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 | 74.68 | 65.39 | 51.05 | 46.95 | a | 59.52 | h | |||
1995 | 53.31 | 54.62 | 58.10 | 60.63 | d | 65.48 | e | 73.26 | a | 79.63 | 80.40 | b | 77.40 | 69.97 | b | 61.31 | a | 53.09 | c | 65.60 | ||||||
1996 | 50.10 | f | 57.00 | 60.90 | 66.29 | a | 70.90 | b | 77.68 | 87.03 | a | 81.52 | a | 74.47 | 66.42 | 57.23 | 50.72 | b | 68.20 | a | ||||||
1997 | 51.63 | a | 53.48 | d | 61.82 | 63.30 | 73.20 | a | 75.98 | a | 80.05 | a | 81.29 | 77.43 | a | 66.68 | c | 57.20 | b | 47.95 | c | 65.83 | ||||
1998 | 52.20 | f | 52.63 | a | 58.84 | c | 60.80 | b | 61.95 | c | 70.42 | d | 78.83 | b | 81.78 | h | 75.47 | a | 65.07 | b | 55.62 | 46.52 | c | 62.61 | b | |
1999 | 47.76 | d | 52.48 | a | 56.05 | c | 60.93 | b | 68.83 | a | 73.83 | 80.32 | 78.61 | 77.42 | 71.15 | 59.67 | a | 51.23 | a | 64.86 | ||||||
2000 | 53.77 | a | 56.22 | 58.66 | b | 66.66 | b | 72.88 | a | 77.98 | d | 80.27 | e | 81.24 | 75.91 | a | 67.06 | 52.04 | b | 51.25 | a | 66.16 | ||||
2001 | 49.92 | a | 52.02 | e | 61.52 | 62.02 | b | 77.40 | a | 77.08 | 79.21 | 78.92 | 74.23 | 68.40 | 58.87 | 49.95 | a | 65.79 | ||||||||
2002 | 47.31 | d | 54.30 | 57.50 | c | 63.73 | 68.09 | d | 76.39 | b | 81.47 | 78.52 | a | 75.19 | a | 65.29 | 59.16 | a | 53.50 | 65.04 | ||||||
2003 | 53.00 | a | 53.15 | b | 59.86 | b | 60.19 | d | 69.57 | d | 78.17 | a | 88.68 | c | 83.78 | a | 81.23 | 72.08 | a | 54.21 | a | 52.15 | a | 67.17 | ||
2004 | 47.70 | c | 53.25 | a | 65.22 | b | 67.20 | 72.67 | a | 78.92 | 84.35 | 82.25 | a | 77.72 | 65.71 | b | 53.40 | a | 48.00 | 66.36 | ||||||
2005 | 48.82 | 54.73 | 59.79 | 62.55 | 71.29 | 74.24 | a | 85.65 | a | 82.16 | 73.17 | 66.91 | c | 59.70 | 52.89 | c | 65.99 | |||||||||
2006 | 51.55 | 54.20 | c | 52.57 | a | 59.40 | d | 73.85 | 80.20 | 88.10 | e | 79.93 | b | 75.83 | c | 63.55 | 56.50 | 49.94 | 65.47 | |||||||
2007 | 47.06 | 53.63 | b | 60.97 | 64.00 | 71.00 | 76.56 | e | 80.98 | d | 83.08 | 74.67 | g | 66.02 | a | 59.34 | h | 48.05 | i | 67.03 | c | |||||
2008 | 49.16 | b | 52.34 | d | 59.18 | 62.95 | a | 71.83 | a | 78.36 | a | 84.32 | a | 83.78 | b | 78.03 | 66.87 | 56.82 | 44.53 | 65.68 | ||||||
2009 | 46.44 | 50.79 | 54.57 | a | 61.53 | a | 73.90 | 75.60 | 84.60 | 80.98 | 79.57 | a | 63.02 | b | 53.00 | 46.57 | a | 64.21 | ||||||||
2010 | 47.63 | 51.07 | 54.45 | 57.25 | 64.19 | 76.37 | c | 82.98 | b | 79.73 | 74.78 | n | 67.05 | 52.50 | 50.09 | b | 62.12 | a | ||||||||
2011 | 43.73 | a | 47.04 | a | 53.38 | c | 59.58 | 63.94 | 73.85 | 81.48 | d | 81.18 | 83.28 | u | ----- | z | ----- | z | ----- | z | 63.02 | 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 | 49.25 | 53.12 | 58.43 | 62.30 | 70.06 | 76.17 | 82.82 | 81.09 | 76.52 | 66.86 | 56.14 | 49.71 | 65.68 | |||||||||||||
S.D. | 2.89 | 2.26 | 3.37 | 2.72 | 4.17 | 2.45 | 3.18 | 1.68 | 2.16 | 2.42 | 3.15 | 2.69 | 0.76 | |||||||||||||
SKEW | 0.05 | -0.83 | -0.08 | 0.26 | -0.43 | -0.58 | 0.50 | 0.05 | 0.53 | 0.67 | -0.07 | -0.30 | -0.05 | |||||||||||||
MAX | 53.77 | 57.00 | 65.22 | 67.20 | 77.40 | 80.20 | 88.68 | 83.78 | 81.23 | 72.08 | 61.31 | 53.50 | 67.17 | |||||||||||||
MIN | 43.73 | 47.04 | 52.57 | 57.25 | 61.95 | 70.42 | 78.83 | 78.52 | 73.17 | 63.02 | 51.05 | 44.53 | 64.21 | |||||||||||||
YRS | 15 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 15 | 17 | 16 | 16 | 12 |