BONNEVILLE DAM, OR

Average of Average Temperature (Degrees Fahrenheit)

(350897)

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
1937	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	47.83	o	42.98	e	42.98	k
1938	40.53	a	41.06	b	45.16		55.00	a	57.56	f	66.63	g	72.12	a	67.10	b	67.48	a	57.05	a	43.12	a	42.21	e	53.08	b
1939	41.83	h	38.56	a	47.34		54.69	a	59.61		60.37		68.90		70.55		64.93	a	55.72	b	47.10	a	43.76	b	55.59	a
1940	37.36	b	43.27	c	49.56		53.93	a	61.34		67.23		69.05		71.13		65.12		57.63	d	41.94	c	39.73	e	54.77
1941	38.05		44.13	a	52.10	a	55.38	a	58.08	a	63.07		72.03		67.76		60.57		54.56		48.23		41.81	d	54.65
1942	30.17	a	40.95		45.92		53.75		56.24		60.27		70.68		70.05		65.28		57.12	a	43.08		40.28	a	52.82
1943	30.85		40.72	a	43.94		53.48		54.85		60.10	a	67.32		65.82		66.72		55.37		44.75		38.48		51.87
1944	35.83	a	39.88		43.79		50.52		56.24		60.08		67.69		66.81		64.45		58.74		43.75		36.02		51.98
1945	40.59	b	41.83	b	42.97		49.05		58.12	a	61.52	a	68.75	a	67.58		60.25		54.47		43.41	a	36.86	b	52.12
1946	39.73	c	41.09		45.06		50.60	a	58.84	b	59.70		67.53		67.53		61.83	a	50.13	a	41.70	c	41.12	b	52.07
1947	35.75	c	43.04		48.55	a	52.60		60.40	a	60.03	a	65.81		64.95		63.27		53.67	a	45.12	a	41.23	c	52.87
1948	38.02	a	37.59	a	43.20	a	48.15		55.32		64.64	a	64.84		65.05		61.15		53.15		43.22		34.90		50.77
1949	25.07	a	36.93		44.32		52.87		58.61		61.15		65.13		66.19		63.78		48.31		49.02		40.47		50.99
1950	24.65	a	38.44	d	42.50		48.37		54.16		61.55		65.95		68.94		62.92		51.81		44.27		42.08		50.47
1951	37.32		39.27		40.23		53.35		55.76		61.95		68.40		65.44		64.63		53.48		44.33		37.68		51.82
1952	31.84		39.50		42.95	a	52.15		57.18		59.55		68.65		67.92		65.47		60.89		40.63		38.15		52.07
1953	46.43	a	43.64		45.48		49.52		53.98		58.45		67.70	a	66.68		63.98		55.26		49.52		43.40		53.67
1954	36.39		40.43		43.18		49.95		56.97		58.57		62.69		63.82		62.03		52.16		49.52		38.03		51.14
1955	37.85		39.27		39.85		45.62		53.44		60.83		62.02		65.97	a	61.76	a	53.90		38.74	a	37.03		49.69
1956	36.95		32.59		43.24		51.95	b	59.44		59.62		68.77		66.05	b	62.38		52.31		42.18		40.45		51.33
1957	26.29		38.54		43.73		51.38		59.16		62.70		65.79		65.03		67.07		52.45		43.93		41.98		51.50
1958	41.16		46.29		43.84		50.22		61.27		65.53		71.65		70.92		62.69	a	56.16		44.95		41.60	b	54.69
1959	38.24		39.66		45.08		51.68		54.66		62.30		68.18		65.98		59.80		53.65		42.82		39.66		51.81
1960	31.71		41.12		43.02		49.92		54.09	d	62.48		69.37		65.11		61.90		54.77		45.52		37.08		51.34
1961	40.53		44.61		45.21		49.68		55.48		66.00		69.68		71.24		60.32		52.56		40.96	c	39.50		52.98
1962	37.89		40.91	a	42.35		53.02	a	52.08	a	61.80		66.19		66.24		63.77		54.61		47.19	a	41.60		52.30
1963	34.19		42.91		45.12	a	47.53	a	57.06		60.58		63.29		66.95		67.10		55.66		46.78		37.50		52.06
1964	41.40		41.90		43.80	a	47.98		54.02		59.80		66.06		64.50		60.45		55.28	a	42.63		36.40		51.19
1965	39.44		42.77		46.42		51.93		54.19		60.08		68.73		66.58	k	59.98		57.24		48.59	a	38.35		51.61	a
1966	38.44	g	40.20		43.76		51.90		55.34	b	61.53	a	65.32		67.10		63.95		53.58		47.12		41.61		53.76	a
1967	43.55		44.11		43.70	a	47.71	b	56.92		65.12		70.10		73.24		67.72	a	55.40		46.78		39.02		54.45
1968	37.89		45.62		48.69		49.35		56.42		61.85		67.98	a	64.39		62.52		52.35		45.85		36.74		52.47
1969	29.84		38.52		46.52		50.72		58.60		65.40		65.79		64.61		62.73		52.21		47.23		40.26		51.87
1970	36.61		44.93		45.55		47.15		56.11		64.55		67.47		67.15		59.43	a	52.34		44.90		38.35		52.05
1971	39.92		42.95		41.10		48.33		56.24		58.00		66.76		69.23	a	60.07		51.02		44.07		38.58		51.35
1972	38.06		40.32	a	47.29		45.98		58.02		60.95		68.32		69.31		59.00		52.72	a	46.43		33.82	a	51.69
1973	36.12	a	42.18		45.27	a	50.97		57.77		61.93		67.40		64.68		62.58		53.77		42.95		43.02		52.39
1974	34.85	a	42.50		45.06		49.72		54.13		62.77		65.34		67.19		66.15		55.98		46.33		42.69		52.73
1975	39.02		38.30		42.68		45.73		55.98		60.70		67.21		64.15		66.60		53.71		45.47	a	41.65		51.77
1976	41.58	a	40.86	a	43.13		48.90		56.81		59.03	a	66.20	a	64.15		64.17		55.19		48.27		41.18		52.45
1977	33.37		43.05		44.45	b	52.80		52.89		64.00		66.04	c	71.68		59.88		54.89		43.04	b	41.73		52.32
1978	37.67	a	42.86		48.42	a	50.45		55.06		64.95		67.93	b	67.27	a	60.84	a	56.73		41.33	a	37.43	a	52.58
1979	25.90		38.35	a	48.05	b	50.77		58.58		63.60		68.55		66.80	c	65.60		56.84		43.25		42.03		52.36
1980	32.71	e	39.22	b	44.71		53.12		56.68		59.38		67.74		65.24		62.63		55.76	d	47.15		42.65		52.25
1981	42.71		42.54	a	48.97		50.80		56.61		60.37		65.83	a	70.81		63.25		53.11		48.35		41.61		53.75
1982	39.16	b	41.69	a	45.90		48.28	a	56.50		64.70		66.16		67.45		62.67	a	53.50		42.93		40.48	a	52.45
1983	42.57	b	43.80		49.21		51.83	a	59.07	a	60.88	a	64.94		67.45	a	60.67	d	54.39	c	47.95		32.52	b	52.94
1984	39.21		42.41		48.45		49.10		54.37		59.97	a	67.77		67.92		61.05		51.44		44.61	c	37.23		51.96
1985	34.63	a	37.85	b	44.54	c	52.19	c	57.43	d	63.15	f	72.17	b	66.94	d	59.07	g	53.82	f	35.10	e	29.84	c	47.85	c
1986	39.73	g	41.81	b	50.31	b	50.40	f	56.74	f	65.64	b	64.62	b	71.67	d	60.09	b	57.69		48.11	c	38.08	e	55.34	c
1987	37.43	d	44.32	c	47.22	h	53.38	f	59.65	e	64.97	a	66.95	c	68.19	e	66.13	c	60.05	b	49.50	a	38.86	b	55.60	b
1988	36.66	c	43.46	a	46.95	c	51.69	f	56.63	d	62.68		68.43	a	68.65		64.26	a	60.30	a	47.55	a	41.07	b	54.24	a
1989	42.27		32.62		44.02	a	54.57	a	57.23	a	65.11	b	66.02	a	66.66		66.05		55.53		49.12	a	40.93	a	53.34
1990	43.80	a	40.45		48.40		54.45	a	56.57	a	62.66	a	70.63		70.55		66.95		53.62	a	48.64	b	34.72	a	54.29
1991	37.27		47.09	a	44.62	a	50.05		54.02	a	59.06	c	69.60	a	69.61		67.45		56.77	a	46.57		42.00	a	53.68
1992	43.16	b	46.36		51.78	a	54.14	a	62.98	a	67.63		70.52		70.50	a	63.47		56.97		46.45		38.61		56.05
1993	32.34		37.11		43.76		50.47		60.22	a	61.23		63.34		67.43	a	66.33		59.24		40.82		40.43	a	51.89
1994	43.60	a	38.09		48.48		53.04	d	59.13	a	61.15	c	70.10		69.79		66.64	a	55.72	d	42.12	a	40.63	a	54.04
1995	38.63		44.78	a	47.02		50.87	c	59.76	d	61.41	b	69.08	a	66.02		66.50		54.59	b	50.73		40.05	a	54.12
1996	39.50		37.30	a	46.00		52.19	a	53.79	b	61.34	a	70.34		67.15	e	60.55		54.52		45.03	a	39.30	a	52.25
1997	37.78	b	42.46	b	-----	z	50.30	b	61.06		62.20		68.54	f	70.23	c	65.75		54.00	a	47.55	a	40.19		53.15	b
1998	40.10	a	44.38		47.44		51.75		55.68	a	62.32	b	68.55	a	67.98	a	66.26	a	54.52	b	48.17	a	40.78	b	53.99
1999	43.16		42.91		45.85		49.93		54.35		60.75		66.12	b	68.88	a	65.00	d	56.02		49.24	a	43.16	b	53.78
2000	39.23	c	42.34	a	45.26		53.75		56.84	c	64.72	a	66.70	a	67.46	c	63.91	c	55.43	b	41.43	c	37.43	b	52.88
2001	39.13	a	40.77		48.02	d	49.17	a	58.35		60.66	b	66.36	b	68.63		64.31	c	54.21		47.52		40.85	a	53.17
2002	40.81	b	43.61		44.03		51.40	a	55.67	b	63.40	a	69.27		68.10	a	64.27		54.73		47.25	b	40.27		53.57
2003	43.19		43.52		48.33	b	50.57		56.76		65.18		70.45		69.45		66.03		57.61		43.43	c	39.74		54.52
2004	35.05	a	42.74	b	50.57	c	55.27		58.34		64.75		70.95	c	70.36	b	61.82	b	55.56	f	47.43		42.19	e	54.50	a
2005	38.93	a	43.18		50.12	b	51.58		59.92		61.29	b	69.50	d	70.13	a	61.00	d	56.15	e	44.73	b	36.57	b	53.59
2006	44.48	d	40.67	b	45.48	b	52.78	c	58.97	b	65.59	c	69.05	c	68.15	d	64.09	c	54.25	c	45.81	a	37.64	c	53.91
2007	37.28	a	42.68	c	47.86	f	51.59	a	58.22	a	63.17	c	71.54	g	67.47	b	61.95		51.89	d	43.89	c	38.75	a	51.69	b
2008	35.88	a	42.52	a	43.53	b	45.81	d	56.52	b	59.23	j	67.89		68.58		63.70	c	53.32	c	47.62		36.25	c	51.06	a
2009	37.71		39.18		41.98		49.50		57.05		64.08		70.00	b	68.63		65.58		51.97		45.03		33.66		52.03
2010	40.79		44.57	a	46.98		49.70		53.23	c	59.29	a	66.89		67.94		62.65		55.68		43.90		38.56		52.52
2011	39.52		38.84		43.16		46.85		52.81		60.20		64.82		68.16		65.52		54.69		43.43		38.34		51.36
2012	38.37		40.79		42.60		51.07		55.87		59.23		66.10		70.02		64.57		54.92		46.47		40.37		52.53
2013	35.19		42.34		46.32		51.43		57.42		63.15		68.98		69.60		64.38		52.92		44.73		35.84		52.69
2014	39.55		37.45		46.06		51.82		59.19		61.22		70.02		71.42		66.13		58.11		44.12		40.92		53.83
2015	41.60		47.05		51.31		51.62	a	58.84		68.53		73.13		71.19		61.57		58.74		44.38		39.26		55.60
2016	38.29		45.97		47.32		56.87		59.37		63.93		66.90		69.98		61.43		53.94		49.85		35.11		54.08
2017	29.32		38.41	e	45.06		49.38		58.45		63.53		68.37		71.61		65.40		53.61		44.38		36.84		52.03
2018	41.76		41.05		44.68		50.75		60.37		62.53		71.52		69.94		62.30		55.95		45.93		40.77		53.96
2019	40.24		33.86		41.87		52.03		58.61		61.45		65.18		68.84		62.75		50.37		45.27		39.66		51.68
2020	41.98		43.07		44.48		52.18		57.74		61.57		67.24		69.06		65.42		55.15		45.17		40.61		53.64
2021	42.18		40.57	g	45.10		52.32		57.50		68.87		70.53		69.56		63.48		52.48		47.85		39.56		55.40	a
2022	36.87		40.64		47.42	a	46.43		53.55		62.28	a	69.95		72.08		67.00		60.35		40.58		33.97		52.59
2023	39.35		38.62		42.37		48.22		61.32		63.57		71.16		72.39		63.20		55.53		45.63		42.34		53.64
2024	34.37		42.03		47.05		50.97	k	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	41.15	i
Period of Record Statistics
MEAN	37.70		41.30		45.56		50.89		57.05		62.29		67.90		68.12		63.61		54.82		45.25		39.28		52.71
S.D.	4.45		2.91		2.62		2.41		2.33		2.39		2.31		2.23		2.30		2.39		2.79		2.70		1.22
SKEW	-0.97		-0.56		0.39		-0.13		0.06		0.60		-0.11		0.06		-0.09		0.26		-0.57		-0.85		0.33
MAX	46.43		47.09		52.10		56.87		62.98		68.87		73.13		73.24		67.72		60.89		50.73		43.76		56.05
MIN	24.65		32.59		39.85		45.62		52.08		58.00		62.02		63.82		59.00		48.31		35.10		29.84		49.69
YRS	84		86		84		83		84		83		84		85		85		84		86		87		73