| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1996 | 62.00 | ----- | z | ----- | z | 73.00 | 72.00 | 72.00 | 74.00 | k | 76.00 | 84.00 | 81.00 | 68.00 | 65.00 | 84.00 | ||||||||||
| 1997 | 69.00 | 67.00 | 69.00 | 70.00 | 81.00 | 72.00 | 75.00 | 81.00 | 82.00 | 73.00 | 72.00 | 65.00 | 82.00 | |||||||||||||
| 1998 | 66.00 | 65.00 | 71.00 | 71.00 | 72.00 | 69.00 | 75.00 | 75.00 | 76.00 | 84.00 | 63.00 | 61.00 | 84.00 | |||||||||||||
| 1999 | 67.00 | 60.00 | 69.00 | 80.00 | 70.00 | 73.00 | 74.00 | l | 77.00 | 80.00 | l | 78.00 | c | 72.00 | 71.00 | 80.00 | ||||||||||
| 2000 | 62.00 | 69.00 | 68.00 | 68.00 | 72.00 | 77.00 | 71.00 | j | 75.00 | 84.00 | 74.00 | 70.00 | 66.00 | 84.00 | ||||||||||||
| 2001 | 69.00 | 67.00 | 73.00 | 67.00 | 85.00 | 71.00 | i | 72.00 | 75.00 | 82.00 | 80.00 | 69.00 | 62.00 | 85.00 | ||||||||||||
| 2002 | 66.00 | 71.00 | 66.00 | 68.00 | 70.00 | 74.00 | f | 81.00 | d | 80.00 | d | 79.00 | e | 78.00 | c | 75.00 | 67.00 | 81.00 | ||||||||
| 2003 | 68.00 | c | 65.00 | 64.00 | c | 63.00 | a | 76.00 | 80.00 | d | 76.00 | c | 79.00 | f | 82.00 | 92.00 | 65.00 | c | 68.00 | c | 92.00 | |||||
| 2004 | 66.00 | 65.00 | 75.00 | f | 83.00 | 73.00 | a | 81.00 | b | 80.00 | d | 88.00 | 80.00 | 79.00 | 67.00 | 71.00 | 88.00 | |||||||||
| 2005 | 69.00 | 71.00 | 77.00 | 67.00 | 85.00 | 72.00 | 78.00 | 81.00 | g | 74.00 | 76.00 | 68.00 | 70.00 | 85.00 | ||||||||||||
| 2006 | 72.00 | 74.00 | 62.00 | 65.00 | e | 87.00 | 72.00 | 76.00 | 72.00 | j | 86.00 | e | 83.00 | 65.00 | 67.00 | f | 87.00 | |||||||||
| 2007 | 61.00 | 65.00 | 71.00 | 70.00 | 75.00 | 72.00 | 78.00 | f | 77.00 | 75.00 | e | 78.00 | 72.00 | 63.00 | h | 78.00 | ||||||||||
| 2008 | 63.00 | 64.00 | 72.00 | i | 79.00 | 94.00 | d | 75.00 | 88.00 | 77.00 | f | 84.00 | 79.00 | 75.00 | 67.00 | d | 94.00 | |||||||||
| 2009 | 71.00 | 70.00 | 65.00 | 75.00 | 71.00 | 73.00 | 89.00 | 75.00 | l | 93.00 | 76.00 | 72.00 | 62.00 | 93.00 | ||||||||||||
| 2010 | 63.00 | 65.00 | 73.00 | 67.00 | 70.00 | 69.00 | 74.00 | 81.00 | e | 80.00 | 78.00 | n | 79.00 | g | 64.00 | e | 81.00 | |||||||||
| 2011 | 73.00 | b | 68.00 | a | 67.00 | m | 64.00 | d | 65.00 | g | 76.00 | g | 72.00 | d | 77.00 | g | 81.00 | f | 79.00 | a | 69.00 | k | 60.00 | p | 81.00 | |
| 2012 | 66.00 | h | 73.00 | 64.00 | s | 70.00 | 70.00 | b | 73.00 | k | 72.00 | l | 75.00 | f | 77.00 | f | 83.00 | 75.00 | 57.00 | 83.00 | ||||||
| 2013 | 60.00 | 67.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.00 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 66.29 | 67.41 | 69.00 | 70.59 | 76.44 | 73.62 | 78.00 | 78.50 | 81.50 | 79.56 | 69.87 | 65.43 | 83.00 | |||||||||||||
| S.D. | 3.96 | 3.59 | 4.31 | 5.72 | 7.55 | 3.71 | 5.62 | 4.12 | 4.90 | 4.53 | 3.85 | 4.03 | 1.41 | |||||||||||||
| SKEW | 0.03 | 0.08 | 0.11 | 0.81 | 1.02 | 0.83 | 0.96 | 1.24 | 0.53 | 1.14 | -0.19 | -0.37 | 0.00 | |||||||||||||
| MAX | 73.00 | 74.00 | 77.00 | 83.00 | 94.00 | 81.00 | 89.00 | 88.00 | 93.00 | 92.00 | 75.00 | 71.00 | 84.00 | |||||||||||||
| MIN | 60.00 | 60.00 | 62.00 | 63.00 | 70.00 | 69.00 | 72.00 | 75.00 | 74.00 | 73.00 | 63.00 | 57.00 | 82.00 | |||||||||||||
| NO YRS | 17 | 17 | 12 | 17 | 16 | 13 | 12 | 10 | 14 | 16 | 15 | 14 | 2 | |||||||||||||