BOUNDARY DAM, WA

Average of Minimum Temperature (Degrees Fahrenheit)

(450844)

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
1965	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	51.32	c	53.52		40.00		38.43	a	31.62	a	25.48		40.06	f
1966	22.14	c	25.00	a	26.55		31.46	b	41.06		45.43		49.93	b	47.16		46.60		36.00	a	30.37		28.23		35.83
1967	23.10		24.21		27.10		30.70		39.46	c	47.77		49.90		50.16		46.60		36.30	a	28.73		18.52		35.21
1968	19.19		20.97		28.80	a	32.52	e	39.13	a	46.00	a	50.63	a	49.77		44.03		34.19		29.03		15.97		34.19
1969	8.26		17.54		22.65		34.60		41.23		50.07		47.77		45.81		44.20		34.10		30.33		25.00		33.46
1970	17.16		23.39		23.00		31.27		38.30	a	49.50		52.55		47.48		39.00		33.06		25.70		-----	z	34.58	a
1971	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1972	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1973	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1974	-----	z	-----	z	-----	z	36.28	a	39.26		48.96	b	50.81		49.71	g	40.80		31.29		31.77		26.10	a	38.16	d
1975	15.23		16.37	a	24.17	a	28.40		39.65		46.13		55.16		48.29		42.00		37.25	c	26.38	d	-----	z	34.46	a
1976	20.80	a	21.62	c	20.73	a	33.38	a	40.20	a	43.63		50.87	a	51.84		44.67		34.23	a	25.97		22.29		34.19
1977	12.89	c	22.11		27.00		31.76	a	39.43	a	47.00		49.65		49.47	a	41.17		31.84		23.33		15.16		32.57
1978	16.42		24.04		26.10		34.27		38.87		46.68	b	52.42		49.32		45.07		-----	z	22.37		11.37	a	33.36	a
1979	0.81		19.29		23.93	a	31.20		39.32		45.97		49.93	a	50.40	a	43.77		36.29		24.07		26.70	a	32.64
1980	10.52		22.59		25.48		35.37		45.03		47.57		49.35		46.42		42.20		36.39		28.83		25.52		34.61
1981	24.74		22.36		28.55		32.63		43.19		45.27		50.40	a	50.19		42.60		34.19		31.90	a	20.81		35.57
1982	16.29	c	18.21		26.52		28.76	a	36.93	c	49.07		49.16		49.94		44.83		35.79	b	23.72	a	18.83	a	33.17
1983	23.61		27.11		33.13	a	33.90		40.06		48.00	b	49.97		51.44	f	38.34	a	32.23		32.63		8.06		33.37	a
1984	19.35		23.10		28.61		32.71	b	36.70	a	43.80		47.70	a	45.42		35.73		30.19		26.10		9.87		31.61
1985	14.42		12.36		21.00		30.50	b	39.94		45.59	a	49.26		45.87		38.50		31.52		14.00		15.19		29.84
1986	21.81		16.36		27.77		32.80		39.81		49.10		47.53	a	47.52		39.90	a	34.60	a	26.23		19.39		33.57
1987	14.42		22.89		28.77		35.33		42.20	a	47.40		51.87		47.16		41.53		31.71		33.63		21.45		34.86
1988	14.77	a	20.31		28.13		34.33		41.68		48.60		49.35		47.77		41.77		38.16		31.10		20.10		34.67
1989	17.90		10.93		25.39		32.73		39.53	a	48.28	a	49.42		50.39		40.47		33.94		29.80		25.87		33.72
1990	24.13		18.00		26.35		35.27		41.52		46.77		52.61		50.74		42.03		32.26		30.30		11.71		34.31
1991	11.77	a	28.68		25.10		32.07	b	40.45	b	46.10	a	51.50	a	52.00	c	42.14	a	28.65		27.10		23.29		34.07
1992	26.42		29.10		29.65		34.76	a	40.90		51.50		52.03		48.10		39.03	a	34.97		30.04	e	14.80	a	35.94
1993	10.31	e	15.28	c	24.67	a	34.21	b	43.23	a	46.59	a	50.07	a	48.63	a	40.77	d	34.80	a	20.57	b	22.10		32.60
1994	26.23	a	19.29		25.93	a	36.37		41.52	b	45.92	d	51.55		47.52		43.10		34.45		26.00	a	20.61		34.87
1995	19.29		22.52	a	25.19		30.37		40.00		48.37		50.77		46.10	a	42.45	a	35.10		27.62	a	21.71		34.12
1996	16.86	b	15.21		23.30	a	33.83	a	39.45		45.87		51.00		47.55		40.70		33.94		26.10		17.03	b	32.57
1997	16.97	b	20.57		25.27	a	29.32	b	41.33	a	47.10		51.83	b	50.23	a	45.87		36.87	a	28.66	a	23.27	a	34.77
1998	21.65		27.18		29.74		33.47		42.71		49.00		56.48		50.35		46.55	a	36.32		32.43		21.16		37.25
1999	25.23		25.89	a	27.13	a	29.25	b	37.34	b	45.53		46.97		51.45		38.07	a	32.63	a	33.31	a	26.74		34.96
2000	19.63	a	22.19	b	29.03		32.53		38.69	b	45.83		49.73	a	47.32		39.80		33.23	a	22.37		19.27	i	34.58	a
2001	21.89	c	17.96	a	26.87		31.97		39.83	a	45.47		50.40	a	49.24	b	43.28	a	32.48	b	32.67		21.50	a	34.46
2002	21.38	b	20.33	a	22.13		30.34	a	38.61		47.23		50.30	a	45.71		41.03	a	28.76	b	27.48	a	27.17	a	33.37
2003	25.10		22.00		28.13		33.47		39.77		47.24	a	50.55		49.45	b	40.54	b	36.46	g	20.53		18.69	b	34.13	a
2004	21.71	c	21.89	a	26.34	b	31.70		39.77		46.03		50.90		51.97		42.27		34.48	d	26.46	b	24.00		34.80
2005	16.07	b	16.14		25.13		30.00		40.06		45.83		47.52		44.97		36.93		34.94		27.63		13.00	a	31.52
2006	26.23		14.11		22.87		30.87		37.57	c	46.36	b	51.61		44.74		39.30		29.65		24.74	c	16.79	b	32.07
2007	11.71		22.52	c	24.19		30.17		37.26		44.93		52.03		44.32		35.67		28.94		18.17		13.65		30.30
2008	8.23		16.04	a	19.97		22.87		34.32		38.15	c	44.10		43.16		33.73		26.32		30.60		14.90		27.70
2009	18.29		21.37	a	25.96	e	32.17		37.57	c	47.33		51.93	a	51.35		43.53		32.29		29.83		15.03		33.89
2010	25.48		29.32		28.90		32.23		37.90		47.83		49.84		48.48		44.57		36.97		27.23		21.03		35.82
2011	19.45		14.75		27.65		30.90		39.84		47.30		51.55		50.00		42.80		36.39		25.17		20.35		33.85
2012	18.68		22.76		26.61		34.27		39.06		47.37		53.97		49.30	d	41.40		34.34	b	31.60		27.29		35.55
2013	18.71		26.39		26.77	a	31.43		40.41	b	47.80		51.06		52.26		47.20		32.10		25.30		16.29		34.64
2014	22.83	a	7.81	b	22.50	a	29.59	a	40.70	a	46.37		53.48	b	52.87		42.43		38.16		24.60		22.84		33.68
2015	23.00		27.00	a	29.68		31.30		41.52		50.67		54.16		50.65		40.90		36.19		26.74	c	24.42		36.35
2016	26.70	d	28.28		30.52		37.10		43.52		48.13		50.93	d	49.00	a	41.73		38.32		34.76	a	15.94		37.08
2017	12.26		18.50		27.65		34.17		41.97		48.37		53.03	b	51.23		43.67		32.10	a	29.87		18.90		34.31
2018	25.67	a	17.04	a	27.71	c	32.62	a	44.72	f	46.50		50.39		49.74		41.47		33.13		29.30		24.10		34.33	a
2019	22.77		10.18		21.81	d	33.28	a	42.42		47.13		50.59	b	51.35	e	46.30		31.36	f	25.58	d	25.26		34.24	a
2020	24.37	a	21.68	a	24.13	a	29.43		42.23		48.28	a	50.54	c	48.89	c	44.67		35.10	a	28.87		24.96	c	35.26
2021	23.63	d	17.65	e	25.85	d	30.53		38.43	a	50.58	d	56.97	b	51.86	c	43.71	b	35.85	e	30.10	a	17.23	a	35.20
2022	19.68		17.00	c	27.72	b	28.90		39.57	a	48.00	b	53.77	a	52.27	a	43.63		37.23		19.69	a	14.37	a	33.48
2023	25.59	b	19.85	b	21.48	b	30.25	b	47.30	a	48.72	a	51.00	a	50.89	c	43.85	d	35.87	a	25.70		24.82	c	35.44
2024	17.65		25.39	f	24.73	a	29.94	n	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	21.19	j
Period of Record Statistics
MEAN	19.08		20.47		26.00		32.11		40.14		47.09		50.89		49.03		41.94		34.05		27.41		20.09		34.00
S.D.	5.58		4.89		2.72		2.45		2.18		2.04		2.21		2.40		2.89		2.72		4.12		5.02		1.82
SKEW	-0.85		-0.29		-0.11		-0.72		0.48		-1.27		0.11		-0.39		-0.51		-0.61		-0.78		-0.38		-1.13
MAX	26.70		29.32		33.13		37.10		47.30		51.50		56.97		53.52		47.20		38.43		34.76		28.23		37.25
MIN	0.81		7.81		19.97		22.87		34.32		38.15		44.10		43.16		33.73		26.32		14.00		8.06		27.70
YRS	55		54		55		55		54		55		56		54		56		53		56		53		46