WILMINGTON PORTER RSVR, DELAWARE

Monthly Total Precipitation (inches)

(079605)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 201205
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
1931 2.35 1.80 4.26 2.65 4.54 4.60 5.59 9.13 l 1.29 2.09 1.07 2.29 32.53
1932 6.02 2.15 r 6.87 t 1.38 u 4.02 4.91 1.55 3.50 u 2.97 6.21 6.84 t 3.38 p 25.68
1933 2.86 t 3.59 5.14 5.75 6.16 1.49 6.12 11.10 3.46 1.79 1.04 2.96 p 45.64
1934 2.83 2.83 3.60 4.00 4.16 o 4.78 4.52 o 5.33 6.98 1.64 4.38 3.45 p 36.37
1935 5.04 3.48 2.76 l 3.68 3.40 5.00 l 4.23 m 4.60 m 6.60 3.09 6.25 2.53 34.07
1936 7.45 m 2.72 5.97 m 2.98 2.90 y 3.39 q 2.71 7.01 t 3.47 3.11 0.78 5.46 21.23
1937 6.36 2.30 2.09 r 4.41 2.22 q 5.48 l 2.58 p 6.57 2.69 5.29 3.19 1.38 32.19
1938 2.40 q 2.52 2.41 2.02 4.05 8.37 6.94 5.24 8.10 1.85 v 2.80 3.48 45.93
1939 3.42 o 5.90 3.85 6.47 0.35 5.59 n 1.67 6.78 0.87 5.68 0.72 1.90 34.19
1940 1.51 2.87 5.64 6.17 l 4.88 2.04 1.87 5.33 2.99 x 2.69 q 4.58 2.62 31.34
1941 3.17 n 1.88 1.99 2.90 1.42 3.61 5.66 n 3.21 0.73 1.94 2.91 3.78 24.37
1942 2.89 2.67 5.60 1.12 2.49 2.41 9.05 9.54 2.14 3.98 3.08 4.37 49.34
1943 2.73 1.88 2.76 3.56 6.24 j 4.05 3.87 1.12 0.45 6.20 3.54 1.45 31.61
1944 3.39 2.00 6.02 5.20 2.31 5.06 1.31 3.53 6.58 2.14 4.60 3.35 45.49
1945 4.27 3.15 2.73 4.32 5.17 4.80 9.94 10.67 4.41 1.85 5.70 4.04 61.05
1946 1.76 1.95 3.29 1.88 7.12 6.42 4.76 6.26 3.91 2.11 1.38 2.25 43.09
1947 3.72 1.47 2.39 6.20 7.24 4.29 3.04 r 2.31 2.19 2.23 9.11 s 1.80 33.84
1948 4.87 m 2.21 3.67 o 3.22 7.53 p 4.95 l 1.87 4.19 2.09 1.68 4.94 5.20 25.40
1949 6.13 3.52 2.78 2.80 6.52 0.29 5.29 3.23 3.08 b 4.11 0.96 2.91 41.62
1950 1.76 3.00 4.80 1.92 4.19 2.74 3.99 a 4.54 4.83 2.64 1.50 a 2.14 38.05
1951 3.75 2.76 4.13 2.52 4.00 4.51 3.37 1.35 1.60 2.76 7.47 6.00 44.22
1952 4.73 a 1.98 f 5.14 6.35 5.81 3.08 9.58 3.43 3.15 0.32 5.63 4.00 51.22
1953 4.87 2.62 5.83 5.35 5.81 2.39 5.93 2.48 2.74 3.26 2.09 4.55 47.92
1954 2.31 1.79 4.01 3.84 2.76 0.72 1.18 6.41 2.75 2.16 4.34 2.90 35.17
1955 0.46 2.74 4.43 2.28 1.33 5.43 0.65 11.16 1.83 3.15 1.38 0.16 35.00
1956 2.40 4.11 4.47 3.36 a 2.80 3.28 7.21 2.78 2.91 4.70 5.74 3.54 47.30
1957 1.72 3.49 2.72 3.89 1.60 2.00 0.97 2.04 4.80 2.88 3.69 5.33 35.13
1958 3.62 3.84 5.91 5.60 4.34 4.54 6.80 6.99 2.87 4.40 2.63 1.53 53.07
1959 2.25 1.71 3.53 2.22 1.12 6.06 4.47 6.70 2.19 3.95 3.62 3.98 41.80
1960 3.38 4.24 1.46 3.61 6.48 1.03 7.49 3.27 8.26 3.00 1.70 2.47 46.39
1961 2.43 2.85 4.99 5.51 3.45 4.03 6.60 4.45 3.29 2.72 2.65 3.10 46.07
1962 2.90 3.73 3.97 3.99 1.73 4.79 1.31 4.04 3.19 1.36 5.47 2.62 39.10
1963 1.88 2.21 4.20 1.85 1.39 3.11 1.87 5.58 4.88 0.13 7.59 2.00 36.69
1964 4.52 3.23 1.99 6.74 0.39 1.24 3.72 2.38 2.46 1.64 1.90 5.54 35.75
1965 2.72 3.05 3.30 2.73 1.64 3.36 6.71 3.24 2.40 2.47 1.43 1.99 35.04
1966 4.25 5.13 1.08 3.96 2.54 0.75 2.66 0.83 8.17 5.50 2.29 4.22 41.38
1967 1.89 2.23 4.86 2.99 3.84 3.75 7.86 12.41 3.38 2.21 2.50 5.63 53.55
1968 2.16 1.36 5.88 1.67 4.76 3.30 1.71 0.41 2.42 3.11 4.17 2.65 33.60
1969 2.06 1.41 2.05 1.77 3.43 4.68 6.87 2.64 5.34 1.45 2.23 6.54 40.47
1970 1.24 2.80 4.38 5.90 1.53 4.93 3.96 3.97 1.25 5.08 6.59 2.93 44.56
1971 2.57 6.67 2.03 1.72 5.74 1.36 2.45 9.09 11.16 6.46 5.36 1.73 56.34
1972 2.62 5.22 2.81 4.79 4.29 7.36 3.29 0.81 1.10 3.65 8.31 6.26 50.51
1973 5.08 3.57 4.34 7.16 6.05 5.88 2.64 3.32 2.94 4.12 0.78 8.47 54.35
1974 2.48 2.28 4.83 3.48 3.65 4.68 2.96 6.36 5.99 2.16 1.52 4.61 45.00
1975 4.68 2.60 5.13 3.20 5.48 10.15 5.25 2.95 5.32 3.09 2.85 3.52 54.22
1976 4.60 2.07 1.41 1.04 5.62 4.31 5.29 2.42 2.65 6.46 0.34 1.29 37.50
1977 1.78 1.24 6.64 5.88 0.85 6.10 1.12 6.38 3.85 4.69 9.29 6.52 54.34
1978 8.14 0.84 6.02 2.25 8.23 4.65 5.25 6.39 2.14 1.89 2.58 5.69 54.07
1979 8.45 7.02 3.12 5.50 3.45 4.82 2.73 6.11 7.01 3.58 3.88 1.73 57.40
1980 2.81 0.79 7.30 5.28 3.10 3.66 2.11 2.25 2.14 4.59 2.75 0.68 37.46
1981 0.86 4.05 1.60 3.04 6.17 3.79 3.05 4.57 3.50 4.14 1.13 4.67 40.57
1982 4.83 3.56 2.84 6.46 4.15 6.29 2.46 4.15 0.00 z 2.45 3.61 1.96 42.76
1983 3.63 2.95 7.55 8.10 7.93 3.23 1.09 1.20 3.29 5.06 6.33 9.99 60.35
1984 1.53 4.16 5.98 5.20 6.22 5.02 8.95 1.34 2.50 4.02 1.93 2.58 49.43
1985 1.79 2.48 2.32 0.55 5.94 2.27 7.75 3.51 5.96 2.11 5.95 0.89 41.52
1986 5.37 4.21 1.52 4.27 1.80 3.29 2.76 3.32 2.47 2.82 6.06 6.82 44.71
1987 5.87 1.21 2.14 4.35 4.69 2.01 4.60 2.19 6.13 2.30 4.55 2.43 42.47
1988 2.90 3.55 2.12 3.86 5.68 0.32 6.58 5.16 3.10 2.03 5.81 1.02 42.13
1989 3.11 3.33 5.31 3.06 7.95 4.75 14.86 3.20 4.75 5.45 2.10 1.27 59.14
1990 4.85 1.81 2.67 3.99 8.14 3.81 3.19 6.98 3.19 2.28 2.19 5.94 49.04
1991 4.85 1.11 4.68 3.75 1.80 5.77 5.57 5.42 5.99 1.50 1.69 4.57 46.70
1992 1.69 2.46 4.57 2.08 4.57 2.87 4.59 2.46 5.16 1.17 4.67 4.99 41.28
1993 3.50 3.22 7.84 7.15 4.99 2.40 2.93 3.14 8.43 3.35 3.34 4.52 54.81
1994 7.02 3.92 7.33 3.69 4.48 2.46 12.27 4.88 4.03 1.04 3.56 2.75 57.43
1995 3.51 2.94 2.83 2.43 4.03 1.70 4.36 1.92 4.98 9.14 4.65 2.65 45.14
1996 6.16 2.39 4.88 7.03 4.21 5.45 10.10 3.41 6.00 5.89 3.67 9.70 68.89
1997 2.75 2.62 6.08 3.28 2.61 3.49 3.01 4.02 1.70 2.34 4.07 2.97 38.94
1998 5.59 3.53 5.37 3.35 4.31 4.59 2.94 1.30 2.93 3.07 1.50 1.10 39.58
1999 6.90 b 4.14 a 5.07 3.42 3.71 1.90 2.39 6.36 14.03 4.05 2.47 3.08 57.52
2000 3.41 1.92 9.63 3.11 3.79 6.23 6.15 2.73 5.93 0.69 2.84 3.93 a 50.36
2001 3.15 3.37 6.23 1.94 5.42 4.60 1.57 a 3.28 a 2.79 0.87 1.13 2.72 37.07
2002 3.44 a 0.44 5.54 3.07 4.77 4.38 2.21 2.06 3.63 7.63 4.53 5.36 a 47.06
2003 2.57 a 6.00 5.17 2.78 4.09 9.91 1.95 8.56 9.49 5.56 3.65 5.25 64.98
2004 1.98 2.68 3.76 6.26 3.66 7.14 11.66 3.08 9.55 2.96 5.16 0.00 z 57.89
2005 4.49 2.61 4.49 6.21 1.89 2.08 4.71 a 2.03 0.95 7.23 2.64 3.83 a 43.16
2006 3.75 a 1.63 0.60 4.46 2.07 12.23 4.72 2.87 7.47 6.16 4.79 1.98 52.73
2007 5.21 1.86 4.17 7.69 a 1.75 3.92 2.85 a 5.84 1.00 5.94 1.78 5.28 47.29
2008 1.83 4.59 5.13 2.22 3.88 2.45 7.07 1.34 5.57 2.26 4.02 4.46 44.82
2009 2.09 0.94 b 2.35 4.96 a 4.25 5.94 4.82 8.07 4.59 8.44 1.97 8.75 57.17
2010 2.49 6.25 6.24 2.70 2.48 1.40 9.66 1.61 5.17 2.32 2.60 2.36 b 45.28
2011 2.97 3.05 4.87 5.11 4.58 3.11 0.88 14.75 5.96 3.75 4.48 5.61 59.12
2012 3.01 2.00 1.23 2.49 h 1.02 x 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 6.24
Period of Record Statistics
MEAN 3.51 2.93 4.17 3.94 4.04 4.06 4.63 4.50 4.19 3.45 3.48 3.72 46.89
S.D. 1.69 1.34 1.81 1.72 1.91 2.20 3.00 2.89 2.55 1.90 1.94 2.07 8.24
SKEW 0.80 0.89 0.27 0.41 0.16 1.03 1.03 1.25 1.22 0.79 0.66 0.88 0.46
MAX 8.45 7.02 9.63 8.10 8.23 12.23 14.86 14.75 14.03 9.14 9.29 9.99 68.89
MIN 0.46 0.44 0.60 0.55 0.35 0.29 0.65 0.41 0.45 0.13 0.34 0.16 33.60
NO YRS 76 80 77 79 76 76 76 77 79 79 79 77 64