YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1895 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 101.38 | e | 97.00 | 86.00 | 69.53 | 62.94 | 83.37 | g | ||||
1896 | 68.58 | 70.34 | 75.74 | 78.67 | 89.61 | 105.10 | 100.19 | 100.68 | 95.47 | 83.26 | 73.43 | 68.84 | 84.16 | |||||||||||||
1897 | 61.94 | 63.32 | 67.26 | 84.77 | 93.81 | 98.57 | 103.10 | 102.03 | 95.80 | 82.13 | 76.73 | 63.97 | 82.78 | |||||||||||||
1898 | 57.87 | 73.71 | 70.87 | 86.63 | 87.84 | 100.20 | 104.06 | 101.19 | 99.17 | 88.58 | 72.83 | 60.65 | 83.63 | |||||||||||||
1899 | 63.26 | 66.86 | 74.35 | 83.77 | 86.35 | 99.07 | 103.74 | 101.00 | 101.33 | 82.13 | 74.80 | 67.13 | 83.65 | |||||||||||||
1900 | 70.45 | 71.11 | 79.90 | 75.10 | 93.06 | 102.23 | 104.61 | 101.10 | 93.60 | 85.26 | 76.73 | 68.55 | 85.14 | |||||||||||||
1901 | 66.16 | 67.93 | 74.06 | 81.17 | 90.00 | 99.00 | 106.23 | 103.23 | 98.43 | 88.35 | 79.10 | 68.35 | 85.17 | |||||||||||||
1902 | 66.90 | 71.07 | 71.00 | 85.93 | 90.42 | 103.40 | 103.00 | 102.29 | 97.67 | 89.58 | 70.37 | 64.16 | 84.65 | |||||||||||||
1903 | 65.26 | 61.43 | 73.90 | 81.03 | 89.87 | 101.37 | 103.68 | 103.32 | 94.93 | 87.55 | 78.80 | 68.58 | 84.14 | |||||||||||||
1904 | 64.35 | 74.69 | 77.06 | 84.80 | 92.10 | 102.23 | 102.74 | 99.81 | 93.80 | 85.68 | 79.63 | 65.90 | 85.23 | |||||||||||||
1905 | 66.97 | 65.07 | 70.48 | 76.73 | 85.94 | 100.03 | 104.90 | 103.00 | 97.50 | 87.26 | 69.10 | 62.35 | 82.45 | |||||||||||||
1906 | 64.10 | 69.32 | 73.77 | 78.93 | 88.94 | 100.70 | 104.68 | 97.81 | 97.30 | 87.61 | 72.83 | 65.42 | 83.45 | |||||||||||||
1907 | 62.55 | 71.86 | 73.29 | 83.73 | 87.61 | 97.00 | 102.58 | 99.87 | 97.43 | 82.68 | 72.60 | 67.19 | 83.20 | |||||||||||||
1908 | 66.87 | 65.79 | 75.16 | 82.63 | 86.61 | 98.50 | 101.26 | 99.61 | 96.60 | 81.97 | 74.73 | 64.39 | 82.84 | |||||||||||||
1909 | 67.58 | 66.64 | 69.48 | 82.30 | 88.39 | 100.50 | 101.87 | 97.71 | 93.97 | 87.65 | 74.73 | 59.16 | 82.50 | |||||||||||||
1910 | 64.10 | 68.57 | 80.23 | 85.50 | 95.35 | 100.90 | 103.32 | 101.97 | 100.60 | 87.26 | 73.50 | 67.97 | 85.77 | |||||||||||||
1911 | 66.81 | 63.86 | 77.19 | 82.03 | 90.35 | 98.97 | 97.94 | 101.42 | 96.00 | 83.06 | 72.17 | 60.45 | 82.52 | |||||||||||||
1912 | 68.74 | 72.00 | 69.35 | 76.03 | 88.42 | 101.13 | 97.68 | 98.94 | 94.17 | 80.81 | 74.63 | 61.48 | 81.95 | |||||||||||||
1913 | 60.35 | 64.57 | 70.65 | 81.27 | 89.35 | 96.63 | 99.48 | 98.94 | 95.63 | 85.32 | 72.23 | 61.77 | 81.35 | |||||||||||||
1914 | 66.74 | 68.14 | 76.97 | 82.53 | 90.74 | 98.37 | 100.55 | 101.71 | 97.60 | 83.52 | 76.37 | 59.26 | 83.54 | |||||||||||||
1915 | 61.03 | 64.32 | 71.48 | 79.33 | 84.77 | 98.87 | 99.61 | 102.45 | 93.73 | 90.32 | 74.13 | 63.39 | 81.95 | |||||||||||||
1916 | 59.71 | 72.66 | 77.81 | 82.70 | 89.32 | 101.13 | 102.68 | 100.48 | 94.87 | 81.35 | 74.27 | 61.65 | 83.22 | |||||||||||||
1917 | 60.29 | 69.39 | 72.06 | 79.63 | 83.71 | 103.37 | 102.90 | 101.90 | 97.33 | 91.68 | 79.50 | 72.81 | 84.55 | |||||||||||||
1918 | 63.48 | 69.39 | 75.61 | 83.27 | 87.84 | 104.60 | 101.71 | 97.74 | 97.90 | 87.19 | 71.03 | 61.97 | 83.48 | |||||||||||||
1919 | 66.00 | 63.75 | 71.32 | 85.63 | 92.16 | 103.27 | 99.77 | 101.16 | 93.97 | 80.74 | 71.30 | 68.84 | 83.16 | |||||||||||||
1920 | 65.10 | 68.52 | 72.23 | 79.50 | 92.39 | 100.43 | 106.35 | 99.94 | 95.77 | 82.45 | 74.67 | 64.81 | 83.51 | |||||||||||||
1921 | 66.48 | 73.29 | 79.29 | 82.50 | 89.35 | 101.37 | 101.26 | 99.13 | 97.70 | 90.10 | 78.40 | 68.23 | 85.59 | |||||||||||||
1922 | 61.71 | 67.75 | 70.26 | 77.87 | 93.32 | 103.30 | 104.00 | 102.42 | 99.27 | 88.06 | 70.73 | 67.35 | 83.84 | |||||||||||||
1923 | 70.16 | 68.14 | 72.74 | 80.67 | 94.10 | 98.30 | 101.84 | 99.00 | 94.33 | 83.77 | 71.00 | 61.84 | 82.99 | |||||||||||||
1924 | 65.61 | 74.93 | 70.00 | 79.63 | 95.00 | 104.90 | 103.00 | 103.42 | 100.57 | 88.19 | 80.10 | 61.77 | 85.59 | |||||||||||||
1925 | 67.84 | 76.43 | 80.97 | 86.77 | 96.65 | 100.50 | 105.90 | 100.03 | 95.53 | 81.39 | 72.87 | 67.19 | 86.01 | |||||||||||||
1926 | 63.90 | 73.64 | 77.13 | 80.33 | 91.10 | 102.80 | 103.00 | 102.58 | 97.03 | 89.10 | 77.77 | 62.42 | 85.07 | |||||||||||||
1927 | 70.71 | 70.39 | 72.94 | 82.20 | 92.61 | 99.00 | 105.06 | 100.32 | 95.67 | 87.90 | 78.17 | 63.00 | 84.83 | |||||||||||||
1928 | 69.19 | 69.00 | 78.61 | 83.27 | 93.71 | 101.10 | 105.39 | 101.35 | 100.00 | 87.13 | 73.80 | 64.84 | 85.62 | |||||||||||||
1929 | 62.77 | 65.93 | 74.65 | 80.83 | 93.84 | 103.50 | 103.84 | 102.16 | 97.33 | 89.68 | 74.10 | 72.74 | 85.11 | |||||||||||||
1930 | 62.35 | 75.64 | 74.00 | 86.63 | 86.00 | 102.27 | 103.48 | 102.61 | 96.73 | 86.58 | 73.63 | 66.84 | 84.73 | |||||||||||||
1931 | 67.94 | 67.82 | 77.48 | 86.03 | 96.16 | 101.33 | 107.48 | 101.00 | 98.93 | 88.06 | 68.47 | 61.90 | 85.22 | |||||||||||||
1932 | 60.26 | 68.03 | 76.10 | 84.93 | 92.87 | 100.87 | 104.23 | 105.03 | 101.70 | 85.55 | 80.17 | 60.19 | 84.99 | |||||||||||||
1933 | 61.52 | 63.50 | 77.00 | 79.07 | 87.58 | 102.67 | 107.52 | 105.32 | 99.93 | 90.52 | 79.43 | 68.97 | 85.25 | |||||||||||||
1934 | 69.19 | 74.57 | 85.65 | 90.03 | 98.87 | 98.87 | 106.84 | 101.13 | 99.03 | 91.45 | 75.73 | 68.39 | 88.31 | |||||||||||||
1935 | 65.48 | 69.57 | 69.87 | 82.93 | 88.03 | 105.53 | 105.52 | 100.13 | 97.90 | 87.97 | 71.03 | 67.19 | 84.26 | |||||||||||||
1936 | 67.19 | 68.17 | 79.29 | 88.70 | 98.16 | 105.63 | 106.06 | 103.23 | 96.97 | 87.06 | 75.53 | 65.71 | 86.81 | |||||||||||||
1937 | 54.39 | 68.00 | 72.94 | 83.17 | 94.81 | 100.90 | 105.03 | 104.77 | 99.90 | 91.13 | 77.93 | 69.71 | 85.22 | |||||||||||||
1938 | 68.84 | 67.93 | 71.90 | 84.37 | 91.48 | 101.40 | 103.77 | 103.03 | 101.20 | 87.16 | 71.87 | 68.97 | 85.16 | |||||||||||||
1939 | 64.65 | 60.46 | 77.23 | 86.67 | 94.74 | 101.90 | 105.52 | 102.39 | 94.20 | 86.87 | 77.77 | 72.32 | 85.39 | |||||||||||||
1940 | 68.77 | 69.55 | 79.23 | 83.97 | 97.03 | 103.83 | 106.06 | 103.87 | 97.77 | 87.19 | 72.60 | 67.65 | 86.46 | |||||||||||||
1941 | 65.61 | 68.71 | 71.81 | 75.57 | 90.94 | 98.50 | 103.71 | 100.29 | 95.47 | 81.45 | 77.43 | 65.65 | 82.93 | |||||||||||||
1942 | 67.71 | 66.43 | 74.16 | 80.03 | 91.52 | 101.80 | 106.55 | 101.35 | 100.13 | 86.23 | 78.87 | 69.81 | 85.38 | |||||||||||||
1943 | 65.74 | 73.89 | 77.71 | 87.53 | 94.26 | 98.80 | 105.39 | 99.26 | 100.23 | 87.06 | 78.13 | 65.06 | 86.09 | |||||||||||||
1944 | 65.23 | 63.83 | 71.48 | 78.23 | 90.16 | 97.20 | 104.39 | 104.77 | 97.10 | 89.87 | 70.27 | 67.45 | 83.33 | |||||||||||||
1945 | 64.13 | 69.21 | 69.29 | 82.03 | 91.45 | 98.57 | 103.87 | 101.97 | 99.07 | 88.48 | 75.43 | 64.71 | 84.02 | |||||||||||||
1946 | 63.16 | 69.54 | 77.13 | 88.73 | 91.87 | 104.13 | 103.03 | 101.87 | 97.53 | 80.97 | 69.13 | 69.10 | 84.68 | |||||||||||||
1947 | 64.03 | 75.18 | 77.68 | 83.77 | 94.42 | 99.23 | 106.61 | 100.84 | 101.40 | 88.19 | 69.10 | 63.39 | 85.32 | |||||||||||||
1948 | 68.94 | 66.31 | 69.10 | 85.00 | 92.90 | 100.43 | 104.65 | 104.35 | 100.30 | 87.74 | 72.27 | 63.87 | 84.65 | |||||||||||||
1949 | 53.48 | 66.14 | 74.23 | 86.33 | 91.35 | 100.60 | 103.03 | 103.68 | 99.63 | 83.94 | 82.30 | 66.06 | 84.23 | |||||||||||||
1950 | 64.06 | 74.07 | 77.81 | 88.07 | 91.23 | 100.83 | 100.48 | 104.90 | 95.80 | 95.06 | 80.87 | 74.45 | 87.30 | |||||||||||||
1951 | 66.19 | 69.14 | 74.65 | 81.67 | 92.32 | 99.83 | 106.00 | 99.42 | 100.13 | 88.06 | 72.90 | 63.87 | 84.52 | |||||||||||||
1952 | 64.16 | 68.38 | 67.58 | 80.50 | 95.97 | 101.20 | 103.52 | 103.13 | 100.67 | 95.81 | 69.83 | 64.39 | 84.59 | |||||||||||||
1953 | 70.90 | 69.32 | 77.13 | 81.33 | 86.03 | 101.83 | 102.90 | 103.77 | 102.83 | 88.48 | 77.80 | 65.55 | 85.66 | |||||||||||||
1954 | 67.48 | 77.89 | 73.10 | 89.13 | 94.68 | 99.73 | 103.39 | 100.39 | 100.13 | 90.87 | 80.53 | 68.00 | 87.11 | |||||||||||||
1955 | 59.13 | 65.61 | 75.84 | 81.83 | 89.52 | 100.03 | 100.55 | 98.61 | 99.93 | 92.74 | 74.63 | 71.19 | 84.14 | |||||||||||||
1956 | 70.29 | 64.41 | 80.03 | 81.40 | 94.45 | 103.80 | 103.06 | 101.81 | 102.53 | 86.74 | 75.43 | 69.17 | b | 86.09 | ||||||||||||
1957 | 62.94 | 73.64 | 74.61 | 80.63 | 87.32 | 103.23 | 105.39 | 100.32 | 98.70 | 81.52 | 68.73 | 68.55 | 83.80 | |||||||||||||
1958 | 67.06 | 70.36 | 68.39 | 81.83 | 98.13 | 102.43 | 106.39 | 102.19 | 96.23 | d | 88.38 | b | 75.57 | 74.23 | a | 85.93 | ||||||||||
1959 | 70.24 | b | 67.15 | a | 78.32 | 87.93 | 90.26 | 105.07 | 106.41 | b | 99.74 | 98.03 | a | 89.20 | a | 75.60 | 66.20 | a | 86.18 | |||||||
1960 | 60.65 | 64.93 | 79.84 | 85.75 | b | 92.23 | 105.32 | b | 106.32 | 103.03 | 101.33 | 84.17 | a | 77.17 | 66.97 | 85.64 | ||||||||||
1961 | 69.87 | 73.04 | 75.13 | 84.70 | 92.29 | 104.57 | b | 104.00 | 101.94 | 94.37 | 87.06 | 70.47 | 65.07 | a | 85.21 | |||||||||||
1962 | 64.52 | 69.32 | 70.55 | 89.53 | 89.42 | 100.40 | 104.84 | 106.61 | 97.62 | a | 89.00 | 79.63 | 69.94 | 85.95 | ||||||||||||
1963 | 63.65 | 76.00 | 75.77 | 79.70 | 95.83 | a | 97.73 | 105.77 | 99.87 | 100.10 | 91.19 | 75.27 | 69.23 | 85.84 | ||||||||||||
1964 | 63.55 | 67.31 | 71.10 | 80.80 | 90.55 | 99.67 | 105.10 | a | 99.16 | 95.60 | 91.68 | 70.53 | 66.55 | 83.47 | ||||||||||||
1965 | 66.84 | 68.18 | 71.10 | a | 79.23 | 88.45 | 95.47 | 103.90 | 103.26 | 95.10 | 91.81 | 76.77 | 65.13 | 83.77 | ||||||||||||
1966 | 62.65 | 64.00 | 77.61 | 86.50 | 95.81 | 101.87 | 104.52 | 103.35 | 96.60 | 87.48 | 77.67 | 68.00 | 85.50 | |||||||||||||
1967 | 67.16 | 73.07 | 77.74 | 76.07 | 90.42 | 96.50 | 103.61 | 103.16 | 97.53 | 91.03 | 80.07 | 60.84 | 84.77 | |||||||||||||
1968 | 66.32 | 73.38 | 74.45 | 81.48 | i | 92.21 | c | 102.17 | a | 103.45 | b | 99.64 | q | ----- | z | ----- | z | ----- | z | ----- | z | 85.33 | f | |||
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 | 97.83 | l | 83.10 | 70.80 | 64.58 | 72.83 | i | |||
1973 | 63.84 | 69.32 | 68.29 | 82.80 | 96.84 | 104.27 | 106.65 | 105.90 | 100.73 | 92.16 | 75.77 | 70.87 | 86.45 | |||||||||||||
1974 | 66.71 | 73.07 | 79.42 | 86.93 | a | 95.97 | 108.43 | 104.87 | 105.06 | 99.90 | 88.84 | 76.45 | a | 64.29 | 87.50 | |||||||||||
1975 | 67.65 | 70.54 | 74.97 | 78.53 | 92.32 | 102.10 | 105.77 | 106.48 | b | 100.86 | a | 89.68 | 78.10 | 69.10 | 86.34 | |||||||||||
1976 | 70.97 | 74.62 | 76.77 | 83.77 | 95.65 | 104.13 | 104.55 | 105.16 | 96.40 | 85.94 | 79.10 | 70.35 | 87.28 | |||||||||||||
1977 | 66.74 | 77.39 | 76.10 | 89.47 | 91.03 | 106.47 | 107.42 | 105.68 | 100.43 | 92.94 | 80.90 | 72.58 | 88.93 | |||||||||||||
1978 | 67.10 | 69.79 | 78.84 | 84.10 | 94.52 | 106.97 | 108.00 | 104.37 | a | 99.10 | 93.00 | 73.00 | 62.90 | 86.81 | ||||||||||||
1979 | 60.35 | 70.89 | 74.68 | 86.53 | 92.65 | 104.47 | 107.55 | 103.29 | 104.20 | 92.23 | 74.10 | 71.97 | 86.91 | |||||||||||||
1980 | 68.29 | 73.86 | a | 74.48 | 85.60 | 90.29 | 105.37 | 109.13 | 104.48 | 101.83 | 90.48 | 79.50 | 76.10 | 88.28 | ||||||||||||
1981 | 72.16 | 76.64 | 76.61 | 90.03 | 93.16 | 106.67 | 106.90 | 107.16 | 101.45 | a | 87.23 | 80.53 | 72.48 | 89.25 | ||||||||||||
1982 | 66.53 | a | 73.04 | 74.74 | 85.87 | 93.81 | 101.72 | a | 104.81 | 104.71 | 99.57 | ----- | z | 69.00 | t | 64.70 | d | 86.95 | b | |||||||
1983 | 68.43 | c | 69.29 | 73.13 | 79.21 | b | 94.87 | 102.41 | a | 106.97 | 103.81 | 101.27 | 88.23 | a | 75.07 | 68.35 | 85.92 | |||||||||
1984 | 70.26 | d | 74.65 | c | 82.48 | 85.48 | a | 98.91 | h | 103.64 | e | 104.10 | 103.00 | b | 100.47 | 84.29 | 75.90 | 65.00 | f | 88.43 | b | |||||
1985 | 65.30 | a | 71.18 | ----- | z | 91.00 | 97.45 | 106.96 | b | 107.65 | 107.00 | a | 95.83 | 88.42 | 74.03 | 70.13 | 88.63 | a | ||||||||
1986 | 76.10 | a | 74.62 | d | 82.94 | 88.21 | a | 96.65 | 106.00 | 104.68 | 106.00 | a | 95.63 | 87.77 | 77.45 | a | 68.97 | 88.75 | ||||||||
1987 | 68.42 | 70.96 | 76.03 | 91.00 | 93.53 | a | 105.50 | 106.03 | 103.35 | 98.66 | a | 92.81 | 75.10 | a | 64.35 | 87.15 | ||||||||||
1988 | 66.97 | 75.50 | a | 80.10 | a | 85.43 | 94.55 | 105.03 | 106.16 | 103.58 | 99.13 | 94.10 | 75.52 | a | 67.03 | 87.76 | ||||||||||
1989 | 66.68 | 73.68 | 83.73 | a | 93.47 | 95.74 | 103.37 | 107.81 | 103.42 | 101.37 | 88.79 | b | 79.30 | 69.68 | 88.92 | |||||||||||
1990 | 67.97 | 69.14 | 78.71 | 87.40 | 92.37 | a | 106.10 | 103.62 | b | 101.32 | 98.70 | 91.52 | 79.11 | b | 65.27 | a | 86.77 | |||||||||
1991 | 66.90 | 78.18 | 71.27 | a | 84.90 | 91.22 | h | 99.27 | 104.58 | 104.29 | 99.30 | 92.32 | 75.97 | 67.20 | a | 85.83 | a | |||||||||
1992 | 66.97 | 72.14 | 74.60 | a | 89.73 | 94.39 | 102.20 | 104.30 | a | 103.07 | a | 101.67 | 91.94 | 73.70 | 62.90 | 86.47 | ||||||||||
1993 | 66.70 | a | 68.36 | 77.87 | 86.66 | a | 96.16 | 103.00 | a | 104.10 | 103.42 | 100.60 | 88.35 | 74.03 | 68.68 | 86.49 | ||||||||||
1994 | 70.84 | 69.65 | b | 79.45 | 86.33 | 92.13 | 107.00 | 106.39 | 107.23 | 100.73 | h | 86.91 | i | 70.88 | e | 67.23 | e | 85.71 | b | |||||||
1995 | 64.77 | e | ----- | z | ----- | z | 82.57 | g | 90.28 | m | 102.17 | g | 107.29 | ----- | z | ----- | z | 92.14 | b | 82.19 | c | 70.45 | b | 83.37 | g | |
1996 | 70.28 | b | 74.84 | d | 78.70 | a | 87.74 | c | 97.89 | d | 105.90 | 107.54 | c | 105.15 | e | ----- | z | ----- | z | 77.92 | d | 68.77 | a | 87.47 | b | |
1997 | 66.15 | d | 70.16 | c | 83.79 | b | 82.89 | c | 98.45 | 102.11 | b | 106.11 | d | 104.36 | c | 100.88 | d | 86.86 | b | 75.57 | 63.00 | a | 86.69 | |||
1998 | 67.64 | c | 62.83 | d | 72.43 | c | 79.30 | c | 89.81 | d | 98.86 | b | ----- | z | 105.34 | b | 98.89 | b | 86.27 | a | ----- | z | ----- | z | 84.60 | c |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 65.76 | 69.90 | 75.18 | 83.61 | 92.15 | 101.88 | 104.36 | 102.38 | 98.23 | 87.71 | 75.24 | 66.57 | 85.15 | |||||||||||||
S.D. | 3.62 | 3.96 | 3.91 | 3.87 | 3.37 | 2.77 | 2.26 | 2.26 | 2.47 | 3.48 | 3.45 | 3.60 | 1.71 | |||||||||||||
SKEW | -0.61 | -0.03 | 0.17 | 0.03 | -0.17 | 0.09 | -0.62 | 0.05 | -0.06 | -0.16 | -0.05 | 0.15 | 0.22 | |||||||||||||
MAX | 76.10 | 78.18 | 85.65 | 93.47 | 98.87 | 108.43 | 109.13 | 107.23 | 104.20 | 95.81 | 82.30 | 76.10 | 89.25 | |||||||||||||
MIN | 53.48 | 60.46 | 67.26 | 75.10 | 83.71 | 95.47 | 97.68 | 97.71 | 93.60 | 80.74 | 68.47 | 59.16 | 81.35 | |||||||||||||
YRS | 99 | 98 | 97 | 97 | 96 | 98 | 98 | 98 | 96 | 97 | 98 | 98 | 90 |