YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1876 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1877 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1878 | 64.77 | 69.18 | 79.23 | 84.17 | 94.29 | 101.83 | 109.45 | 105.94 | 97.77 | 88.77 | 75.30 | 66.00 | 86.39 | |||||||||||||
1879 | 65.42 | 76.86 | 85.35 | 87.30 | 93.65 | 103.47 | 108.71 | 108.61 | 104.20 | 88.00 | 73.73 | 65.29 | 88.38 | |||||||||||||
1880 | 66.90 | 65.86 | 72.97 | 82.93 | 93.71 | 103.00 | 104.48 | 104.55 | 99.07 | 86.42 | 70.47 | 67.26 | 84.80 | |||||||||||||
1881 | 65.48 | 76.07 | 79.23 | 87.97 | 94.42 | 103.00 | 105.97 | 103.13 | 98.27 | 85.61 | 71.47 | 70.03 | 86.72 | |||||||||||||
1882 | 61.55 | 67.07 | 76.81 | 83.47 | 93.39 | 99.77 | 108.19 | 105.19 | 98.37 | 83.61 | 71.80 | 71.58 | 85.07 | |||||||||||||
1883 | 63.74 | 67.00 | 81.19 | 82.70 | 91.97 | 106.10 | 106.84 | 105.68 | 102.00 | 80.87 | 75.14 | a | 66.77 | 85.83 | ||||||||||||
1884 | 65.77 | 67.14 | 72.39 | 82.23 | 91.23 | 98.27 | 107.26 | 103.42 | 94.60 | 86.77 | 77.90 | 63.42 | 84.20 | |||||||||||||
1885 | 64.48 | 74.00 | 81.03 | 84.37 | 94.71 | 97.17 | 104.87 | 104.48 | 100.60 | 90.03 | 74.33 | 68.39 | 86.54 | |||||||||||||
1886 | 64.97 | 76.18 | 74.26 | 82.03 | 96.97 | 102.23 | 106.71 | 102.19 | 98.73 | 81.19 | 69.83 | 72.42 | 85.64 | |||||||||||||
1887 | 68.26 | 67.29 | 84.94 | 84.40 | 92.00 | 101.57 | 106.19 | 104.90 | 99.27 | 90.16 | 78.33 | 64.94 | 86.85 | |||||||||||||
1888 | 63.35 | 73.28 | 75.61 | 90.47 | 91.71 | 100.20 | 106.52 | 106.65 | 104.23 | 90.52 | 73.73 | 67.71 | 87.00 | |||||||||||||
1889 | 63.94 | 71.39 | 79.90 | 90.10 | 94.26 | 102.23 | 106.29 | 106.45 | 97.97 | 86.87 | 76.27 | 66.58 | 86.85 | |||||||||||||
1890 | 63.39 | 70.46 | 78.10 | 86.80 | 94.42 | 100.13 | 105.48 | 101.55 | 100.43 | 88.00 | 78.17 | 70.23 | 86.43 | |||||||||||||
1891 | 66.26 | 66.04 | 76.03 | 85.50 | 88.94 | 98.13 | 107.52 | 105.29 | 99.10 | 93.52 | 81.17 | 64.81 | 86.02 | |||||||||||||
1892 | 68.23 | 70.59 | 78.45 | 85.97 | 92.65 | 100.37 | 105.94 | 105.68 | 103.60 | 86.74 | 78.10 | 66.13 | 86.87 | |||||||||||||
1893 | 74.32 | 74.68 | 75.42 | 85.23 | 92.29 | 104.60 | 104.52 | 104.06 | 97.83 | 88.06 | 75.13 | 71.77 | 87.33 | |||||||||||||
1894 | 65.16 | 67.46 | 77.81 | 87.83 | 93.26 | 95.53 | 104.74 | 102.61 | 98.70 | 90.58 | 83.47 | 64.84 | 86.00 | |||||||||||||
1895 | 64.68 | 73.71 | 78.84 | 86.83 | 94.90 | 102.03 | 104.81 | 104.23 | 100.30 | 90.00 | 73.83 | 66.55 | 86.73 | |||||||||||||
1896 | 71.84 | 74.97 | 78.97 | 81.27 | 91.94 | 106.03 | 104.74 | 103.52 | 99.03 | 89.03 | 75.77 | 70.90 | 87.33 | |||||||||||||
1897 | 64.61 | 69.07 | 70.32 | 88.57 | 95.58 | 98.53 | 105.23 | 104.61 | 99.13 | 84.10 | 76.97 | 65.84 | 85.21 | |||||||||||||
1898 | 60.74 | 76.39 | 73.58 | 89.67 | 89.65 | 100.73 | 105.19 | 103.06 | 102.47 | 88.35 | 74.90 | 62.55 | 85.61 | |||||||||||||
1899 | 68.39 | 72.29 | 78.19 | 87.37 | 87.81 | 100.00 | 104.81 | 101.97 | 104.30 | 84.65 | 77.93 | 69.00 | 86.39 | |||||||||||||
1900 | 73.90 | 75.04 | 83.13 | 78.67 | 94.29 | 101.40 | 104.87 | 100.97 | 95.77 | h | 85.67 | j | 80.37 | 71.77 | 86.44 | b | ||||||||||
1901 | 67.55 | 70.68 | 79.13 | 84.30 | 90.13 | 98.93 | 105.29 | 103.87 | 98.50 | 90.03 | 81.37 | 70.61 | 86.70 | |||||||||||||
1902 | 68.48 | 74.39 | 73.87 | 87.80 | 90.74 | 102.10 | 101.90 | 103.23 | 99.83 | 89.50 | g | 71.90 | 65.45 | 85.43 | a | |||||||||||
1903 | 69.35 | 64.96 | 77.16 | 83.27 | 91.45 | 101.03 | 104.10 | 103.90 | 96.47 | 90.84 | 80.50 | 70.16 | 86.10 | |||||||||||||
1904 | 67.58 | 76.83 | 80.42 | 86.70 | 92.61 | 102.03 | 102.10 | 100.68 | 94.77 | 86.97 | 80.38 | a | 69.06 | 86.68 | ||||||||||||
1905 | 69.71 | 66.75 | 75.74 | 81.30 | 82.86 | j | 99.20 | 104.39 | 104.10 | 98.83 | 88.90 | 71.07 | 64.45 | 84.04 | a | |||||||||||
1906 | 67.19 | 72.57 | 76.58 | 80.97 | 88.84 | 99.43 | 104.48 | 101.52 | 98.80 | 90.35 | 75.03 | 67.77 | 85.30 | |||||||||||||
1907 | 65.23 | 77.71 | 75.39 | 85.50 | 88.84 | 96.40 | 103.00 | 101.73 | a | 99.90 | 86.52 | 76.87 | 71.58 | 85.72 | ||||||||||||
1908 | 69.35 | 69.21 | 80.58 | 88.47 | 90.23 | 100.90 | 105.77 | 104.52 | 98.80 | 85.58 | 78.45 | a | 64.90 | 86.40 | ||||||||||||
1909 | 70.94 | 71.71 | 74.03 | 86.60 | 92.35 | 102.53 | 106.10 | a | 100.55 | 97.45 | a | 88.74 | 76.43 | 60.94 | 85.70 | |||||||||||
1910 | 65.58 | 73.18 | 84.87 | 91.30 | 98.19 | 103.10 | 106.23 | 106.81 | 102.97 | 89.94 | 76.93 | a | 71.35 | 89.20 | ||||||||||||
1911 | 68.87 | 66.64 | 81.58 | 85.40 | 92.58 | 102.67 | 104.68 | 107.48 | 100.93 | 89.45 | 74.73 | 64.19 | 86.60 | |||||||||||||
1912 | 71.19 | 76.34 | 73.52 | 80.70 | 90.61 | 103.07 | 102.87 | 103.58 | 98.93 | 84.52 | 77.90 | 65.19 | 85.70 | |||||||||||||
1913 | 63.87 | 69.57 | 76.65 | 86.30 | 92.90 | 99.57 | 103.71 | 104.03 | 101.87 | 90.42 | 76.40 | 67.06 | 86.03 | |||||||||||||
1914 | 70.35 | 73.29 | 83.35 | 87.30 | 94.00 | 102.37 | 106.68 | 106.60 | a | 101.10 | 87.68 | 79.77 | 61.35 | 87.82 | ||||||||||||
1915 | 64.90 | 68.79 | 79.06 | 83.41 | c | 88.90 | 104.27 | 104.84 | 107.74 | 97.80 | 94.94 | 75.86 | a | 67.43 | a | 86.50 | ||||||||||
1916 | 64.00 | 77.07 | 84.58 | 89.50 | 93.81 | 104.50 | 105.29 | 103.74 | 99.03 | 84.00 | 75.10 | a | 63.61 | 87.02 | ||||||||||||
1917 | 62.54 | c | 71.15 | b | 76.42 | 84.27 | 87.13 | 106.50 | 104.73 | a | 105.55 | 101.00 | a | 93.77 | 80.70 | 74.74 | 87.38 | |||||||||
1918 | 68.55 | 71.50 | 79.74 | 87.07 | 89.74 | 106.07 | 105.84 | 100.97 | 100.33 | 87.60 | a | 73.87 | 65.84 | 86.43 | ||||||||||||
1919 | 68.90 | 69.04 | 75.19 | 89.47 | 93.45 | 104.30 | 104.40 | a | 105.29 | 97.77 | 83.62 | b | 73.28 | a | 68.74 | 86.12 | ||||||||||
1920 | 66.32 | 71.66 | 74.97 | 82.63 | 94.26 | 101.33 | 108.19 | 101.55 | 95.97 | 83.71 | 75.03 | a | 66.10 | 85.14 | ||||||||||||
1921 | 65.23 | 74.36 | 81.26 | 85.07 | a | 88.77 | a | 101.67 | 104.10 | 102.55 | 99.30 | 89.68 | 78.30 | 68.77 | 86.59 | |||||||||||
1922 | 61.77 | 68.64 | 74.39 | 81.00 | 95.29 | 103.23 | 105.45 | 104.61 | 102.87 | 89.58 | 72.80 | 69.55 | 85.77 | |||||||||||||
1923 | 71.32 | 71.46 | 77.10 | 82.70 | 96.23 | 97.93 | 103.35 | 103.57 | a | 96.03 | 86.35 | 74.70 | 63.32 | 85.34 | ||||||||||||
1924 | 66.19 | 77.76 | 73.84 | 82.43 | 97.10 | 105.87 | 106.52 | 106.32 | 102.67 | 87.52 | 78.33 | 64.45 | 87.42 | |||||||||||||
1925 | 67.37 | a | 77.46 | 81.35 | 86.73 | 95.52 | 100.43 | 106.81 | 104.39 | 99.33 | 82.87 | 73.20 | 68.19 | 86.97 | ||||||||||||
1926 | 66.29 | 75.71 | 81.03 | 86.77 | 94.19 | 104.53 | 106.61 | 104.74 | 100.00 | 91.00 | 79.60 | 62.26 | 87.73 | |||||||||||||
1927 | 68.58 | 73.82 | 77.10 | 86.43 | 95.35 | 101.30 | 106.35 | 104.03 | 98.70 | 90.19 | 77.57 | 63.87 | 86.94 | |||||||||||||
1928 | 69.45 | 71.93 | 81.87 | 86.97 | 95.06 | 102.43 | 106.68 | 104.58 | 103.20 | 88.81 | 75.77 | 66.87 | 87.80 | |||||||||||||
1929 | 65.45 | 70.18 | 78.29 | 82.90 | 96.03 | 102.43 | 106.07 | a | 104.77 | 98.17 | 91.39 | 75.20 | e | 74.57 | h | 88.26 | a | |||||||||
1930 | 64.45 | 78.14 | 78.13 | 88.90 | 87.58 | 102.53 | 105.55 | 104.45 | 97.70 | 88.06 | 77.13 | 66.87 | 86.63 | |||||||||||||
1931 | 69.06 | 70.57 | 82.48 | 88.97 | 97.87 | 100.67 | c | 108.24 | b | 102.58 | 98.60 | 88.26 | 71.40 | 64.19 | 86.91 | |||||||||||
1932 | 63.35 | 69.76 | 81.71 | j | 87.70 | 93.35 | 101.23 | 104.60 | a | 105.47 | a | 103.17 | 87.03 | 79.17 | 61.90 | 86.98 | a | |||||||||
1933 | 62.68 | 65.57 | 80.71 | 80.97 | a | 88.84 | 102.00 | 108.03 | 106.61 | 102.07 | 94.35 | 79.73 | 70.16 | 86.81 | ||||||||||||
1934 | 71.48 | 76.79 | 90.19 | 92.80 | 99.10 | 97.73 | 107.23 | 104.06 | 101.73 | 92.65 | 77.80 | 69.00 | 90.05 | |||||||||||||
1935 | 66.65 | 72.54 | 75.65 | 85.67 | 90.10 | 105.97 | 105.32 | 102.48 | 101.47 | 87.68 | 72.90 | 67.74 | 86.18 | |||||||||||||
1936 | 68.19 | 72.86 | 82.94 | 90.87 | 98.42 | 104.53 | 107.16 | 106.29 | 100.07 | 88.84 | 76.57 | 67.61 | 88.70 | |||||||||||||
1937 | 55.90 | 70.82 | 77.71 | 86.17 | 95.32 | 102.73 | 107.32 | 107.68 | 102.43 | g | 93.06 | 79.57 | 71.26 | 86.14 | a | |||||||||||
1938 | 70.77 | 70.07 | 75.10 | 86.73 | 94.03 | 102.07 | 105.71 | 104.71 | 102.83 | 87.74 | 72.47 | 69.26 | 86.79 | |||||||||||||
1939 | 66.29 | 64.71 | 79.97 | 90.73 | 95.97 | 103.10 | 107.27 | a | 106.45 | 95.20 | 87.97 | 78.60 | 73.65 | 87.49 | ||||||||||||
1940 | 70.84 | 72.10 | 82.74 | 87.63 | 99.26 | 104.83 | 108.13 | 106.71 | 99.10 | 89.61 | 74.00 | 69.03 | 88.67 | |||||||||||||
1941 | 66.61 | 73.85 | a | 77.06 | 80.27 | 95.77 | 99.63 | 107.10 | 101.77 | 97.50 | 84.35 | 78.57 | 68.97 | 85.96 | ||||||||||||
1942 | 69.81 | 70.32 | 77.84 | 82.40 | 93.71 | 103.50 | b | 110.29 | 104.90 | 103.17 | a | 90.94 | 80.67 | 72.45 | 88.33 | |||||||||||
1943 | 70.19 | 76.75 | 82.35 | 89.90 | 97.42 | 100.80 | 108.90 | 104.52 | 104.73 | 91.65 | 79.07 | 67.65 | 89.49 | |||||||||||||
1944 | 67.61 | 67.66 | 76.45 | 83.14 | a | 93.00 | 97.57 | 107.19 | 108.10 | 101.50 | 91.68 | 70.97 | a | 68.68 | 86.13 | |||||||||||
1945 | 67.00 | 72.29 | 73.55 | 85.28 | a | 93.65 | 100.70 | 107.87 | 105.23 | 101.63 | 91.00 | 76.60 | 67.16 | 86.83 | ||||||||||||
1946 | 67.97 | 72.82 | 79.29 | 91.07 | 94.23 | 105.90 | 106.42 | 106.26 | 101.97 | 84.94 | 72.47 | 70.00 | 87.78 | |||||||||||||
1947 | 66.65 | 77.96 | 80.32 | 87.13 | 96.55 | 101.14 | a | 108.90 | 104.06 | 103.03 | 90.77 | 72.40 | 65.65 | 87.88 | ||||||||||||
1948 | 71.03 | 70.52 | 73.10 | 87.67 | 94.39 | 101.13 | 106.35 | 107.42 | 102.77 | 89.23 | 73.87 | 64.10 | 86.80 | |||||||||||||
1949 | 56.06 | 68.25 | 76.35 | 89.90 | 92.68 | 103.03 | 106.48 | 105.65 | e | ----- | z | ----- | z | ----- | z | ----- | z | 87.30 | d | |||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 66.73 | 71.82 | 78.35 | 85.87 | 93.29 | 101.77 | 105.97 | 104.46 | 99.99 | 88.36 | 76.13 | 67.40 | 86.72 | |||||||||||||
S.D. | 3.43 | 3.64 | 3.68 | 3.14 | 2.87 | 2.46 | 1.68 | 1.90 | 2.43 | 3.02 | 3.07 | 3.08 | 1.11 | |||||||||||||
SKEW | -0.56 | -0.03 | 0.46 | -0.08 | -0.15 | -0.18 | 0.04 | -0.08 | -0.03 | -0.26 | 0.01 | 0.07 | 0.63 | |||||||||||||
MAX | 74.32 | 78.14 | 90.19 | 92.80 | 99.26 | 106.50 | 110.29 | 108.61 | 104.73 | 94.94 | 83.47 | 74.74 | 90.05 | |||||||||||||
MIN | 55.90 | 64.71 | 70.32 | 78.67 | 87.13 | 95.53 | 101.90 | 100.55 | 94.60 | 80.87 | 69.83 | 60.94 | 84.20 | |||||||||||||
YRS | 72 | 72 | 71 | 72 | 71 | 72 | 72 | 72 | 69 | 69 | 71 | 70 | 65 |