CORVALLIS WATER BUREAU, OREGON

Monthly Total Precipitation (inches)

(351877)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
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
1936 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.21 h 0.00 0.58 0.10 0.53 11.15 12.36
1937 13.48 15.90 4.91 12.46 3.33 w 5.56 0.00 1.02 2.30 3.39 19.63 24.97 103.62
1938 6.74 10.49 19.33 2.95 0.94 0.11 0.20 0.00 1.75 5.12 8.24 9.62 65.49
1939 11.00 11.07 5.17 0.72 1.65 1.21 0.21 0.89 0.35 4.43 1.41 19.40 57.51
1940 7.60 17.82 9.73 3.41 3.14 w 0.38 0.36 0.00 2.94 6.38 7.77 9.83 66.22
1941 12.37 l 3.74 2.54 3.29 5.56 n 1.65 0.00 2.03 6.31 2.96 8.27 16.97 g 30.79
1942 8.64 7.09 2.94 2.92 3.25 1.76 0.62 0.11 0.00 2.48 21.80 19.16 70.77
1943 10.27 7.53 13.15 4.56 1.92 1.56 0.28 2.01 0.19 9.23 5.04 5.91 61.65
1944 7.15 4.58 3.97 4.79 1.60 1.35 0.18 0.12 1.21 2.26 7.67 4.43 39.31
1945 9.75 11.21 12.71 6.06 5.36 0.04 0.21 0.15 3.90 1.28 19.32 13.51 83.50
1946 12.92 9.67 8.61 2.71 0.74 2.82 0.65 0.00 2.08 7.81 14.21 10.84 73.06
1947 8.04 7.68 8.85 3.49 0.28 4.85 1.65 0.69 1.74 18.49 4.43 l 6.71 62.47
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.86 0.67 a 2.92 a 3.28 b 12.90 15.10 a 35.73
1949 2.46 23.42 5.08 1.72 4.20 0.67 a 0.42 0.24 2.12 a 2.69 11.76 8.69 63.47
1950 30.47 11.74 10.82 a 3.23 1.42 1.62 0.10 0.80 1.24 18.06 14.77 12.78 107.05
1951 17.71 10.08 10.70 1.91 2.69 0.00 0.42 0.07 0.18 6.56 a 9.51 a 16.88 76.71
1952 9.92 8.02 4.10 1.73 0.62 2.28 a 0.00 0.06 0.05 0.49 2.61 15.11 44.99
1953 23.12 6.49 8.32 3.78 4.08 1.67 0.00 3.24 1.10 2.13 b 11.87 10.57 76.37
1954 16.28 11.76 3.45 5.27 1.75 2.17 0.31 a 0.66 1.08 3.04 8.56 9.80 64.13
1955 4.73 4.52 13.04 5.22 0.21 0.57 0.00 z 0.00 1.47 6.69 9.61 14.35 60.41
1956 18.04 13.71 10.00 0.00 z 0.80 l 0.43 0.07 0.00 z 0.09 9.00 1.30 6.62 59.26
1957 5.85 9.74 11.54 3.77 3.78 1.00 0.29 0.15 0.90 3.91 4.63 13.58 59.14
1958 14.01 12.52 3.65 6.47 0.98 1.56 0.00 0.00 z 1.12 3.61 13.63 7.35 64.90
1959 16.71 8.37 8.18 0.61 2.14 1.71 0.00 z 0.00 z 3.05 2.18 2.54 a 6.04 51.53
1960 6.56 12.69 11.84 6.99 3.74 0.13 0.00 0.00 z 0.62 4.12 16.91 4.73 68.33
1961 9.24 19.69 13.71 2.79 3.31 0.66 0.48 0.38 0.54 5.55 8.33 11.80 76.48
1962 2.05 8.13 10.91 5.38 2.25 0.54 0.00 1.17 2.71 0.00 z 10.81 0.00 z 43.95
1963 0.00 z 9.81 9.92 7.15 5.31 1.24 0.62 0.34 1.30 5.84 11.89 7.13 60.55
1964 20.64 3.27 8.50 2.29 1.15 1.18 0.40 0.51 0.53 1.47 11.41 24.69 a 76.04
1965 20.19 2.36 0.88 3.94 2.32 0.45 0.12 0.69 0.00 3.35 11.02 11.68 57.00
1966 17.98 4.53 14.24 1.54 0.90 0.54 0.23 0.18 1.14 3.71 8.73 11.86 65.58
1967 16.37 3.16 8.42 3.34 0.97 0.40 0.00 0.00 1.85 8.36 6.82 9.79 59.48
1968 10.15 12.95 6.72 1.27 4.05 1.59 0.20 5.26 2.07 6.89 10.10 17.97 79.22
1969 12.12 6.05 4.88 1.84 1.72 1.34 0.00 0.00 4.07 4.58 4.69 15.40 56.69
1970 25.73 7.14 3.47 4.35 1.14 0.47 0.00 0.00 1.61 6.31 12.38 20.38 82.98
1971 15.44 7.54 12.61 6.08 2.90 2.31 0.03 1.08 4.38 4.26 13.24 16.20 86.07
1972 16.56 9.67 9.36 8.14 2.03 2.04 0.00 0.58 2.56 0.98 7.53 12.53 71.98
1973 10.72 2.65 4.76 1.68 1.69 1.45 0.00 0.41 4.00 3.05 27.98 19.97 78.36
1974 19.90 11.14 13.65 4.00 1.80 1.09 1.63 0.00 0.09 0.23 9.58 14.24 77.35
1975 10.96 12.34 9.96 3.61 2.67 0.78 0.80 1.54 0.00 5.94 9.83 12.21 70.64
1976 10.54 12.13 7.44 2.32 1.34 0.24 0.68 1.80 0.55 2.08 1.86 2.41 43.39
1977 1.33 5.66 10.82 0.98 4.75 0.62 0.03 1.80 1.48 4.87 10.52 16.87 59.73
1978 11.67 7.10 3.36 6.76 4.70 0.46 0.47 1.61 3.77 0.71 4.39 5.43 50.43
1979 4.01 15.01 4.35 4.73 3.80 0.53 0.61 1.15 3.03 9.86 6.57 10.43 64.08
1980 12.93 7.79 6.36 6.13 0.83 2.02 0.21 0.00 0.78 1.66 8.56 19.65 66.92
1981 2.86 6.18 5.37 4.02 3.24 3.78 0.25 0.00 3.86 8.35 11.25 22.76 71.92
1982 13.05 12.71 6.00 9.57 0.40 1.44 0.39 0.13 2.33 6.16 9.01 18.21 79.40
1983 12.35 16.22 17.02 3.68 2.53 1.78 1.62 1.64 0.52 1.25 17.98 12.30 88.89
1984 4.69 10.84 6.46 5.35 4.21 3.46 0.60 0.10 1.28 6.47 22.47 6.80 72.73
1985 0.42 5.96 6.02 1.88 1.35 4.19 0.46 0.54 1.57 5.55 5.84 6.01 39.79
1986 12.08 14.63 5.42 3.43 1.89 0.50 0.90 0.00 4.71 4.61 13.63 6.64 68.44
1987 14.80 8.60 7.31 2.39 2.67 0.19 1.33 0.00 0.11 0.31 6.07 18.47 62.25
1988 13.11 2.39 7.75 4.39 4.29 3.27 0.08 0.06 0.75 0.38 18.20 7.07 61.74
1989 8.90 5.24 10.64 2.00 1.91 1.07 0.33 1.12 0.60 4.17 4.43 5.50 45.91
1990 17.84 a 10.31 3.69 3.51 2.74 1.76 0.38 1.35 0.62 5.47 8.59 5.25 61.51
1991 5.24 5.58 8.53 6.63 3.53 1.10 0.26 0.88 0.03 3.07 8.61 4.39 47.85
1992 9.29 8.16 1.37 7.00 0.27 0.31 0.54 0.54 1.51 4.36 8.49 11.06 52.90
1993 7.40 2.25 8.28 9.99 6.07 2.67 1.00 0.35 0.01 1.13 1.79 12.27 53.21
1994 6.72 7.87 5.02 3.64 1.87 2.27 0.05 0.00 1.30 5.96 11.69 12.91 59.30
1995 17.30 8.68 10.06 7.42 1.75 1.83 0.08 0.91 4.08 4.46 13.46 18.38 88.41
1996 16.29 21.86 3.62 8.44 4.88 0.35 1.35 0.13 1.85 5.85 14.18 27.63 106.43
1997 13.83 3.59 10.22 4.98 2.97 1.64 0.36 1.41 5.07 12.14 8.26 7.05 71.52
1998 16.00 12.57 8.66 1.98 5.73 0.47 0.00 0.00 1.57 2.82 20.43 19.17 a 89.40
1999 18.11 24.49 9.46 1.66 3.76 0.64 0.12 0.55 0.04 4.41 13.03 13.35 89.62
2000 12.88 10.24 4.00 2.20 4.14 1.73 0.14 0.00 1.12 3.85 3.90 8.02 52.22
2001 3.53 2.66 4.10 3.56 2.57 2.65 0.40 1.01 0.69 4.20 15.17 17.93 58.47
2002 16.84 5.85 10.48 2.96 1.67 1.10 0.00 0.00 z 0.75 0.53 7.88 17.48 65.54
2003 10.40 5.27 11.25 6.48 1.50 0.19 0.03 0.14 1.19 2.51 9.77 15.56 64.29
2004 11.61 8.01 4.33 4.44 2.11 1.81 0.00 2.05 3.85 5.44 2.77 7.79 54.21
2005 5.54 0.75 8.12 4.06 4.56 3.56 0.13 0.19 0.44 4.87 9.96 19.93 62.11
2006 26.98 4.99 7.46 3.28 1.69 1.32 0.12 0.02 0.62 1.32 26.71 13.76 a 88.27
2007 6.94 11.60 4.17 3.40 1.47 0.52 0.39 0.67 1.17 6.27 7.39 19.06 a 63.05
2008 14.37 5.17 7.92 4.23 0.45 0.91 0.02 1.32 0.25 2.80 7.51 10.62 55.57
2009 6.98 5.85 7.99 2.77 5.17 2.64 0.72 0.19 1.61 5.35 12.18 a 8.91 60.36
2010 11.40 7.85 11.20 8.87 2.81 4.21 0.07 0.65 2.07 6.49 9.43 17.39 82.44
2011 6.20 7.49 14.17 7.46 3.28 0.56 1.12 0.02 a 0.26 2.58 11.57 7.18 61.89
2012 17.10 6.50 18.81 2.66 f 2.58 2.16 f 0.52 0.00 0.00 6.80 13.23 17.81 83.35
2013 3.34 4.02 0.83 o 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 7.36
Period of Record Statistics
MEAN 11.82 8.98 8.16 4.27 2.55 1.47 0.37 0.66 1.58 4.60 10.34 12.73 67.41
S.D. 6.15 4.88 3.93 2.38 1.48 1.19 0.41 0.87 1.42 3.37 5.63 5.62 14.68
SKEW 0.52 1.03 0.55 0.98 0.46 1.27 1.55 2.58 1.11 1.83 0.81 0.37 0.45
MAX 30.47 24.49 19.33 12.46 6.07 5.56 1.65 5.26 6.31 18.49 27.98 27.63 107.05
MIN 0.42 0.75 0.88 0.61 0.21 0.00 0.00 0.00 0.00 0.10 0.53 2.41 39.31
NO YRS 74 76 75 73 71 74 74 72 77 76 76 75 62