SAINT HELENA, CALIFORNIA

Monthly Total Precipitation (inches)

(047643)

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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 0.00 z 1.50 i 3.02 0.85 1.31 0.78 0.00 0.00 0.00 2.26 2.50 14.38 25.10
1932 3.47 1.95 1.05 c 1.08 1.83 0.08 0.00 g 0.00 0.00 0.06 1.10 a 4.53 c 15.15
1933 7.86 1.17 4.52 0.07 2.03 0.00 0.00 0.00 0.11 2.72 0.00 8.98 27.46
1934 2.26 5.36 0.75 0.98 1.60 0.56 0.00 0.08 0.09 2.17 5.53 3.51 22.89
1935 8.92 2.51 6.51 6.24 0.00 0.00 0.00 0.25 0.02 1.32 1.22 3.26 30.25
1936 9.63 14.91 1.81 2.03 a 0.32 1.36 0.07 0.01 0.00 0.37 0.00 2.92 33.43
1937 5.45 10.61 6.46 1.35 0.05 0.77 0.16 0.00 0.00 0.90 5.94 8.24 39.93
1938 6.45 13.32 9.70 2.67 0.05 0.00 0.00 0.00 0.37 1.55 2.09 1.87 38.07
1939 4.39 1.73 2.96 0.17 1.04 0.00 0.00 0.00 0.00 0.21 0.41 3.31 14.22
1940 13.48 14.10 7.96 1.69 1.33 0.04 0.00 0.00 0.13 1.77 2.87 17.02 60.39
1941 11.72 9.83 6.39 6.06 1.39 0.49 0.00 0.03 0.04 1.58 3.43 12.11 53.07
1942 7.92 9.43 4.55 6.73 1.78 0.00 0.00 0.00 0.01 1.00 6.31 5.16 42.89
1943 11.92 2.18 3.34 2.54 0.02 0.05 0.00 0.00 0.00 0.72 1.27 2.50 24.54
1944 5.56 7.78 3.68 2.58 1.39 0.25 0.00 0.00 0.00 2.27 6.36 3.43 33.30
1945 3.14 6.53 4.68 0.47 1.19 0.00 0.00 0.00 0.00 5.32 5.81 11.79 38.93
1946 1.59 2.19 b 2.77 0.42 0.43 0.00 0.15 0.00 0.05 0.22 5.20 3.27 16.29
1947 1.22 3.76 6.07 0.51 0.45 1.28 0.00 0.00 0.00 5.96 0.74 1.22 21.21
1948 2.76 1.64 5.18 7.17 0.97 0.18 0.00 0.00 0.12 0.87 1.65 5.33 25.87
1949 2.71 3.74 7.41 0.02 0.42 0.00 0.02 0.13 0.00 0.00 2.89 3.02 20.36
1950 10.32 5.26 3.28 1.43 0.58 0.00 0.00 0.00 0.01 4.71 7.67 9.58 42.84
1951 6.77 3.31 1.77 1.52 1.35 0.00 0.00 0.03 0.05 2.93 6.27 10.09 34.09
1952 14.19 4.12 5.68 1.16 0.16 0.76 0.02 0.00 0.00 0.02 3.21 16.09 c 45.41
1953 7.86 0.07 4.94 4.02 b 1.28 0.48 0.00 0.13 0.00 1.13 5.03 0.51 j 24.94
1954 9.54 5.66 5.73 3.15 0.35 c 0.20 b 0.15 i 0.70 0.02 0.44 5.24 5.17 36.20
1955 3.31 2.09 b 0.57 3.81 0.00 0.02 0.00 g 0.00 c 0.53 0.27 3.08 24.32 38.00
1956 11.97 10.88 0.34 1.90 a 0.88 0.04 b 0.01 g 0.00 0.15 3.30 0.11 0.48 30.05
1957 3.40 b 8.22 3.28 2.40 4.53 b 0.50 b 0.00 0.00 1.70 5.53 a 1.19 5.70 36.45
1958 8.98 15.74 8.59 6.90 0.86 0.93 0.49 0.00 0.04 0.08 0.27 2.43 45.31
1959 8.90 1.33 o 1.54 c 0.44 0.10 k 0.00 a 0.00 0.00 b 3.66 0.00 f 0.03 2.45 17.02
1960 7.14 11.51 d 5.66 1.81 1.01 0.00 0.00 0.00 d 0.01 b 0.67 e 4.69 3.63 36.13
1961 5.89 e 2.78 3.54 g 2.13 0.25 0.28 i 0.00 c 0.15 0.37 0.14 c 4.88 5.75 22.34
1962 2.71 13.52 5.41 0.38 0.26 0.00 0.00 0.04 0.23 11.77 1.07 5.38 40.77
1963 8.58 4.63 6.07 6.24 0.57 0.00 0.00 0.02 0.01 1.84 8.00 0.74 36.70
1964 5.32 0.15 2.69 0.11 0.48 0.75 0.04 0.00 0.00 2.18 6.81 14.22 32.75
1965 9.63 1.24 1.33 4.59 0.00 0.00 0.02 0.82 0.00 0.05 7.76 5.41 30.85
1966 9.03 3.87 0.90 0.81 0.12 0.08 0.05 0.32 0.23 0.00 9.83 7.13 32.37
1967 16.91 0.38 7.13 5.01 0.24 1.89 0.00 0.00 0.10 0.92 2.41 4.59 39.58
1968 11.55 4.80 3.85 0.55 0.47 0.00 0.00 0.81 0.00 2.92 3.68 10.58 39.21
1969 17.13 10.82 1.58 2.34 0.08 0.11 0.00 0.00 0.00 2.80 1.32 13.56 49.74
1970 19.75 3.29 2.92 0.22 0.05 0.35 0.00 0.00 0.00 1.99 11.96 13.82 54.35
1971 3.20 0.26 5.49 0.90 0.37 0.00 0.00 0.00 0.29 0.37 2.71 7.81 21.40
1972 2.36 3.74 0.80 2.42 0.10 0.13 0.00 0.00 0.65 3.48 7.21 4.51 25.40
1973 17.32 8.35 3.61 0.05 0.04 0.00 0.00 0.01 0.50 2.62 15.25 5.69 53.44
1974 6.49 4.49 8.32 2.02 0.05 0.00 1.08 0.10 0.00 1.42 1.27 4.58 29.82
1975 2.58 11.86 10.22 2.00 0.05 0.00 0.21 0.04 0.00 4.20 0.98 0.81 32.95
1976 0.48 2.43 1.04 2.05 0.00 0.08 0.00 0.80 0.62 0.26 1.26 1.39 10.41
1977 2.55 2.65 2.81 0.16 1.11 0.00 0.00 0.00 1.10 0.46 7.08 4.51 22.43
1978 18.00 7.25 6.68 3.31 0.09 0.00 0.00 0.00 1.23 0.00 2.08 0.71 39.35
1979 12.15 7.95 3.17 2.12 0.94 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 26.33
1980 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.46 9.48 a 9.94
1981 0.00 z 2.72 4.19 0.33 0.00 z 0.00 z 0.00 0.00 0.32 3.89 10.98 12.20 34.63
1982 8.00 7.21 9.29 6.82 0.00 0.06 0.00 0.00 z 1.95 4.55 10.36 5.41 53.65
1983 11.23 16.98 14.53 4.15 0.54 0.00 0.00 0.32 0.48 1.38 12.53 13.26 75.40
1984 0.54 3.14 1.53 1.13 0.17 0.09 0.00 0.23 0.00 z 2.04 0.00 z 0.00 z 8.87
1985 1.47 4.83 4.98 0.26 0.00 z 0.00 z 0.00 0.00 0.87 1.20 7.51 a 4.13 25.25
1986 0.00 z 25.60 0.00 z 0.65 0.00 z 0.00 0.00 0.00 1.85 0.12 0.12 2.10 30.44
1987 0.00 z 5.38 4.86 0.14 0.00 0.00 z 0.00 z 0.00 z 0.00 0.00 z 0.00 z 0.00 z 10.38
1988 0.00 z 0.00 z 0.00 z 2.42 0.84 0.46 0.00 z 0.00 0.00 0.08 5.75 4.71 14.26
1989 1.35 1.04 10.60 0.42 0.03 0.05 0.00 0.00 1.80 3.36 1.96 0.00 20.61
1990 6.70 3.83 1.51 0.23 0.00 z 0.00 0.00 0.00 0.21 0.60 0.56 0.48 14.12
1991 0.73 5.37 16.38 0.27 0.12 0.64 0.00 z 0.09 0.00 2.07 1.52 a 2.80 a 29.99
1992 2.83 b 9.38 5.63 0.94 0.00 1.01 0.00 0.00 z 0.00 3.42 0.70 14.53 38.44
1993 13.13 a 7.66 b 3.02 1.92 d 1.65 1.35 0.00 0.00 0.00 1.22 2.84 a 4.51 37.30
1994 2.77 4.74 0.34 2.23 1.49 0.00 0.00 0.00 0.00 1.05 7.03 4.08 23.73
1995 23.30 0.82 16.83 1.83 2.55 0.36 0.00 0.00 0.00 0.00 0.15 11.77 57.61
1996 11.25 11.35 3.02 3.03 4.06 0.00 0.00 0.00 0.00 1.06 4.97 14.14 52.88
1997 14.76 b 0.47 1.05 0.66 0.00 b 0.12 0.00 0.73 0.12 1.38 8.04 3.47 30.80
1998 11.54 17.03 3.19 3.63 a 0.00 z 0.00 0.00 z 0.00 0.03 0.00 z 7.17 b 2.57 45.16
1999 3.42 12.01 4.76 2.98 0.02 0.23 0.00 0.00 0.00 2.08 3.66 0.00 z 29.16
2000 6.82 13.34 2.60 1.67 1.36 0.20 0.00 0.00 0.00 4.81 1.38 0.91 33.09
2001 5.58 8.19 2.99 0.66 0.00 0.00 0.00 0.00 0.29 0.80 7.76 13.57 39.84
2002 5.36 1.07 3.63 0.00 1.49 0.00 0.00 0.00 0.00 0.00 4.80 22.12 a 38.47
2003 3.74 3.87 3.13 7.43 1.44 0.00 0.00 0.20 0.00 a 0.06 4.15 12.76 a 36.78
2004 4.07 a 10.83 b 1.62 b 0.10 0.71 0.00 0.00 0.00 0.03 4.53 3.32 8.49 a 33.70
2005 0.00 z 5.04 6.92 1.77 4.89 a 0.64 0.00 0.00 0.00 1.17 2.74 20.59 43.76
2006 5.77 a 5.32 a 11.84 6.10 0.52 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 29.55
Period of Record Statistics
MEAN 7.52 6.41 4.76 2.15 0.81 0.25 0.04 0.09 0.28 1.84 4.14 7.07 35.67
S.D. 5.15 5.05 3.54 2.05 1.01 0.41 0.15 0.21 0.61 1.98 3.43 5.60 12.48
SKEW 0.83 1.15 1.43 1.15 2.20 1.97 5.86 2.75 3.30 2.18 0.92 1.03 0.61
MAX 23.30 25.60 16.83 7.43 4.89 1.89 1.08 0.82 3.66 11.77 15.25 24.32 75.40
MIN 0.48 0.07 0.34 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10.41
NO YRS 69 72 72 75 69 69 65 70 72 70 72 70 52