N WILLAMETTE EXP STN, OREGON

Monthly Total Precipitation (inches)

(356151)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200708
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
1963 1.14 a 4.02 6.48 0.00 z 4.34 1.62 0.81 0.36 1.11 3.09 5.86 4.45 33.28
1964 11.36 0.83 2.93 1.21 0.94 1.67 0.74 0.58 1.49 1.52 7.21 13.84 44.32
1965 8.51 2.07 1.09 3.23 1.30 0.66 0.23 0.99 0.05 2.79 6.63 6.78 34.33
1966 7.84 1.92 5.96 1.22 0.93 1.18 1.16 0.31 1.41 2.97 5.62 6.57 37.09
1967 6.77 1.53 4.79 2.58 2.12 0.72 0.00 0.00 0.26 5.58 2.04 5.65 32.04
1968 4.68 8.20 3.06 2.04 2.99 2.34 0.98 4.17 2.75 6.88 7.02 12.46 b 57.57
1969 7.41 3.03 1.45 2.99 1.76 3.20 0.11 0.08 3.42 4.69 2.94 8.53 39.61
1970 11.72 5.12 2.30 2.36 1.30 0.31 0.07 0.00 1.38 3.49 6.94 8.92 43.91
1971 7.59 3.49 5.59 3.71 1.77 2.92 0.08 0.43 3.51 3.69 6.49 8.02 47.29
1972 6.59 4.78 5.77 3.61 2.65 0.60 0.47 0.65 3.50 0.87 5.07 8.81 43.37
1973 4.45 1.96 2.67 b 1.28 1.56 1.47 0.01 0.82 2.58 2.94 13.04 10.02 42.80
1974 8.24 5.48 6.28 2.23 1.98 0.96 2.31 0.02 0.26 1.62 6.56 6.53 42.47
1975 6.84 4.24 2.22 2.46 1.86 1.27 0.65 2.53 0.00 5.61 4.37 6.66 38.71
1976 6.32 6.68 2.82 3.00 1.48 0.57 0.95 2.41 1.18 0.85 1.67 1.48 29.41
1977 1.37 2.80 4.26 0.64 3.82 1.54 0.83 2.69 3.23 2.45 6.61 10.52 40.76
1978 5.35 3.59 1.69 3.50 4.52 1.69 0.90 2.08 2.74 0.37 4.92 3.54 34.89
1979 3.45 7.36 3.22 3.35 2.36 0.47 0.82 0.82 3.25 5.35 3.77 6.75 40.97
1980 9.99 4.68 3.59 4.07 1.23 2.52 0.14 0.49 1.69 1.67 6.87 11.90 48.84
1981 2.01 4.11 3.48 2.29 2.23 4.27 0.19 0.03 2.68 4.14 5.39 10.27 41.09
1982 6.24 6.94 3.12 4.78 0.89 0.86 0.34 0.99 3.61 3.74 5.04 8.92 45.47
1983 7.57 9.54 7.18 2.77 2.13 2.60 2.68 2.52 0.86 2.25 9.04 6.33 55.47
1984 3.05 4.69 4.46 4.09 4.59 5.35 0.00 0.03 1.99 5.78 12.90 3.68 50.61
1985 0.45 3.49 4.54 1.42 0.97 2.48 0.45 0.79 1.93 3.17 5.00 2.46 27.15
1986 5.83 7.65 2.95 2.09 2.74 0.38 1.28 0.04 2.93 2.81 6.71 4.13 39.54
1987 6.75 4.94 5.55 2.19 1.66 0.30 2.00 0.10 0.53 0.23 2.40 10.55 37.20
1988 7.88 1.71 3.73 4.63 2.56 2.55 0.21 0.03 1.25 0.20 9.88 3.28 37.91
1989 4.24 3.16 7.02 1.24 2.27 0.91 0.52 1.37 1.34 2.15 3.72 4.15 32.09
1990 8.98 4.97 3.42 2.22 1.71 2.94 0.54 1.09 0.50 6.18 a 5.00 3.39 40.94
1991 2.83 3.69 4.39 4.62 4.58 0.00 z 0.16 0.75 0.30 3.70 7.31 5.53 37.86
1992 5.34 5.23 1.46 4.28 0.19 0.63 1.31 0.48 1.88 4.83 5.15 6.71 37.49
1993 2.96 i 0.26 e 5.32 6.30 4.25 2.20 a 2.44 0.30 0.00 1.35 1.39 6.90 30.71
1994 4.78 6.93 3.58 1.88 1.63 1.57 0.06 0.02 1.12 6.94 8.32 7.70 44.53
1995 7.65 4.45 b 4.42 5.14 1.84 2.07 0.60 a 1.55 1.52 5.63 10.18 7.66 52.71
1996 9.09 12.04 a 3.91 6.76 4.63 1.05 0.80 0.14 3.06 5.51 11.39 15.72 74.10
1997 9.55 3.34 8.59 4.59 2.47 2.97 0.80 1.11 3.38 a 6.25 b 4.65 3.41 51.11
1998 8.98 a 5.73 4.91 1.42 5.57 1.27 0.22 0.25 0.90 4.69 10.96 0.54 45.44
1999 7.58 9.08 4.68 1.35 2.53 1.23 0.18 0.47 0.05 2.47 7.68 4.35 41.65
2000 6.21 5.15 3.46 2.15 2.39 1.40 0.01 0.00 0.00 z 3.21 3.04 3.16 30.18
2001 1.55 1.28 3.51 0.69 v 1.05 1.67 0.73 1.19 0.69 3.80 0.00 z 0.00 z 15.47
2002 0.00 z 0.00 z 5.59 2.44 1.35 1.83 0.07 0.24 1.95 0.00 z 3.22 a 10.02 26.71
2003 8.73 2.99 7.14 5.64 1.05 0.28 0.00 0.42 0.95 2.45 a 4.31 9.84 43.80
2004 6.19 4.04 1.09 a 1.07 1.92 1.63 0.12 2.52 1.74 b 4.34 2.71 4.46 31.83
2005 1.87 0.58 5.00 2.97 5.02 2.75 0.58 0.00 2.14 2.63 c 6.22 a 10.53 40.29
2006 13.70 2.77 4.30 2.77 2.79 0.99 0.07 0.11 0.84 1.68 13.05 a 7.43 b 50.50
2007 4.75 5.26 a 5.29 2.26 0.90 0.53 0.63 0.66 0.00 z 0.00 z 0.00 z 0.00 z 20.28
Period of Record Statistics
MEAN 6.31 4.45 4.18 2.95 2.33 1.65 0.63 0.81 1.67 3.41 6.24 7.04 42.61
S.D. 3.00 2.49 1.73 1.46 1.31 1.09 0.66 0.95 1.13 1.84 3.03 3.37 8.71
SKEW 0.02 0.76 0.26 0.72 0.86 1.16 1.56 1.59 0.23 0.14 0.67 0.36 1.18
MAX 13.70 12.04 8.59 6.76 5.57 5.35 2.68 4.17 3.61 6.94 13.05 15.72 74.10
MIN 0.45 0.26 1.09 0.64 0.19 0.28 0.00 0.00 0.00 0.20 1.39 0.54 27.15
NO YRS 43 44 45 43 45 44 45 45 43 43 43 43 38