MASON DAM, OR

Average of Minimum Temperature (Degrees Fahrenheit)

(355258)

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
1969	-----	z	-----	z	15.87		28.40		36.32		42.37		41.90		40.10		37.93		27.03		21.77		20.06		31.18	b
1970	17.10		19.57		21.81		24.97		33.90		44.67		45.26		40.68		31.90	a	26.19		25.27		10.52		28.48
1971	13.87		17.26	a	15.81		26.57		36.23		38.27		43.90		46.43	a	32.43		26.74		23.57		11.10		27.68
1972	10.80	a	13.61	a	25.10		27.31	a	35.13		41.67		44.03	a	44.90		34.67		28.35		26.10		11.40	a	28.59
1973	8.97	a	17.75		23.68		26.93		32.84		39.03		43.46	e	42.68		36.70		28.81		23.38	a	20.87		28.76
1974	7.71		14.71		21.35		28.13		32.48		41.40		43.33	a	38.74	h	31.50	d	23.81		21.23		12.29		25.27	a
1975	7.26		7.21		14.42		20.21	a	32.71		38.03		46.42		39.29		35.80		32.42		20.30		19.10	a	26.10
1976	11.42		12.76		15.65		26.67		33.45		37.57		45.55		44.90		40.19	d	29.21	b	29.27	d	15.39		28.50
1977	9.13		18.25		21.38	b	27.53		33.19		42.50		42.97		47.13		38.47		30.48		22.77		24.33	a	29.84
1978	20.74		24.25		27.87		30.67		34.56	d	39.87		45.61		43.35		38.20		28.94		21.20		9.10	a	30.36
1979	-0.81		20.07		23.30	a	29.19	d	34.04	f	39.17		42.83	a	46.10		39.07		33.10	a	21.41	a	21.62	j	29.34	b
1980	13.90	a	24.50	a	24.53	a	30.72	a	36.45		39.10	a	44.61	c	39.47	a	39.72	a	30.94		23.50	h	19.90	a	31.26	a
1981	23.77		19.21		26.25	c	30.73		36.74		40.40		42.23		45.90		38.21	a	30.42		27.43		21.84		31.93
1982	11.45		10.25		22.87		25.03		32.06		43.10	a	45.66	b	45.86	b	39.13		32.45		20.59	a	20.42	e	29.07
1983	22.43	c	23.04	a	28.61		27.37		33.97	b	38.07		42.81	d	48.40	a	34.97	a	31.16		26.54	d	10.81	d	30.68
1984	12.31	b	11.59		24.94		27.97		33.39		38.45	a	43.97	a	46.55		35.93	c	28.87		22.34	a	5.58	e	27.66
1985	1.52	b	-1.29		13.74		29.60		35.53	a	38.53		43.58		42.07	a	34.73		29.13		13.92	e	2.50	a	23.63
1986	12.37	d	22.50		28.30	a	28.00		35.39		43.97		40.50	a	47.54	c	36.00		30.32		26.83		17.22	d	30.74
1987	6.64	f	13.29		24.62	e	30.93		38.37	a	42.07	b	44.90	a	41.26		38.23		27.31	b	24.79	b	15.29		31.00	a
1988	9.67	a	8.76	d	20.04	e	30.17		34.94		41.73	d	44.61	c	42.30	a	36.07		33.40	a	25.93	b	9.60	a	28.10
1989	8.43	a	0.11	a	20.80	f	31.10		34.03		40.07	a	43.94		43.32		36.37		30.52		25.83		17.83	b	28.32	a
1990	18.03		11.58	b	24.00	a	32.15	d	32.97	b	39.22	c	45.74		46.76	b	41.34	a	31.35		25.28	a	5.76	b	29.52
1991	10.80	a	24.50	b	24.40	a	28.39	b	33.60	a	37.66	a	45.34	b	46.93	d	38.79	b	28.06		25.76	a	19.69	b	30.33
1992	16.81	d	25.19	b	27.50	a	31.63	c	36.55		44.42	d	44.30	a	45.38	b	37.76	a	31.54	c	22.29	b	11.18	c	31.21
1993	2.83	a	9.15	b	24.07	a	27.93	a	39.48		39.31	a	37.96	d	43.17	b	36.86	b	34.45	b	16.43		19.40	a	27.59
1994	19.31	b	14.77	b	23.10	a	32.90		39.16		40.50	b	46.83	b	45.35		40.00	a	30.29		20.00		11.93	a	30.35
1995	18.32		23.06	j	24.06		29.29	b	36.29	c	41.14	a	46.65		41.77		39.50		28.94		27.58	d	20.83	a	32.21	a
1996	16.10	a	12.11	a	24.52	b	30.53		33.50	a	40.07	a	45.70	a	44.07	a	35.89	b	30.57	a	26.17	a	17.93	a	29.76
1997	15.30	a	16.75		23.70	a	29.29	b	38.00		41.00		45.97		46.77		41.53		29.55	b	27.37		15.53	a	30.90
1998	16.94		18.12	b	22.35		30.29	b	38.04	c	41.67		50.13		46.68		45.26	c	29.39	c	28.25	b	14.93	d	31.84
1999	15.60	a	11.38	b	19.58		25.29	b	31.92	g	38.68	e	41.00	a	47.00	a	35.47		30.06		30.40		16.90		28.31	a
2000	13.90		20.52		21.74		29.86	a	36.19		41.03	a	44.77		43.90		38.07		31.52		19.27		15.50	k	30.98	a
2001	8.04	e	15.54	d	23.91	i	26.90	j	32.48	j	38.73	h	47.60	k	47.44	o	41.75	j	30.20	k	25.11	b	13.79	b	15.62	h
2002	-----	z	9.12	l	22.53	p	29.68	k	35.97		44.13		48.65		41.80	a	38.03		27.41	b	22.17		23.40	a	35.20	d
2003	25.57	c	18.82		28.13		30.72	a	35.93	a	41.50		48.81		47.90	a	40.07	a	33.71		22.00		23.14	c	33.03
2004	14.90		16.28		26.19		32.10	a	38.50	a	42.93		46.90	a	48.87	a	39.69	a	32.97		26.73		22.80	a	32.41
2005	19.17	a	16.75		27.60	a	30.40		39.47	a	39.72	a	46.52		46.10		37.33		33.45		25.14	a	11.50	a	31.10
2006	17.29	c	12.04		23.45		30.70		35.80	a	45.47	m	49.50	e	44.46	c	39.04	b	30.27	a	26.45	a	14.71		29.43	a
2007	8.90		22.61		26.52	b	29.47		35.13		41.80		50.55		44.48		37.47		30.19		23.00	b	14.58		30.39
2008	8.10	b	16.10		18.84		24.83	a	36.29		38.97		45.45		45.23		37.97		32.39		28.47		16.81		29.12
2009	13.47	a	14.14		20.52	b	28.00		34.77		42.90		46.32		46.84		41.07		30.97		24.27		12.29		29.63
2010	22.42		23.71		23.13		27.67		32.68		41.37		44.29		45.10		40.87		35.43	a	26.46	b	21.26		32.03
2011	14.45		16.74	a	24.74		27.47		31.45	b	-----	z	43.89	v	47.23		41.50		34.10		23.47		17.26		27.84	b
2012	17.26		18.21		26.16		31.34	a	33.52		39.90		48.81		46.06		39.73		31.61		30.86	i	19.06		31.97	a
2013	5.48		17.50		23.65		29.37		35.90		42.00		48.19		49.26		44.32	b	29.77		25.30		10.62	b	30.11
2014	15.68		20.68		27.13		30.07		35.58		40.33		50.13		48.71		41.33		34.97		25.85	c	24.58		32.92
2015	19.81		26.64		28.00		27.67		38.68		46.17		48.77		46.94		38.70		35.47	a	22.52	a	15.48		32.90
2016	13.61		18.66		28.00		33.60		37.45		41.70		45.29		44.74		37.77		35.39		30.23		5.74	d	31.01
2017	3.18	c	21.59	a	28.93	a	30.23		35.77		42.41	a	48.70	a	48.39		41.93		31.45		28.60		16.80	k	32.84	a
Period of Record Statistics
MEAN	13.33		16.47		23.48		28.92		35.40		40.88		45.39		45.07		38.20		30.73		24.36		15.57		29.89
S.D.	5.94		6.02		3.89		2.46		2.09		2.04		2.66		2.56		2.83		2.58		3.39		5.42		2.02
SKEW	-0.24		-0.80		-0.85		-0.92		0.21		0.39		-0.15		-0.56		-0.10		-0.12		-0.68		-0.35		-0.80
MAX	25.57		26.64		28.93		33.60		39.48		46.17		50.55		49.26		45.26		35.47		30.40		24.58		33.03
MIN	-0.81		-1.29		13.74		20.21		31.45		37.57		37.96		39.29		31.50		23.81		13.92		2.50		23.63
YRS	46		46		46		47		46		46		47		47		48		48		47		46		34