PORTLAND WSO CITY, OREGON

Monthly Total Precipitation (inches)

(356761)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 197306
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
1928 5.11 1.19 7.21 4.47 0.74 0.44 0.42 0.00 0.65 1.65 5.30 7.51 34.69
1929 3.50 0.97 2.90 4.06 1.14 2.19 0.11 0.23 0.31 1.33 0.67 8.79 26.20
1930 3.43 5.03 2.21 2.72 3.08 0.69 0.00 0.06 1.79 2.15 2.84 3.16 27.16
1931 4.29 2.40 8.12 2.40 1.09 3.13 0.00 0.04 2.10 4.32 6.38 8.40 42.67
1932 5.63 2.58 6.08 3.57 1.50 0.07 0.48 0.45 0.11 3.76 7.58 7.87 39.68
1933 7.94 4.26 5.10 0.95 3.59 2.60 0.00 0.86 2.97 4.59 2.54 17.45 52.85
1934 6.02 1.40 5.18 2.46 1.60 0.96 0.11 0.33 1.32 5.30 10.47 10.83 45.98
1935 3.45 3.17 5.28 2.48 0.61 0.50 0.28 0.20 0.86 3.20 3.27 5.89 29.19
1936 8.55 4.73 3.10 0.80 3.72 2.43 0.40 0.07 1.41 0.44 0.36 8.28 34.29
1937 6.02 6.34 2.86 6.22 1.06 3.88 0.20 1.41 2.06 2.91 10.08 13.86 56.90
1938 5.06 7.83 6.42 2.02 0.65 0.45 0.25 0.35 1.38 2.87 4.83 4.16 36.27
1939 4.69 5.26 2.29 0.55 1.08 1.73 0.79 1.52 0.60 2.14 1.73 8.37 30.75
1940 2.36 10.82 5.12 2.76 1.57 0.06 0.39 0.07 3.56 4.24 a 4.82 5.03 40.80
1941 5.24 1.45 2.01 1.56 4.97 1.05 0.00 1.63 3.58 2.45 4.62 10.38 38.94
1942 4.18 4.19 1.81 1.98 2.59 2.04 0.96 0.48 0.09 3.75 14.38 11.09 47.54
1943 6.30 4.04 7.26 2.56 1.65 3.04 0.59 1.19 0.09 6.21 2.20 3.03 38.16
1944 3.75 3.82 2.57 3.13 1.07 0.77 0.09 0.07 2.40 1.47 5.80 2.18 27.12
1945 4.07 5.25 7.12 2.95 4.46 0.41 0.60 0.52 3.98 1.73 10.47 6.04 47.60
1946 5.49 5.72 5.68 0.98 1.19 2.00 0.98 0.25 1.40 4.98 7.20 6.01 41.88
1947 4.28 3.12 5.29 2.09 0.87 2.95 1.30 0.27 0.96 9.70 3.31 4.79 38.93
1948 6.72 6.42 4.09 4.58 3.88 1.42 0.32 1.55 3.86 2.42 7.33 a 10.04 52.63
1949 0.90 11.43 3.33 0.89 2.77 0.44 0.62 a 0.15 1.23 2.72 6.15 5.44 36.07
1950 11.68 6.10 5.69 2.31 0.76 1.50 0.77 a 0.47 1.66 8.88 10.65 6.91 57.38
1951 9.58 4.90 4.70 1.24 1.61 0.03 0.13 0.13 2.89 6.90 6.42 6.64 45.17
1952 5.71 4.27 3.78 1.44 0.98 2.09 0.00 0.19 0.30 0.72 1.80 7.55 28.83
1953 14.67 4.20 4.77 1.95 2.61 2.49 0.06 2.84 1.77 2.75 6.71 9.20 54.02
1954 11.69 5.09 2.83 3.21 2.25 3.42 0.43 1.79 1.14 3.20 5.41 6.11 46.57
1955 2.80 3.66 4.46 5.67 1.10 1.32 1.14 0.00 3.22 6.98 8.87 11.02 50.24
1956 14.11 3.82 6.20 0.50 1.46 1.90 0.09 2.40 1.24 6.07 1.52 3.90 43.21
1957 2.97 4.41 8.37 1.98 2.18 0.98 0.23 0.39 a 0.59 3.17 3.99 9.20 38.46
1958 8.09 6.32 2.92 4.54 0.86 3.14 0.00 0.03 1.34 1.91 7.34 5.70 42.19
1959 9.19 4.93 4.61 1.58 3.73 2.80 0.61 0.07 2.78 4.00 3.57 3.73 41.60
1960 4.55 a 2.68 f 6.49 4.20 4.07 0.65 0.00 1.05 1.35 2.75 10.65 3.62 39.38
1961 4.98 10.99 8.28 3.29 3.35 0.49 0.35 0.98 0.80 4.04 5.45 6.74 49.74
1962 1.58 4.27 4.79 3.81 2.79 0.85 0.00 1.55 1.66 4.18 10.63 2.86 38.97
1963 3.00 4.42 6.66 4.72 3.58 2.40 1.43 1.01 1.12 3.35 7.25 4.70 43.64
1964 13.63 1.33 3.21 1.97 0.93 2.22 0.00 z 1.03 1.54 1.00 10.12 11.45 48.43
1965 8.92 2.08 1.49 2.32 1.33 0.85 0.34 0.86 0.04 2.21 7.26 9.95 37.65
1966 8.90 2.55 7.09 1.05 1.15 1.15 0.98 0.92 1.76 4.07 6.70 9.02 45.34
1967 8.64 2.55 5.66 3.42 1.23 0.91 0.00 0.00 0.79 6.12 3.25 6.40 38.97
1968 6.10 7.24 3.79 2.66 3.76 2.16 0.25 4.25 2.87 5.96 8.03 12.92 59.99
1969 10.70 3.72 1.31 3.16 1.52 2.70 0.04 0.27 4.87 4.05 3.56 10.07 45.97
1970 15.22 5.69 2.83 3.83 1.52 0.72 0.12 0.00 1.83 3.04 7.60 10.24 52.64
1971 9.18 5.35 5.96 3.35 1.14 2.17 0.22 0.48 4.16 2.98 6.87 11.74 53.60
1972 7.13 5.63 6.64 4.86 2.45 0.41 0.32 0.61 3.69 0.99 4.70 10.13 47.56
1973 4.49 2.27 2.97 1.07 1.22 2.11 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 14.13
Period of Record Statistics
MEAN 6.62 4.60 4.71 2.70 2.01 1.58 0.37 0.73 1.78 3.64 6.02 7.74 42.51
S.D. 3.53 2.40 1.94 1.39 1.19 1.03 0.38 0.86 1.24 2.05 3.14 3.28 8.62
SKEW 0.81 1.05 0.08 0.45 0.81 0.28 1.12 2.01 0.65 0.94 0.32 0.49 -0.04
MAX 15.22 11.43 8.37 6.22 4.97 3.88 1.43 4.25 4.87 9.70 14.38 17.45 59.99
MIN 0.90 0.97 1.31 0.50 0.61 0.03 0.00 0.00 0.04 0.44 0.36 2.18 26.20
NO YRS 46 45 46 46 46 46 44 45 45 45 45 45 43