MAUNA LOA SLOPE OBS, HAWAII

Monthly Total Precipitation (inches)

(516198)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1955 1.50 S 3.05 S 3.10 1.05 1.46 S 0.02 0.85 0.15 0.00 0.76 1.62 6.71 20.27
1956 12.89 4.28 2.93 0.92 1.76 o 0.40 4.25 2.70 0.82 1.98 S 4.01 0.00 35.18
1957 0.29 S 1.12 0.00 0.45 0.46 0.68 S 0.21 S 6.41 5.00 1.68 0.43 3.83 20.56
1958 0.00 0.02 2.15 0.31 0.62 0.01 3.20 4.00 1.83 2.32 0.49 0.50 15.45
1959 10.33 3.51 0.11 0.88 0.00 0.00 f 0.33 5.76 2.82 2.18 2.82 0.28 29.02
1960 0.30 2.11 2.15 0.90 S 1.25 2.31 0.04 0.71 0.33 1.20 0.69 1.63 13.62
1961 0.17 1.26 0.63 0.77 1.02 0.07 0.34 1.00 0.67 3.32 2.91 3.13 15.29
1962 1.24 0.13 2.14 1.78 2.15 0.49 0.03 0.64 o 2.10 c 0.05 0.04 0.10 10.25
1963 2.86 0.73 4.36 6.47 4.14 0.87 1.98 1.81 1.68 0.18 0.17 0.00 25.25
1964 0.32 0.27 2.45 0.82 2.40 0.11 1.09 1.03 1.26 0.88 1.20 2.45 14.28
1965 1.58 0.75 1.03 2.74 5.84 0.86 1.88 0.19 3.17 0.36 2.76 0.41 21.57
1966 0.20 4.11 0.61 1.56 0.59 0.00 0.70 1.80 4.74 3.20 1.71 2.63 21.85
1967 0.46 0.34 4.13 2.06 2.75 1.84 3.66 2.31 1.33 1.67 4.57 2.99 28.11
1968 1.61 1.54 3.60 4.43 1.59 1.42 1.36 2.14 4.46 2.21 1.55 7.12 33.03
1969 5.29 1.45 1.36 0.97 0.65 0.02 0.25 1.00 0.39 0.58 0.08 0.32 12.36
1970 1.79 0.00 0.02 1.46 1.51 0.02 0.16 2.75 0.11 0.36 3.15 1.87 13.20
1971 6.97 0.25 0.77 3.67 0.49 0.33 1.40 0.11 0.46 0.81 2.55 0.40 18.21
1972 1.93 1.24 2.48 1.41 1.38 0.55 2.01 1.34 0.86 1.67 0.16 3.90 18.93
1973 0.01 0.00 1.66 0.00 0.93 0.00 1.78 0.76 1.51 0.60 4.66 4.66 16.57
1974 1.67 0.26 3.52 2.23 1.97 0.44 0.93 0.00 1.79 3.01 2.05 5.45 23.32
1975 7.15 2.65 0.80 0.76 0.00 0.16 0.16 0.28 0.11 0.24 1.36 0.34 14.01
1976 5.35 1.62 4.49 0.82 0.66 0.00 0.21 0.11 0.87 0.64 0.00 z 0.09 14.86
1977 0.00 0.66 b 0.35 3.61 0.85 0.05 0.21 1.83 0.79 1.04 0.20 0.38 S 9.97
1978 0.01 0.00 0.41 1.15 2.77 1.43 1.25 2.50 0.44 0.32 7.31 0.52 18.11
1979 5.61 8.49 0.61 1.05 0.14 1.19 0.28 2.35 0.43 4.52 5.63 0.13 30.43
1980 11.55 1.00 15.57 0.40 1.06 0.21 1.06 0.31 2.37 0.47 0.12 0.67 34.79
1981 0.00 0.20 0.58 0.41 0.16 0.02 0.00 2.81 1.80 0.00 1.01 S 6.73 13.72
1982 7.81 c 10.12 c 12.49 g 2.21 b 0.64 e 0.62 b 4.73 d 5.54 g 1.36 d 0.34 b 1.68 b 1.32 e 30.83
1983 0.00 0.00 0.00 0.33 b 0.14 2.49 b 0.05 0.78 b 0.54 d 0.36 d 0.02 j 1.41 c 6.10
1984 0.40 c 0.30 c 0.35 0.25 c 0.26 0.00 0.39 h 0.47 0.70 c 0.67 1.55 h 1.45 g 3.40
1985 0.58 2.62 c 4.03 f 0.53 h 1.23 c 0.07 0.79 a 1.53 b 0.16 0.92 e 2.04 b 0.23 10.17
1986 0.00 0.79 c 0.77 d 9.41 d 1.30 b 0.17 a 1.84 2.89 d 4.07 g 0.10 b 2.61 a 0.41 b 20.29
1987 0.08 c 1.11 c 0.29 0.18 1.76 d 1.26 f 1.20 0.01 2.97 g 2.43 b 0.45 b 16.54 d 24.05
1988 2.76 e 0.03 c 1.84 c 1.76 d 0.00 0.76 0.00 1.76 b 0.25 c 1.34 f 3.87 h 1.37 g 9.16
1989 2.58 h 2.87 d 1.52 f 3.63 j 5.04 i 1.37 b 3.87 d 0.73 f 0.48 c 2.42 g 0.01 1.16 d 9.76
1990 12.78 h 3.02 f 0.33 h 0.07 0.04 0.01 0.97 d 0.80 b 1.05 i 0.78 a 10.32 h 6.79 e 9.46
1991 4.67 d 1.04 c 2.77 f 0.31 b 0.00 0.45 0.49 2.26 x 1.07 v 0.17 0.00 b 0.43 a 7.56
1992 0.04 0.34 0.00 0.00 0.00 0.00 2.77 b 3.57 f 4.57 d 0.52 b 4.17 e 0.86 c 13.27
1993 5.72 h 0.04 b 0.30 b 0.00 0.03 c 0.00 5.39 g 0.84 c 1.47 d 2.03 f 0.04 0.51 b 3.23
1994 2.69 b 3.22 b 3.42 b 0.00 a 0.31 c 0.42 d 2.08 g 2.51 b 3.42 f 0.41 b 2.51 e 0.00 15.49
1995 0.51 e 1.25 b 0.39 b 0.33 0.35 g 0.08 0.33 b 0.51 f 0.00 a 0.65 a 1.25 e 0.00 b 4.79
1996 3.71 g 4.68 g 5.63 d 0.12 0.00 1.40 f 2.49 f 0.08 b 0.38 b 1.15 b 3.77 f 1.22 e 8.58
1997 3.33 e 0.97 a 3.16 f 1.23 b 0.09 0.87 b 2.72 b 1.23 d 1.90 e 1.38 c 2.06 c 0.00 15.78
1998 0.32 0.03 0.00 0.02 0.13 0.03 0.21 b 0.73 d 0.17 c 0.70 c 0.57 d 0.02 b 2.93
1999 0.70 i 1.24 b 0.14 d 0.85 d 0.33 e 1.33 0.07 0.00 0.07 2.03 0.26 2.54 e 8.86
2000 0.27 e 0.31 0.08 b 0.01 0.02 c 0.12 b 0.05 b 1.26 f 1.38 f 3.10 c 5.07 f 0.00 3.96
2001 0.01 c 1.64 b 0.07 a 0.31 e 0.54 0.93 e 1.09 c 0.28 b 0.78 e 0.38 b 5.45 b 4.46 d 15.94
2002 4.32 e 1.09 d 0.23 d 1.70 b 8.60 i 0.01 1.35 d 1.49 c 1.51 d 0.88 d 0.00 0.04 12.62
2003 0.18 c 1.28 c 0.51 d 1.05 d 0.57 b 0.56 d 1.22 b 0.41 d 3.58 c 0.12 e 0.63 c 4.30 f 10.11
2004 2.78 f 0.67 e 7.66 f 2.63 h 2.80 b 0.12 e 0.97 b 1.80 d 0.40 e 2.33 f 1.17 c 0.69 a 8.62
2005 6.29 f 2.68 d 1.06 d 0.48 b 0.00 0.39 b 0.27 b 2.25 d 0.94 0.23 h 0.22 0.42 8.71
2006 2.38 b 0.96 e 6.46 h 0.27 b 1.80 d 0.08 b 0.42 b 1.70 f 0.40 c 0.73 c 0.28 0.54 b 7.86
2007 0.61 b 0.75 g 0.84 c 0.00 0.86 b 0.00 a 1.96 c 1.21 a 0.77 h 0.69 b 1.58 e 5.24 k 7.75
2008 0.39 b 2.54 d 0.43 b 2.53 g 0.00 0.23 b 0.83 1.43 b 0.02 a 0.33 c 0.24 d 4.02 d 10.46
2009 0.27 c 1.06 b 3.04 d 1.54 d 0.08 d 0.06 1.44 f 1.24 h 0.00 1.09 d 0.88 f 0.30 b 7.44
2010 0.00 0.06 0.10 b 0.61 b 0.00 c 0.01 0.00 0.00 0.01 0.10 0.15 b 2.21 h 1.04
2011 0.67 0.38 1.37 1.07 S 1.59 0.75 0.09 S 1.63 0.50 0.05 0.77 a 2.48 S 11.35
2012 0.00 e 1.00 d 1.05 0.45 0.00 0.00 S 0.02 1.54 b 0.04 S 0.83 1.08 0.13 S 6.14
2013 0.56 1.04 0.01 n 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1.60
Period of Record Statistics
MEAN 2.19 1.46 1.68 1.25 0.95 0.46 1.09 1.47 1.22 1.08 1.65 1.96 18.12
S.D. 3.15 1.88 2.47 1.67 1.15 0.60 1.18 1.36 1.33 1.01 1.72 2.90 7.61
SKEW 1.83 2.81 3.78 2.97 2.00 1.64 1.40 1.63 1.48 1.39 1.32 2.82 0.42
MAX 12.89 10.12 15.57 9.41 5.84 2.49 4.73 6.41 5.00 4.52 7.31 16.54 34.79
MIN 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2.93
NO YRS 52 56 50 54 54 55 53 49 51 53 50 53 27