YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | ----- | 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 | 66.50 | t | 66.26 | 71.67 | 76.90 | 93.00 | 96.00 | 91.06 | 90.86 | a | 72.58 | 60.63 | 61.29 | 78.03 | b | |||||||||
1958 | 59.10 | 62.36 | 58.42 | 71.83 | 87.19 | 93.10 | 97.13 | 95.55 | 87.13 | 77.58 | 64.77 | 65.48 | 76.64 | |||||||||||||
1959 | 61.74 | 59.46 | 70.77 | 78.30 | 81.90 | 96.40 | 97.94 | 90.55 | 87.97 | 79.42 | 67.18 | h | 57.71 | 78.38 | a | |||||||||||
1960 | 52.19 | 56.69 | 72.13 | 77.68 | b | 85.97 | a | 98.03 | 99.42 | 98.10 | a | 93.83 | 75.18 | c | 67.79 | b | 57.56 | d | 77.88 | |||||||
1961 | 61.81 | 65.64 | 67.83 | a | 77.53 | 85.65 | 97.28 | a | 98.61 | 94.52 | 85.97 | 77.48 | 63.43 | b | 54.87 | 77.55 | ||||||||||
1962 | 57.52 | 60.79 | 62.39 | 81.40 | 80.52 | 93.80 | 96.39 | 98.00 | 89.07 | 79.10 | 70.72 | a | 62.45 | 77.68 | ||||||||||||
1963 | 56.10 | 68.25 | 66.81 | 72.33 | 86.74 | 89.57 | 100.03 | a | 89.58 | 91.27 | 80.68 | 65.48 | a | 60.35 | e | 77.27 | ||||||||||
1964 | 54.65 | 57.84 | d | 61.56 | d | 72.03 | 83.13 | a | 89.87 | g | 97.44 | d | 93.22 | d | 88.17 | g | 84.68 | c | 60.64 | b | 56.20 | k | 73.91 | c | ||
1965 | 60.48 | f | 62.41 | a | 61.00 | e | 68.60 | e | 78.13 | h | 84.17 | f | 95.24 | f | 94.77 | i | 85.08 | d | 83.91 | i | 69.00 | f | 55.33 | j | 69.27 | h |
1966 | 56.53 | l | 58.68 | i | 71.62 | g | 79.63 | k | 86.18 | i | 90.96 | f | 97.39 | h | 95.09 | i | 87.21 | k | 77.24 | j | 69.05 | h | 58.00 | j | ----- | z |
1967 | 59.32 | i | 69.05 | f | 73.29 | g | 69.50 | h | 83.88 | g | 89.67 | f | 96.96 | f | 95.04 | c | 89.14 | i | 83.12 | n | 70.00 | k | 49.95 | j | 95.04 | k |
1968 | 54.46 | e | 66.55 | g | 68.08 | e | 72.50 | j | 85.04 | f | 95.38 | f | 97.26 | l | 90.92 | f | 91.05 | i | 81.57 | j | 65.57 | 54.90 | 60.75 | h | ||
1969 | 58.39 | 56.70 | a | 61.77 | 75.63 | 84.58 | 90.07 | a | 96.97 | 97.23 | 89.67 | 74.48 | 65.13 | 59.65 | 75.86 | |||||||||||
1970 | 57.06 | 65.26 | a | 63.48 | 68.87 | 85.00 | 93.70 | 98.61 | 95.35 | 84.77 | 73.20 | a | 69.54 | b | 56.87 | 75.98 | ||||||||||
1971 | 60.65 | 62.39 | 70.84 | 72.63 | 77.80 | a | 92.40 | 98.68 | 91.48 | 88.83 | 70.19 | 63.13 | 50.94 | 75.00 | ||||||||||||
1972 | 59.63 | a | 65.86 | 77.10 | 76.67 | 83.32 | 90.37 | 97.06 | 92.03 | a | 86.50 | 69.48 | 58.63 | 51.26 | 75.66 | |||||||||||
1973 | 52.17 | a | 54.96 | 52.77 | a | 69.54 | f | 82.97 | 92.97 | 97.76 | b | 95.21 | c | 89.89 | c | 80.38 | g | 65.27 | d | 59.44 | f | 76.00 | c | |||
1974 | 53.39 | 60.79 | 66.41 | b | 75.17 | 85.48 | b | 100.10 | 94.45 | 93.13 | 88.00 | 76.96 | c | 64.46 | d | 52.65 | e | 75.92 | ||||||||
1975 | 55.00 | h | 57.61 | 59.16 | 65.83 | g | 78.09 | h | 90.96 | g | 94.64 | i | 96.00 | 88.10 | 78.13 | 66.90 | 59.19 | 72.16 | e | |||||||
1976 | 60.16 | 61.72 | 62.29 | 70.87 | 82.26 | 91.70 | 93.84 | 92.10 | 84.53 | 75.35 | 69.13 | 59.55 | 75.29 | |||||||||||||
1977 | 56.06 | 66.39 | 64.19 | 76.10 | 76.48 | 95.80 | 95.19 | 93.90 | 88.93 | 79.13 | 70.80 | 62.42 | 77.12 | |||||||||||||
1978 | 56.90 | 58.79 | 66.79 | b | 71.80 | 81.48 | 95.23 | 98.84 | 92.64 | c | 88.27 | 82.45 | 66.67 | i | 50.84 | 76.73 | a | |||||||||
1979 | 47.79 | c | 58.75 | 63.97 | 74.13 | 80.90 | 94.10 | 100.30 | d | 96.84 | 95.83 | 84.81 | 64.87 | 61.35 | 76.97 | |||||||||||
1980 | 55.84 | 62.17 | 61.00 | a | 74.27 | 77.80 | a | 93.30 | 97.90 | a | 93.52 | 89.90 | 80.90 | 70.47 | 65.38 | e | 76.87 | |||||||||
1981 | 61.16 | 65.48 | a | 61.84 | 79.27 | 82.71 | 96.97 | 97.26 | 95.48 | 87.53 | 73.65 | 70.40 | 61.48 | 77.77 | ||||||||||||
1982 | 55.20 | a | 60.56 | a | 63.70 | d | 73.50 | b | 81.23 | a | 91.07 | a | 95.87 | 93.41 | b | 85.76 | a | 76.00 | 61.00 | b | 54.93 | a | 74.35 | |||
1983 | 59.97 | 59.68 | 62.97 | 66.88 | d | 82.90 | a | 90.90 | 95.40 | a | 92.65 | 93.21 | b | 76.29 | 63.66 | a | 56.40 | a | 75.08 | |||||||
1984 | 58.32 | c | 64.11 | b | 70.21 | b | 73.14 | a | 90.55 | 92.00 | d | 94.63 | d | 91.63 | d | 89.74 | c | 73.13 | a | 67.54 | b | 53.97 | a | 76.58 | ||
1985 | 56.29 | 59.93 | a | 64.86 | c | 78.24 | a | 84.11 | c | 96.96 | b | 97.48 | 96.03 | a | 83.97 | 77.10 | 63.33 | 60.52 | d | 76.57 | ||||||
1986 | 66.77 | 63.08 | b | 70.50 | c | 74.93 | 84.93 | c | 94.41 | a | 93.41 | b | 94.93 | b | 82.97 | a | 76.37 | d | 67.33 | c | 56.97 | b | 77.22 | |||
1987 | 57.60 | a | 60.52 | a | 64.32 | 78.54 | b | 82.17 | a | 95.96 | c | 95.32 | 92.77 | 89.33 | 82.10 | a | 65.37 | c | 54.26 | d | 76.52 | |||||
1988 | 57.84 | 66.17 | 70.53 | a | 75.00 | 84.03 | b | 95.11 | b | 96.39 | 91.60 | a | 86.07 | b | 84.23 | 68.36 | b | 57.59 | i | 79.58 | a | |||||
1989 | 58.10 | b | 64.04 | e | 78.19 | e | 84.22 | c | 87.45 | 94.73 | 99.52 | b | 94.11 | c | 91.60 | e | 79.81 | 71.24 | a | 63.31 | r | 82.09 | a | |||
1990 | 59.11 | c | 60.89 | a | 68.46 | e | 77.00 | e | 82.73 | a | 97.43 | 94.25 | c | 92.37 | a | 87.83 | 80.83 | b | 69.33 | 53.07 | d | 76.94 | ||||
1991 | 57.43 | c | 69.14 | f | 61.92 | g | 74.48 | c | 80.89 | d | 89.14 | b | 97.72 | f | 95.00 | 88.92 | e | 81.43 | a | 62.27 | d | 55.30 | d | 76.10 | c | |
1992 | 50.00 | s | 62.53 | l | 62.10 | k | 77.50 | h | 81.56 | f | 89.08 | f | 92.03 | b | 90.83 | a | 91.90 | 80.13 | a | 61.80 | 49.40 | a | 77.68 | f | ||
1993 | 53.72 | b | 54.64 | 67.40 | a | 76.46 | b | 85.06 | 92.77 | 93.07 | d | 93.36 | q | 90.60 | o | 78.55 | i | 65.60 | j | 61.16 | l | 74.73 | e | |||
1994 | 63.65 | e | 60.91 | e | 69.30 | h | 76.83 | f | 84.22 | m | 98.26 | g | 97.56 | d | 96.48 | 89.93 | 76.58 | 60.97 | 60.36 | i | 78.01 | e | ||||
1995 | 52.39 | h | 68.64 | f | 67.19 | o | 69.68 | k | 75.71 | g | 88.75 | f | 97.62 | e | 97.04 | d | 90.26 | g | 83.00 | h | 74.05 | j | 68.93 | p | 97.33 | j |
1996 | 62.88 | g | 65.81 | b | 67.33 | s | 79.83 | f | 90.23 | r | 95.75 | r | 98.48 | h | 96.11 | l | 85.00 | f | 77.88 | g | 71.89 | l | 62.00 | j | 65.81 | k |
1997 | 56.27 | i | 68.00 | n | 77.48 | h | 71.94 | l | 89.45 | t | 92.85 | q | 93.47 | l | 84.75 | w | 88.20 | y | 84.82 | n | 71.13 | o | 55.71 | n | ----- | z |
1998 | 60.39 | m | 57.40 | h | 65.95 | k | 57.67 | u | 78.50 | m | 82.36 | s | ----- | z | ----- | z | ----- | z | 81.78 | v | 68.12 | n | 53.29 | q | ----- | z |
1999 | 59.59 | n | 60.14 | n | 63.43 | q | 63.67 | u | 74.17 | s | 85.23 | q | 83.42 | s | 84.73 | t | 82.88 | v | 74.00 | y | 67.91 | s | 54.29 | q | ----- | z |
2000 | 61.22 | v | 59.87 | n | 58.77 | r | 73.20 | t | 85.33 | s | 91.33 | r | ----- | z | ----- | z | 95.39 | l | 75.22 | h | 56.70 | j | 63.17 | m | ----- | z |
2001 | 56.44 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | 70.90 | b | 83.20 | 92.23 | 103.30 | 103.97 | 102.94 | n | 91.97 | 78.45 | 68.67 | 56.23 | 83.21 | c | ||||||||
2003 | 66.71 | 61.21 | 68.00 | ----- | z | ----- | z | 98.13 | 103.56 | o | 99.10 | 95.32 | e | 89.05 | j | 64.20 | 60.16 | 76.60 | d | |||||||
2004 | 59.16 | 58.11 | a | 78.68 | 76.38 | a | 89.06 | 97.83 | 101.71 | 97.39 | 91.63 | 78.17 | a | 62.60 | 58.77 | 79.12 | ||||||||||
2005 | 58.71 | 59.89 | 65.68 | 75.73 | 87.97 | 94.90 | 103.55 | 95.03 | 92.77 | 81.97 | 72.03 | 63.13 | 79.28 | |||||||||||||
2006 | 64.16 | 69.32 | 64.62 | e | 78.47 | 91.85 | d | 101.90 | 99.48 | 95.29 | 88.50 | 78.94 | 73.34 | a | 59.58 | 80.45 | ||||||||||
2007 | 57.34 | b | 63.86 | 74.42 | 79.86 | h | 90.96 | d | 99.50 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.22 | g | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 58.02 | 61.66 | 66.42 | 75.23 | 84.08 | 94.83 | 97.33 | 94.26 | 89.04 | 77.97 | 65.97 | 57.61 | 76.86 | |||||||||||||
S.D. | 3.89 | 3.55 | 5.45 | 3.85 | 3.97 | 3.40 | 2.67 | 2.34 | 3.05 | 3.78 | 3.73 | 4.19 | 1.40 | |||||||||||||
SKEW | 0.06 | 0.09 | 0.25 | 0.14 | 0.19 | 0.46 | 0.40 | 0.04 | 0.19 | -0.23 | 0.08 | -0.08 | 0.60 | |||||||||||||
MAX | 66.77 | 69.32 | 78.68 | 84.22 | 92.23 | 103.30 | 103.97 | 99.10 | 95.83 | 84.81 | 73.34 | 65.48 | 80.45 | |||||||||||||
MIN | 47.79 | 54.64 | 52.77 | 66.88 | 76.48 | 89.14 | 92.03 | 89.58 | 82.97 | 69.48 | 58.63 | 49.40 | 74.35 | |||||||||||||
YRS | 37 | 38 | 39 | 35 | 36 | 36 | 37 | 39 | 38 | 36 | 37 | 34 | 25 |