BONNEVILLE DAM, OR

Average of Maximum Temperature (Degrees Fahrenheit)

(350897)

File last updated on April 25, 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
1937	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	51.71	i	47.93	d	47.93	k
1938	46.26		46.50	b	52.94		64.93		68.76	f	80.04	g	85.20	a	79.90	b	79.10	a	65.77	a	47.97	a	46.87	a	61.54	b
1939	46.57	h	44.46		56.16		64.52	a	69.94		69.10		80.10		82.81		76.00	a	63.10	b	54.62	a	48.62	b	64.49	a
1940	42.28	b	48.92	c	58.03		62.10	a	72.68		79.33		79.68		83.87		73.90		64.80	a	47.11	c	44.41	d	63.09
1941	41.68		50.59	a	61.81		65.55	a	66.90		72.47		84.19		77.10		68.40		61.00		55.53		46.07	d	62.61
1942	33.19		46.50		54.52		62.47		64.52		68.37		81.26		80.23		76.00		66.16		47.73		44.77	a	60.48
1943	35.71		46.70	a	51.58		62.60		64.06		69.17	a	78.03		76.35		78.30		62.68		49.87		43.87		59.91
1944	40.81		46.45		52.48		58.57		65.90		69.03		78.71		77.00		75.63		66.90		47.77		39.19		59.87
1945	45.38	b	48.35	b	49.32		56.63		67.10	a	72.07	a	81.03	a	78.65		69.93		63.39		48.10	a	41.21	b	60.10
1946	45.11	c	46.93		51.77		59.83	a	68.45	b	68.37		77.58		78.71		70.79	a	56.93	a	48.74	c	46.45	b	59.97
1947	41.50	c	50.54		57.27	a	62.13		71.67	a	68.72	a	75.87		75.13		74.03		59.53	a	50.00	a	46.18	c	61.05
1948	43.27	a	44.82	a	49.87	a	55.33		63.65		73.90	a	74.52		73.71		71.60		61.03		48.47		39.94		58.34
1949	31.77	a	42.54		51.29		62.83		68.61		71.90		75.90		76.97		74.20		56.48		55.43		45.77		59.48
1950	29.42		39.64		49.19		56.87		64.48		70.43		77.71		80.87		74.33		58.42		49.57		46.29		58.10
1951	42.65		46.21		47.90		64.63		65.42		74.70		79.29		77.61		75.93		59.74		49.83		42.65		60.55
1952	35.58		45.83		49.50	a	62.80		67.90		67.87		80.39		78.81		77.57		70.94		46.27		41.97		60.45
1953	52.10	a	50.57		52.45		57.50		62.03		66.47		78.03		77.23		74.70		63.65		56.10		48.90		61.64
1954	41.35		45.89		52.06		58.53		66.61		66.43		71.42		71.55		70.83		59.87		54.57		43.06		58.52
1955	42.19		45.39		46.52		53.37		62.68		69.97		70.81		77.52		71.73		60.61		44.03	a	42.23		57.25
1956	40.97		37.48		49.87		61.93	a	69.58		68.07		79.87		75.10	a	72.43		59.48		47.23		45.35		58.95
1957	31.16		45.29		50.03		59.83		67.68		71.43		76.90		75.55		78.30		59.42		51.40		48.10		59.59
1958	46.26		51.43		51.68		58.10		72.74		73.73		83.35		83.00		73.27		65.03		50.83		46.77		63.02
1959	43.45		44.50		52.61		60.33		63.65		71.07		79.58		77.29		67.57		61.48		50.03		44.55		59.68
1960	35.97		47.07		50.52		58.67		61.87		73.03		81.90		74.94		71.83		62.71		51.70		41.65		59.32
1961	45.42		49.79		51.84		57.63		63.52		77.30		80.81		82.55		69.77		60.10		47.18	b	44.77		60.89
1962	43.48		46.70	a	48.97		62.43		58.90		71.93		76.84		75.87		72.73		61.77		52.27		45.94		59.82
1963	40.00		49.29		53.23		54.55	a	66.52		68.27		71.71		76.65		77.30		62.55		51.53		41.35		59.41
1964	46.61		49.41		51.39		56.90		62.74		67.97		75.61		73.58		69.27		63.39		47.00		41.68		58.80
1965	43.65		48.57		56.48		61.07		63.13		71.50		80.87		78.52		71.87		65.90		53.24	a	43.71		61.54
1966	43.96	c	46.39		52.45		60.80		67.39		71.41	a	75.26		79.06		74.27		61.81		52.87		45.87		60.96
1967	47.58		51.14		50.26		55.73		67.97		75.27		81.94		87.10		79.30		63.00		52.80		43.97		63.00
1968	43.26		52.76		56.84		58.70		66.00		72.10		79.58		75.10		72.07		60.71		51.77		42.26		60.93
1969	35.77		43.57		56.97		60.20		69.90		75.13		77.10		76.77		73.47		60.52		53.87		44.52		60.65
1970	41.13		51.86		54.42		56.03		68.13		76.60		79.68		80.58		69.73		60.90		51.00		43.68		61.14
1971	46.00		49.71		48.97		57.47		67.00		67.23		78.97		82.16		70.73		60.55		50.13		44.10		60.25
1972	44.06		47.25	a	55.90		54.93		69.42		71.17		81.52		83.68		69.90		63.42		52.37		40.29		61.16
1973	41.61		48.86		53.48		61.07		69.19		72.27		80.52		75.61		73.67		61.48		48.30		47.48		61.13
1974	40.37	a	48.07		52.81		56.93		63.13		74.00		75.90		78.61		79.10		67.13		52.67		48.13		61.40
1975	45.32		44.25		50.48		55.03		66.29		70.53		77.19		74.03		78.63		59.32		51.21	a	46.29		59.88
1976	47.03		46.76		50.52		57.40		67.13		68.77		77.10		72.97		74.00		64.16		54.00		46.00		60.49
1977	37.65		48.71		51.29		63.93		61.26		74.43		76.77		83.39		68.27		62.71		48.70		45.19		60.19
1978	40.97		47.07		56.77		58.87		63.68		75.37		78.35		76.71		68.24	a	66.03		47.30		42.90		60.19
1979	30.35		44.00		56.77		57.93		68.42		74.57		79.32		76.61		76.70		64.58		47.73		46.32		60.28
1980	38.04	d	42.90		50.97		62.27		65.19		66.93		77.48		74.97		72.27		64.89	d	51.43		47.35		59.56
1981	46.39		48.63	a	57.03		58.27		65.16		68.70		75.70	a	82.74		74.53		60.71		54.20		46.06		61.51
1982	43.93	b	47.29		54.26		57.37		67.00		74.30		76.26		77.81		71.87		60.58		48.13		44.61		60.28
1983	47.58		48.29		55.71		61.20		69.00		68.87		73.29		77.29		70.20		63.10		52.73		35.45		60.23
1984	44.61		48.03		55.52		56.33		63.23		68.55	a	79.61		80.74		70.97		58.68		49.73		41.71		59.81
1985	38.06		44.79		53.26		61.60		67.19		74.20		85.81		78.94		68.57		61.81		40.55	a	32.87	a	58.97
1986	44.13		47.50		58.77		59.37		66.65		76.57		74.48		85.71		69.13		66.42		53.54	b	41.13	a	61.95
1987	41.84		49.50		53.81		64.97		69.52		76.57		76.35		81.81		77.97		70.94		53.97		42.61		63.32
1988	40.94		50.66		55.39		60.73		65.61		72.70		80.52		80.45		75.37		67.90		52.37		45.39		62.33
1989	47.16		37.82		50.45		64.70		67.35		75.83		75.35		75.55		79.07		63.26		54.03		45.33	a	61.33
1990	48.90		46.21		57.39		63.73		65.48		72.00		83.03		81.39		77.27		60.90		55.10		39.67	a	62.59
1991	42.94		53.61		52.48		57.60		61.58		67.83		81.42		80.52		79.20		66.39		51.37		46.23		61.76
1992	48.37	a	51.41		60.97		62.73		74.65		78.70		81.35		82.42		73.63		64.10		51.27		42.65		64.35
1993	36.23		42.43		50.94		57.23		69.52		69.30		70.61		77.45		78.07		67.45		46.70		44.27	a	59.18
1994	47.94		42.64		57.23		61.00		68.55		70.97		80.90		79.90		76.50		63.35		46.93		44.19		61.68
1995	41.81		51.64		54.52		58.33		68.87		70.93		78.90		76.61		75.10		61.45		55.43		43.87	a	61.46
1996	44.39		43.72		54.52		60.63		62.37	a	71.90		82.94		80.71		71.10		62.39		49.83	a	44.50	a	60.75
1997	42.28	b	49.33	a	-----	z	58.62	a	72.94		72.00		79.52		81.94		76.67		61.77		53.47		44.55		63.01	a
1998	44.43	a	50.07		54.68		61.37		62.39		71.30		77.65		79.03		79.07		63.39		52.97		45.45		61.82
1999	48.39		49.21		53.71		60.77		65.00		69.87		78.16		79.45		79.33		66.65		54.90	a	48.03	a	62.79
2000	44.72	b	48.54	a	54.26		64.87		66.70	a	77.38	a	78.13		79.39		74.20		64.83	b	47.69	a	41.34	b	61.84
2001	43.77	a	48.04		56.13		59.33		71.03		72.10	a	77.43	a	80.81		77.10		63.94		53.50		45.61		62.40
2002	46.00	b	51.64		52.39		60.90		65.74		74.55	a	81.84		81.65		77.33		64.87		54.32	b	44.97		63.02
2003	47.90		52.00		55.66	b	59.77		67.16		76.83		84.81		82.45		78.33		66.39		49.34	a	43.42		63.67
2004	39.39		47.90		60.87		66.43		67.52		75.40		83.87		81.03		71.97		64.47	a	54.17		46.90	b	63.33
2005	43.53	a	52.46		60.45		59.73		69.23		70.17		81.81		83.39		74.43		63.97		50.53		41.33	a	62.59
2006	48.60	a	48.22	a	53.73	a	62.73		70.48		75.40		82.42		80.77		76.50		63.19		51.28	a	42.23		62.96
2007	43.00		47.85	a	56.94		61.03		69.74		72.87		82.45		79.19		72.73		59.13	a	51.13		43.67	a	61.65
2008	40.00		49.76		51.35		54.87		66.32		68.05	j	79.39		79.71		75.07	c	62.07	c	52.37		41.61	c	59.32	a
2009	43.13		45.25		48.32		59.43		68.97		73.13		83.73	a	78.65		76.80		59.45		49.87		37.74		60.37
2010	44.26		50.96	a	55.32		58.10		62.25	c	67.93	a	78.10		78.52		71.57		63.68		49.17		41.90		60.15
2011	44.32		44.75		48.65		54.17		61.58		68.83		74.81		78.29		76.47		60.81		49.23		43.52		58.78
2012	44.23		46.00		48.94		59.27		65.55		68.07		75.55		81.13		75.83		62.42		50.57		44.48		60.17
2013	38.90		48.57		54.87		60.57		67.29		73.60		80.58		79.61		72.90		62.58		50.23		40.90		60.88
2014	44.52		42.21		54.48		60.93		69.48		70.50		81.13		83.35		76.90		65.68		49.17		44.42		61.90
2015	46.55		53.36		61.81		61.41	a	68.23		80.60		85.19		82.87		72.63		66.77		49.83		43.16		64.37
2016	41.81		51.93		54.03		67.07		69.29		75.43		76.84		82.94		71.83		59.45		54.53		38.97		62.01
2017	32.71		42.75	d	51.23		56.73		68.74		73.63		80.77		84.71		75.90		62.52		49.33		40.58		59.97
2018	45.77		46.46		52.55		59.97		70.16		73.03		84.52		81.16		73.33		64.55		51.40		44.77		62.31
2019	44.65		38.11		50.19		60.47		68.45		72.60		75.32		79.48		70.87		58.68		51.87		43.71		59.53
2020	46.10		50.17		52.74		62.20		67.55		70.47		78.35		81.03		75.23		64.06		50.93		45.52		62.03
2021	47.13		45.76	g	54.03		64.37		67.03		81.03		82.19		80.81		75.33		59.55		52.83		44.26		64.42	a
2022	41.77		47.29		55.57	a	54.53		61.90		71.79	a	81.77		84.55		78.43		70.45		45.87		38.45		61.03
2023	43.29		44.46		49.39		56.47		72.13		74.77		83.55		84.23		72.97		63.29		51.50		46.10		61.84
2024	37.97		48.34		55.35		62.88	f	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	47.22	i
Period of Record Statistics
MEAN	42.50		47.32		53.49		59.91		66.80		72.14		79.07		79.36		74.14		62.93		50.79		43.82		60.94
S.D.	4.51		3.42		3.33		3.10		3.12		3.32		3.37		3.17		3.19		2.94		2.89		2.86		1.48
SKEW	-0.92		-0.67		0.43		0.08		-0.07		0.45		-0.29		-0.06		-0.12		0.44		-0.51		-0.98		0.11
MAX	52.10		53.61		61.81		67.07		74.65		81.03		85.81		87.10		79.33		70.94		56.10		48.90		64.37
MIN	29.42		37.48		46.52		53.37		58.90		66.43		70.61		71.55		67.57		56.48		40.55		32.87		57.25
YRS	86		86		86		86		85		84		86		86		86		86		86		87		81