RESTON, OREGON

Monthly Total Precipitation (inches)

(357112)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200408
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
1909 0.00 z 0.00 z 0.00 z 0.00 z 1.61 0.63 0.28 0.00 1.39 6.39 18.29 6.45 35.04
1910 6.46 6.60 1.55 b 3.17 1.28 0.55 b 0.00 0.00 0.74 3.62 13.11 6.39 43.47
1911 8.01 b 3.47 1.69 3.72 3.12 b 0.51 0.00 0.00 3.43 1.31 6.82 8.46 40.54
1912 8.39 b 9.43 5.98 2.70 c 3.15 2.53 0.02 1.05 2.75 4.84 8.26 11.39 60.49
1913 10.43 1.10 4.28 4.39 0.94 1.80 1.02 0.17 0.97 3.91 9.44 4.80 43.25
1914 14.30 4.79 4.87 3.26 0.48 2.04 0.03 0.00 4.95 4.85 5.49 4.88 a 49.94
1915 7.71 5.67 a 2.35 1.73 4.75 0.46 0.51 0.00 0.44 1.13 13.57 7.08 45.40
1916 11.13 7.54 9.21 2.82 2.87 0.62 1.87 0.21 0.51 0.74 7.97 7.97 53.46
1917 5.43 6.88 8.26 4.09 2.26 0.34 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 27.26
1918 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 0.00 z 0.00 z 0.00 z 0.00
1919 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 0.00 z 0.00 z 0.00 z 0.00
1920 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 0.00 z 0.00 z 0.00 z 0.00
1921 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 0.00 z 0.00 z 0.00 z 0.00
1922 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 0.00 z 0.00 z 0.00 z 0.00
1923 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 0.00 z 0.00 z 0.00 z 0.00
1924 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 0.00 z 0.00 z 0.00 z 0.00
1925 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 0.00 z 0.00 z 0.00 z 0.00
1926 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 0.00 z 0.00 z 0.00 z 0.00
1927 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 0.00 z 0.00 z 0.00 z 0.00
1928 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 0.00 z 0.00 z 0.00 z 0.00
1929 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 0.00 z 0.00 z 0.00 z 0.00
1930 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 0.00 z 0.00 z 0.00 z 0.00
1931 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 0.00 z 0.00 z 0.00 z 0.00
1932 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 0.00 z 0.00 z 0.00 z 0.00
1933 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 0.00 z 0.00 z 0.00 z 0.00
1934 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 0.00 z 0.00 z 0.00 z 0.00
1935 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 0.00 z 0.00 z 0.00 z 0.00
1936 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 0.00 z 0.00 z 0.00 z 0.00
1937 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 0.00 z 0.00 z 0.00 z 0.00
1938 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 0.00 z 0.00 z 0.00 z 0.00
1939 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 0.00 z 0.00 z 0.00 z 0.00
1940 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 0.00 z 0.00 z 0.00 z 0.00
1941 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 0.00 z 0.00 z 0.00 z 0.00
1942 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 0.00 z 0.00 z 0.00 z 0.00
1943 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 0.00 z 0.00 z 0.00 z 0.00
1944 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 0.00 z 0.00 z 0.00 z 0.00
1945 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 0.00 z 0.00 z 0.00 z 0.00
1946 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 0.00 z 0.00 z 0.00 z 0.00
1947 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 0.00 z 0.00 z 0.00 z 0.00
1948 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 0.00 z 0.00 z 0.00 z 0.00
1949 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 0.00 z 0.00 z 0.00 z 0.00
1950 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 0.00 z 0.00 z 0.00 z 0.00
1951 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 0.00 z 0.00 z 0.00 z 0.00
1952 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 0.00 z 0.00 z 0.00 z 0.00
1953 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 0.00 z 0.00 z 0.00 z 0.00
1954 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 0.00 z 0.00 z 0.00 z 0.00
1955 0.00 z 0.00 z 6.55 b 7.52 0.61 0.18 0.20 0.00 1.27 7.75 9.14 24.10 57.32
1956 11.75 8.98 5.80 0.46 1.65 0.80 0.02 0.00 0.61 9.08 1.34 7.30 47.79
1957 4.73 6.08 7.63 2.34 3.14 0.62 0.22 0.09 1.70 5.34 5.28 15.55 52.72
1958 10.42 14.09 5.36 1.47 1.07 3.67 0.23 a 0.00 0.94 1.78 7.15 5.02 51.20
1959 13.97 8.41 4.78 0.37 1.74 0.62 0.00 0.00 2.49 2.66 2.38 4.57 41.99
1960 5.13 a 10.34 9.49 3.57 6.09 0.00 z 0.00 0.65 0.37 2.02 10.25 3.40 51.31
1961 3.78 12.01 10.03 1.65 2.73 0.00 z 0.00 z 0.17 l 0.71 8.02 13.52 8.01 60.46
1962 2.81 5.56 8.22 2.66 0.92 0.35 0.00 z 0.32 1.17 7.97 8.16 4.01 42.15
1963 1.57 6.79 6.51 7.53 5.31 1.54 0.00 0.00 2.12 3.26 9.88 4.95 49.46
1964 17.00 2.10 7.09 2.21 1.19 0.72 w 0.17 0.19 0.50 1.10 13.22 23.32 68.09
1965 12.00 2.62 1.72 3.04 1.52 0.18 0.15 0.79 0.00 2.88 7.36 10.33 42.59
1966 10.76 3.46 7.12 1.06 0.27 0.93 1.08 0.01 1.27 3.73 11.47 9.79 50.95
1967 10.96 2.42 4.58 3.58 1.07 0.11 0.00 0.00 1.09 5.05 3.39 8.98 41.23
1968 8.50 5.61 4.92 1.03 2.08 0.21 0.02 2.65 1.70 5.52 10.38 12.06 54.68
1969 12.74 3.19 2.98 2.34 1.03 1.13 0.00 0.00 1.44 3.72 2.73 16.00 47.30
1970 16.96 3.58 2.92 3.36 1.33 0.34 0.00 0.17 0.17 4.41 9.20 11.41 53.85
1971 11.76 8.21 9.65 4.96 2.00 1.50 0.00 0.65 3.71 2.76 12.03 12.79 70.02
1972 12.73 6.48 7.74 5.68 1.20 1.27 0.00 1.17 1.11 2.66 4.78 9.27 54.09
1973 7.47 2.04 4.29 1.86 0.39 0.49 0.00 0.26 2.95 3.16 22.65 13.84 59.40
1974 11.34 9.15 10.34 2.87 1.31 0.64 0.18 0.00 0.00 1.10 6.00 9.77 52.70
1975 9.72 9.97 8.95 3.12 1.28 0.37 0.18 1.11 0.21 7.40 8.21 8.94 59.46
1976 9.05 6.13 5.74 2.22 0.50 0.09 0.12 2.17 1.10 2.24 1.14 1.08 31.58
1977 1.68 4.47 6.67 0.82 3.43 0.19 0.00 1.87 3.88 2.26 12.31 11.24 48.82
1978 6.16 6.36 2.42 4.74 1.60 0.41 0.13 1.20 3.99 0.37 3.39 4.96 35.73
1979 5.34 10.39 2.77 5.64 3.49 0.63 0.00 0.84 1.21 6.90 7.34 7.22 51.77
1980 7.75 3.33 5.51 4.60 0.88 1.15 0.06 0.00 0.38 1.88 7.02 12.33 44.89
1981 3.23 4.74 4.22 2.55 2.39 1.71 0.05 0.10 2.89 6.69 7.97 21.02 57.56
1982 8.68 7.39 4.62 7.62 0.06 1.37 0.06 0.16 1.76 6.59 7.96 10.70 56.97
1983 7.79 13.99 11.11 4.17 2.03 1.56 0.72 2.47 0.13 1.54 15.25 11.78 72.54
1984 1.62 10.11 6.59 5.83 1.82 1.69 0.02 0.01 0.17 5.00 17.63 5.15 55.64
1985 0.47 4.82 6.19 1.73 1.09 1.69 0.26 0.03 1.69 4.48 5.22 4.88 32.55
1986 7.46 15.08 5.24 2.74 2.77 0.69 0.31 0.00 5.70 2.21 9.26 4.56 56.02
1987 9.30 4.07 4.68 1.26 0.66 0.02 0.62 0.19 0.05 0.27 5.48 13.27 39.87
1988 9.13 1.73 2.95 3.21 4.16 1.21 0.00 0.04 1.13 0.09 14.31 5.99 43.95
1989 7.07 3.90 7.97 1.65 2.21 0.38 0.26 0.83 0.96 3.53 4.83 1.92 35.51
1990 11.24 6.55 3.04 2.08 2.62 0.76 0.32 2.31 0.20 4.66 6.10 3.90 43.78
1991 3.23 3.89 6.92 4.10 2.89 0.56 0.43 0.13 0.00 2.96 6.99 5.37 37.47
1992 4.31 3.16 1.83 6.17 0.01 0.00 z 0.81 0.01 0.47 4.18 6.67 12.13 39.75
1993 6.95 4.33 4.42 7.21 5.08 0.95 0.63 0.54 0.00 0.91 3.83 9.23 44.08
1994 4.86 5.12 3.87 1.76 1.42 0.61 0.00 0.00 1.07 2.29 11.64 5.53 38.17
1995 15.63 2.76 a 6.89 5.50 1.55 2.76 0.94 0.08 0.99 1.64 7.87 13.17 59.78
1996 14.88 9.35 3.15 6.64 3.51 0.12 a 0.27 0.00 1.81 5.15 11.68 20.79 77.35
1997 7.11 0.64 z 7.01 b 2.94 2.79 0.93 0.06 1.17 2.69 5.33 5.03 3.93 a 38.99
1998 11.81 8.94 6.16 2.42 5.46 0.07 0.00 0.00 0.29 1.88 16.58 10.01 a 63.62
1999 8.92 13.49 5.59 1.97 2.44 0.00 0.00 0.55 0.00 3.81 7.30 5.23 49.30
2000 13.44 6.40 2.24 2.38 1.44 0.95 0.06 0.00 0.54 3.40 3.38 4.78 b 39.01
2001 1.96 2.04 2.66 1.86 1.25 0.58 0.23 0.18 0.31 1.85 9.33 10.18 32.43
2002 7.67 3.16 3.86 0.28 t 0.29 0.10 0.06 0.00 0.90 0.03 5.56 14.26 35.89
2003 6.08 2.44 4.69 4.47 0.70 0.00 0.00 0.00 1.06 0.59 7.00 0.00 z 27.03
2004 9.64 a 6.20 a 1.93 c 1.69 0.23 d 0.00 z 0.00 0.14 0.00 z 0.00 z 0.00 z 0.00 z 19.83
Period of Record Statistics
MEAN 8.43 6.27 5.44 3.31 1.99 0.84 0.22 0.43 1.33 3.52 8.59 9.20 49.24
S.D. 4.03 3.43 2.46 1.86 1.42 0.76 0.35 0.69 1.30 2.27 4.39 5.11 10.31
SKEW 0.07 0.76 0.32 0.76 1.01 1.51 2.50 1.88 1.43 0.51 0.83 1.07 0.52
MAX 17.00 15.08 11.11 7.62 6.09 3.67 1.87 2.65 5.70 9.08 22.65 24.10 77.35
MIN 0.47 1.10 1.55 0.37 0.01 0.00 0.00 0.00 0.00 0.03 1.14 1.08 31.58
NO YRS 57 56 58 57 59 54 57 57 57 57 57 56 47