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 | 50.45 | 45.98 | 48.22 | j | ||
1994 | 46.82 | 47.07 | 53.72 | b | 54.71 | a | 58.28 | b | 63.72 | 63.44 | d | 65.66 | 62.72 | a | 60.22 | v | 44.59 | a | 43.15 | 54.90 | a | |||||
1995 | 49.40 | 50.15 | a | 51.50 | 54.34 | b | 57.40 | 62.10 | 67.87 | 67.23 | 64.42 | 59.37 | 55.93 | 50.18 | 57.49 | |||||||||||
1996 | 49.12 | c | 53.80 | b | 52.60 | a | 56.78 | a | 60.69 | 65.35 | d | 71.38 | a | ----- | z | ----- | z | 57.60 | 52.78 | 49.94 | 57.00 | b | ||||
1997 | 49.42 | a | 48.05 | g | 53.18 | c | 56.80 | b | 63.52 | b | 63.79 | b | 67.25 | a | 69.00 | ----- | z | ----- | z | 55.48 | d | 45.91 | b | 58.26 | c | |
1998 | 49.80 | a | 48.98 | e | 51.65 | a | ----- | z | ----- | z | ----- | z | ----- | z | 70.06 | 66.98 | e | 54.73 | 48.67 | f | 41.12 | c | 54.76 | e | ||
1999 | 45.65 | 44.92 | j | 46.31 | b | 51.21 | b | 55.12 | b | 62.23 | b | 65.31 | 65.05 | a | ----- | z | 59.60 | a | ----- | z | 44.73 | c | 55.02 | c | ||
2000 | ----- | z | ----- | z | ----- | z | 55.15 | 61.00 | b | 65.67 | a | 64.77 | a | 66.97 | 64.02 | d | 55.56 | d | 44.61 | c | 46.50 | 58.25 | c | |||
2001 | 43.14 | b | 44.64 | c | 51.50 | e | 49.85 | d | 63.45 | c | 66.73 | d | 64.25 | c | 66.41 | b | 62.67 | a | 58.12 | c | 52.88 | d | 47.09 | b | 55.89 | |
2002 | 40.69 | b | 48.29 | d | 48.43 | b | 52.40 | f | 57.74 | b | 63.71 | d | 66.48 | a | 66.86 | c | 65.88 | b | 54.07 | a | 52.07 | c | 45.89 | d | 55.46 | a |
2003 | 49.38 | c | 46.06 | c | 49.20 | c | 50.12 | a | 58.77 | c | 63.96 | c | 70.22 | d | 66.76 | b | 65.96 | e | 60.60 | a | 47.57 | g | 46.44 | d | 57.04 | a |
2004 | 45.36 | f | 46.29 | e | 55.32 | c | 55.37 | c | 59.46 | d | 64.02 | c | 67.75 | g | 66.78 | b | 64.24 | a | 55.86 | c | 46.48 | g | 45.62 | c | 57.00 | c |
2005 | 45.39 | d | 49.75 | d | 52.35 | e | 52.14 | h | 58.78 | d | 60.67 | i | 70.21 | s | 68.64 | b | 60.27 | d | 56.54 | c | 52.14 | e | 48.91 | c | 54.75 | c |
2006 | 44.88 | e | 47.27 | d | 45.58 | g | 52.69 | d | 59.90 | g | 66.48 | a | 72.32 | 64.14 | b | 63.73 | d | 57.54 | s | ----- | z | 43.12 | g | 58.79 | e | |
2007 | 41.46 | f | 47.00 | g | 53.54 | h | 54.95 | j | 59.36 | f | 64.29 | a | 67.04 | d | 66.92 | e | 62.32 | e | 56.45 | l | 50.42 | j | 40.43 | i | 65.14 | h |
2008 | 43.24 | l | 45.69 | h | 49.48 | d | 53.00 | i | 57.50 | b | 64.55 | b | 67.91 | c | 67.84 | c | 64.80 | c | 60.65 | k | 53.76 | g | 42.75 | g | 62.01 | f |
2009 | 45.65 | g | 46.66 | f | 48.38 | e | 51.98 | f | 61.98 | e | 63.39 | c | 67.67 | h | 67.56 | g | 68.78 | e | ----- | z | ----- | z | 43.36 | f | 60.63 | h |
2010 | 46.16 | f | 47.70 | f | 47.95 | c | 50.17 | d | 56.42 | g | 64.38 | b | 65.48 | b | 65.30 | f | 65.00 | e | ----- | z | ----- | z | ----- | z | 58.60 | g |
2011 | ----- | z | ----- | z | 50.62 | j | 52.80 | c | 54.81 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.80 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 46.70 | 48.23 | 50.83 | 53.33 | 59.18 | 64.29 | 67.21 | 67.02 | 64.41 | 57.20 | 51.22 | 46.27 | 56.69 | |||||||||||||
S.D. | 3.04 | 2.61 | 2.57 | 2.56 | 2.71 | 1.33 | 2.73 | 1.55 | 2.13 | 2.21 | 4.11 | 2.51 | 1.13 | |||||||||||||
SKEW | -0.63 | 0.78 | -0.06 | -0.09 | 0.11 | 0.26 | 0.54 | 0.13 | 0.14 | 0.12 | -0.74 | -0.23 | -0.00 | |||||||||||||
MAX | 49.80 | 53.80 | 55.32 | 56.80 | 63.52 | 66.73 | 72.32 | 70.06 | 68.78 | 60.60 | 55.93 | 50.18 | 57.49 | |||||||||||||
MIN | 40.69 | 44.64 | 46.31 | 49.85 | 54.81 | 62.10 | 63.44 | 64.14 | 60.27 | 54.07 | 44.59 | 41.13 | 55.89 | |||||||||||||
YRS | 11 | 10 | 14 | 12 | 14 | 15 | 13 | 14 | 14 | 10 | 9 | 13 | 2 |