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 | 55.19 | m | ----- | z |
1928 | 53.77 | 52.47 | 55.95 | a | 55.57 | c | 64.35 | 66.73 | 70.97 | a | 72.02 | 71.67 | 60.94 | 55.69 | a | 50.75 | a | 60.91 | ||||||||
1929 | 48.40 | 46.68 | c | 51.72 | d | 53.90 | 63.17 | a | 66.13 | 72.21 | 76.60 | 68.48 | b | 64.91 | c | 58.56 | d | 56.62 | f | 60.98 | a | |||||
1930 | 49.78 | f | 55.77 | d | 54.45 | b | 59.07 | a | 57.33 | a | 65.72 | 72.74 | 71.85 | 64.50 | 61.02 | a | 56.57 | c | 49.50 | c | 60.78 | a | ||||
1931 | 49.70 | i | 51.88 | g | 56.48 | b | 60.04 | b | 65.90 | a | 67.13 | 76.75 | a | 75.66 | b | 68.55 | b | 62.05 | a | 52.75 | d | 47.15 | d | 63.25 | b | |
1932 | 46.18 | c | 50.42 | e | 55.61 | c | 57.72 | 61.29 | 66.75 | 71.24 | 71.94 | 69.37 | 62.45 | 60.52 | ----- | z | 61.22 | 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 | 50.86 | 54.08 | 55.90 | 61.85 | a | 70.07 | a | 73.15 | 71.27 | 73.85 | 62.47 | a | 59.10 | 50.05 | a | 62.06 | a | |||||||
1975 | 54.35 | 50.79 | 50.92 | a | 51.22 | 60.48 | 64.58 | 71.79 | 70.76 | 72.27 | d | 61.47 | a | 58.72 | 54.27 | 60.13 | ||||||||||
1976 | 56.10 | 54.23 | a | 54.23 | 54.55 | 63.23 | a | 68.55 | 70.95 | 69.33 | b | 68.28 | 64.19 | 60.30 | 53.63 | 61.46 | ||||||||||
1977 | 50.53 | a | 56.09 | a | 49.98 | 58.02 | 57.02 | 67.47 | 73.08 | 74.84 | 70.40 | 66.13 | e | 61.50 | 54.45 | 61.63 | ||||||||||
1978 | 53.65 | 53.57 | 57.83 | a | 55.55 | 62.98 | 71.17 | a | 74.06 | 71.37 | 72.17 | a | 68.74 | 55.62 | 49.68 | 62.20 | ||||||||||
1979 | 49.73 | 52.48 | 54.16 | 57.80 | 62.63 | 70.78 | 73.55 | 71.40 | 75.10 | a | 62.44 | 55.10 | 56.33 | b | 61.79 | |||||||||||
1980 | 54.40 | a | 59.68 | l | ----- | z | 57.37 | d | 57.25 | e | 67.17 | d | 75.06 | e | 74.78 | a | 70.30 | 66.89 | 59.98 | 57.95 | b | 64.11 | b | |||
1981 | 55.97 | a | 58.38 | 54.28 | a | 60.53 | 63.33 | b | 74.10 | 75.50 | d | 77.36 | c | 73.29 | a | 62.04 | d | 59.46 | c | 56.19 | 64.20 | |||||
1982 | 50.33 | d | 52.77 | b | 53.42 | e | 59.67 | d | 61.23 | e | 62.92 | e | 73.45 | b | 75.45 | b | 73.17 | a | 64.14 | f | 54.55 | b | 49.92 | 60.63 | a | |
1983 | 51.86 | c | 51.30 | c | 53.07 | d | 53.02 | d | 61.43 | c | 64.56 | c | 71.79 | b | 75.67 | b | 74.08 | d | 65.74 | b | ----- | z | 51.43 | a | 61.27 | a |
1984 | 53.87 | ----- | z | 56.64 | b | ----- | z | 65.33 | e | 69.36 | i | 77.03 | b | 75.77 | ----- | z | 61.67 | g | 53.75 | d | 49.93 | c | 61.76 | e | ||
1985 | 50.41 | c | 52.65 | a | 53.08 | g | 62.26 | g | 61.50 | e | 70.11 | c | 76.14 | f | 73.03 | a | 67.26 | e | 63.40 | f | 54.26 | c | 55.28 | d | 60.56 | d |
1986 | 58.16 | b | 55.18 | f | 57.00 | e | 57.53 | a | 62.90 | f | 68.44 | c | 71.65 | a | 75.82 | c | 64.57 | c | 62.70 | f | 58.87 | d | 51.91 | c | 62.66 | c |
1987 | 49.98 | f | 51.72 | e | 53.37 | d | 61.46 | f | 63.73 | c | 68.43 | g | 68.05 | c | 70.78 | f | 70.67 | d | 68.25 | g | 55.69 | c | 48.31 | b | 58.79 | e |
1988 | 52.54 | f | 57.12 | e | 57.40 | e | 57.96 | f | 63.48 | d | 65.15 | f | 73.00 | e | 71.63 | 68.86 | e | 65.92 | e | 57.10 | e | 51.86 | b | 62.93 | c | |
1989 | 50.48 | d | 52.12 | g | 57.20 | f | 63.34 | e | 62.55 | c | 68.19 | i | 73.38 | c | 70.65 | 72.13 | g | 64.08 | e | 60.27 | b | 55.12 | c | 62.48 | d | |
1990 | 52.80 | c | 50.38 | d | 55.45 | c | 59.76 | e | 61.67 | g | 72.04 | d | 74.85 | e | 72.36 | f | 72.37 | d | 67.50 | d | 58.58 | d | 51.18 | c | 61.49 | b |
1991 | 51.63 | e | 57.42 | c | 50.27 | e | 57.66 | b | 59.69 | g | 63.71 | d | 69.96 | c | ----- | z | 72.45 | b | ----- | z | 60.11 | c | 52.65 | d | 59.54 | c |
1992 | 52.91 | d | 55.56 | b | 53.86 | c | 62.56 | d | 65.62 | f | 67.52 | d | ----- | z | ----- | z | 73.40 | a | 65.56 | d | 59.06 | c | 49.86 | c | 60.03 | c |
1993 | 52.38 | f | 52.44 | c | 58.10 | f | 61.28 | g | 64.46 | g | 69.34 | b | 69.48 | 71.54 | c | ----- | z | ----- | z | 56.46 | b | 50.96 | c | 61.70 | f | |
1994 | 54.13 | d | 50.31 | b | ----- | z | 58.02 | f | 59.19 | e | 70.00 | c | 72.38 | a | 76.48 | c | 71.25 | b | 62.07 | a | 50.23 | 50.18 | a | 61.62 | b | |
1995 | 51.15 | 57.28 | a | 54.47 | 55.69 | a | 58.50 | d | 65.08 | 72.60 | b | 76.75 | a | 73.61 | c | 65.18 | c | 60.63 | d | 52.04 | c | 61.91 | ||||
1996 | 51.98 | a | 54.29 | 55.10 | g | 60.56 | f | 64.16 | f | 69.96 | e | 75.47 | a | 76.89 | ----- | z | 63.96 | f | 58.60 | d | 52.70 | c | 62.84 | e | ||
1997 | 52.47 | b | 50.76 | e | 57.42 | f | 57.43 | c | 68.26 | b | 66.90 | 71.05 | c | 75.59 | d | 75.81 | c | 64.31 | e | ----- | z | 49.93 | d | 63.25 | b | |
1998 | 51.46 | e | 49.71 | b | 53.48 | f | 55.02 | g | 57.50 | f | 63.56 | f | ----- | z | 77.59 | b | 69.74 | e | ----- | z | ----- | z | 50.53 | b | 59.81 | g |
1999 | 52.98 | c | 51.35 | d | 51.13 | d | 54.08 | 60.95 | c | 66.13 | c | 71.89 | c | 72.24 | b | 68.83 | f | 68.14 | b | 58.05 | a | 53.52 | c | 60.04 | a | |
2000 | 54.57 | b | 54.02 | b | 53.35 | d | 59.64 | a | 64.87 | d | 69.79 | f | 71.67 | b | 74.52 | b | 70.45 | b | 61.29 | c | 52.50 | b | 54.35 | a | 61.02 | a |
2001 | 48.83 | b | 49.26 | c | 54.56 | d | 54.88 | 65.40 | a | 68.74 | e | 70.68 | 74.32 | a | 71.33 | d | 64.91 | d | 56.58 | f | 49.37 | 61.12 | a | |||
2002 | 50.08 | 53.48 | d | 52.71 | c | 58.10 | t | ----- | z | ----- | z | ----- | z | 73.15 | d | 72.93 | a | 60.76 | 60.05 | a | 49.70 | a | 59.11 | d | ||
2003 | 56.74 | d | 51.92 | c | 54.73 | a | 53.69 | c | 61.33 | g | 65.13 | 74.75 | a | 76.97 | a | 73.19 | c | 71.06 | f | 55.08 | e | 50.75 | g | 62.47 | c | |
2004 | 51.10 | e | 49.09 | a | 60.94 | g | 60.06 | c | 64.16 | c | 66.96 | d | 73.90 | 73.68 | 73.57 | g | 63.02 | g | 53.43 | 52.23 | 60.51 | c | ||||
2005 | 51.98 | f | 51.90 | g | 54.70 | h | 57.32 | e | 63.15 | e | 65.66 | e | 76.85 | k | 75.69 | b | 69.45 | a | 63.93 | d | 59.14 | h | 53.73 | a | 64.13 | e |
2006 | 52.15 | a | 53.57 | a | 49.69 | b | 55.82 | b | 65.62 | f | 71.58 | e | 78.65 | e | 74.82 | c | 72.24 | e | 63.40 | b | 60.08 | d | 52.14 | b | 62.19 | a |
2007 | 48.07 | a | 53.23 | f | 57.84 | b | 57.36 | p | 65.31 | j | 69.27 | b | 75.07 | a | 79.78 | a | 73.70 | e | 66.60 | e | 63.35 | 51.03 | 64.97 | c | ||
2008 | 50.72 | a | 52.14 | a | 55.37 | 61.04 | c | 62.30 | c | 71.93 | b | 75.24 | 77.40 | 75.43 | p | ----- | z | ----- | z | ----- | z | 63.27 | d | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.18 | 52.74 | 54.13 | 57.35 | 62.31 | 67.95 | 73.06 | 74.29 | 71.17 | 64.11 | 57.49 | 51.94 | 61.78 | |||||||||||||
S.D. | 2.63 | 2.71 | 2.27 | 2.89 | 2.67 | 2.68 | 2.25 | 2.50 | 2.70 | 2.32 | 3.02 | 2.45 | 1.17 | |||||||||||||
SKEW | 0.09 | 0.24 | -0.28 | 0.04 | -0.27 | 0.23 | 0.25 | -0.06 | -0.72 | 0.25 | -0.42 | 0.48 | 0.86 | |||||||||||||
MAX | 58.16 | 58.38 | 57.84 | 63.34 | 68.26 | 74.10 | 78.65 | 79.78 | 75.81 | 68.74 | 63.35 | 57.95 | 64.20 | |||||||||||||
MIN | 46.18 | 46.68 | 49.69 | 51.22 | 57.02 | 62.92 | 68.05 | 69.33 | 64.50 | 60.76 | 50.23 | 47.15 | 60.13 | |||||||||||||
YRS | 33 | 33 | 30 | 30 | 29 | 33 | 35 | 36 | 33 | 28 | 34 | 36 | 8 |