YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 66.65 | 84.50 | 83.86 | f | 83.47 | 80.73 | 73.00 | 62.29 | a | 56.43 | a | 72.44 | e | |||||
1918 | 48.69 | d | 54.41 | a | 61.90 | b | 64.60 | a | 67.92 | 85.50 | 85.97 | a | 81.55 | 81.08 | 71.15 | 56.41 | a | 48.26 | 67.29 | |||||||
1919 | 49.34 | 48.88 | 55.34 | 67.22 | 72.23 | a | 82.87 | 82.77 | 84.55 | 78.83 | a | 64.52 | d | 55.93 | 54.76 | 66.44 | ||||||||||
1920 | 53.31 | 55.33 | 57.06 | 62.87 | 73.08 | ----- | z | 95.44 | w | 82.68 | a | 79.21 | d | 65.50 | k | 57.53 | a | 48.46 | e | 63.28 | c | |||||
1921 | 51.43 | d | 57.02 | g | 62.56 | 64.73 | 70.29 | 81.92 | 84.53 | b | 82.25 | c | 83.31 | a | 80.14 | i | 61.35 | 56.87 | a | 69.92 | b | |||||
1922 | 50.56 | 55.96 | 57.77 | 64.07 | 75.37 | 85.67 | 89.44 | 86.24 | ----- | z | 70.67 | a | 54.98 | a | 54.19 | 67.72 | a | |||||||||
1923 | 56.27 | 53.05 | 56.79 | 64.10 | a | 75.81 | 77.98 | f | 84.84 | l | 82.43 | a | 78.21 | a | 66.39 | 58.03 | 50.38 | a | 64.15 | b | ||||||
1924 | 51.25 | e | 57.11 | g | 54.68 | a | 63.19 | f | 75.02 | j | 84.88 | e | 85.55 | i | 85.12 | k | 80.59 | g | 67.58 | s | ----- | z | ----- | z | 63.60 | i |
1925 | 47.50 | o | 57.47 | k | 62.21 | g | 66.41 | g | 72.76 | j | 80.40 | t | 84.14 | f | 80.77 | i | ----- | z | ----- | z | ----- | z | 50.04 | s | ----- | 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 | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 57.16 | a | 56.76 | 56.96 | j | |
1941 | 52.76 | 57.70 | 58.31 | 60.33 | 72.97 | 78.72 | 85.71 | 83.44 | 78.25 | 66.73 | 61.65 | 52.42 | 67.41 | |||||||||||||
1942 | 52.60 | 52.05 | 56.44 | 63.33 | 71.34 | 81.28 | 87.55 | 83.39 | 81.25 | 69.94 | 62.17 | 55.98 | 68.11 | |||||||||||||
1943 | 54.32 | 58.21 | 60.89 | 68.83 | 73.82 | 81.22 | 87.45 | a | 86.14 | c | 82.93 | a | 70.56 | 59.74 | a | 52.07 | c | 69.68 | ||||||||
1944 | 49.92 | 50.23 | a | 56.53 | 62.17 | 71.50 | 78.08 | 85.89 | 85.71 | 78.36 | s | 72.81 | 55.78 | 52.12 | a | 65.52 | a | |||||||||
1945 | 50.35 | 54.55 | 54.90 | b | 64.52 | ----- | z | ----- | z | ----- | z | 83.52 | 80.67 | 70.26 | 58.48 | 51.24 | 63.17 | c | ||||||||
1946 | 48.84 | 52.04 | 60.68 | c | 72.31 | v | 70.89 | 83.13 | 83.40 | 83.39 | 80.82 | 64.34 | 54.67 | 54.26 | 66.95 | a | ||||||||||
1947 | 48.69 | 56.68 | 58.97 | 65.93 | a | 74.73 | 79.95 | 87.97 | 82.87 | 82.35 | 70.02 | 53.47 | 48.08 | a | 67.48 | |||||||||||
1948 | 51.80 | a | 50.94 | b | 54.58 | a | 67.38 | 73.37 | 80.19 | a | 86.52 | a | 85.11 | h | 82.50 | c | 72.37 | 54.73 | 51.42 | a | 65.98 | a | ||||
1949 | 41.73 | c | 50.84 | c | 57.78 | b | 66.18 | 73.04 | c | 82.72 | 86.34 | 86.00 | 84.00 | 68.21 | 65.63 | 51.48 | 67.83 | |||||||||
1950 | 50.53 | 57.09 | 60.18 | 69.93 | 70.84 | 81.02 | 84.16 | 86.00 | a | 79.43 | 77.97 | 64.95 | a | 58.60 | 70.06 | |||||||||||
1951 | 51.06 | 53.93 | 58.56 | 64.90 | ----- | z | 80.38 | i | 87.70 | c | 85.45 | b | 83.83 | 73.48 | 59.11 | b | 50.84 | 66.89 | b | |||||||
1952 | 50.03 | 51.91 | b | 51.52 | 64.43 | 76.10 | 82.33 | 86.94 | 86.26 | 84.26 | a | 77.35 | 56.28 | 49.23 | a | 68.05 | ||||||||||
1953 | 55.12 | b | 51.70 | 58.85 | 64.05 | 67.90 | a | 82.00 | g | 86.79 | 85.78 | a | 83.30 | 71.67 | a | 61.83 | 49.85 | 66.99 | a | |||||||
1954 | 52.18 | a | 60.52 | a | 58.05 | 69.87 | 74.34 | 81.07 | 86.63 | 82.34 | 82.72 | 72.86 | b | 62.90 | a | 52.40 | b | 69.66 | ||||||||
1955 | 45.73 | 48.39 | 59.06 | 64.73 | h | 70.32 | a | 82.43 | c | 82.20 | d | 80.39 | 79.50 | c | 73.77 | 58.00 | 52.95 | c | 66.61 | a | ||||||
1956 | 54.67 | d | 50.30 | i | 61.30 | a | 64.04 | b | 74.89 | 84.65 | 84.09 | d | 82.64 | b | 83.38 | a | 69.20 | a | 57.00 | f | 53.45 | b | 71.23 | b | ||
1957 | 54.83 | g | 60.82 | c | 59.58 | a | 64.37 | 70.26 | 85.37 | 88.79 | 86.40 | 82.54 | c | 69.10 | e | 55.91 | c | 55.32 | 70.77 | a | ||||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 54.66 | 52.30 | 60.36 | b | 70.60 | 71.76 | b | 86.45 | 88.03 | b | 82.81 | e | 80.57 | b | 72.40 | b | 59.70 | c | 52.06 | d | 69.31 | |||||
1960 | 46.33 | e | 49.39 | k | 61.59 | h | 68.37 | k | 73.88 | f | 85.96 | f | 88.02 | b | 85.62 | k | 82.37 | c | 70.18 | 62.24 | c | 50.73 | 66.64 | f | ||
1961 | 53.67 | a | 54.61 | 59.32 | 67.42 | 72.10 | 84.78 | a | 85.76 | 81.45 | 76.27 | 67.85 | 55.73 | o | 51.66 | 68.63 | a | |||||||||
1962 | 49.90 | 55.84 | 54.63 | 72.08 | 79.62 | s | 83.32 | h | 87.27 | 88.98 | 82.02 | 71.10 | a | 61.58 | f | 54.67 | b | 68.50 | c | |||||||
1963 | 47.70 | a | 58.98 | 57.38 | c | 65.10 | f | 77.02 | c | 79.73 | b | 88.38 | a | 83.64 | c | 83.28 | j | 74.65 | h | 59.62 | m | ----- | z | 70.40 | e | |
1964 | 46.48 | h | 47.00 | g | 53.77 | g | 64.04 | f | 72.29 | g | 82.19 | a | 86.71 | b | 80.96 | f | 78.12 | e | 73.80 | d | 53.43 | g | 52.18 | i | 80.20 | h |
1965 | 51.93 | i | 50.76 | g | 53.74 | f | 63.54 | g | 68.83 | j | 75.38 | j | 84.36 | i | 84.17 | j | 78.21 | i | 75.24 | l | 63.64 | h | 51.40 | e | 51.40 | k |
1966 | 46.57 | j | 48.42 | d | 60.27 | e | 67.33 | c | 74.98 | h | 81.77 | d | 86.60 | b | 84.25 | g | 79.90 | d | 68.17 | d | 59.76 | i | 52.34 | f | 70.35 | e |
1967 | 50.50 | i | 55.43 | f | 61.63 | h | 60.67 | l | 71.52 | g | 77.95 | 84.50 | h | 83.22 | d | 79.11 | c | 70.13 | e | 64.43 | i | 45.68 | 71.22 | g | ||
1968 | 49.82 | 55.24 | 56.98 | 63.48 | b | 73.53 | 83.57 | 84.92 | 81.48 | 80.36 | b | 69.60 | 57.19 | d | 47.97 | 67.01 | ||||||||||
1969 | 54.09 | b | 51.30 | 55.10 | e | 66.00 | d | 74.40 | e | ----- | z | 83.70 | u | 83.16 | l | 80.12 | q | 67.81 | j | 57.56 | m | 53.36 | m | 60.18 | g | |
1970 | 50.18 | n | 56.61 | j | 54.60 | j | 59.52 | i | 72.12 | k | 80.92 | k | 85.36 | i | 82.62 | k | 76.16 | k | 62.91 | i | 58.44 | l | 49.64 | j | ----- | z |
1971 | 47.35 | k | 51.68 | k | 57.24 | j | 60.33 | i | 66.92 | l | 75.89 | g | 83.70 | h | 76.50 | i | 75.37 | k | 61.56 | n | 52.30 | j | 42.48 | k | ----- | z |
1972 | 45.42 | k | 49.79 | j | 60.76 | j | 67.55 | k | 73.17 | m | 82.34 | h | 88.03 | l | 84.30 | h | 80.28 | j | 70.19 | o | 54.32 | k | 46.67 | s | ----- | z |
1973 | 50.23 | p | 52.75 | j | 51.10 | g | 61.02 | d | 74.69 | e | 83.87 | g | 86.20 | c | 85.44 | e | 79.90 | e | 72.07 | i | 60.93 | b | 56.46 | r | 74.70 | f |
1974 | 52.17 | h | 53.17 | a | 59.67 | p | 67.78 | j | 73.45 | 86.65 | g | 83.65 | n | 85.98 | i | 80.17 | o | 71.21 | j | 58.87 | k | 48.10 | j | 63.31 | j | |
1975 | 51.07 | h | 51.45 | g | 55.62 | j | 58.57 | 70.62 | c | 81.00 | n | 86.00 | n | 83.40 | j | 78.00 | x | ----- | z | ----- | z | ----- | z | 64.60 | j | |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.54 | c | 51.54 | k |
1999 | 55.03 | a | 58.48 | b | 61.93 | b | 61.95 | a | 73.13 | a | 82.96 | d | 85.12 | c | 86.20 | c | 82.78 | e | 75.10 | e | 64.90 | a | 52.76 | h | 71.60 | a |
2000 | 56.13 | d | 58.48 | f | 59.16 | f | 70.19 | c | 77.18 | f | 85.36 | b | 88.46 | h | 85.38 | k | 84.10 | f | 70.19 | m | 52.95 | k | 54.39 | h | 70.56 | i |
2001 | 50.64 | m | 52.86 | g | 55.76 | n | 66.97 | k | 78.61 | m | 85.16 | k | 87.66 | i | 86.94 | n | 83.83 | i | 74.26 | d | 64.82 | h | 51.36 | c | 62.81 | j |
2002 | 53.24 | f | 56.44 | j | 60.35 | g | 70.38 | f | 73.63 | h | 86.67 | f | 88.42 | g | 88.16 | i | 84.34 | b | 70.12 | k | 62.40 | f | 52.61 | h | 84.34 | k |
2003 | 59.43 | j | 56.11 | e | 60.02 | j | 63.41 | g | 76.54 | c | 82.62 | j | 88.13 | l | 84.00 | l | ----- | z | 76.58 | l | 59.38 | i | 55.33 | h | 66.32 | j |
2004 | 51.76 | j | 51.71 | e | 67.14 | m | 66.60 | j | 77.34 | l | 82.63 | d | 86.43 | i | 83.69 | o | 81.78 | n | 69.33 | j | 56.35 | f | 51.20 | k | 67.17 | j |
2005 | 54.23 | p | 54.55 | h | 59.52 | f | 66.70 | h | 75.52 | f | 82.70 | h | 90.60 | g | 84.75 | e | 84.38 | f | 72.44 | f | 62.78 | c | 54.37 | d | 67.30 | i |
2006 | 54.28 | a | 56.94 | c | 56.80 | d | 67.62 | d | 79.35 | e | 88.74 | e | 90.30 | h | 85.09 | d | 77.55 | i | 72.06 | g | 64.65 | c | 53.20 | i | 69.18 | d |
2007 | 50.31 | d | 57.28 | c | 64.35 | d | 68.40 | f | 77.91 | i | 86.27 | f | 88.70 | f | 86.25 | k | 81.12 | e | 71.77 | g | 67.04 | c | 48.86 | c | 61.49 | f |
2008 | 50.50 | g | 53.58 | k | 61.46 | c | 68.07 | c | 71.33 | k | 82.06 | v | ----- | z | 85.28 | o | ----- | z | 72.08 | m | 63.09 | a | 52.27 | 61.22 | h | |
2009 | 55.59 | b | 56.50 | b | 63.31 | 68.77 | b | 78.15 | d | 81.27 | 90.63 | a | 89.24 | 83.83 | a | 69.77 | 62.62 | a | 50.36 | x | 72.70 | a | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 51.39 | 54.35 | 58.45 | 65.62 | 73.01 | 82.65 | 86.40 | 84.27 | 81.25 | 70.87 | 59.83 | 52.17 | 68.19 | |||||||||||||
S.D. | 3.22 | 3.33 | 2.85 | 3.14 | 2.86 | 2.51 | 1.90 | 2.09 | 2.07 | 3.16 | 3.66 | 2.87 | 1.19 | |||||||||||||
SKEW | -0.70 | 0.02 | -0.09 | 0.01 | -0.06 | 0.14 | -0.21 | 0.42 | -0.35 | 0.07 | 0.09 | 0.09 | 0.31 | |||||||||||||
MAX | 56.27 | 60.82 | 64.35 | 72.08 | 79.35 | 88.74 | 90.63 | 89.24 | 84.34 | 77.97 | 67.04 | 58.60 | 70.06 | |||||||||||||
MIN | 41.73 | 48.39 | 51.52 | 58.57 | 66.65 | 77.95 | 82.20 | 80.39 | 76.27 | 64.34 | 53.47 | 45.68 | 66.44 | |||||||||||||
YRS | 35 | 35 | 36 | 34 | 34 | 32 | 31 | 34 | 35 | 33 | 34 | 37 | 12 |