YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | 53.90 | b | 57.59 | a | 68.90 | 73.20 | 82.55 | 90.63 | 93.39 | 90.19 | 91.90 | 85.39 | 69.70 | 64.52 | 76.82 | |||||||||||
1956 | 65.32 | 59.96 | b | 75.23 | 75.79 | a | 84.71 | 94.33 | 95.48 | 93.55 | 94.97 | 79.29 | 69.03 | a | 62.29 | 79.16 | ||||||||||
1957 | 54.74 | 67.64 | 67.17 | a | 72.40 | 77.58 | 94.33 | 97.10 | 93.29 | 91.57 | 74.00 | 60.30 | 64.00 | 76.18 | ||||||||||||
1958 | 61.13 | 62.61 | 57.74 | 71.27 | 87.84 | 93.13 | 98.40 | a | 95.81 | 88.37 | 80.32 | 67.67 | 69.06 | 77.78 | ||||||||||||
1959 | 62.52 | 57.96 | a | 70.23 | 79.03 | 80.50 | a | 95.57 | 99.03 | 90.10 | 87.03 | 81.97 | 69.30 | 59.52 | 77.73 | |||||||||||
1960 | 52.74 | 55.57 | a | 70.03 | 76.23 | 84.00 | 96.80 | 99.13 | 96.39 | 92.23 | 75.52 | 67.63 | 60.90 | 77.27 | ||||||||||||
1961 | 63.53 | a | 63.36 | 66.16 | 76.17 | 82.97 | 96.33 | 97.03 | b | 93.19 | 85.30 | 78.52 | 62.43 | 56.61 | 76.80 | |||||||||||
1962 | 57.74 | 59.64 | 61.26 | 80.24 | a | 79.84 | 92.03 | 95.81 | 98.48 | 91.37 | c | 80.15 | d | 72.08 | e | 66.09 | i | 78.97 | a | |||||||
1963 | 57.70 | a | 69.36 | c | 67.75 | g | 68.93 | o | 87.94 | 90.62 | a | 99.74 | 91.45 | b | 89.61 | b | 84.18 | c | 72.50 | b | 67.72 | b | 81.08 | b | ||
1964 | 59.00 | c | 60.08 | d | 65.44 | f | 75.64 | b | 87.96 | e | 92.14 | h | 99.32 | c | 95.18 | c | 91.00 | f | 84.63 | d | 67.38 | a | 61.41 | b | 76.73 | c |
1965 | 64.81 | d | 64.46 | b | 62.78 | d | 69.36 | b | 81.13 | 89.22 | c | ----- | z | ----- | z | ----- | z | ----- | z | 59.17 | x | 58.10 | 69.98 | e | ||
1966 | 56.31 | b | 57.30 | a | 71.00 | a | 78.60 | 87.41 | d | 94.62 | a | 98.70 | a | 98.21 | c | 90.21 | f | 80.33 | g | 70.41 | a | 59.80 | a | 77.24 | b | |
1967 | 61.28 | b | 66.93 | 69.30 | a | 66.83 | a | 83.71 | 88.37 | 97.03 | a | 95.84 | 88.43 | 84.44 | d | 71.97 | 52.81 | 77.24 | ||||||||
1968 | 59.35 | 66.52 | 66.94 | 71.63 | 84.20 | a | 95.31 | a | 94.87 | 89.63 | a | 91.79 | b | 82.48 | 67.38 | a | 58.48 | 77.38 | ||||||||
1969 | 60.73 | a | 57.18 | 64.87 | a | 75.87 | 86.71 | 91.07 | a | 97.03 | 99.16 | 93.28 | e | 76.00 | 66.48 | a | 62.66 | b | 77.59 | |||||||
1970 | 59.90 | 65.75 | 62.97 | b | 70.10 | 85.48 | b | 94.62 | a | 98.83 | b | 95.23 | a | 88.48 | c | 76.84 | 69.69 | a | 58.27 | a | 77.18 | |||||
1971 | 61.80 | a | 63.22 | a | 71.39 | 74.03 | a | 78.55 | 93.18 | b | 101.00 | c | 91.45 | 91.43 | b | 71.22 | h | 66.60 | 52.07 | c | 76.79 | a | ||||
1972 | 60.97 | a | 68.11 | a | 77.97 | a | 78.89 | c | 84.90 | 93.87 | 101.61 | 97.00 | g | 88.86 | a | 72.32 | 61.87 | 55.59 | b | 76.81 | a | |||||
1973 | 54.54 | c | 57.78 | a | 56.48 | 70.31 | a | 85.67 | a | 94.97 | 98.94 | 97.16 | 92.75 | f | 82.74 | 67.57 | b | 63.37 | a | 75.41 | a | |||||
1974 | 56.77 | 62.86 | 68.41 | b | 76.10 | a | 86.65 | 101.10 | 97.35 | 96.55 | b | 91.31 | a | 78.77 | 67.75 | b | 56.93 | a | 78.38 | |||||||
1975 | 60.65 | 61.11 | 62.06 | 67.07 | 82.27 | a | 93.90 | a | 97.93 | a | 97.94 | 92.53 | 80.42 | 68.93 | b | 66.00 | 77.57 | |||||||||
1976 | 63.35 | 64.03 | 64.97 | 71.17 | 84.97 | 94.87 | 97.03 | 96.36 | c | 85.57 | 77.06 | 71.30 | 63.45 | 77.84 | ||||||||||||
1977 | 57.80 | a | 67.89 | 63.81 | 77.30 | 76.39 | 96.17 | 98.26 | 95.77 | 90.17 | 81.38 | b | 72.00 | 64.84 | 78.48 | |||||||||||
1978 | 58.84 | 59.61 | 66.94 | 70.66 | a | 83.94 | 96.20 | 99.93 | a | 96.06 | 89.90 | a | 83.94 | 63.80 | 55.55 | 77.11 | ||||||||||
1979 | 49.77 | 60.14 | 62.55 | 73.60 | 81.87 | 93.50 | 99.29 | 92.58 | 96.04 | b | 83.16 | 65.33 | 65.19 | 76.92 | ||||||||||||
1980 | 57.81 | 63.59 | 61.84 | 73.90 | 77.84 | 94.63 | 99.87 | 95.45 | 92.62 | a | 81.39 | 72.17 | 69.26 | 78.36 | ||||||||||||
1981 | 64.19 | 66.43 | 64.52 | 79.40 | 83.84 | 98.67 | 99.03 | 98.00 | 90.33 | 75.52 | 71.40 | 63.81 | 79.59 | |||||||||||||
1982 | 58.81 | d | 62.42 | b | 62.82 | c | 73.41 | c | 82.57 | a | 91.48 | a | 96.68 | c | 94.03 | 88.00 | b | 78.52 | 63.90 | a | 56.50 | c | 75.76 | |||
1983 | 61.68 | 59.70 | a | 62.73 | a | 67.50 | f | 84.47 | a | 91.50 | 97.77 | 93.38 | b | 91.44 | c | 77.87 | 65.72 | a | 60.34 | b | 76.97 | a | ||||
1984 | 61.70 | a | 65.39 | a | 71.65 | 75.15 | d | 92.35 | 93.29 | b | 95.90 | b | 93.17 | a | 90.93 | 74.20 | a | 66.43 | b | 56.00 | b | 78.01 | ||||
1985 | 56.55 | b | 60.41 | a | 66.00 | e | 79.20 | 84.74 | 96.38 | a | 97.71 | 97.06 | 84.50 | 77.45 | 62.70 | 63.57 | a | 77.19 | ||||||||
1986 | 67.77 | 63.75 | 70.19 | 74.70 | 85.13 | 95.82 | b | 94.03 | a | 94.47 | a | 83.18 | b | 74.93 | a | 68.27 | 59.77 | a | 77.67 | |||||||
1987 | 59.06 | 61.30 | a | 64.55 | b | 79.96 | b | 82.90 | a | 96.07 | o | 95.37 | a | ----- | z | ----- | z | 80.87 | 64.17 | 54.84 | 71.45 | c | ||||
1988 | 58.16 | 65.89 | a | 69.65 | 73.25 | b | 84.46 | c | 94.18 | b | 97.21 | b | 91.24 | f | 87.03 | 85.29 | 66.43 | 58.84 | 76.40 | a | ||||||
1989 | 58.07 | b | 63.56 | a | 73.17 | a | 82.87 | 83.41 | d | 91.30 | 96.72 | b | 94.29 | 92.17 | 79.77 | 71.23 | 64.00 | 79.21 | ||||||||
1990 | 58.27 | a | 61.16 | c | 69.31 | b | 76.15 | c | 81.97 | a | 97.38 | a | 95.00 | a | 91.65 | 87.30 | 81.00 | b | 68.70 | 55.48 | 76.95 | |||||
1991 | 57.32 | 69.59 | a | 59.26 | d | 72.43 | b | 80.11 | c | 87.76 | a | 95.71 | 94.82 | c | 89.71 | b | 83.06 | 66.86 | a | 58.39 | 76.25 | |||||
1992 | 59.55 | 62.34 | 61.81 | 76.77 | 79.43 | a | 86.00 | 89.69 | b | 86.84 | 86.20 | 76.97 | 60.80 | 51.40 | a | 73.15 | ||||||||||
1993 | 52.10 | a | 55.35 | b | 66.65 | 74.66 | a | 83.17 | a | 89.93 | 91.69 | b | 93.04 | h | 89.66 | a | 78.60 | a | 65.70 | 61.65 | 73.56 | a | ||||
1994 | 64.23 | 60.56 | a | 70.53 | a | 76.38 | a | 82.38 | b | 98.52 | a | 98.97 | a | 98.74 | 91.66 | a | 77.14 | b | 61.17 | 59.43 | a | 78.31 | ||||
1995 | 57.52 | b | 67.32 | 65.07 | b | 70.57 | 78.21 | b | 90.96 | b | 99.06 | 99.38 | b | 92.50 | 84.16 | 75.70 | 62.87 | 78.61 | ||||||||
1996 | 62.87 | 66.54 | c | 70.55 | b | 79.48 | a | 87.68 | 97.18 | b | 100.41 | d | 97.13 | h | 82.47 | m | 78.35 | 69.41 | a | 61.47 | a | 77.39 | b | |||
1997 | 58.62 | b | 61.54 | 74.60 | a | 71.85 | c | 90.30 | a | 91.38 | a | 96.74 | 95.79 | b | 90.10 | 77.39 | c | 67.64 | e | 58.67 | p | 79.63 | a | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 59.29 | 62.64 | 66.68 | 74.67 | 83.60 | 93.69 | 97.38 | 94.77 | 89.93 | 79.65 | 67.56 | 60.41 | 77.47 | |||||||||||||
S.D. | 3.71 | 3.76 | 4.76 | 3.71 | 3.43 | 3.15 | 2.40 | 2.93 | 2.85 | 3.44 | 3.56 | 4.40 | 1.23 | |||||||||||||
SKEW | -0.21 | -0.02 | 0.10 | -0.05 | 0.08 | -0.19 | -0.98 | -0.58 | -0.34 | -0.07 | -0.17 | -0.04 | -1.28 | |||||||||||||
MAX | 67.77 | 69.59 | 77.97 | 82.87 | 92.35 | 101.10 | 101.61 | 99.38 | 96.04 | 85.39 | 75.70 | 69.26 | 79.59 | |||||||||||||
MIN | 49.77 | 55.35 | 56.48 | 66.83 | 76.39 | 86.00 | 89.69 | 86.84 | 83.18 | 72.32 | 60.30 | 51.40 | 73.15 | |||||||||||||
YRS | 43 | 43 | 41 | 41 | 43 | 41 | 42 | 37 | 37 | 40 | 42 | 41 | 29 |