YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.47 | l | ----- | z |
1928 | 69.55 | 67.28 | 68.87 | 73.07 | c | 77.84 | 81.87 | 89.68 | 90.97 | 94.40 | 79.87 | 72.33 | 64.55 | 77.52 | ||||||||||||
1929 | 61.32 | 59.18 | 66.52 | 65.67 | 79.60 | a | 83.33 | 89.52 | 94.32 | 83.63 | 82.58 | 78.30 | 74.32 | 76.52 | ||||||||||||
1930 | 59.83 | b | 70.36 | 66.90 | 73.33 | 69.65 | 81.73 | 91.61 | 89.29 | 82.47 | 79.94 | 72.70 | 67.23 | 75.42 | ||||||||||||
1931 | 65.77 | 64.54 | 74.61 | 76.17 | 79.61 | 82.00 | 93.00 | 90.52 | 86.60 | 78.39 | 66.21 | a | 59.68 | 76.42 | ||||||||||||
1932 | 59.24 | b | 61.89 | a | 71.87 | a | 75.57 | 76.68 | 84.37 | 90.00 | 91.90 | 89.03 | 80.19 | 81.23 | ----- | z | 78.36 | a | ||||||||
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 69.82 | 68.19 | 75.43 | 77.20 | a | 89.76 | a | 91.10 | 90.45 | 91.90 | 79.00 | a | 74.13 | 66.17 | a | 79.38 | a | |||||||
1975 | 70.58 | 66.07 | 64.23 | a | 63.70 | 76.45 | 81.43 | 90.32 | 91.48 | 90.31 | d | 80.67 | a | 76.20 | 70.81 | 76.85 | ||||||||||
1976 | 73.19 | 67.07 | a | 69.23 | 68.83 | 78.70 | a | 88.00 | 87.48 | 87.79 | b | 80.23 | 82.77 | 78.83 | 73.13 | 77.94 | ||||||||||
1977 | 66.48 | 76.33 | a | 66.68 | 76.70 | 70.97 | 84.90 | 92.74 | 90.87 | 86.97 | 84.80 | a | 80.17 | 67.87 | 78.79 | |||||||||||
1978 | 66.26 | 66.25 | 69.07 | a | 68.17 | 80.32 | 90.66 | a | 93.23 | 90.16 | 87.50 | 86.16 | 70.37 | 64.45 | 77.72 | |||||||||||
1979 | 60.13 | 66.25 | 66.29 | 73.50 | 76.52 | 88.93 | 91.87 | 87.71 | 95.66 | a | 80.52 | 72.33 | 74.00 | b | 77.81 | |||||||||||
1980 | 65.73 | a | 73.60 | i | ----- | z | 73.73 | d | 69.00 | d | 85.92 | d | 95.82 | c | 90.90 | a | 87.30 | 85.35 | 77.67 | 74.40 | a | 80.58 | b | |||
1981 | 71.13 | a | 73.64 | 66.17 | a | 74.33 | 76.48 | b | 92.37 | 92.37 | d | 95.29 | c | 90.34 | a | 77.67 | d | 76.00 | c | 73.77 | 79.96 | |||||
1982 | 65.00 | d | 68.77 | b | 65.22 | d | 72.77 | d | 73.35 | e | 76.04 | e | 92.34 | b | 93.07 | b | 88.21 | a | 83.15 | e | 69.39 | b | 66.45 | 76.15 | ||
1983 | 69.48 | b | 66.36 | c | 65.15 | d | 67.56 | c | 78.36 | c | 80.81 | c | 91.21 | b | 92.55 | b | 92.58 | d | 82.41 | b | ----- | z | 66.83 | a | 77.57 | a |
1984 | 69.90 | ----- | z | 74.24 | b | ----- | z | 85.12 | e | 84.83 | f | 92.47 | a | 90.52 | ----- | z | 77.29 | g | 68.54 | d | 60.39 | c | 77.31 | e | ||
1985 | 61.82 | c | 67.44 | a | 66.04 | f | 78.91 | g | 75.96 | e | 87.85 | c | 92.00 | f | 90.10 | a | 80.20 | e | 78.16 | f | 66.11 | b | 69.89 | d | 74.92 | d |
1986 | 71.93 | b | 67.86 | f | 69.69 | e | 71.83 | a | 78.16 | f | 84.07 | c | 86.70 | a | 91.82 | c | 77.93 | c | 78.32 | f | 74.85 | d | 66.96 | c | 77.31 | c |
1987 | 64.88 | f | 64.75 | d | 65.78 | d | 77.67 | f | 76.04 | c | 84.26 | g | 83.82 | c | 86.85 | d | 87.38 | d | 81.46 | g | 68.48 | c | 61.38 | b | 74.31 | d |
1988 | 66.20 | f | 71.62 | e | 73.12 | e | 72.12 | f | 78.61 | c | 79.88 | f | 88.42 | e | 86.61 | 84.44 | e | 82.12 | e | 70.24 | e | 64.79 | b | 77.77 | c | |
1989 | 64.37 | d | 64.43 | g | 72.72 | f | 78.48 | e | 77.25 | c | 83.64 | h | 89.93 | c | 85.23 | 89.91 | g | 79.19 | e | 75.89 | b | 71.18 | c | 77.69 | d | |
1990 | 66.43 | c | 64.42 | d | 69.04 | c | 70.56 | e | 75.12 | g | 87.46 | d | 90.73 | e | 86.32 | f | 87.19 | d | 84.48 | d | 73.31 | d | 64.25 | c | 75.79 | b |
1991 | 66.04 | e | 74.28 | c | 60.77 | e | 71.07 | b | 73.04 | g | 77.42 | d | 84.07 | c | ----- | z | 87.04 | b | ----- | z | 75.93 | b | 64.74 | d | 73.48 | c |
1992 | 66.63 | d | 67.00 | b | 62.36 | c | 76.38 | d | 76.36 | f | 81.96 | d | ----- | z | ----- | z | 90.00 | a | 79.89 | d | 72.93 | c | 61.96 | c | 73.23 | c |
1993 | 62.27 | e | 61.48 | c | 71.27 | e | 76.17 | g | 77.67 | g | 84.25 | b | 83.29 | 87.75 | c | ----- | z | ----- | z | 72.17 | a | 68.64 | c | 73.89 | d | |
1994 | 73.33 | d | 63.88 | b | ----- | z | 71.08 | f | 71.15 | e | 88.04 | c | 88.80 | a | 94.32 | c | 89.11 | b | 78.40 | a | 66.63 | 65.37 | a | 77.90 | b | |
1995 | 61.42 | 70.63 | a | 65.97 | 70.52 | a | 68.96 | d | 81.00 | 91.79 | b | 95.00 | a | 91.44 | c | 82.59 | b | 78.25 | b | 68.54 | c | 77.18 | ||||
1996 | 67.97 | a | 66.76 | 70.42 | g | 78.92 | f | 79.84 | f | 88.46 | d | 92.87 | a | 94.39 | ----- | z | 82.08 | f | 73.85 | d | 66.32 | c | 78.66 | e | ||
1997 | 63.21 | b | 67.22 | e | 76.36 | f | 74.19 | c | 85.17 | b | 80.80 | 87.75 | c | 92.22 | d | 91.67 | c | 80.23 | e | ----- | z | 65.14 | c | 78.76 | b | |
1998 | 63.54 | e | 59.77 | b | 65.92 | f | 69.26 | g | 68.72 | f | 77.75 | f | ----- | z | 95.34 | b | 84.08 | e | ----- | z | ----- | z | 65.83 | a | 73.71 | g |
1999 | 69.54 | c | 67.15 | b | 65.33 | d | 67.70 | 75.39 | c | 83.74 | c | 89.71 | c | 91.41 | b | 84.71 | f | 90.62 | b | 76.45 | a | 72.50 | c | 77.23 | a | |
2000 | 70.59 | b | 67.15 | b | 67.81 | d | 76.10 | 80.52 | d | 87.67 | f | 89.93 | b | 91.38 | b | 87.11 | b | 74.25 | c | 70.32 | b | 72.83 | a | 77.09 | a | |
2001 | 63.55 | b | 62.32 | c | 67.52 | b | 67.97 | 81.23 | a | 86.88 | e | 87.16 | 91.83 | a | 90.04 | c | 81.93 | d | 72.00 | f | 64.84 | 76.84 | a | |||
2002 | 67.06 | 74.25 | d | 69.00 | c | 71.80 | t | ----- | z | ----- | z | ----- | z | 91.50 | c | 90.67 | 74.65 | 76.55 | a | 64.20 | a | 75.98 | d | |||
2003 | 75.33 | d | 64.00 | c | 70.26 | 68.00 | c | 76.58 | g | 77.47 | 91.87 | a | 93.83 | a | 92.00 | c | 89.56 | f | 69.07 | a | 66.78 | d | 76.86 | b | ||
2004 | 66.54 | e | 63.39 | a | 77.92 | e | 75.48 | c | 79.57 | c | 81.88 | d | 90.81 | 90.61 | 91.74 | g | 76.36 | f | 66.73 | 67.10 | 76.00 | b | ||||
2005 | 65.52 | f | 62.90 | g | 67.67 | g | 73.12 | e | 78.42 | e | 80.73 | d | 94.00 | i | 92.07 | b | 87.93 | a | 78.96 | c | 76.00 | h | 71.00 | a | 80.32 | e |
2006 | 68.33 | a | 72.00 | a | 61.86 | b | 68.75 | b | 79.08 | f | 87.80 | e | 95.62 | e | 91.11 | c | 91.60 | e | 79.31 | b | 77.23 | d | 69.48 | b | 78.46 | a |
2007 | 64.53 | a | 65.73 | f | 73.97 | b | 71.53 | o | 79.09 | i | 86.54 | b | 91.30 | a | 93.97 | a | 87.24 | e | 80.73 | e | 76.20 | 64.74 | 79.91 | c | ||
2008 | 62.47 | a | 66.11 | a | 70.97 | 76.81 | c | 75.00 | c | 88.68 | b | 90.61 | 92.55 | 90.71 | p | ----- | z | ----- | z | ----- | z | 77.90 | d | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 66.40 | 67.04 | 68.31 | 72.18 | 76.87 | 84.46 | 90.28 | 91.29 | 88.01 | 81.06 | 73.40 | 67.43 | 77.36 | |||||||||||||
S.D. | 4.09 | 4.13 | 3.88 | 3.79 | 4.14 | 4.02 | 2.90 | 2.48 | 4.05 | 3.34 | 4.21 | 3.95 | 1.23 | |||||||||||||
SKEW | 0.19 | 0.32 | 0.35 | -0.39 | -0.21 | -0.13 | -0.65 | -0.45 | -0.58 | 0.50 | -0.15 | 0.18 | 0.53 | |||||||||||||
MAX | 75.33 | 76.33 | 77.92 | 78.48 | 85.17 | 92.37 | 95.82 | 95.34 | 95.66 | 90.62 | 81.23 | 74.40 | 79.96 | |||||||||||||
MIN | 59.24 | 59.18 | 60.77 | 63.70 | 68.96 | 76.04 | 83.29 | 85.23 | 77.93 | 74.25 | 66.11 | 59.68 | 75.42 | |||||||||||||
YRS | 36 | 34 | 32 | 30 | 29 | 33 | 35 | 37 | 33 | 29 | 34 | 38 | 12 |