HILLSBORO, OR

Total of Precipitation (Inches)

(353908)

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
1929	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	0.57		8.16		8.73	j
1930	3.95		4.33		1.24	a	2.69		2.33		0.65		0.03		0.04		1.58		1.39		2.28	a	3.19		23.70
1931	4.42	c	1.94		6.13		1.76		0.77		3.09		0.00		0.00		2.66		4.18	a	6.00		9.41		40.36
1932	5.48		2.32		4.71		2.78		1.65		0.18		0.63		0.35		0.06		2.51	b	8.92		7.41		37.00
1933	5.38		2.89		5.11		0.23		3.18	a	1.86		0.00		0.88		2.30		2.32	a	1.83		13.95	b	39.93
1934	5.41	a	1.77		2.30	b	0.71	b	1.24		0.83		0.26		0.30		1.25		5.14		11.65	a	8.74		39.60
1935	4.47		3.19		5.44		1.95		0.45		0.39		0.41		0.10		1.34		2.20		1.98		5.63		27.55
1936	9.29		5.86		2.33		1.51		3.63		1.83		0.71		0.04		0.62		0.39		0.40		7.75		34.36
1937	4.76		6.64		3.45		5.58		0.82		3.13		0.14		0.94		1.51		1.76		9.07		13.33		51.13
1938	4.44		5.79		7.12		1.88		0.52		0.40		0.25		0.25		1.31		3.46		3.99		3.59		33.00
1939	4.37		4.73		2.16		0.33		0.77		1.08		0.20		1.20		0.44		2.06		1.80		9.61	a	28.75
1940	3.84		10.21		3.55		2.21		1.68		0.00		0.99		0.09		2.74		4.24		4.12		5.47	a	39.14
1941	6.03		1.68		1.57		1.65		3.60		0.71	a	0.00		1.13		2.79		1.84		5.08		10.72		36.80
1942	4.30		3.37		1.70		1.78		2.88	a	2.02		0.97		0.41		0.05		2.02		12.49		9.14		41.13
1943	6.00		3.59		6.48	a	1.90		1.37		1.86		0.28		1.29		0.37		5.89		2.46		3.05		34.54
1944	4.11		2.98		2.57		2.95		0.89		0.55		0.19		0.06		2.60		1.40		4.26		2.40		24.96
1945	3.60		5.64		5.70		2.46		3.39		0.14		0.21		0.20		3.68		1.86		10.63		7.35		44.86
1946	6.13		5.32		5.19		1.16		1.68		1.90		0.77		0.15		1.80		4.18		7.45		4.99		40.72
1947	4.53		3.33		3.93		1.34		0.16		3.22		1.03		0.09		0.82		8.03		4.09		5.16		35.73
1948	6.24		5.37		3.93		3.67		4.05		0.97		0.91	a	0.52		2.57		2.03		7.56		8.50		46.32
1949	1.30		10.03		3.40	a	0.54		2.27		0.32	a	0.62		0.18		0.54		2.33		4.25	a	5.40		31.18
1950	10.07		5.99		5.23		1.65		0.35		2.98		0.56		0.88		1.25		8.41		7.32		6.69		51.38
1951	9.07		3.71	a	1.70	g	0.93		1.47	a	0.05		0.05		0.34		2.28		5.83		6.20		6.70	a	36.63	a
1952	4.90		4.06		3.30	a	1.07		0.62		2.38	a	0.00		0.07		0.29		0.67		1.56	a	6.90		25.82
1953	11.99	a	3.49	a	3.58		2.13		2.29	a	2.49		0.06		0.83	a	0.87		2.69		5.44		6.16		42.02
1954	10.23		5.23		1.09		1.15		1.40		2.53		0.26		1.06		1.29		2.97		5.47		5.05		37.73
1955	3.11		2.56		3.25		3.48		0.97		1.18		0.74		0.00		2.05		5.79		7.64	a	10.13		40.90
1956	11.23	a	3.03	a	4.41		0.49		1.31		1.66		0.15		1.35	a	1.54		3.38		1.06		2.42	b	32.03
1957	2.03		4.01		5.98		1.60		2.87		0.97		0.06		0.84		0.63	a	2.58		2.89		7.63		32.09
1958	5.74		7.09		2.19		3.11		1.32		2.03		0.06		0.00		0.87		2.17		6.52		5.64		36.74
1959	9.46		4.14		4.18		0.81		3.16		2.25		0.97		0.05		2.01		2.12		3.44		3.88		36.47
1960	5.11		4.81		5.14		3.54		4.23		0.39		0.00		0.84		0.61		2.98		8.36		2.98		38.99
1961	5.39		9.25		8.32		2.45		2.65		0.28		0.26		0.44		0.31		4.96		4.49		6.54		45.34
1962	1.05		3.33		4.13		3.54		2.04		0.12		0.01		1.42		1.67		4.36		10.36		2.24		34.27
1963	3.69		3.89		5.80		3.95		2.21		2.08		1.14		1.82		0.93		2.80		5.57		4.05		37.93
1964	11.16		0.38		3.30		0.98		0.67		2.37		0.56		0.34		0.60		1.40		7.26		10.87		39.89
1965	7.31		1.89		0.50		2.20		0.82		0.88		0.16		1.30		0.00		1.85		6.85		7.14		30.90
1966	7.63		1.73		6.27		0.47		0.50		1.54		0.75		0.31		1.49		3.04		5.71		9.34		38.78
1967	7.20		1.40		4.74		2.12		0.89		0.68		0.00		0.00		0.40		4.67		2.47		4.88		29.45
1968	6.24		6.90		3.46		1.34		2.60		2.33		0.29		3.84		2.28		4.72		6.77		11.01		51.78
1969	6.82		2.94		0.72		2.17		1.53		2.26		0.03		0.00		2.16		3.54		3.09		8.76		34.02
1970	11.72		4.11		2.16		1.93		0.96		0.32		0.02		0.09		0.92		2.73		4.88		8.90		38.74
1971	5.80		3.41		5.98		3.14		0.74		1.66		0.05		0.50		2.32		2.75		6.05		8.93		41.33
1972	6.77		4.18		6.93		3.11		1.12		0.82		0.29		0.54		3.01		0.58		5.31		8.68		41.34
1973	4.70		2.31		3.10		1.00		0.85		0.87		0.03		1.11		3.01		3.02		12.76		9.68		42.44
1974	9.64		4.45		6.39		1.98		1.29		0.60		1.88		0.18		0.05		1.66		6.62		7.26		42.00
1975	7.94		5.39		4.13		1.65		1.84		0.96		0.94		2.04		0.00		5.75		4.40		6.49		41.53
1976	5.53		5.70		4.55		3.11		1.53		0.69		0.55		2.55		0.95		1.22		0.87		1.54		28.79
1977	1.02		2.28		3.68		0.74		3.27		0.45		1.05		3.03		3.43		2.49		6.00		8.89		36.33
1978	7.12		4.73		1.90		3.20		2.63		0.94		1.13		2.79		3.23		0.54		3.43		2.51		34.15
1979	2.57		7.29		2.05		2.01		1.37		0.94		0.08		2.00		2.56		5.34		4.01		6.18		36.40
1980	7.96		5.11		2.85		3.07		1.33		2.45		0.24		0.13		1.51		1.52		6.99		9.43		42.59
1981	2.22		4.33		2.60		1.81		2.07		2.91		0.18		0.06		2.75		4.13		5.44		10.00		38.50
1982	5.62		7.21		3.07		4.27		0.39		1.32		0.50		2.09		3.46		4.58		4.18		10.64		47.33
1983	6.39		10.11		6.61		2.55		0.91		1.48		2.81		1.78		0.56		1.27		11.08		5.86	d	51.41
1984	1.94		4.76		3.79		3.25		3.75		4.38		0.00		0.04		1.36		3.93		11.00		3.16		41.36
1985	0.32		2.64		3.55		1.01		0.41		3.04		0.30		1.77		1.68		3.26		3.51		2.37		23.86
1986	6.40		6.25		3.47		1.47		2.04		0.21		0.88		0.00		2.37		2.29		5.52		4.56		35.46
1987	7.04		4.49		5.89		1.30		1.42		0.37		1.01		0.33		0.14		0.30		2.83		9.33		34.45
1988	5.71		1.07		3.17		2.23		2.74		2.46		0.20		0.02		0.85		0.11		8.00		2.65		29.21
1989	3.53		2.28		5.78		0.81		1.90		0.81		0.36		0.45		0.68		1.92		3.15		2.94		24.61
1990	9.66		3.68		1.59		1.70		2.11		1.55		0.37		1.07		0.58		3.83		3.57		2.91		32.62
1991	3.01		3.84		3.67		4.88		2.34		1.70		0.25		0.65		0.39		1.66		5.66		4.76		32.81
1992	4.65		3.70		1.17		4.06		0.13		0.36		0.77		0.31		1.21		2.47		4.54		6.44		29.81
1993	4.27		0.87		3.77		5.03		3.52		2.68		1.49		0.16		0.00		1.08		1.26		7.54		31.67
1994	4.42		5.06		2.85		1.18		1.15		0.94		0.00		0.42		0.60		6.48		6.32		6.00		35.42
1995	8.63		3.47		5.37		3.96		1.35		1.80		0.98		0.39		1.57		2.91		8.32		7.82		46.57
1996	7.56		10.23		2.93		4.63		4.34		0.97		0.58		0.13		2.96		4.22		9.21		14.83		62.59
1997	7.67		2.03		6.33		2.18		2.01		2.07		-----	z	1.59		3.15		5.45		5.91		3.34		41.73	a
1998	8.36		6.64		4.07		1.30		4.77		1.49		0.07		0.00		0.90		2.84		11.01		6.84		48.29
1999	7.95		10.31		3.90		1.86		1.81		1.29		0.48		-----	z	-----	z	2.01		8.20		4.44		42.25	b
2000	6.98		3.82		3.02		1.00		1.96		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	16.78	g
2001	-----	z	-----	z	-----	z	-----	z	1.10		1.55		0.50		1.59		0.65		3.04		7.68		8.20		24.31	d
2002	7.86		3.21		3.58		1.68		1.37		1.21	b	0.00		0.04		0.44	b	0.67		3.01	c	10.46		33.53
2003	7.67		3.65		5.81		6.35		0.68		-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	24.16	g
Period of Record Statistics
MEAN	5.97		4.43		3.93		2.22		1.79		1.41		0.46		0.73		1.43		3.00		5.62		6.79		37.54
S.D.	2.64		2.30		1.71		1.30		1.11		0.96		0.50		0.83		1.02		1.77		2.98		2.99		7.46
SKEW	0.18		0.94		0.19		0.92		0.75		0.60		1.93		1.52		0.44		0.82		0.43		0.31		0.55
MAX	11.99		10.31		8.32		6.35		4.77		4.38		2.81		3.84		3.68		8.41		12.76		14.83		62.59
MIN	0.32		0.38		0.50		0.23		0.13		0.00		0.00		0.00		0.00		0.11		0.40		1.54		23.70
YRS	73		73		72		73		74		72		71		71		71		72		73		73		68