HILLSBORO, OR

Average of Minimum Temperature (Degrees Fahrenheit)

(353908)

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
1929	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	28.92	f	36.23		36.23	k
1930	18.13	a	36.59	a	35.80	a	41.20		41.29		42.37		45.57	a	45.23		45.03		36.19		33.85	c	31.30	d	37.71
1931	34.69	e	30.82		37.65		39.47		44.13		47.17	a	49.40	a	45.84		47.17		39.45		32.67		33.28	b	40.14
1932	31.81		33.45		38.90		39.97		42.58		47.87		46.42		49.45		49.21	b	43.85	e	38.96	c	30.14	b	41.05
1933	34.60	a	30.30	a	35.97		36.20		41.33	d	46.97		48.29		50.35		44.93		40.89	c	34.43	g	39.62	b	40.86	a
1934	37.29	n	33.96	c	39.76	b	43.71	b	37.50	a	41.00		50.61		50.03		46.27		42.81		40.93		34.58		41.92	a
1935	31.35		33.44	a	32.39		37.30		35.81		39.63		48.81		49.10		45.23		38.10		31.77		30.90		37.82
1936	35.30	a	27.14		32.39		39.86	a	46.13		54.10		51.58		50.77		44.33		39.16		28.10		36.27	a	40.43
1937	22.23		33.52	a	38.52		40.43		45.52		51.79	a	51.23		51.19		48.70		42.75	c	41.37		35.55		41.90
1938	32.61		33.75		36.13	a	40.20		46.03		48.87		50.35		47.37	a	49.10		41.94		33.80		32.13	a	41.02
1939	35.77		31.04	d	35.55		37.90		42.42		45.80		49.61		49.97		47.17		43.48		36.15	c	39.00	a	41.16
1940	33.16		38.97		41.39		40.53		46.03		46.83		51.42		51.26		50.90	a	46.68		34.90	a	35.81		43.16
1941	34.13	a	35.18		38.39		39.37		44.87		48.72	a	53.55		53.84		46.67		43.26		37.77		34.90		42.55
1942	27.94		33.86		32.61		39.40		43.81		46.30		52.45		51.23		45.37		41.77		36.47		36.10		40.61
1943	24.97		31.70	a	33.32		41.63		40.90		47.73		50.06		49.19		46.00		43.68		33.10		30.16		39.37
1944	30.19		32.56	b	33.19		38.80		41.61		46.30		48.74		47.79	b	47.07		44.13		34.10		29.10		39.47
1945	33.71		36.07		35.48		39.43		45.52		45.60		50.03		48.58		43.73		38.35		36.67		33.06		40.52
1946	33.06		33.29		36.45		37.80		44.87		47.77		50.68		48.29		46.50		39.13		32.97		34.87		40.47
1947	29.06		35.07		37.10		41.57		43.81		48.50		50.16		48.65		45.47		44.58		36.63		34.23		41.23
1948	29.45		32.45		34.74		38.27		44.55		52.40		50.90	a	51.81		45.47		40.17	a	35.48	a	30.70	a	40.53
1949	18.80	a	30.75		36.81		39.93	a	45.45		47.62	a	50.35		51.87	a	48.69	a	36.68		39.63		34.00		40.05
1950	21.83	a	32.11		36.76	b	37.27		40.40	a	50.03		50.90	a	51.77		46.83		43.19		37.80		40.50	a	40.78
1951	32.45		34.79		31.68		38.14	a	43.77		48.50		52.35		48.35		47.83		43.90	a	38.71	b	31.61		41.01
1952	29.97		34.03		35.68		38.67		43.61		48.64	b	51.63	a	51.13	a	46.96	b	43.30	a	28.97	a	34.27	a	40.57
1953	41.13	a	34.46		36.48	b	38.90		43.87	a	48.07		52.13		53.28	b	49.47		42.23		40.93		36.21	b	43.10
1954	32.29		33.96		32.15	d	37.83	a	43.45		46.00		49.03	a	51.07	b	47.13		39.47	a	42.03		34.03		40.70
1955	32.45		32.36		32.17	a	36.50		41.26		47.83		50.35		48.00		47.33		43.71		34.73		32.87		39.96
1956	34.55		29.79		37.13		41.57		47.35		47.37		53.16		53.58		48.97		43.34	b	34.43		34.54	c	42.15
1957	25.03		34.32		40.81		41.60		49.10		51.03		52.39		51.33	a	51.20		44.03		34.13		37.55		42.71
1958	36.87	a	42.54		36.03		40.80		49.35		55.73		57.65		55.55		50.43		43.90		38.48	c	38.64	c	45.50
1959	35.53	a	35.79		37.74		40.28	a	43.19		50.43		53.19		48.71		47.70		42.77	a	34.55	a	31.87	a	41.81
1960	29.23		33.55		35.74		40.20		44.06		49.57		52.23		52.68		48.33		43.83	a	38.37		32.03		41.65
1961	37.81		40.77	b	39.86	b	41.83		46.03		51.50		53.97		55.61		45.40		41.19		34.40		35.77	a	43.68
1962	30.94		34.44	a	35.55		41.30		43.48		47.40		49.39		51.87		48.00	b	42.48		39.53		34.40	a	41.57
1963	27.00		38.43		34.79	b	39.45	a	44.17	a	49.93		50.84		51.81		50.21	a	43.52		38.37		31.84		41.70
1964	35.97	a	30.86		34.48		35.13		39.06		47.37		50.77		48.58		42.47		38.20	a	32.86	a	32.84		39.05
1965	34.32		35.21		32.63	a	38.63		39.32		44.73		50.97		52.77		42.53		41.35		39.83		31.29		40.30
1966	34.30	a	32.54		36.00		38.87		40.71		46.27		50.94		47.68		47.57		39.10		39.33		38.35		40.97
1967	37.84		33.50		34.53	a	34.53		41.00		49.60		52.26		53.55		47.00	a	43.47	a	38.73		35.84		41.82
1968	34.77		39.17		39.45		36.53		43.97		48.97		51.23		51.94		47.87		41.45		39.37		33.32		42.34
1969	28.74		33.86		33.58		38.87		44.10	a	55.37		50.71		47.52		49.13		40.61		37.70		36.87		41.42
1970	36.00		37.00		36.74		37.00		41.65		49.10		50.16		49.23		44.83		38.68		38.10		34.94		41.12
1971	35.39		34.89		36.19		39.30		43.94		46.80		52.13		53.97		46.70		40.48		38.27		34.26		41.86
1972	32.60	a	35.59		40.42		36.80		45.71		49.73		54.55		52.77		45.90		39.32		39.00		28.32		41.73
1973	33.53	a	36.11	a	37.55		37.83		43.47	a	48.93		52.74		48.48		47.86	a	41.84		37.14	a	38.87		42.03
1974	32.00		36.29		38.39		41.23		43.55		50.03		52.45		52.55		47.97		38.10		38.10		37.42		42.34
1975	35.58		34.64		36.84		36.10		43.57	a	48.07		53.55		50.87		46.33		44.77		37.33		36.90		42.05
1976	35.35		33.25	a	34.68		38.67		43.52		46.27		50.90		53.00		49.17		41.29		35.97		32.48		41.21
1977	28.68	f	33.82		35.06		38.00		42.32		48.70		50.48		55.29		49.47		41.97		36.57		37.97		42.70	a
1978	37.61		39.32		38.97		40.87		43.20	a	50.79	a	53.55		53.23		49.47		40.84		30.20		28.45		42.21
1979	23.52		35.75		37.81		40.67		43.68		48.77		52.27	a	52.16		49.76	a	44.32		35.13		37.52		41.78
1980	28.16		34.86		37.29		40.93		44.26		47.93		51.81		47.26		45.27		39.13	a	39.70		36.19		41.07
1981	33.74		34.61		35.94		40.13		44.45		48.87		51.61		52.90		46.97		39.94		37.77		36.55		41.96
1982	31.74		34.14		34.65		35.69	a	42.20	a	51.03	a	52.03		52.03	a	48.27		40.15	d	33.93	a	33.77		40.80
1983	36.29		39.48	a	41.03	a	39.47		45.84		49.47		52.79	c	52.43	a	45.03		38.23		42.03		30.42		42.71
1984	33.81		34.71	a	39.27	e	39.07	a	41.68	c	47.93		49.75	c	49.10	a	45.72	a	39.97		37.62	a	29.90	a	40.71
1985	26.00		30.07		32.07	c	40.10	a	42.69	b	48.20		52.84		50.13	a	44.93		39.19		29.57		25.00		38.40
1986	34.94		36.29		40.52		38.57		44.48		52.07		50.55		53.65		47.27		41.61		39.07		32.61		42.63
1987	33.03		36.43		38.90		39.97		46.58		50.41	a	53.71		51.58		47.13		39.35		39.23		32.55		42.41
1988	32.42		33.29	a	35.71		41.03		43.70	a	49.34	a	52.32		49.84		44.67		46.10	b	40.33		32.43	c	41.77
1989	35.03	a	27.59	a	37.55		42.08	e	44.77		50.93		52.29		51.81		46.40		41.94		39.43		33.19		41.92
1990	36.00		33.29		37.35		41.97		44.27	a	51.00		53.73	a	54.29		51.50		40.84		38.13		26.60	a	42.41
1991	30.61		38.43		35.06		40.63		43.97		49.13		52.77		53.90		48.60		39.43	a	39.90	a	34.97	a	42.28
1992	36.17	a	39.38		38.90		43.75	b	45.10	a	52.79	b	55.97	b	51.29		46.20		43.90		39.13		32.81		43.78
1993	29.48		31.00		39.21	b	42.13		49.37	a	50.53		52.07	a	53.35		46.76	a	43.61		29.76	a	33.10		41.70
1994	37.16		31.82		38.16		41.82	b	46.90		48.45	a	53.13		52.48		49.97	a	38.29		33.66	a	35.67	a	42.29
1995	38.32		36.68		37.26		39.37		47.74		50.81	d	56.74		51.19		52.33		42.00	a	43.50		36.03		44.33
1996	35.52		32.59		38.03		43.47		45.62	b	50.37		56.77		52.71		47.60		42.68		37.83		36.17	a	43.28
1997	35.77		34.52	a	38.20	a	40.40		50.68		52.07	b	55.87	a	56.52		51.86	a	44.26		45.50		35.77		45.12
1998	39.00		40.48	a	42.39		43.62	a	50.47	a	55.52	a	60.97	a	57.00		52.87		46.32		45.50		35.16		47.44
1999	38.00	a	39.71		38.45		40.80		45.55	b	51.97	a	52.29	q	-----	z	-----	z	41.00	s	44.45	a	41.48		42.55	d
2000	33.80	a	36.84	d	40.64	c	47.39	b	49.92	f	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	39.67	h
2001	-----	z	-----	z	-----	z	-----	z	42.61	c	47.11	c	52.10	a	52.42		47.63		39.50	a	39.14	h	33.00	n	46.90	f
2002	33.65		34.04		33.00	a	39.38	f	44.48		51.18	b	54.80	k	53.07	q	48.21	p	39.55	b	37.24	a	36.45		38.70	d
2003	38.39		35.86		41.26		41.90	a	46.00		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	40.68	g
Period of Record Statistics
MEAN	32.57		34.56		36.70		39.73		44.02		48.92		51.84		51.23		47.43		41.55		37.11		34.17		41.60
S.D.	4.66		2.97		2.60		2.23		2.66		2.85		2.41		2.48		2.19		2.36		3.68		3.16		1.63
SKEW	-1.12		0.22		-0.04		0.28		-0.09		-0.34		0.80		-0.09		0.25		-0.05		-0.20		-0.32		0.56
MAX	41.13		42.54		42.39		47.39		50.68		55.73		60.97		57.00		52.87		46.68		45.50		41.48		47.44
MIN	18.13		27.14		31.68		34.53		35.81		39.63		45.57		45.23		42.47		36.19		28.10		25.00		37.71
YRS	71		73		73		72		73		72		70		70		70		71		70		72		66