COULEE DAM 1 SW, WA

Average of Maximum Temperature (Degrees Fahrenheit)

(451767)

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
1934	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	96.26	h	76.53		65.00	a	50.82	b	38.20	k	64.12	i
1935	34.03	a	44.54		51.21	l	-----	z	-----	z	80.76	i	90.87		90.29		86.17		64.65		40.66	a	34.29		60.69	d
1936	35.94		25.14		52.00	a	69.43		81.17	b	81.00	b	93.13		91.06	m	80.44	c	72.23		41.23		40.19		61.08	a
1937	19.43	a	33.39		55.06		62.03		76.71		80.20		93.50	a	85.50	a	82.45	a	67.83	a	48.42	d	39.23	e	61.98
1938	35.47	a	39.39		52.47	a	67.37		76.97	a	87.40		96.33	a	90.10	a	88.30		67.00	a	44.20		37.04	d	65.17
1939	38.58		38.82		53.71		69.68	b	77.84		78.23		93.48		94.48		83.62	a	65.03		46.59	a	43.35		65.29
1940	35.58		41.10		58.57	a	65.03		79.23		87.77		90.84		91.52		81.73		65.10		40.20		38.58		64.60
1941	36.00		45.32		62.45		69.57		72.29		78.57		93.42		85.06		71.13		62.87		50.07		40.42		63.93
1942	30.13	a	41.61		54.77		66.63		67.58		73.07		80.84		89.73	a	81.53		66.94		40.28	a	33.90		60.58
1943	24.61		-----	z	46.68		63.97		65.32		73.43		87.84		84.23		81.33		61.32		42.63		33.03		60.40	a
1944	31.06		37.90		49.68		65.20		75.48		82.43		90.45		86.71		79.77		67.87		41.80		32.65		61.75
1945	35.35		44.36		52.00		60.43		73.97		81.17		92.74		92.32		73.69	a	66.47	a	42.43		37.42		62.70
1946	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1947	31.84		42.46		55.23		63.00		76.97		75.23		86.19		83.52		74.63		57.97	a	43.43		35.87		60.53
1948	31.94		36.03		47.94		54.93		64.42		80.67		80.55		79.13		73.60		59.00		44.53		27.32		56.67
1949	17.71		32.50		49.52		64.90		75.61		78.60		85.74		85.55		77.24	a	58.74		50.33		35.06		59.29
1950	15.68		33.89		45.68		57.21	f	67.13		73.97		87.84		-----	z	88.65	d	55.63	a	42.37		37.32		54.82	b
1951	33.32		38.18		42.29		63.47		72.13		77.90		88.52		84.90	a	77.10		56.45		42.43		28.26		58.75
1952	26.97		37.93		47.48		63.50		71.90		78.00		87.26		86.00	a	79.67		68.35		41.27		34.42		60.23
1953	40.87		43.07		51.10		57.97		67.32		70.37		85.26		83.35		77.17		64.58		47.50		38.55		60.59
1954	30.71		40.57		47.58		57.43		71.45		72.73		83.35		79.03		72.33		58.35		48.97		35.68		58.18
1955	31.10		33.79		41.87		53.10		63.53	a	79.00		81.84		85.58		75.47		58.00		34.50		29.87		55.64
1956	32.42		28.97		45.16		65.10		73.71		73.23		88.74		85.00	a	76.47		57.10		37.67		35.00	a	58.21
1957	19.19		32.82		47.23		61.93		72.55		77.27		83.06		80.74		79.97		56.10		44.10		40.20	a	57.93
1958	37.77		46.50		50.16		58.00	a	79.06		82.20		90.45		90.52		73.03		62.42		41.60		35.39		62.26
1959	33.94		34.00		49.55		61.90		64.48		76.17		88.61		80.32		69.13		57.29		41.33		35.00		57.64
1960	27.84		40.38		49.58		60.13		64.58		78.60		93.48		80.84		77.57		62.71		44.97		31.42		59.34
1961	36.00		45.14		51.29		59.80		68.03		84.60		90.03		92.03		72.83		58.94		40.93		33.74		61.11
1962	30.23		40.25		47.58		65.27		65.13		78.17		86.77		81.61		78.10		58.42		46.70		39.16		59.78
1963	29.81		42.21		52.87		57.70		71.10		77.90		82.81		86.71		82.20		64.00		45.70		32.19		60.43
1964	35.35		39.90		47.68		59.47		69.06		77.20		85.94		80.48		72.60		62.32		41.53		29.87		58.45
1965	33.94		39.61		48.74		62.77		69.03		79.03		87.52		84.13		71.47		64.77		46.17		35.90		60.26
1966	32.90		40.71		50.71		62.70		73.52		74.90		83.03		85.61		78.97		60.13		47.67		39.29		60.85
1967	40.23		47.14		49.71		55.80		68.52		81.80		89.03		93.77		83.47		60.29		45.70		34.03		62.46
1968	35.55		44.28		54.52		59.63		71.68		78.73		90.74		80.00	a	75.70		56.55		43.20		33.10		60.31
1969	21.55		33.29		49.03		60.30		75.00		83.77		86.65		85.35		74.70		57.57	a	43.70		35.74		58.89
1970	31.55		41.61		48.84		55.10		70.19		83.47		86.97		86.77		70.10	a	59.48		42.43		33.74		59.19
1971	34.71		40.96		43.71		59.23		72.10		71.80		87.13		92.32		69.90		58.26		43.87		32.16		58.85
1972	30.68		38.24		52.00		57.10		70.84		76.40		83.52		87.65		69.10		61.32		44.03		33.16		58.67
1973	32.74		39.39		52.84		63.37		72.58		78.00		87.10		86.35		74.40		58.52		41.27		40.10		60.55
1974	32.68		43.32		49.61		59.77		65.23		81.77		83.68		86.16		80.00		64.97		45.80		38.11	c	60.92
1975	32.65		34.59	a	43.16		55.87		68.45		75.07		90.00		80.06		78.17		58.39		44.73		37.37	a	58.21
1976	34.80	a	41.07		46.87		58.43		69.55		73.47		82.97		78.74		79.93		60.97		44.53		33.66	b	58.75
1977	26.77	a	43.29		50.52		67.83		65.65		81.80		83.48		89.81		69.47		60.65		43.13		33.90		59.69
1978	31.87		38.68		52.87		59.57		68.52	b	82.66	a	86.50	a	83.10	b	72.45	a	63.19		38.76	a	29.52	h	61.65	a
1979	20.58		36.79		54.52		61.10		73.65		83.37		90.13		88.00		80.60		65.13		38.37		40.13	a	61.03
1980	26.19		36.75	a	49.00		65.30		69.37	a	74.77		86.81		82.74		76.23		63.10	a	44.73		37.42		59.37
1981	39.10	b	43.41	a	56.10		61.37		67.81		73.63		83.84		91.58		77.63		59.03		47.63		35.39		61.38
1982	31.73	a	41.81	b	51.50	a	57.97	a	71.04	e	82.25	b	84.21	b	86.07	a	75.75	b	60.48		40.38	a	33.21	c	59.70
1983	38.63	a	43.92	c	53.54	c	61.47		74.79	b	78.29	i	80.00	d	87.57	c	73.61	b	62.00	c	47.72	a	25.36	c	58.96	a
1984	35.73	a	40.32	a	54.13		58.67	f	65.48	d	74.89	b	88.33	a	87.97		73.33		59.33	a	43.07		26.55	b	59.01	a
1985	26.70	a	33.89		48.50	a	64.81	c	74.48	d	81.54	b	97.93	d	85.48	d	69.48	e	59.89	c	29.33	c	24.93	a	58.08
1986	33.97	a	39.08	c	54.72	b	60.37	c	74.04	c	86.92	e	83.24	b	92.76	f	65.41	h	64.40	a	44.36	b	33.58		57.47	b
1987	33.06		44.09	e	54.28	b	67.00	a	75.87	a	84.67	c	-----	z	-----	z	83.32	b	66.32		46.61	b	34.97	b	59.02	b
1988	32.07	c	43.27	c	53.27	a	63.08	d	70.46	c	79.33	c	87.44	d	87.60	f	78.10	a	69.34	b	45.34	a	33.65		59.58	a
1989	36.03	a	32.54	b	47.03	a	65.23		69.14	b	80.33	c	87.57	a	81.93	a	78.21	b	59.89	c	46.79	b	34.87		59.96
1990	40.67	a	39.44	a	54.45		65.96	c	66.07	a	75.70		89.19		85.93	a	84.03		57.96	c	48.60		28.80	a	61.40
1991	29.32		48.18		49.63	a	62.11	b	67.61		73.15	d	87.52	d	87.39		82.14	a	63.04	c	41.86	b	39.00	c	60.91
1992	37.03	b	44.62		59.59	b	62.43	b	76.90	a	85.11	b	83.52		86.84		74.27		62.63	a	40.25	b	28.26		61.79
1993	24.90		32.82		46.45		56.72	a	-----	z	76.27		75.33	a	81.10		78.10	a	64.80	a	41.14	a	34.57	a	55.66	a
1994	38.87		37.57		57.03		65.32	b	72.55	b	78.29	b	91.32	c	88.38	b	81.55	a	61.21	b	39.24	a	36.53	a	62.32
1995	33.58		46.07		51.66	b	60.83		73.68		77.55	a	85.97	a	80.97		79.53		58.16		46.90		34.39		60.77
1996	30.03	b	35.97		49.26		61.86	b	65.00	b	77.66	a	89.62	b	87.57	a	72.70		58.17	b	39.23		28.94		58.00
1997	31.27	a	36.54		49.00	a	58.03		71.06		75.29	b	84.10	a	87.83	a	75.83		58.93	a	45.10		34.84		58.99
1998	-----	z	44.57		51.97	a	61.97		72.00	a	-----	z	92.00		90.27	a	83.34	a	61.32		47.00	a	35.00	a	63.94	b
1999	38.10	a	43.25		51.17	a	61.10		66.97	b	76.00		84.29		88.00	b	76.40		60.57	a	46.97		38.97		60.98
2000	33.19		39.93		50.53	a	65.43		68.00		77.81	c	85.57	a	86.10	a	73.79	b	60.00	a	36.50		28.38	b	58.77
2001	32.97		35.71		51.00	a	59.27		73.26		74.10	a	85.33	a	88.20	a	79.67		58.03	a	47.53		35.68		60.06
2002	37.67	a	41.63	a	46.13	a	59.83		66.73	a	79.34	a	90.21	b	84.33	a	76.69	a	59.46	c	45.17		37.37	a	60.38
2003	36.40	a	42.82		52.27	a	60.89	b	69.57	c	83.96	d	93.60	a	89.65	e	81.23		67.34	b	42.60		33.38	b	62.81
2004	32.48	f	39.89	a	58.31	b	68.04	e	71.47	a	82.64	b	92.55		89.83	b	74.89	c	64.30	a	48.03	a	37.69	b	66.15	a
2005	31.80	a	46.71		57.84		63.48	a	73.74		80.00	b	88.25	k	91.38	b	75.59	a	63.60	f	41.92	e	29.32		59.18	b
2006	39.72	b	42.96	a	49.90	a	61.29	b	70.77		79.52	a	92.75	c	87.65		77.68	b	60.13		41.69	a	31.72	b	61.32
2007	30.19		38.68		52.67	a	60.48	a	72.45		76.93	b	91.61		86.10		75.87		58.93	b	41.73		34.13		59.98
2008	28.24	b	39.31		47.97		56.03	a	71.25	c	77.21	a	87.14	c	86.33	a	77.38	a	60.45		44.11	b	27.23	a	58.55
2009	28.13		35.00		45.07	a	59.76	a	72.29		80.70		90.90	a	87.58		80.37		55.00	a	44.97		28.84		59.05
2010	38.31	b	43.89	a	53.29		60.24	a	65.19		73.90	a	86.87		84.83	a	73.23		61.65		40.40		34.69	b	59.71
2011	35.77		37.18		48.74		54.53		65.03		74.50		82.29		88.26		82.03		59.29		43.53		34.39		58.80
2012	32.65		38.24		49.48		62.40		69.39		73.57		88.71		89.61		80.07	a	60.77	a	44.80		36.13		60.48
2013	28.61		39.79		52.65		61.33		71.03		77.13		91.97		86.81		77.67		60.45		42.53		29.74		59.98
2014	33.77		34.86		51.23		61.17		72.45		77.50		91.68		87.68		77.60		64.00		43.43		36.94		61.02
2015	33.55		46.96		57.30	a	61.70		74.70	a	87.47		90.23		88.48		73.60		65.55		42.87		34.55		63.08
2016	32.87		44.07		53.26		69.27		73.32		80.00		84.16		87.55		74.77		57.32		50.30		28.61		61.29
2017	25.23		33.46		48.71		57.57		71.07	a	79.17		90.87		90.39		76.73		58.55		44.41	a	29.90		58.84
2018	35.16		39.82		50.03		58.77		77.52		77.37		90.32		87.45		73.73		59.42		44.10		37.26		60.91
2019	35.06		28.14		43.32		60.47		73.58		79.83		83.97		87.03		71.63		55.06		43.63		34.61		58.03
2020	37.03		43.86		51.45		61.83		70.52		76.67		87.10		87.97		79.73		61.00		44.20		34.97		61.36
2021	38.00		38.04		54.06		64.20		72.26		87.13		94.52		87.29		75.10		59.77		45.67	c	33.19		62.44
2022	29.53	a	36.46		53.00		54.23		63.97		75.24	a	90.23		92.07	c	80.10		68.73	a	34.97	a	25.16		58.64
2023	35.39		38.71		47.37	a	56.80		78.27	a	80.47		89.45		87.14	b	75.00	a	62.17	a	42.96	b	37.16		60.91
2024	31.29		41.89	b	53.13	a	61.35	g	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	42.10	i
Period of Record Statistics
MEAN	32.29		39.54		50.86		61.50		71.06		78.67		87.82		86.51		77.17		61.44		43.56		34.20		60.27
S.D.	5.21		4.57		3.92		3.77		4.07		3.95		4.04		3.59		4.28		3.62		3.61		3.92		1.84
SKEW	-1.01		-0.55		0.17		0.13		0.12		0.37		-0.17		-0.25		0.27		0.58		-0.76		-0.40		0.45
MAX	40.87		48.18		62.45		69.68		81.17		87.77		97.93		94.48		88.65		72.23		50.82		43.35		65.29
MIN	15.68		25.14		41.87		53.10		63.53		70.37		75.33		78.74		69.10		55.00		29.33		24.93		55.64
YRS	87		88		88		85		86		85		86		83		88		88		89		87		74