	21.71		33.32
1912	-3.03		5.38		17.55		29.52	a	43.13		47.80		56.17	b	51.83	b	46.60		38.90		29.48	a	18.97		31.86
1913	18.37	a	7.04		23.03	b	33.72	a	40.45		48.47		56.39		52.42		46.30		46.42		30.60		19.35		35.21
1914	2.17	a	-0.04		23.19		29.17	a	43.35		47.93	c	54.13		54.83	b	47.73		39.19		24.03		10.11	c	31.32
1915	10.45		16.46	b	20.87	a	34.70		40.52		47.87		55.94		56.19		50.29	b	38.83	a	29.63		18.93	a	35.06
1916	11.77	a	9.14		13.32		29.70		40.65		50.50		58.48		56.19		48.20		36.63	a	22.90		14.87		32.70
1917	9.97		0.93		20.33	a	30.33		36.87		50.17		58.94		58.03		43.50		36.23		22.73		2.55		30.88
1918	-1.50	a	1.85	a	15.55		29.87		45.55		47.80		58.55		53.97		45.43		39.23		29.27		14.87		31.70
1919	10.06		13.61		23.50	a	30.53		38.60	a	49.23		54.74		52.23		47.23		37.23		26.90		6.61		32.54
1920	-1.61		6.07		19.13		29.77		29.65		48.89	c	57.48		58.68		50.40		42.90		25.10		19.48		32.16
1921	11.87		12.07		27.35		36.50		42.16		50.70		60.42		53.13		48.77		37.84		25.70		12.00		34.88
1922	0.17	b	8.18		22.32		33.70		42.40	a	54.40		56.61		56.48		47.23		37.77		27.70		7.61		32.88
1923	3.45		-1.75		11.55		28.70		41.23		50.67		52.83	a	50.94		48.53		36.77		26.97		23.00		31.07
1924	8.10		0.76		22.57	a	29.93		39.84		47.30		55.26		54.45		46.07		36.06		26.47		8.97		31.31
1925	-2.42		16.00	a	23.61		30.47		38.84		50.93		55.19		52.65		44.80		30.61		24.47		13.10		31.52
1926	5.97		6.32		10.94		25.73		37.16		47.00		53.77		52.65		44.03	a	35.00		26.60		7.61		29.40
1927	8.73	a	8.32		20.58		28.66	a	37.13		46.10		57.00		51.32		46.20		39.81		29.83	a	15.90	a	32.46
1928	8.90		7.41		18.58		28.27		38.90	a	47.06	m	59.32		60.26		46.57		38.16		28.23		21.39		32.36	a
1929	9.52		9.64		24.26		31.33		42.81		53.17		55.68		53.81		49.37		38.23		28.70		13.19		34.14
1930	10.16		10.00		22.68		29.87		43.23		57.60		56.52		53.71		51.83	a	37.55		29.33		16.35		34.90
1931	7.45		12.22	a	26.45		33.57		43.26		53.00		59.74		55.80	a	50.00		39.84		33.37		19.07	a	36.15
1932	19.81		9.46	a	20.97		31.07		40.20	a	50.03		55.65		56.97		49.70		42.13		25.50		19.13		35.05
1933	17.52		15.85	a	20.87		32.60		41.74		51.83		55.45		55.06		49.70		38.23		22.34	a	5.68		33.91
1934	4.97		-3.89		17.23	a	32.27		42.60	a	51.53		56.23		50.45		52.90		35.74		31.66	a	10.57	a	31.85
1935	3.71		4.29		18.60	a	30.73		38.68		52.30		58.61		55.74		45.43		35.03		31.17	a	11.16		32.12
1936	8.87	a	3.55		26.94		31.93		41.34	b	51.37		53.90		53.03		47.40		35.32		22.63		16.61		32.74
1937	15.94		16.46		16.13		30.30		42.27	a	51.57		57.32		59.58		48.00		37.74		28.40		11.87		34.63
1938	6.71		12.21		19.23		32.36	b	39.74		53.52	a	58.68		57.90		45.53		38.03		27.43		17.42		34.06
1939	5.97		6.86		13.55		27.71	b	38.23	a	49.07		55.78	m	61.03		48.13		39.27	a	25.43		16.81		30.19	a
1940	4.65		12.38		21.32		30.17	a	43.74		51.33		58.48		53.13		49.57		36.57	a	30.10		14.30	a	33.81
1941	7.93	a	16.89		19.81		36.77		43.61		53.71	b	58.48		54.58		47.66	a	38.48		30.30		20.06		35.69
1942	8.97		11.46		28.55		33.37		47.58		54.07		58.07	a	55.61		51.50	d	38.13		27.43		13.00		35.64
1943	6.50	e	9.29	g	18.45		28.50		42.58		53.24	a	58.43	a	55.65		46.53		39.71		26.73		2.57	a	34.45	a
1944	4.66	b	4.04	b	17.19		29.37		44.97	a	52.60		58.00		58.84		48.52	a	37.58		29.86	a	12.65		33.19
1945	3.07	a	6.07		25.40	a	34.93		41.26		51.60		57.32		55.37	a	50.57		35.10		28.27		9.26		33.18
1946	7.33	a	5.32		25.90		33.30		43.06		50.93	a	54.58		54.63	a	47.17		37.32		30.90	a	17.83	g	35.50	a
1947	6.00	j	14.07		24.45	b	-----	z	48.22	v	49.90		62.42		57.42		48.43		40.74		26.87		10.00	a	37.14	c
1948	2.33	a	-0.62		15.87		32.10		41.89	c	48.30		56.65		57.00		46.73		35.63	a	34.59	a	17.87		32.36
1949	15.81		10.86		22.45		36.87		42.87		54.00		60.16		58.26		48.77		38.48		26.80		18.45		36.15
1950	11.90	a	5.89	a	16.63	a	31.90		42.48		52.50		57.26		54.00		43.50		37.71		30.97		19.63	a	33.70
1951	10.81		11.68		23.94		36.70		42.39		51.07		57.30	a	55.94		47.47		37.87		25.33		9.42		34.16
1952	9.58		12.41		23.52		34.53		41.61		54.00		59.77		56.71		47.23		35.94		28.13		19.97		35.28
1953	14.58		15.00		23.81		35.90		43.26		51.77		56.58		54.19		49.90		37.23		31.17		21.77		36.26
1954	3.80	a	15.96		20.93	a	30.83	a	42.87		52.83		55.81		53.06		45.93		40.17	a	28.57		15.84		33.88
1955	7.26		11.61		19.13	a	34.20		46.74		54.67		60.61		58.94		44.50	b	37.29		29.37		3.76	b	34.01
1956	16.81		11.45		12.91	h	30.47		37.39		51.83		54.74		52.55	b	44.55	a	35.58		27.40		17.84		34.60	a
1957	-0.61		13.68		25.39		33.97		43.94		53.80		54.97		51.84		49.10		37.93	a	31.47		18.90	b	34.53
1958	15.06		5.12	d	26.71		33.93	a	37.79	c	47.00	c	55.81	e	54.81		48.60		36.71		29.31	a	5.00		32.99
1959	7.71		3.71		19.06		33.00		44.48		50.70		58.79	b	58.97		50.13		40.06		30.50		22.50	a	34.97
1960	12.32		19.10		19.06		32.70		46.16		52.93		56.48		54.67	a	48.13		36.16		30.77		9.35		34.82
1961	0.81		10.79		18.87		31.31	a	41.29	c	51.13		56.40	a	55.43	a	54.60		41.29		32.80		17.55		34.36
1962	7.50	a	4.00	a	23.23		31.57		41.42		51.53		53.97		56.48		46.23		38.13		26.97		13.43	a	32.87
1963	10.55		1.04		20.71		31.70		41.26		51.93		59.19		54.03		43.53		39.06		33.53		8.58		32.93
1964	13.19		10.76		20.87	a	30.60		42.19		50.73		58.35		51.06		44.13		37.61		26.50		13.65		33.30
1965	5.58		9.36		22.45		28.97	a	41.26		51.13		53.29		56.27	a	47.60		36.68		27.53		16.37	a	33.04
1966	10.52		11.11		23.55		30.23		39.80	a	52.60		55.65		56.61		44.87		37.13		33.43		18.06		34.46
1967	13.97		2.50		15.84		29.80		37.74		53.79	a	61.35		57.35		48.13		40.80	a	26.70		17.00		33.75
1968	2.81		4.86		23.00		33.80		40.61		51.17		57.26		52.13		49.60		41.29		26.63		15.71		33.24
1969	10.87		13.18		20.74		30.97		41.97		52.37		56.03		58.26		49.20		37.10		32.47		20.45	b	35.30
1970	4.23		12.46		22.74		31.00		44.45		51.43		59.42		57.43	a	50.83		40.61		30.30		7.71		34.39
1971	0.16		11.39		21.42		32.27		43.00		51.43		55.68		55.26		50.47		42.32		26.13		12.74		33.52
1972	8.58		7.66		17.68		28.33		42.10		52.87		57.29		53.29		47.10		34.23		24.97		12.52		32.22
1973	9.48		10.68		25.90		31.68	b	41.84		53.27		58.94		60.90		47.18	b	37.80	a	28.07		22.39		35.68
1974	11.26		11.43		20.58		31.97		39.35		51.38	a	57.58		55.68		49.00		32.90		28.67		20.48		34.19
1975	12.48		10.89		19.48		30.72	a	46.00	a	52.24	a	59.87		55.52		47.17		39.10		31.37		12.80	a	34.80
1976	2.74		13.48		22.06		33.43		42.45		54.90		55.81		55.16		47.43		34.77		26.40		7.53	a	33.02
1977	1.77		9.71		28.42		31.50		42.97		52.67		55.77		55.81		47.73		38.20	a	31.77		14.77		34.26
1978	8.10		5.25		19.52		31.47		43.87		52.23		56.35		54.97		41.72	a	37.40	a	23.73		12.16		32.23
1979	12.90		5.57		26.07	a	31.23		45.32		50.97		57.23		54.74		45.37		37.87		30.37		15.52		34.43
1980	9.94		7.24		17.45		30.63		40.53	a	47.73		55.81		54.94		44.23		32.19		23.90		4.97		30.80
1981	-3.65		18.89		22.48		30.17		42.61		50.40		55.39		52.45		46.83		33.61		26.80		18.16		32.85
1982	-2.53	a	5.26	a	18.10		25.38	a	39.55		48.17	a	54.23		52.10		48.14	a	34.48		30.73		19.48		31.09
1983	11.24	b	13.96		25.35		34.37		43.10		49.97		56.74		56.00		48.50		35.77		29.50		13.74		34.85
1984	5.07	a	19.39	a	14.90		32.03		39.42		51.70		57.68		57.90		43.10		36.77		28.20		17.58		33.65
1985	-0.06		11.07		20.00	a	30.34	a	40.37	a	48.83		57.13		53.61		47.67		38.65		29.67		12.69	b	32.50
1986	11.24	b	9.96		21.21	b	35.07		41.87		48.77		55.50	a	54.45		44.50		36.33	a	24.62	a	16.65		33.35
1987	8.59	b	6.72	c	21.77		36.79	b	39.94		52.69	a	57.68		52.00		47.40		37.20	a	25.34	a	19.74		33.82
1988	7.65		11.31		20.45		32.87		44.90		48.69	a	60.94		59.94		46.37		35.33	a	31.37		12.48		34.36
1989	8.65		9.75		18.40	a	28.87		44.45		53.90		56.16		55.87		48.57		35.26		25.14	a	-4.57	a	31.70
1990	17.58		11.32		19.90		31.37		39.87		48.97	a	57.84		57.65		48.33		39.00	a	29.37		22.16		35.28
1991	6.84		13.00		24.28	b	32.07		41.57	a	49.57		55.00		56.32		44.90		39.77	a	31.63		12.39	c	33.94
1992	8.83	a	11.46	a	18.58		26.37		39.20	a	51.77		53.23		55.94		46.70		35.84		23.97	a	15.94		32.32
1993	10.53	a	0.71		14.10		27.90	a	41.97	b	51.30		57.33	a	56.84		47.82	b	32.39	c	26.34	a	17.55		32.07
1994	-5.83	b	-0.70	a	20.03	a	30.72	a	41.17	a	54.93		61.67	a	55.48		48.38	a	38.21	b	29.10		18.63	a	32.65
1995	15.83	b	5.96		22.10	a	28.59	a	41.39		54.21	a	60.33	a	55.81		41.90	a	39.20	a	25.46	b	10.97		33.48
1996	7.23	a	10.21	a	17.84		32.73		40.39		53.77		58.24	b	56.77	a	50.30		35.68		24.59	a	25.17	a	34.41
1997	8.27	a	11.19	a	17.43	c	29.27		39.17	a	51.43	b	57.19		56.33	a	48.47		36.23		26.14	b	15.10	a	33.02
1998	13.30	a	18.18		23.07	a	32.83	a	46.45		53.39	b	58.19		56.39		49.38	a	39.33	a	30.28	a	20.21	b	36.75
1999	5.96	c	13.76	c	24.29		33.30		45.16		56.28	a	60.78	d	55.68		54.14	a	34.33	a	32.10	a	20.31	b	36.34
2000	6.78	d	9.29	a	24.42		33.10		41.83	a	51.86	a	54.87	a	55.03		46.72	a	36.23		31.71	f	13.16		33.94	a
2001	3.76	b	5.08	b	17.20	a	29.28	a	42.23	e	55.23		55.79	c	57.90	b	48.93		36.47	a	30.55	a	20.35		33.56
2002	15.65		12.11		21.32		33.28	a	39.60	a	50.77		57.77		57.39		49.50		34.42		25.67		13.61		34.26
2003	-0.16		3.39		15.17	b	27.57		41.58		51.93		58.55		58.81		49.50		37.52		28.47		16.10		32.37
2004	1.42		6.34		22.45		30.90		42.55	b	49.03		58.31	b	57.94		48.53		37.40	a	27.76	a	13.84		33.04
2005	4.94		9.21		17.10		31.82	b	41.23	a	53.57	b	57.90	b	57.32		50.63	c	42.23		29.17		16.10		34.27
2006	16.35		14.00		21.68		32.87		45.45		57.60		61.77	a	55.10	a	48.07		37.37	a	34.00		23.03		37.27
2007	11.59	b	3.71		18.47	a	32.67		41.94		53.20		57.32		56.34	b	48.57		43.00		27.17		11.94		33.83
2008	12.74		12.83		18.29		32.93		41.84		55.07		61.23		57.10		49.67		36.03		30.17		14.68		35.21
2009	0.45		8.11		18.55		34.77		43.90		52.57		57.16		58.90		46.87		36.42		31.23		16.94		33.82
2010	12.94		19.96		27.94		37.17		45.16		53.77		62.19		56.94		52.33		38.45		29.67		17.71		37.85
2011	7.55		7.46		20.87		33.27		46.65		52.70		60.13		58.71		52.77		41.39		31.20		21.10		36.15
2012	12.65		16.31		25.97		33.80		47.23		53.07		60.32		60.26		47.93		41.87		27.40		19.58		37.20
2013	9.42		15.86		25.32		31.67		42.97		54.60		61.29		55.87		50.07		39.06		25.48	a	11.71		35.28
2014	6.42		8.32		10.68		31.50		44.55		52.47		60.19		56.90		48.20		42.42		26.23		21.87		34.15
2015	3.53	a	-7.00		10.97		30.40		46.65		50.40		57.94		59.74		53.27		34.65		29.80		25.06		32.95
2016	13.39		15.14		24.35		29.63		44.55		51.93		59.68		58.19		51.40		39.77		30.47		14.61		36.09
2017	16.42		14.52	a	16.84		34.97		44.32		53.67		57.97		55.90		53.47		44.06		26.77		9.81		35.73
2018	6.65		16.71		23.90		30.70		44.55		50.04	b	60.97		60.90	b	51.33		37.16		25.59	a	14.60	a	35.26
2019	8.00		10.25		17.23		32.83		41.23		51.77		60.42		56.90		48.80		39.76	b	24.93	a	17.03	a	34.10
2020	15.97		13.11	a	24.48		31.57	b	43.21	b	53.73		62.16		57.87		49.10	a	39.58		30.63		22.61		37.00
2021	17.65		13.96	a	22.68		35.20		45.00		56.27		57.97		60.97		52.90		43.74		28.87		18.13		37.78
2022	3.71		10.71		23.00		33.67		44.00		52.80		59.10		61.77		51.00		41.16		32.00		23.87		36.40
2023	20.65		12.43		25.32		35.97		43.45		54.23		64.23		58.39		55.57		47.00		27.90		24.03		39.10
2024	16.55		19.48		27.84		34.08	f	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	21.29	i
Period of Record Statistics
MEAN	7.91		9.19		20.60		31.51		41.91		51.46		57.47		55.62		47.95		37.72		28.00		14.80		33.77
S.D.	5.51		5.22		4.03		2.70		2.69		2.34		2.29		2.66		2.59		2.82		2.88		5.59		1.79
SKEW	-0.05		-0.32		-0.21		-0.66		-0.72		0.01		0.24		-0.15		0.26		0.43		-0.24		-0.59		0.21
MAX	20.65		19.96		28.55		37.17		47.58		57.60		64.23		61.77		55.57		47.00		34.59		25.17		39.10
MIN	-5.83		-7.00		10.68		18.77		29.65		46.10		52.19		47.69		41.72		30.61		18.43		-4.57		29.40
YRS	127		127		128		127		127		126		127		127		128		127		126		125		115