MANASSAS, VIRGINIA

Monthly Total Precipitation (inches)

(445213)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 198507
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
1895 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 5.44 t 5.92 x 0.85 0.84 w 1.80 1.14 2.37 y 3.79
1896 2.69 z 5.11 t 4.25 x 1.29 x 5.41 t 4.68 q 3.73 r 2.63 y 2.67 v 0.24 2.47 t 0.10 0.34
1897 5.00 6.49 r 2.99 s 2.09 4.95 x 7.19 v 4.14 u 0.00 z 0.80 z 2.42 z 4.34 v 3.33 w 7.09
1898 2.79 w 1.22 2.93 1.56 3.89 w 1.10 3.06 x 5.92 v 1.20 5.48 v 1.86 w 2.91 10.92
1899 3.26 v 5.65 4.14 v 1.57 y 2.06 s 1.11 w 1.57 u 4.89 u 4.60 w 2.60 1.28 z 1.96 x 8.25
1900 2.24 y 3.71 1.36 1.29 1.79 5.92 4.70 0.83 3.28 1.67 2.48 1.80 28.83
1901 2.23 0.38 1.29 5.65 4.07 3.25 5.80 4.81 1.69 0.10 2.44 7.77 39.48
1902 1.90 4.24 3.25 2.50 1.35 2.23 2.74 1.09 2.95 5.08 3.22 4.44 34.99
1903 4.27 6.10 6.28 4.12 4.02 3.13 3.30 4.92 1.50 4.27 0.00 z 0.00 z 41.91
1904 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
1905 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
1906 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
1907 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
1908 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
1909 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
1910 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
1911 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
1912 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
1913 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
1914 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
1915 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
1916 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
1917 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
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 2.44 y 0.00
1921 0.00 z 1.50 v 3.13 2.44 6.38 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 4.36 1.80 18.11
1922 5.49 3.45 4.16 0.82 4.85 4.56 2.20 w 3.30 x 3.52 2.23 z 0.67 x 3.81 y 26.85
1923 3.11 s 1.72 s 4.14 v 3.75 u 2.19 y 2.79 t 3.01 r 3.38 4.34 s 1.55 z 2.50 v 2.59 v 3.38
1924 3.63 y 2.81 t 4.66 w 4.26 v 7.98 o 2.17 r 0.96 z 5.11 y 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1925 0.00 z 0.80 1.38 2.53 2.13 3.14 3.98 2.50 0.51 4.47 2.59 0.99 z 24.03
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 5.43 3.02 5.25 4.54 a 2.93 2.05 b 23.22
1951 2.10 2.58 3.81 4.31 2.98 8.55 2.39 1.94 2.58 0.95 4.98 4.24 41.41
1952 4.76 1.71 3.96 4.76 5.83 2.18 4.98 4.24 4.68 0.62 6.94 a 3.91 48.57
1953 3.74 1.99 4.63 4.02 5.53 2.74 2.56 3.34 2.25 3.44 1.21 3.43 38.88
1954 1.67 1.11 2.41 a 2.87 2.88 0.71 3.31 a 6.16 0.93 3.56 1.31 3.05 29.97
1955 0.31 3.02 4.43 2.52 6.34 2.81 2.10 13.54 0.84 4.24 1.67 1.50 43.32
1956 2.26 2.83 3.99 2.24 1.61 5.05 9.77 3.91 5.75 3.44 2.33 2.66 45.84
1957 2.55 2.91 2.10 3.38 1.72 3.36 3.71 2.09 5.12 3.54 3.24 6.00 39.72
1958 3.63 2.84 5.23 3.57 2.40 5.08 6.46 4.18 1.59 2.05 1.69 1.44 40.16
1959 2.24 1.16 a 2.07 4.25 2.89 2.24 5.90 3.54 4.32 4.67 3.15 2.36 38.79
1960 1.47 a 4.15 2.49 3.78 6.34 2.31 3.12 3.48 5.21 1.46 1.04 2.54 37.39
1961 1.91 3.34 3.39 3.05 3.75 2.42 4.03 4.05 1.50 2.82 2.14 2.94 35.34
1962 2.52 3.71 6.00 5.00 5.14 1.91 2.30 0.88 2.33 1.01 6.10 3.27 40.17
1963 0.00 z 1.60 4.75 0.64 0.87 4.92 1.47 3.44 2.88 0.00 z 6.83 2.38 29.78
1964 4.46 4.83 2.64 3.88 0.76 0.69 1.95 b 0.97 4.51 2.27 a 1.86 3.41 32.23
1965 3.10 2.60 2.54 2.12 2.20 2.44 2.91 4.38 2.20 1.72 0.65 0.26 27.12
1966 3.52 2.98 1.28 3.63 3.67 2.05 1.20 2.12 9.76 3.98 1.76 3.42 39.37
1967 0.84 0.73 b 4.08 1.03 4.50 1.33 4.37 9.35 0.12 h 3.14 2.46 4.67 36.50
1968 2.60 0.32 3.46 0.35 4.16 4.80 1.65 2.33 1.65 2.65 0.95 b 1.10 26.02
1969 1.95 0.97 0.95 0.94 0.30 2.52 3.55 4.25 4.45 0.80 1.48 3.69 25.85
1970 2.56 2.91 2.30 3.95 2.39 3.38 7.03 1.30 1.57 3.39 5.46 3.03 39.27
1971 0.00 4.73 1.16 1.50 9.08 1.49 1.55 3.54 2.04 2.75 0.91 0.90 29.65
1972 0.00 z 1.93 3.08 4.40 3.93 12.15 2.51 0.49 f 1.51 3.31 6.06 3.51 42.39
1973 2.98 1.91 2.09 5.99 b 3.51 1.69 2.53 4.70 2.74 2.68 0.83 5.35 37.00
1974 2.26 1.11 1.82 2.45 2.80 5.50 0.65 4.04 3.85 0.75 1.57 j 5.59 30.82
1975 2.39 1.00 0.00 z 2.06 2.49 5.40 5.47 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 18.81
1976 0.00 z 0.00 z 0.00 z 0.00 z 2.76 0.00 z 1.00 1.01 3.23 b 5.66 0.25 0.00 z 13.91
1977 0.60 0.00 b 0.15 c 2.49 0.45 f 1.34 2.92 2.92 1.39 0.00 z 4.60 5.78 22.19
1978 0.00 z 0.43 2.52 0.85 a 5.53 2.69 3.11 1.83 0.10 a 0.00 z 1.72 2.61 21.39
1979 1.17 e 5.21 a 0.10 h 1.37 c 2.22 b 5.28 1.67 4.00 10.17 4.74 1.27 b 0.72 37.82
1980 2.44 a 1.44 2.13 a 3.30 3.84 2.88 4.79 1.36 0.96 1.86 2.05 e 0.53 27.58
1981 0.30 2.24 0.05 b 1.35 g 3.34 a 2.89 0.00 z 2.60 l 1.58 2.31 0.21 0.00 z 12.92
1982 2.18 0.00 z 2.91 2.42 0.00 z 3.72 3.49 1.76 2.04 0.00 z 0.00 z 0.00 z 18.52
1983 0.00 z 0.00 z 0.00 z 6.01 2.49 1.14 0.00 z 0.95 2.87 0.00 z 2.05 j 2.11 i 13.46
1984 1.17 b 3.78 c 2.71 c 2.63 d 2.06 d 0.00 z 0.00 z 4.86 b 0.00 z 0.54 a 3.49 b 0.00 z 21.24
1985 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1.27 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1.27
Period of Record Statistics
MEAN 2.43 2.50 2.87 2.90 3.46 3.36 3.47 3.38 2.99 2.68 2.64 3.00 36.44
S.D. 1.36 1.58 1.46 1.48 1.84 2.22 1.92 2.42 2.19 1.49 1.85 1.76 6.32
SKEW 0.36 0.43 0.31 0.29 0.78 1.90 1.07 2.19 1.64 0.03 0.93 0.53 -0.22
MAX 5.49 6.10 6.28 6.01 9.08 12.15 9.77 13.54 10.17 5.66 6.94 7.77 48.57
MIN 0.00 0.00 0.05 0.35 0.30 0.69 0.65 0.83 0.10 0.10 0.21 0.10 25.85
NO YRS 34 39 38 41 39 39 38 39 39 37 37 35 23