YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 91.93 | 79.74 | 61.10 | 54.73 | a | 71.88 | h | |||
1995 | 60.35 | 62.18 | 67.35 | 73.92 | d | 78.96 | d | 89.33 | 96.13 | 98.07 | a | 93.73 | 84.03 | b | 71.93 | a | 62.20 | a | 78.18 | |||||||
1996 | 58.77 | a | 64.90 | 72.03 | 79.57 | 85.66 | b | 93.30 | 101.47 | a | 100.27 | a | 90.27 | 79.61 | 65.90 | 58.53 | a | 79.19 | ||||||||
1997 | 58.84 | 62.12 | d | 74.26 | 77.43 | 89.42 | 91.07 | 95.70 | a | 95.97 | 91.76 | a | 79.76 | b | 68.27 | 56.32 | 78.41 | |||||||||
1998 | 61.55 | b | 59.18 | 67.50 | c | 71.68 | b | 74.36 | c | 85.93 | c | 97.83 | a | 100.67 | g | 88.83 | a | 76.53 | a | 64.10 | 55.59 | b | 73.01 | a | ||
1999 | 56.29 | 61.04 | 65.45 | b | 73.04 | b | 83.33 | a | 90.17 | 96.87 | 93.90 | 92.17 | 84.87 | 70.27 | 61.53 | a | 77.41 | |||||||||
2000 | 62.20 | a | 65.14 | 68.67 | a | 79.07 | 86.81 | 94.76 | a | 96.32 | c | 98.61 | 89.83 | a | 78.35 | 60.97 | a | 60.39 | 78.43 | |||||||
2001 | 58.63 | a | 60.35 | b | 71.00 | 72.93 | a | 93.47 | a | 95.97 | 97.45 | 98.16 | 92.10 | 83.00 | 68.37 | 57.97 | 79.12 | |||||||||
2002 | 55.23 | a | 65.07 | 69.54 | c | 77.20 | 82.48 | d | 95.07 | a | 101.00 | 97.80 | a | 93.55 | a | 79.52 | 69.93 | a | 62.39 | 79.06 | ||||||
2003 | 62.42 | 62.61 | 71.60 | a | 72.96 | b | 83.79 | c | 95.86 | a | 101.31 | b | 96.42 | 95.33 | 85.23 | a | 63.17 | 60.93 | a | 79.30 | ||||||
2004 | 54.34 | b | 62.11 | a | 76.10 | b | 79.47 | 85.58 | 92.73 | 98.52 | 96.03 | 91.37 | 75.97 | a | 61.62 | a | 56.48 | 77.53 | ||||||||
2005 | 55.26 | 62.11 | 68.48 | 74.17 | 81.97 | 86.90 | 102.17 | a | 99.19 | 87.23 | 78.36 | c | 70.07 | 61.32 | c | 77.27 | ||||||||||
2006 | 60.48 | 64.00 | c | 63.37 | a | 70.92 | d | 87.45 | 95.00 | 101.88 | e | 96.21 | b | 93.11 | b | 76.29 | 65.67 | 60.16 | 77.88 | |||||||
2007 | 56.16 | 64.31 | b | 75.65 | 77.97 | 88.23 | 93.77 | 97.40 | a | 98.68 | 89.35 | g | 80.10 | a | 71.27 | h | 60.13 | h | 81.36 | c | ||||||
2008 | 59.73 | a | 65.16 | d | 74.00 | 78.14 | a | 86.80 | a | 94.23 | 97.97 | a | 98.00 | b | 92.40 | 80.90 | 67.20 | 52.87 | 78.95 | |||||||
2009 | 56.23 | 61.29 | 67.00 | a | 75.41 | a | 87.71 | 87.77 | 99.77 | 95.52 | 93.90 | a | 75.38 | b | 65.43 | 56.53 | a | 76.83 | ||||||||
2010 | 56.03 | 60.07 | 67.13 | 69.23 | 77.10 | 90.67 | c | 97.34 | b | 94.97 | 88.69 | n | 78.13 | 64.87 | 59.03 | b | 74.05 | a | ||||||||
2011 | 52.70 | a | 59.11 | a | 64.61 | c | 72.77 | 77.61 | 87.50 | 95.14 | c | 96.55 | 99.70 | t | ----- | z | ----- | z | ----- | z | 75.75 | d | ||||
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.95 | 62.40 | 69.63 | 75.05 | 84.16 | 91.77 | 98.49 | 97.15 | 91.83 | 79.75 | 66.18 | 58.56 | 78.27 | |||||||||||||
S.D. | 2.92 | 2.08 | 3.85 | 3.23 | 4.98 | 3.36 | 2.32 | 1.71 | 2.11 | 3.05 | 3.45 | 2.90 | 0.83 | |||||||||||||
SKEW | -0.01 | -0.04 | 0.22 | -0.05 | -0.31 | -0.36 | 0.34 | -0.07 | -0.56 | 0.43 | -0.03 | -0.34 | -0.28 | |||||||||||||
MAX | 62.42 | 65.16 | 76.10 | 79.57 | 93.47 | 95.97 | 102.17 | 100.27 | 95.33 | 85.23 | 71.93 | 62.39 | 79.30 | |||||||||||||
MIN | 52.70 | 59.11 | 63.37 | 69.23 | 74.36 | 85.93 | 95.14 | 93.90 | 87.23 | 75.38 | 60.97 | 52.87 | 76.83 | |||||||||||||
YRS | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 15 | 17 | 16 | 16 | 13 |