BELTSVILLE, MARYLAND

Monthly Total Precipitation (inches)

(180700)

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
1941 0.00 z 0.00 z 0.00 z 0.00 z 1.31 4.92 5.22 3.77 0.45 1.02 1.11 0.00 z 17.80
1942 0.00 z 0.00 z 0.00 z 0.55 a 2.91 3.71 4.13 10.63 2.44 9.85 1.72 0.00 z 35.94
1943 0.00 z 0.00 z 0.00 z 2.67 4.06 3.09 1.25 1.44 2.92 4.57 3.72 3.49 27.21
1944 0.00 z 0.00 z 0.00 z 0.00 z 1.19 1.89 1.82 6.58 6.31 3.15 3.35 0.00 z 24.29
1945 0.00 z 0.00 z 0.00 z 2.69 4.72 4.15 15.50 3.28 4.83 1.24 4.02 0.00 z 40.43
1946 0.00 z 0.00 z 0.00 z 1.75 6.35 2.04 3.35 4.11 4.32 2.86 1.21 0.00 z 25.99
1947 0.00 z 0.00 z 0.00 z 2.15 6.73 7.34 3.55 6.08 3.13 1.69 5.56 1.48 37.71
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 7.87 2.56 3.81 5.58 5.07 24.89
1949 4.96 3.70 2.72 2.23 4.83 a 2.79 3.68 3.75 3.54 3.09 1.26 2.14 a 38.69
1950 1.75 3.04 3.46 1.15 5.02 4.32 5.42 6.30 a 7.09 3.13 3.08 a 3.44 47.20
1951 1.71 2.85 2.64 3.06 2.23 11.32 3.06 1.18 2.58 1.53 5.42 3.97 41.55
1952 4.33 2.07 3.67 6.94 5.78 3.23 2.57 5.37 6.06 0.85 6.56 2.89 50.32
1953 3.98 2.37 6.76 3.60 6.66 1.87 2.19 2.62 4.07 3.47 1.40 3.26 42.25
1954 1.84 0.85 3.59 3.32 2.68 3.17 2.36 4.86 1.21 3.31 2.30 2.62 32.11
1955 0.18 2.84 3.20 2.53 1.99 6.08 1.94 16.15 0.97 6.15 1.22 0.13 43.38
1956 2.41 2.99 3.90 1.44 a 2.38 4.67 5.47 1.72 3.37 3.25 3.21 3.24 38.05
1957 2.54 2.51 3.01 2.98 2.11 4.27 1.71 3.25 4.21 2.86 3.05 5.47 37.97
1958 2.96 3.44 5.47 5.31 2.85 4.34 9.24 5.69 1.35 2.49 2.43 1.58 47.15
1959 2.39 1.99 2.54 5.13 2.27 3.15 5.07 3.65 1.04 3.76 2.54 3.42 36.95
1960 2.59 4.32 1.66 3.33 5.64 1.47 5.38 4.75 6.61 1.43 1.50 2.19 40.87
1961 2.28 4.19 3.77 4.71 2.77 3.75 3.28 5.76 0.82 3.28 2.02 2.95 39.58
1962 1.76 3.39 2.85 3.34 1.61 4.17 1.67 a 0.05 2.85 2.42 6.03 2.67 32.81
1963 1.47 1.76 4.85 1.36 1.77 5.42 1.05 8.26 3.70 0.02 6.01 1.61 a 37.28
1964 1.85 b 1.98 1.78 a 4.44 1.04 1.78 1.25 2.40 3.98 1.63 1.96 3.75 27.84
1965 2.70 2.22 4.84 1.67 1.88 1.27 2.93 4.17 2.15 2.15 0.63 0.71 27.32
1966 3.29 2.82 1.88 3.74 4.51 2.05 0.51 1.41 8.69 4.95 2.05 2.79 38.69
1967 0.92 1.43 4.06 1.28 4.64 0.69 5.15 9.39 0.55 1.71 1.11 6.50 37.43
1968 2.71 0.41 4.11 1.43 5.34 5.59 5.64 2.28 4.10 2.88 3.88 2.14 b 40.51
1969 1.66 1.55 1.25 1.74 2.98 4.01 8.41 9.27 1.54 1.14 2.15 6.43 42.13
1970 0.99 2.17 2.84 4.58 2.92 2.79 6.20 3.43 1.52 3.19 5.31 3.10 39.04
1971 2.08 5.59 2.22 2.64 7.59 2.95 5.05 8.51 6.07 7.26 4.01 1.82 55.79
1972 2.85 5.72 2.77 5.82 5.74 10.29 3.60 1.91 1.25 5.50 6.15 7.58 59.18
1973 2.74 2.97 3.66 7.66 4.19 4.74 3.13 2.18 3.61 2.53 1.09 5.88 44.38
1974 3.58 0.97 3.86 2.32 3.64 5.06 2.43 6.27 5.04 1.20 1.43 5.40 41.20
1975 3.00 a 2.05 4.99 2.10 5.10 5.36 9.78 4.08 15.45 3.41 2.01 2.58 59.91
1976 5.28 1.83 1.86 2.30 6.51 2.01 3.71 4.16 3.90 a 8.26 0.69 1.63 42.14
1977 1.40 0.47 3.12 2.71 2.21 2.60 5.89 2.06 0.61 6.34 4.41 7.64 39.46
1978 7.86 0.55 4.18 1.15 7.36 1.98 4.03 6.65 1.36 0.90 2.80 4.02 42.84
1979 9.52 5.82 2.85 2.90 3.25 4.38 4.43 7.58 7.53 6.30 2.95 1.45 58.96
1980 2.25 b 0.89 5.28 b 5.15 4.75 2.12 7.02 2.19 1.03 2.91 2.79 0.85 37.23
1981 0.46 3.50 1.24 2.35 5.28 2.86 3.38 3.20 3.41 3.02 0.65 2.51 31.86
1982 2.90 a 3.87 2.56 c 4.17 2.18 4.96 2.61 1.72 2.72 2.31 3.00 1.49 a 34.49
1983 1.47 2.17 b 6.07 7.67 5.22 a 8.22 0.62 3.43 2.96 d 5.49 5.43 6.49 55.24
1984 1.43 4.07 5.46 3.08 6.56 1.36 6.20 1.74 1.60 3.14 a 4.08 1.64 40.36
1985 2.10 3.67 2.25 0.60 4.57 1.95 5.04 2.51 4.57 b 2.75 4.75 0.90 35.66
1986 2.26 3.75 a 0.77 3.24 0.69 2.18 2.75 4.88 1.05 2.48 5.96 5.49 35.50
1987 3.42 1.35 a 0.92 4.01 3.59 2.69 1.58 1.76 7.32 3.07 3.82 2.98 36.51
1988 2.60 a 3.00 2.34 2.83 6.24 0.88 3.72 5.26 a 2.11 1.74 5.35 1.26 37.33
1989 2.83 3.25 b 4.68 3.33 9.33 5.46 6.87 0.83 5.11 5.43 2.61 0.74 50.47
1990 4.18 b 1.45 3.02 4.75 6.01 1.32 4.71 7.01 0.89 3.62 2.01 5.33 44.30
1991 3.03 0.88 5.94 2.09 2.32 1.98 4.41 3.27 2.59 3.36 b 1.59 4.95 36.41
1992 2.01 2.42 4.15 3.26 4.31 a 1.33 4.88 a 2.19 a 5.61 1.77 4.32 3.57 39.82
1993 3.00 2.45 8.30 b 4.39 b 3.59 2.16 1.11 6.20 b 4.86 a 2.96 b 5.49 5.32 c 49.83
1994 4.48 3.75 8.54 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 16.77
1995 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 7.74 5.00 1.98 14.72
1996 4.90 2.10 3.65 2.77 5.57 6.65 4.97 a 3.08 7.87 4.57 b 3.99 6.18 56.30
1997 3.06 1.65 a 5.14 2.31 b 2.46 4.06 1.25 2.66 1.72 3.48 5.45 1.88 35.12
1998 5.10 4.49 6.15 3.67 5.43 4.14 1.93 0.52 2.37 0.86 1.16 1.32 37.14
1999 5.15 2.08 3.90 2.29 1.75 2.14 1.11 4.26 12.13 2.76 1.92 1.32 b 40.81
2000 3.94 2.15 3.86 3.80 2.41 4.99 6.14 3.68 5.91 0.15 1.32 2.63 40.98
2001 2.17 a 1.90 3.69 1.87 5.08 5.29 7.17 4.08 3.43 1.00 0.65 1.45 37.78
2002 1.21 0.32 2.79 3.40 2.77 2.17 2.14 2.71 4.01 5.77 3.77 4.83 a 35.89
2003 2.44 c 6.30 a 4.06 2.50 6.88 7.29 7.12 4.05 8.47 5.96 3.96 4.06 63.09
2004 1.61 2.27 1.92 4.29 3.10 4.35 12.92 3.24 4.33 1.38 4.01 3.07 46.49
2005 3.75 a 1.07 4.68 3.41 4.10 3.07 6.18 3.66 0.19 a 10.04 1.87 a 3.29 45.31
2006 2.81 1.82 0.02 3.87 2.12 8.07 3.59 0.52 6.18 5.22 4.22 1.69 40.13
2007 2.37 2.31 3.14 a 4.44 0.95 2.21 0.92 2.45 1.32 5.88 1.43 3.10 30.52
2008 1.21 2.60 a 2.26 5.57 7.22 4.58 4.22 0.99 4.19 1.75 1.38 3.80 39.77
2009 3.02 0.26 2.28 5.06 8.81 7.50 1.88 4.71 3.07 5.47 4.85 6.03 52.94
2010 1.49 3.02 3.99 1.77 2.93 2.54 4.08 6.65 4.09 5.01 2.36 1.56 39.49
2011 2.12 1.90 4.74 3.49 2.52 2.79 2.78 12.45 9.80 4.42 1.95 4.75 53.71
2012 2.37 0.76 3.08 2.02 0.10 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 8.23
Period of Record Statistics
MEAN 2.81 2.51 3.58 3.23 4.05 3.82 4.18 4.33 3.89 3.49 3.12 3.25 42.02
S.D. 1.58 1.37 1.65 1.54 2.02 2.18 2.75 2.92 2.84 2.15 1.69 1.83 8.01
SKEW 1.78 0.67 0.66 0.82 0.44 1.20 1.59 1.47 1.49 0.97 0.33 0.58 0.80
MAX 9.52 6.30 8.54 7.67 9.33 11.32 15.50 16.15 15.45 10.04 6.56 7.64 63.09
MIN 0.18 0.26 0.02 0.55 0.69 0.69 0.51 0.05 0.19 0.02 0.63 0.13 27.32
NO YRS 63 63 63 67 68 68 68 69 69 70 70 65 61