SISTERS, OR

Average of Minimum Temperature (Degrees Fahrenheit)

(357857)

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
1958	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	44.40	u	36.60		28.39		27.37		27.58		29.98	h
1959	24.45		23.33	a	26.16		26.90		31.00	a	40.53		41.90		38.65		37.59	a	30.90		21.37		20.10	a	30.24
1960	14.42		20.11	b	25.35		29.33		32.94		37.30		43.33	a	39.35		35.53		30.10		24.87		20.94		29.46
1961	25.00		29.96	a	26.62	e	29.83	a	33.71		41.27		41.55		46.28	b	32.22	c	29.03	a	22.07		21.32	c	31.57
1962	15.45		23.57		25.16		29.87		33.84		36.37		39.06		41.06		36.37		29.87		29.33		24.06		30.34
1963	11.81		29.79		22.79	b	29.00		34.77		38.37		38.84		41.45		42.17		32.10		28.76	a	22.35		31.02
1964	24.13		22.52	f	25.03		26.30		30.23		38.50		41.50	c	38.33	a	29.70		28.03		22.54	b	20.71		29.55	a
1965	24.19		24.68		19.87	a	27.93		27.61		36.97		43.03		44.35		31.03		30.97		29.77		18.68		29.92
1966	23.71		23.14		24.35		26.50		32.48		37.90		40.87		39.87		37.56	c	30.39		28.80		24.68		30.85
1967	27.19		24.64		25.32		26.03		32.32		40.30		41.90		44.39		39.50		33.00		28.30		19.61		31.88
1968	19.68		28.66		27.35		25.20		33.58		41.10		42.48		43.29		35.70		28.84		25.77		22.45	i	31.97	a
1969	15.68		18.43		22.58		27.53		36.90		44.27		40.81		37.58		-----	z	27.13		24.10		22.29		28.85	a
1970	22.23		25.29		25.45		27.03		32.42		43.20		44.65		39.77		32.97		26.87		27.60		20.77		30.69
1971	23.87		22.12	b	22.10		27.23		37.03		38.57		43.81		44.87		33.77		27.45		25.60		21.16		30.63
1972	20.00		25.07		29.16		26.60		34.52		40.27		44.32		42.61		-----	z	27.19		27.50		12.94		30.02	a
1973	17.23		23.61		25.16		27.60		34.42		38.87		40.29		37.71		35.97		29.81		27.13		28.90		30.56
1974	15.19		22.96		26.35		28.90		31.52		41.03		41.39		41.61		32.83		25.10		29.63		22.77		29.94
1975	22.74		19.89	a	22.87		25.73		28.16	f	35.60		45.16		37.55		31.30		33.03		23.70		25.16		29.34	a
1976	21.58		21.41		24.23		28.50		31.81		33.97		41.10		42.10		36.23		25.84		28.17		16.00		29.24
1977	13.13		25.62	d	25.65		28.00		32.03		41.47		38.35		43.32		32.97		27.24	b	25.48	a	25.94		29.93
1978	24.84		26.29		28.26		26.77		30.45		40.83		43.48		41.65		35.30		26.48	b	12.44	e	16.41	i	30.62	a
1979	-----	z	27.55	f	26.77		30.03		-----	z	38.38	d	42.10		42.30	a	38.21	b	34.24	f	24.33	f	26.50	c	34.90	e
1980	16.00	i	-----	z	-----	z	-----	z	-----	z	37.25	j	40.30	a	35.76	b	35.48	e	27.23	i	26.56	l	20.43	j	37.18	i
1981	23.59	n	20.17	j	24.30	k	28.29	i	31.58	e	37.83	f	36.93	d	39.92	e	32.56	l	27.90	j	24.22	l	23.62	j	36.14	i
1982	12.47	n	14.60	m	23.52	h	22.27	h	27.90	j	40.67		40.57	a	40.97		36.63		29.89	c	21.72	e	20.46	c	32.99	e
1983	23.87	a	28.36	f	31.74		24.64	e	30.05	j	36.52	e	40.80	a	44.20	a	32.03	a	29.23	e	27.43	b	13.33	m	32.27	c
1984	15.53	l	22.15	i	27.81	d	27.30		30.13	a	34.93		39.38	e	39.23	i	31.67	c	28.78	d	26.24	a	16.86	c	29.23	c
1985	17.10	b	18.44	j	24.61		27.97		29.18	c	36.82	b	43.52		38.48		31.45	a	27.21	g	13.64	e	6.77		26.95	b
1986	23.14	b	25.38	b	28.41	b	25.03		32.48	b	40.17		37.55		41.97		32.59	a	27.10	a	29.24	e	22.27	i	31.19	a
1987	20.53	l	20.06	j	27.10	j	31.55	j	-----	z	38.12	e	40.78	h	37.27	i	32.52	g	24.47	l	23.81	n	21.05	k	38.12	k
1988	19.89	m	21.75	m	24.48	h	30.95	k	32.21	l	38.67	i	41.90	k	37.17	h	33.70	j	30.22	m	29.17	f	19.56	f	-----	z
1989	22.45	b	10.04	b	27.04	e	32.03		33.74		37.63		39.16		39.90	a	34.17	a	29.21	c	24.50	b	16.23	e	28.84
1990	26.62	e	19.50	b	25.21	b	31.40		32.90		39.48	a	43.81		44.39		36.70		29.44	d	25.48	e	11.83	g	32.27	a
1991	16.86	b	25.32	c	25.17	b	28.24	a	32.74		37.80		42.55		45.93	b	35.20		27.79	c	29.55	a	23.85	d	30.92
1992	25.73	a	28.66		26.32		33.37		36.35		-----	z	41.77		40.55		36.73		31.00	a	25.53		16.87	a	31.17	a
1993	9.45	b	12.79		28.17	b	29.86	a	38.47	a	38.90	a	38.37	a	40.21	c	34.64	b	31.29	c	13.21	a	23.54	c	28.24
1994	23.63	a	19.78	a	25.50	a	31.53		34.97	b	36.53		41.86	b	39.03		36.20		26.76	b	20.81	c	19.93	a	29.71
1995	24.57	a	25.42	d	24.97	b	27.43	b	33.87		38.50		44.03		37.81		37.79	a	29.53	a	30.86	b	23.11	d	31.49
1996	23.93	b	22.73	c	26.10	b	31.37		32.81		36.83		43.90		42.71		34.03		30.90		27.17		22.97	b	31.29
1997	21.20	a	24.71		27.67	a	27.72	a	36.90	a	39.37	c	44.50	a	46.10	b	40.59	a	31.64	c	29.30	c	20.26	d	32.50
1998	23.70	d	27.13	e	28.19		28.55	a	37.07	a	40.60		48.61	c	43.41	d	39.10		27.45	b	29.93	a	21.75	c	32.96
1999	25.42	e	26.62	d	26.21	c	27.15	c	32.17	b	37.70	c	41.84		46.55	b	32.35	d	29.27	e	30.64	b	25.83	b	31.81
2000	21.04	e	25.50	a	22.80	a	29.32	b	31.07	a	35.64	b	39.71		38.81		35.10		28.20	a	19.86	a	17.43	a	28.71
2001	17.90	a	16.96	b	28.96	c	28.80	e	34.38	e	36.74	c	41.74	d	44.00	b	37.28	e	29.86	c	28.79	a	27.29	c	31.06
2002	26.00	e	22.31	b	23.76	b	26.15	c	31.00	e	41.55	a	45.23	e	39.59	b	33.93	b	21.93	d	20.67	i	27.56	d	30.82	a
2003	28.50	a	22.18		31.13		30.55	a	34.96	g	40.97	a	47.23		45.20	a	40.00	b	35.17	b	25.17	a	26.00	k	34.61	b
2004	20.40	f	23.87	f	29.77	i	29.11	c	34.53	n	42.27		46.65		47.80	a	37.63		31.94		25.30		25.71		35.80	d
2005	23.32	c	21.09	e	28.10	b	33.08	d	39.78	d	38.77		44.62	b	42.34	b	33.80	e	31.48	d	25.96	c	17.46	e	31.65
2006	27.54	e	26.87	m	24.74	h	29.89	b	36.42		40.77		44.63	a	40.68		35.72	a	26.44	d	29.25	b	18.64	c	33.00	b
2007	16.67	d	26.28	c	29.68	f	28.60	e	34.60	a	39.39	b	49.39		41.97	a	36.42	d	30.15	e	26.30	c	23.40	f	32.98	b
2008	19.35	h	24.75	e	23.74	d	26.23	d	39.24	b	34.97		43.43	a	45.58		34.97	a	32.28	f	29.37	c	15.92	f	33.59	c
2009	20.33	a	21.64		23.77		26.77		35.33	a	42.17		45.77		44.35		37.34	a	27.87	a	27.32	b	15.28	b	30.66
2010	28.84		25.57	e	24.50	c	28.36	e	36.07	d	39.18	b	45.89	m	41.68		39.00	b	31.58		25.47		23.93	b	31.29	a
2011	22.36	c	18.89		29.10		27.57	b	32.39		40.37		42.29		43.32		39.93		31.90		24.07		15.23		30.62
2012	23.48		24.38		26.16		32.17		35.39		38.90	j	44.63	a	42.42		34.96	b	29.65		29.20		23.74		31.47	a
2013	17.13		22.00	a	25.97		29.40		35.08	e	41.40		45.74		46.61	c	40.73		26.07	p	22.43		13.00		30.86	a
2014	21.06		24.00		26.73	e	28.37		35.39		38.37		47.81		47.32		39.53		34.90		17.97		23.84		32.11
2015	24.06		25.39		26.32		25.85	d	36.23		45.93		45.74		44.94		34.57		32.65		21.20		21.68		32.05
2016	19.19		25.55		27.00		31.70		35.48		41.20		43.10		42.71		33.67		32.90		30.07		10.26		31.07
2017	9.19		22.11		28.61		27.87		35.23		40.27		43.81		44.19		39.47		28.29		26.53		16.81		30.20
2018	26.32		18.79		24.52		30.17		37.90	a	41.03		45.13		44.16		33.07		27.19		22.30		21.64	f	31.87	a
2019	-----	z	18.77	f	15.88	f	32.76	i	36.06	o	39.84	e	43.10		44.74		40.23		23.48		22.13		20.83	a	33.48	e
2020	25.03		20.97		23.48		22.71	w	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	23.16	i
2021	-----	z	-----	z	-----	z	-----	z	-----	z	42.71	i	46.07	a	45.64	c	38.21	a	32.23		28.54	b	23.42		35.68	f
2022	21.00	a	22.67	g	27.77	r	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	21.00	k
2023	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
2024	26.37	l	25.88	u	28.39	m	27.43	g	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
Period of Record Statistics
MEAN	21.38		23.16		25.93		28.44		33.92		39.22		42.80		42.27		35.80		29.36		25.49		20.86		30.69
S.D.	4.69		3.83		2.26		2.06		2.61		2.38		2.71		2.85		2.85		2.61		4.23		4.61		1.11
SKEW	-0.81		-1.06		0.09		0.45		0.05		0.15		0.09		-0.14		0.08		-0.23		-1.33		-0.75		-0.19
MAX	28.84		29.96		31.74		33.37		39.78		45.93		49.39		47.80		42.17		35.17		30.86		28.90		32.96
MIN	9.19		10.04		19.87		24.64		27.61		33.97		36.93		35.76		29.70		21.93		12.44		6.77		28.24
YRS	53		49		53		55		51		56		59		59		58		55		57		50		32