HEADWORKS PORTLAND WTR B, OR

Average of Maximum Temperature (Degrees Fahrenheit)

(353770)

File last updated on April 20, 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
1899	-----	z	-----	z	-----	z	52.23		53.55		63.77		75.81		65.53	a	69.97		53.03		51.30	c	42.33	d	58.61	c
1900	43.73	a	43.08	c	53.93	a	57.45	a	60.20	a	69.93	a	73.29		65.84		62.70		54.03	a	47.32	b	43.42	e	56.24
1901	39.00		43.12	c	47.12	g	52.40		60.97	a	63.10		71.58		74.90		-----	z	60.40	a	49.46	b	41.89	d	55.68	b
1902	39.29	c	43.00		48.14	c	-----	z	-----	z	68.03		71.48		74.26		66.34	a	60.55		44.86	b	40.54	e	55.65	b
1903	41.76	b	40.74	a	-----	z	-----	z	-----	z	69.67		69.61		69.81		64.13		-----	z	-----	z	43.40	a	57.02	e
1904	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	43.12	e	43.12	k
1905	-----	z	-----	z	-----	z	60.97		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	60.97	k
1906	-----	z	-----	z	-----	z	-----	z	63.03		69.87		86.03		82.58		72.43		61.55		50.43		46.48		66.55	d
1907	37.71		49.41	f	49.19		60.73		69.74		70.90		79.00		72.84		70.90		65.19		53.77		45.43	a	61.40	a
1908	45.19		45.48		50.81		62.00		58.42		69.10		82.13		77.42		71.90		56.65		53.90		41.84		59.57
1909	37.03		43.75		53.48		57.20		61.97		71.53		71.19		75.84		71.70		61.00		47.73		38.65		57.59
1910	39.42		40.71		60.03		61.80		68.71		70.10	a	80.16		74.39		69.17		61.00	b	48.39	b	45.61		59.96
1911	40.47	a	45.59	a	57.62	b	58.59	a	61.27	a	63.46	b	81.19		74.58		57.23		55.29		45.40		40.00		56.72
1912	39.31	b	44.93		46.03		50.70		64.48		74.63		75.68		65.20	a	69.00		60.48	d	52.45	a	44.90		57.32
1913	39.60	a	45.64		49.55		60.89	b	-----	z	72.57		75.71		80.58		72.87		61.87		50.62	a	43.84		59.43	a
1914	45.39		47.11		57.77		61.07	b	68.52	b	67.00	c	77.39		77.65		66.50		65.61		51.28	a	40.94		60.52
1915	43.65		49.39		60.19		65.10		63.52		70.23		74.55		82.06		71.87		62.13		47.50		43.71		61.16
1916	33.84		47.24		50.48		61.17		61.58		71.37		72.32		78.16		70.57		62.23		46.57		38.61		57.84
1917	40.23	a	44.82		46.03		52.45	a	59.32		71.73		82.58		83.81		70.66	a	66.52		55.33		49.32		60.23
1918	46.90		44.89		52.55		62.72	a	63.74		79.87		79.00		75.74		78.30		62.35		51.20		44.58		61.82
1919	45.61		44.00		54.06		61.20		66.94		71.63		83.03	a	81.94		72.43		57.74		47.93		36.68		60.27
1920	44.32		54.10		52.94		54.90		66.16		72.67		79.39		80.39		67.03		-----	z	52.13		46.77		60.98	a
1921	44.03		48.79		55.77		62.28	a	69.58		73.73		78.35		80.26		72.52	a	66.90		56.07		43.20	a	62.62
1922	39.06		44.29		47.70	a	56.20		68.23		78.13		84.19		77.71		74.27		61.19		48.40		37.73	a	59.76
1923	44.17	a	42.71		53.29		65.07		63.67	a	71.43		78.42		82.03		75.77		64.90	a	56.73		45.65		61.99
1924	43.48		52.57	a	53.45		63.50		73.58		76.10		80.52		76.23	a	74.07		60.73	a	48.97		40.27	a	61.96
1925	46.19		49.93		54.52		62.50		72.53	a	73.80		81.68		78.29		71.97		66.87		50.59	a	49.29		63.18
1926	47.16		53.46		64.61		71.69	a	65.75	c	73.66	a	82.97	a	77.61		65.55	a	61.45	b	55.17		45.71		63.73
1927	43.10	a	51.21		54.48		61.34	a	62.39		73.37		79.43	a	79.19		64.03		61.78	d	52.07	a	40.76	b	60.26
1928	40.94		48.00	c	54.10		55.66	a	72.69	e	66.18	b	77.31	e	77.60	f	68.40		63.23		54.28	a	43.73	a	58.59	a
1929	40.67	a	43.61		53.90		57.57		70.03		72.33		83.61		83.32		76.57		67.77		53.47		47.90		62.56
1930	35.73	a	50.04		61.45		65.87		64.00	b	73.07		79.45		82.67	a	73.31	a	61.74		55.21	a	45.71		62.35
1931	47.74		50.89	a	54.29		64.57		72.97		71.77		81.10		81.26		69.17		63.26		48.87		42.71		62.38
1932	41.52		44.93		51.13		59.83		65.23		76.07		75.45		76.52		78.60		65.39		53.33		42.32		60.86
1933	41.81		40.96		52.60	a	61.90		59.63	a	69.40		79.90		79.94		65.77		65.03		54.90		49.19		60.09
1934	49.68		56.54		64.97		69.17		69.39		71.47		74.48		80.10		72.73		65.76	b	52.63		46.16		64.42
1935	40.73	a	51.82		47.13	a	59.70		68.29		73.07		78.26		79.03		78.10		60.03	a	48.50		46.77		60.95
1936	46.47	a	40.48		51.45		65.30		71.47	a	72.13		76.35		78.68		74.41	a	68.81		55.87		45.55		62.25
1937	33.68		41.93		53.10		54.60		67.81		73.47		78.87		75.94		72.10		65.97		52.10		47.58		59.76
1938	45.23		46.96		51.06		61.97		69.35		74.23		82.94		76.23		77.47		64.16		48.00	a	45.68		61.94
1939	44.81		43.36		56.00		64.80		69.58		67.30		78.97		81.68		73.97		60.90		53.93		46.52		61.82
1940	43.63	a	49.48		57.23		62.20		74.23		78.27		77.71		81.23		72.87		63.90		49.03		47.03		63.07
1941	47.77		54.68		63.68		63.80		66.90		69.57		83.81		76.42		67.00		60.45		53.67		45.13		62.74
1942	41.87		46.61		54.58		61.73		63.35		68.53		78.77		79.45		76.47		65.00		48.83		43.61		60.73
1943	38.81		50.86		52.03		63.93		63.39		69.13		79.70	a	75.23		78.90		61.68		54.50		46.45		61.22
1944	45.32		46.86		54.19		58.83		68.06		70.33		79.48		79.13		76.93		67.65		50.07		44.48		61.78
1945	46.71		48.14		48.87		55.70		67.74		72.70		82.48		79.32		70.33		62.90		47.23		44.74		60.57
1946	43.58		46.82		51.19		59.70		68.71		67.87		78.29		78.06		69.20		55.35		47.33		44.42		59.21
1947	38.29		52.00		57.71		60.60		71.10		67.24	a	74.29		74.03		73.59	a	57.65		49.33		45.35		60.10
1948	45.35		43.66		49.55		54.17		64.23		73.20		74.42		71.35		70.37		59.65		45.33		39.03		57.53
1949	34.58		41.71		51.67	a	62.73		69.42		72.80		75.71		76.37	a	73.83		55.42		58.10		41.94		59.52
1950	31.90		42.36		47.77		55.87		64.71		70.47		78.39		81.39		73.27		56.94		48.87		48.97		58.41
1951	41.61		46.96		47.13	a	65.63		66.67	a	76.77		79.77	a	78.61		76.47		54.35		50.07		39.73	a	60.31
1952	38.16		44.68	a	49.10		63.77		68.45		68.27		82.23		80.42		78.90		71.45		50.17		42.61		61.52
1953	48.61		48.93		51.55		57.63		62.63	a	64.93		78.87		75.94		74.50		64.97		52.97		46.74		60.69
1954	41.16		49.54		52.58		58.77		68.60	a	65.53		73.20	a	70.90	a	69.87		62.31	b	54.77		45.63	a	59.40
1955	43.00		45.00		46.39		52.45	a	62.30	a	69.57		72.00	c	77.84		71.97	a	59.63	a	44.33		42.23		57.22
1956	41.97	a	38.45		48.10	a	62.62	a	68.97		68.03		80.70	a	74.97		72.37		57.23		51.33		45.23		59.16
1957	36.87		46.14		51.16		60.37		66.68		70.80		76.71		75.42		79.77		60.17	a	53.10		47.77		60.41
1958	48.10		53.96	a	52.97		58.77		74.23		73.77		85.06		84.32		72.83		67.32		51.63		50.68		64.47
1959	45.03		46.07		52.81		59.50		63.65		70.40		80.81		76.06		66.93		62.61		53.37		47.26		60.37
1960	40.32		47.41		52.39		58.40		61.19		74.53		82.71		73.19		73.47		63.00		50.83		47.32		60.40
1961	50.35		49.14		51.19		56.87		64.26		79.23		82.55		83.68		69.83	a	61.55		50.69	a	44.77		62.01
1962	44.06		49.39		48.94		61.69	a	58.65		73.00		78.40	a	76.26		74.27		63.71		53.55	a	49.00		60.91
1963	40.94		54.96		52.65		54.47		67.35		66.59	a	72.32		76.16		76.37		63.52		51.21	a	47.71		60.35
1964	45.00		50.17		49.87		55.17		63.23		67.63		76.42		73.35		69.00		65.13	a	48.33		42.00		58.78
1965	44.97	a	47.71		58.03		61.70		62.65		72.72	a	81.06		77.71		71.41	a	67.13		54.13		43.50	a	61.89
1966	44.32		47.79		52.73	a	60.20		68.47	a	70.87		75.47	a	78.23		73.40		62.90		52.13		46.23		61.06
1967	45.06		50.96		49.13		54.77		65.97		74.67		79.71		86.52		77.93		62.63	a	53.70		42.19		61.94
1968	43.68		55.52		56.26		56.93		64.94		70.97		78.77		73.10		70.93		59.84		52.17		41.35		60.37
1969	37.10		44.86		55.77		57.70		70.35		70.23		73.90		72.19		70.33		60.45		53.30		46.84		59.42
1970	45.77		54.11		53.68		53.37		67.39		75.30		78.87		80.10		68.30		60.61		51.07		43.35		60.99
1971	44.16		47.79		48.03		59.20		68.42		66.53		79.00		80.19		68.73		59.03		49.93		41.97		59.42
1972	41.81		47.72		54.58		53.93	a	69.90		71.67		80.32		81.77		69.10		62.32		52.63		40.29		60.50
1973	42.81		52.96	a	52.03		59.97		69.06		70.43		80.61		74.58		73.07		59.61		45.70		47.19		60.67
1974	41.90		45.96		53.45		56.73		61.58		73.33		75.48		77.58		79.70		66.90		52.93		47.39		61.08
1975	45.77		46.39		49.45		54.30		65.90	a	68.43		76.84		71.52		78.20		57.13		49.27		47.47	a	59.22
1976	47.13		47.45		50.65		57.87		67.84		68.37		76.97		72.70	a	73.53		64.87		57.40		49.13		61.16
1977	47.10		54.00		50.48		64.13		60.26		75.17		76.84		82.13	a	67.67		62.87	a	48.67		46.87		61.35
1978	46.11	c	51.07		57.74		57.87		63.39		74.20		77.39		75.10		67.00		67.77		48.07		41.65		60.61
1979	37.32		44.82		57.39		58.00		68.61		73.86	b	79.06		75.61		76.47		64.29		51.47		49.61		61.38
1980	41.10		49.07	a	50.71		63.89	b	63.74		66.80		78.52		74.61		74.14	a	67.10		53.83		51.07	a	61.21
1981	52.13	a	52.64		56.68		60.53		64.84		69.27		76.72	b	83.45		76.13		62.53	a	56.37		46.68		63.16
1982	42.00		47.68		53.27	a	58.11	b	66.55	b	74.90		75.83	a	78.33	a	71.97	a	63.31	b	49.31	a	45.39		60.55
1983	50.77		52.00		55.60	a	62.23		71.46	c	68.62	a	72.66	b	77.55		70.23		63.55		51.13		38.61		61.20
1984	48.48		52.59		57.10		55.23		64.23		69.60		81.87		80.42		73.07	a	58.29		50.03	a	41.55		61.04
1985	46.32		46.44	a	52.06		61.53		66.77		75.31	a	85.57	a	78.97	a	68.17		60.90		41.57		44.10		60.64
1986	49.61		48.46		61.13		58.69	a	66.65		76.83		74.17	a	83.84		67.63		67.03	b	52.53		47.65		62.85
1987	45.65	e	51.12	d	54.39		66.93		69.23	a	78.27		77.00	a	84.52		-----	z	72.94		54.43		42.74		63.38	a
1988	43.97		54.00		54.87		60.17	a	64.96	d	72.86	a	80.42		82.10		77.96	b	68.94		50.24	a	47.81		63.19
1989	45.42		41.82		50.62	b	65.23		67.74		75.14	b	75.62	b	74.81		78.63		62.87		53.37		47.68		61.58
1990	47.19		46.14		56.66	b	63.69	d	64.03	a	71.93	b	84.00	a	82.35		78.70		60.43	a	52.20		39.39		62.23
1991	46.48		57.14		52.94		57.31	a	60.17	a	67.90		83.30	a	81.47	a	81.77		67.93	a	52.00		48.81		63.10
1992	49.90		56.66		64.23		63.20		76.87	a	78.37		82.00		84.20	a	74.72	a	64.13		52.03		43.00	c	65.78
1993	41.63	a	48.54		55.73	a	58.73		72.10	b	71.34	a	70.77	a	79.58		80.93		69.58		49.97		47.26		62.18
1994	49.97		47.61		60.26		61.80		70.67	a	71.30		84.39		82.07	a	80.07		64.27	a	46.10		44.42		63.58
1995	47.42		54.48	a	56.42		59.52	a	70.37	a	72.43		81.06		78.29		75.20		61.81		55.80		47.55	b	63.36
1996	45.26		49.71	a	56.10		61.24	a	63.45		74.63		86.52		85.29		72.53		63.19		49.78	c	45.45		62.76
1997	45.45		50.68		51.97	a	58.32	b	71.83	a	-----	z	79.11	c	82.86	c	75.70	c	60.62	b	56.34	a	46.00		61.72	a
1998	47.21	c	51.71		54.97		61.77		61.06		71.83	a	80.03		82.65		78.77		63.23		51.17		43.37	a	62.31
1999	46.97		47.07	a	51.39		60.17		63.32		68.40		77.81		79.06		78.50		66.16		54.80		48.73	a	61.87
2000	44.26		50.34		53.73	a	63.87		63.10		74.17		77.07	a	77.32		71.27		61.11	c	48.21	a	46.33	a	60.90
2001	47.74		49.61		53.65		56.17		70.58		68.70		73.68		77.10		73.57		60.00		52.33		44.84		60.66
2002	43.26		50.32		49.55		58.77		62.87	a	71.93		78.90		78.48		74.70		61.13		55.87		47.03		61.07
2003	49.97		50.11		52.61		56.67		65.37	a	75.57		80.79	b	80.46	c	75.59	a	63.58		48.47		45.10		62.02
2004	44.03		48.90		59.10		64.67		64.77	a	71.93		81.10		78.58		68.13		61.58		51.10	a	46.84		61.73
2005	46.87		53.39		58.58		58.23		66.28	b	66.97		78.67	a	80.10		70.50		61.00		49.97		44.19		61.23
2006	46.90		47.33	a	51.13	a	60.41	a	68.48		72.59	a	79.87		78.76	b	74.03		60.63	a	49.28	a	46.55		61.33
2007	43.94		49.25		55.90		58.71	b	65.64	f	68.92	f	77.79	l	76.00	g	68.67	c	56.57	c	47.97	a	39.06	m	54.43	e
2008	39.93	b	48.71	a	48.31	e	52.60	e	64.52	h	67.29	f	77.92	g	76.20	f	73.00	d	58.29		52.20		39.87		51.61	d
2009	44.00		47.89		45.74		56.10		65.68		68.57		81.03		75.50	a	72.87		57.77	a	49.13		40.87		58.76
2010	48.20	a	51.96	b	53.26		55.17		58.16		63.60		74.26		75.00		68.37		60.45		47.20		44.23		58.32
2011	44.26		43.57		47.06		50.37		57.39		64.47		70.94		74.61		73.87		58.23		48.29	b	43.32		56.36
2012	44.94		45.97		46.84		56.33		63.39		64.23		72.39		78.13		74.34	a	59.94		50.53		42.13		58.26
2013	40.74		45.71		53.16		56.27		64.16		70.13		76.87		77.26		68.83		60.58		50.17		39.16		58.59
2014	46.87		42.32		54.13		58.00		65.97		66.83	a	77.94		79.10		74.20		63.48		48.87		46.77		60.37
2015	50.19		53.46		59.74		59.33		65.06		77.13		82.13	a	79.84		69.97		65.65		48.60		44.68		62.98
2016	45.19		52.69		53.10		63.67		66.58		70.97		72.45		78.81		68.00		57.45		53.77		39.19		60.16
2017	38.94		44.39		49.74		54.90		65.81		70.67		78.03		83.39		72.67		59.13		48.63		43.26		59.13
2018	46.90		43.89		51.13		58.17		67.71		69.07		83.35		79.13		69.23		61.52		51.90	a	44.42		60.53
2019	45.77		38.07		52.29		56.23		65.16		67.29	b	72.39		76.35		64.77		55.48		51.17		45.45		57.54
2020	43.65		47.03		49.26		59.17		63.94		65.13		74.61		75.87		72.13		59.87		48.13		46.06		58.74
2021	46.26		41.18		50.71		60.97		63.65		75.57		77.77		76.81		71.63		55.94		50.77		41.90		59.43
2022	45.26		46.71		51.61		50.87		57.45		67.20		78.35		80.58		74.77		65.97		45.67		40.35		58.73
2023	44.19		42.71		46.26		52.57		67.71		70.80		78.68		79.61		68.60		60.42		50.30		47.52		59.11
2024	41.77		46.82	a	52.06		56.11	l	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	46.89	i
Period of Record Statistics
MEAN	43.72		47.86		53.15		59.39		65.94		71.14		78.32		78.05		72.38		62.15		50.98		44.53		60.75
S.D.	3.90		4.12		4.10		4.00		4.06		3.62		3.69		3.93		4.24		3.72		3.05		3.04		1.79
SKEW	-0.54		0.05		0.63		0.04		-0.11		0.02		-0.17		-0.67		-0.28		0.08		-0.12		-0.31		-0.19
MAX	52.13		57.14		64.97		71.69		76.87		79.87		86.52		86.52		81.77		72.94		58.10		51.07		65.78
MIN	31.90		38.07		45.74		50.37		53.55		63.10		69.61		65.20		57.23		53.03		41.57		36.68		56.24
YRS	122		121		120		121		118		120		121		120		121		121		122		123		110