OLYMPIA WSO AP, WASHINGTON

Monthly Total Precipitation (inches)

(456114)

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1.35 1.10 2.27 3.92 4.35 10.19 12.11 35.29
1949 0.69 9.96 3.75 1.52 1.54 0.72 0.51 0.82 1.39 5.24 12.33 10.73 49.20
1950 9.31 9.66 10.13 3.10 0.79 0.86 1.35 1.47 2.19 9.20 9.49 9.16 66.71
1951 10.59 11.28 5.89 0.54 1.91 0.05 0.28 0.54 2.83 6.95 7.32 5.80 53.98
1952 5.65 3.96 3.13 2.25 0.85 1.22 0.10 0.74 0.43 1.55 1.39 8.65 29.92
1953 19.84 5.12 3.55 2.58 2.72 1.50 0.27 1.63 2.68 6.85 7.79 9.42 63.95
1954 11.96 8.40 3.13 4.07 1.63 3.36 0.82 1.74 1.89 3.38 7.87 6.99 55.24
1955 3.01 5.23 4.76 4.19 1.35 0.71 2.68 0.02 1.84 9.31 12.18 12.59 57.87
1956 10.75 3.93 8.27 0.37 0.30 2.57 0.38 0.88 2.30 9.52 2.81 9.36 51.44
1957 3.02 5.88 7.43 1.72 1.42 1.78 0.97 0.87 0.66 4.74 4.05 8.91 41.45
1958 7.87 6.40 2.29 4.39 1.47 1.65 0.00 0.62 1.52 5.41 12.35 8.43 52.40
1959 8.91 4.53 4.63 4.51 1.45 1.85 0.30 0.70 4.26 3.92 10.36 7.50 52.92
1960 6.35 5.93 6.12 4.53 3.50 0.59 0.00 1.16 1.21 5.84 11.33 3.89 50.45
1961 8.69 13.18 6.26 3.29 2.93 1.05 0.80 1.01 0.33 4.97 6.78 8.25 57.54
1962 3.22 3.72 3.82 4.50 1.81 0.89 0.14 3.17 2.45 6.00 15.51 5.81 51.04
1963 3.47 6.42 5.10 4.13 1.76 0.63 1.48 0.79 2.16 5.98 10.32 5.55 47.79
1964 15.13 2.54 4.47 1.58 0.98 2.35 1.07 1.47 2.26 1.79 9.18 9.11 51.93
1965 9.37 4.93 0.48 3.61 1.89 0.33 0.48 2.05 0.60 3.30 5.84 7.81 40.69
1966 7.89 3.38 7.28 1.71 1.30 1.28 1.34 0.68 1.95 4.83 8.16 11.53 51.33
1967 12.21 3.58 4.31 2.88 0.25 1.49 0.02 0.00 1.36 10.08 3.90 5.94 46.02
1968 9.04 7.83 6.53 3.02 2.57 2.43 0.89 5.45 2.51 6.07 7.96 9.95 64.25
1969 9.45 3.41 2.90 3.44 2.07 1.68 0.50 0.18 5.23 2.69 3.60 7.24 42.39
1970 12.48 4.30 3.07 4.76 1.21 0.14 0.16 0.15 3.20 2.71 7.40 14.32 53.90
1971 11.15 4.41 9.11 2.78 1.50 3.00 0.78 0.71 3.06 4.43 7.59 9.18 57.70
1972 12.43 11.06 10.01 5.87 0.83 1.07 1.72 0.70 5.04 0.85 4.17 10.66 64.41
1973 5.66 1.71 3.02 2.23 2.66 2.60 0.05 0.59 2.18 4.60 12.95 11.61 49.86
1974 10.57 5.68 6.65 4.77 2.65 1.57 2.29 0.07 0.50 1.38 7.44 8.86 52.43
1975 9.70 5.61 4.32 1.88 1.51 0.72 0.25 3.97 0.00 8.38 9.54 11.42 57.30
1976 9.40 7.25 4.24 2.79 2.66 1.07 1.26 2.71 1.22 2.64 1.37 3.00 39.61
1977 1.55 3.70 4.44 1.27 5.21 0.64 0.32 4.17 4.58 3.40 9.30 12.36 50.94
1978 6.61 4.39 3.45 3.97 2.90 1.54 1.49 1.47 7.59 0.78 6.81 2.95 43.95
1979 2.67 9.25 2.73 2.21 1.40 1.11 1.58 1.56 2.72 6.20 2.38 13.01 46.82
1980 6.27 6.18 3.98 4.14 0.93 2.46 0.41 0.36 2.21 1.84 9.77 10.92 49.47
1981 2.54 9.19 3.86 4.77 1.81 2.96 0.36 0.85 2.44 8.17 7.22 8.60 52.77
1982 7.79 9.91 4.67 3.89 0.51 1.15 0.54 0.55 1.89 6.12 5.74 10.64 53.40
1983 9.99 7.09 6.63 2.26 1.51 2.80 3.00 2.18 1.89 1.66 12.84 7.28 59.13
1984 6.97 5.49 6.42 3.67 5.48 3.74 0.00 0.21 1.76 5.13 12.19 4.97 56.03
1985 0.29 3.54 4.10 2.65 0.94 2.48 0.37 0.70 2.65 9.86 4.99 2.50 35.07
1986 12.14 6.84 2.29 2.87 3.20 0.92 1.11 0.01 3.38 4.12 11.09 5.20 53.17
1987 8.38 3.55 7.14 3.11 2.71 0.32 0.84 0.24 0.29 0.39 3.65 9.14 39.76
1988 5.18 2.35 5.66 4.94 3.36 2.06 0.42 0.43 1.93 2.26 10.14 5.16 43.89
1989 5.41 4.19 7.88 2.49 1.99 1.47 0.70 0.55 0.49 2.42 8.50 5.66 41.75
1990 14.53 8.52 3.54 3.29 2.06 2.86 0.32 1.79 0.03 6.34 15.06 5.05 63.39
1991 5.35 5.85 4.32 7.80 1.69 1.30 0.33 2.31 0.00 2.20 7.00 4.28 42.43
1992 9.45 4.19 1.50 5.15 0.19 1.15 0.36 0.82 2.44 2.80 6.82 5.28 40.15
1993 5.36 0.22 4.95 6.67 4.57 1.77 1.35 0.15 0.00 1.63 2.86 6.02 35.55
1994 3.80 6.38 4.83 1.82 1.44 1.90 0.29 0.80 1.52 7.65 7.75 11.49 49.67
1995 5.76 6.10 6.73 2.70 1.16 1.10 1.71 1.22 1.97 5.20 13.56 7.69 54.90
1996 7.22 a 11.07 2.65 7.61 3.14 1.14 0.71 0.42 2.21 5.46 6.25 11.40 b 59.28
1997 9.22 5.03 11.79 4.80 3.10 2.94 1.18 2.45 4.57 8.18 6.07 5.50 64.83
1998 10.43 5.04 5.71 1.21 2.11 1.29 0.18 0.00 0.31 3.41 15.28 12.99 57.96
1999 12.25 15.50 6.95 1.42 1.54 1.84 0.58 0.69 0.12 3.85 11.93 9.97 66.64
2000 8.13 5.83 5.09 2.40 3.28 2.51 0.06 0.41 1.98 4.27 3.64 3.88 41.48
2001 3.45 2.60 3.84 3.49 1.92 2.63 0.18 2.28 0.53 3.98 13.31 11.86 50.07
2002 11.42 4.32 5.24 4.02 2.04 1.59 0.35 0.10 0.59 0.46 3.96 7.39 41.48
2003 9.60 2.17 7.62 4.72 1.14 0.28 0.14 0.34 1.17 10.72 8.67 5.99 52.56
2004 7.85 2.95 2.83 1.33 2.00 0.93 0.03 3.93 3.88 4.63 3.76 5.30 39.42
2005 5.86 1.01 6.17 4.14 4.06 1.64 0.93 0.19 1.76 5.72 7.21 8.88 47.57
2006 15.86 3.44 3.57 1.89 2.36 1.76 0.11 j 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 28.88
Period of Record Statistics
MEAN 8.09 5.78 5.09 3.34 2.02 1.57 0.72 1.18 2.04 4.76 8.08 8.19 50.65
S.D. 3.92 3.03 2.21 1.58 1.13 0.86 0.67 1.17 1.51 2.63 3.63 2.93 8.50
SKEW 0.29 0.94 0.73 0.60 0.99 0.43 1.38 1.62 1.09 0.41 0.13 0.01 -0.10
MAX 19.84 15.50 11.79 7.80 5.48 3.74 3.00 5.45 7.59 10.72 15.51 14.32 66.71
MIN 0.29 0.22 0.48 0.37 0.19 0.05 0.00 0.00 0.00 0.39 1.37 2.50 29.92
NO YRS 58 58 58 58 58 59 58 58 58 58 58 58 57