YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1912 | 68.68 | 71.17 | 69.65 | 75.07 | 88.26 | 99.33 | 95.26 | 95.16 | 93.57 | 80.23 | 73.93 | 61.90 | 81.02 | |||||||||||||
1913 | 61.87 | 63.39 | 71.42 | 81.23 | 90.35 | 96.97 | 98.13 | 97.00 | 92.87 | 84.97 | 72.23 | 60.71 | 80.93 | |||||||||||||
1914 | 69.39 | 68.11 | 75.81 | 83.27 | 91.32 | 97.80 | 96.23 | 98.35 | 94.33 | 81.48 | 74.87 | 59.26 | 82.52 | |||||||||||||
1915 | 60.61 | 64.75 | 68.97 | 78.33 | 85.87 | 99.60 | 99.52 | 99.61 | 93.90 | 89.90 | 75.27 | 65.19 | 81.79 | |||||||||||||
1916 | 62.35 | 73.28 | 77.55 | 82.40 | 90.77 | 101.77 | 99.19 | 95.16 | 94.10 | 85.78 | v | ----- | z | ----- | z | 86.29 | c | |||||||||
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 | 92.53 | o | 89.97 | 74.17 | 67.71 | 77.28 | i | |||
1935 | 67.35 | 67.00 | 70.13 | 81.53 | 85.58 | 101.47 | 101.68 | 94.87 | 92.53 | 87.32 | 71.80 | 65.87 | 82.26 | |||||||||||||
1936 | 65.37 | a | 66.07 | 74.68 | 86.13 | 95.32 | 103.10 | 101.87 | 97.13 | 92.47 | 85.35 | 72.87 | 64.55 | 83.74 | ||||||||||||
1937 | 55.03 | b | 67.96 | 71.55 | 83.23 | 94.00 | 99.83 | 101.32 | 100.42 | 96.93 | 92.19 | j | 79.07 | 68.65 | 83.45 | a | ||||||||||
1938 | 68.06 | 68.39 | 73.32 | 84.43 | 91.81 | 100.37 | 99.06 | 98.65 | 96.37 | 87.42 | 72.37 | 68.60 | a | 84.07 | ||||||||||||
1939 | 63.58 | 58.07 | 75.42 | 84.70 | 93.19 | 101.40 | 100.58 | 98.07 | a | 93.27 | 83.87 | 74.53 | 72.87 | 83.30 | ||||||||||||
1940 | 67.13 | 67.10 | 76.87 | 82.33 | 93.81 | 99.63 | 102.77 | 98.48 | 94.67 | 85.13 | 71.13 | 68.13 | 83.93 | |||||||||||||
1941 | 64.16 | 68.11 | 70.10 | 75.17 | 90.55 | 97.90 | 100.97 | a | 96.87 | 93.47 | 81.94 | 76.53 | 65.35 | 81.76 | ||||||||||||
1942 | 67.23 | 64.96 | 71.45 | 79.67 | 91.81 | 101.80 | 104.10 | 98.26 | 95.67 | 83.32 | 78.97 | 69.06 | 83.86 | |||||||||||||
1943 | 66.06 | 73.54 | 75.97 | 87.62 | a | 93.23 | 98.03 | 102.06 | 96.26 | 96.50 | 85.83 | a | 76.73 | 64.97 | 84.73 | |||||||||||
1944 | 64.03 | 63.79 | 69.74 | 77.93 | 89.55 | 97.60 | 101.16 | 99.71 | 93.73 | 87.84 | 68.97 | 66.00 | 81.67 | |||||||||||||
1945 | 64.19 | 68.61 | 69.35 | 80.70 | 91.13 | a | 97.67 | 100.55 | 98.13 | 96.80 | 86.10 | 76.73 | 66.00 | 83.00 | ||||||||||||
1946 | 60.48 | 70.07 | 76.29 | 87.57 | 90.35 | 103.60 | 99.77 | 96.65 | 93.87 | 80.94 | 71.38 | a | 69.71 | 83.39 | ||||||||||||
1947 | 63.29 | 73.68 | 76.55 | 81.87 | 93.39 | 98.90 | 103.35 | 96.35 | 97.27 | 87.03 | a | 68.61 | b | 62.70 | a | 83.58 | ||||||||||
1948 | 68.81 | 65.79 | 68.00 | 85.53 | 93.68 | 101.10 | 101.61 | 99.94 | 97.57 | 84.58 | 71.57 | 65.32 | 83.62 | |||||||||||||
1949 | 53.83 | a | 65.71 | 74.42 | 83.93 | 91.06 | 99.10 | 98.39 | 100.10 | 96.10 | 81.77 | 81.77 | 65.68 | 82.66 | ||||||||||||
1950 | 65.23 | a | 72.36 | 76.23 | 86.37 | 89.39 | 98.60 | 94.48 | 99.32 | 93.37 | 93.81 | 81.86 | a | 75.39 | 85.53 | |||||||||||
1951 | 65.58 | 68.86 | 73.65 | 80.87 | 91.52 | 99.03 | 103.61 | 98.16 | 99.57 | 87.35 | 71.97 | 63.65 | 83.65 | |||||||||||||
1952 | 64.61 | 66.45 | 65.13 | 80.40 | 94.29 | 100.97 | 101.77 | 98.74 | 99.23 | 94.16 | 69.83 | 63.42 | 83.25 | |||||||||||||
1953 | 70.06 | 67.43 | 74.39 | 80.83 | 85.42 | 101.93 | 99.42 | 101.29 | 99.63 | 86.52 | 76.97 | 63.39 | 83.94 | |||||||||||||
1954 | 67.55 | 75.21 | 71.77 | a | 86.93 | 91.97 | 98.90 | 99.52 | 95.80 | a | 96.93 | 88.94 | 79.07 | 70.00 | a | 85.22 | ||||||||||
1955 | 59.39 | 64.57 | 74.74 | 81.63 | 88.13 | 99.13 | 97.94 | 93.16 | 97.63 | 90.45 | 74.79 | b | 71.52 | 82.76 | ||||||||||||
1956 | 70.87 | 61.83 | 77.81 | 79.53 | 93.26 | 102.37 | 99.48 | 97.58 | 99.69 | a | 87.35 | 73.71 | b | 67.83 | b | 84.28 | ||||||||||
1957 | 64.03 | 72.89 | 70.87 | 78.93 | b | 85.68 | 101.00 | 101.71 | 97.62 | b | 96.76 | a | 81.10 | 66.45 | a | 67.74 | 82.06 | |||||||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 69.81 | 66.39 | 75.68 | 85.30 | 89.61 | 101.77 | 100.87 | a | 94.03 | 95.80 | 86.68 | 72.47 | 65.42 | 83.65 | ||||||||||||
1960 | 59.94 | 62.34 | 77.97 | 83.83 | 90.65 | 102.73 | 102.10 | 99.32 | 98.67 | i | 84.32 | 76.77 | 64.93 | b | 82.26 | a | ||||||||||
1961 | 66.97 | 70.04 | 74.19 | 82.80 | 91.39 | 101.50 | 100.81 | 97.03 | 92.73 | 85.45 | 68.80 | 63.06 | 82.90 | |||||||||||||
1962 | 62.29 | 68.46 | 68.45 | 87.90 | 89.45 | 98.47 | 99.39 | 102.84 | 96.10 | 86.61 | 78.50 | 67.84 | 83.86 | |||||||||||||
1963 | 62.97 | 72.71 | 73.17 | b | 79.87 | 94.06 | 97.34 | a | 102.29 | 95.35 | 97.23 | 89.48 | 72.86 | b | 68.84 | 83.85 | ||||||||||
1964 | 63.63 | a | 63.76 | 68.06 | 78.30 | 90.19 | 98.40 | 100.90 | a | 93.74 | 90.39 | b | 89.00 | 70.33 | 66.68 | 81.12 | ||||||||||
1965 | 67.06 | 66.73 | b | 70.39 | 77.96 | g | 88.13 | 94.77 | 100.74 | 99.94 | 93.10 | 89.29 | 77.17 | 64.10 | 82.86 | a | ||||||||||
1966 | 61.84 | 60.07 | 75.26 | 82.73 | 92.39 | 99.83 | 100.13 | 97.06 | 92.13 | 85.29 | 77.70 | 67.81 | 82.69 | |||||||||||||
1967 | 67.19 | 72.50 | 78.52 | 78.53 | 88.58 | 95.57 | 98.19 | 98.29 | 94.83 | 88.00 | 78.30 | 61.03 | 83.29 | |||||||||||||
1968 | 65.55 | 71.59 | 71.42 | 77.90 | 90.03 | 100.70 | 98.81 | 93.94 | 96.67 | 89.32 | 72.37 | 65.26 | 82.80 | |||||||||||||
1969 | 68.42 | 66.18 | 68.87 | 84.13 | 92.23 | 98.13 | 100.52 | 102.32 | 97.40 | 83.90 | 71.87 | 66.97 | 83.41 | |||||||||||||
1970 | 65.19 | 71.50 | 68.61 | 76.80 | 92.03 | 100.70 | 101.81 | 99.52 | 91.33 | 81.74 | 77.53 | 66.35 | 82.76 | |||||||||||||
1971 | 67.26 | 68.14 | 77.45 | 80.27 | 87.13 | 98.33 | 102.77 | 94.26 | 94.93 | 78.10 | 72.67 | 60.06 | 81.78 | |||||||||||||
1972 | 67.77 | 72.83 | 83.52 | 83.63 | 90.68 | 98.00 | 101.97 | 97.19 | 94.63 | 80.61 | 67.10 | 62.77 | 83.39 | |||||||||||||
1973 | 61.29 | 65.86 | 62.87 | 75.87 | 91.03 | 99.43 | 101.55 | 102.77 | 98.53 | 90.32 | 75.73 | 69.74 | 82.92 | |||||||||||||
1974 | 64.48 | 69.14 | 76.58 | 83.30 | 93.35 | 105.07 | 98.58 | 98.68 | 93.97 | 83.58 | 72.90 | 62.13 | 83.48 | |||||||||||||
1975 | 65.58 | 66.71 | 70.81 | 75.07 | 88.19 | 99.53 | 99.52 | 102.48 | 95.30 | 87.29 | 76.93 | 67.77 | 82.93 | |||||||||||||
1976 | 67.87 | 71.76 | 74.06 | 80.83 | 91.58 | 101.43 | 98.61 | 101.23 | 91.77 | 81.77 | 74.57 | 67.77 | 83.61 | |||||||||||||
1977 | 61.81 | 72.00 | 70.29 | 82.50 | 86.74 | 102.00 | 101.81 | 101.00 | 97.03 | 87.55 | 77.53 | 70.94 | 84.27 | |||||||||||||
1978 | 64.39 | 65.32 | 73.23 | 81.90 | 89.58 | 104.27 | 104.23 | 99.58 | 95.63 | 89.00 | 70.37 | 60.97 | 83.20 | |||||||||||||
1979 | 57.90 | a | 68.36 | 69.77 | 82.63 | 88.48 | 100.23 | 103.77 | 97.26 | 99.67 | 90.74 | 72.57 | 70.61 | 83.50 | ||||||||||||
1980 | 66.00 | 70.14 | 70.29 | 81.33 | 87.55 | 104.63 | 104.00 | 98.65 | 97.23 | 86.06 | 76.67 | 74.84 | 84.78 | |||||||||||||
1981 | 69.32 | 73.18 | 70.06 | 85.37 | 89.58 | 103.07 | 99.68 | 100.84 | 97.20 | 85.13 | 80.20 | 71.65 | 85.44 | |||||||||||||
1982 | 64.00 | 67.89 | 72.00 | 82.57 | 88.84 | 99.33 | 100.61 | 98.48 | 94.03 | 85.97 | a | 70.60 | 62.68 | 82.25 | ||||||||||||
1983 | 65.71 | 65.82 | 68.42 | 74.33 | 89.61 | 97.93 | 101.97 | 98.19 | 97.70 | 80.90 | 69.93 | 65.29 | 81.32 | |||||||||||||
1984 | 64.55 | 69.34 | 76.71 | 79.20 | 96.68 | 98.70 | 96.42 | 93.87 | 94.17 | 78.84 | 73.27 | 62.90 | 82.05 | |||||||||||||
1985 | 61.16 | 65.68 | 72.97 | a | 83.67 | 92.26 | 102.47 | 102.52 | 100.26 | 91.40 | 83.29 | 71.53 | 68.19 | 82.95 | ||||||||||||
1986 | 73.52 | 69.36 | 77.23 | 84.27 | 93.35 | 102.33 | 97.61 | 98.29 | 92.87 | 83.90 | 72.87 | 65.10 | 84.22 | |||||||||||||
1987 | 65.13 | a | 66.61 | 70.23 | 84.67 | 88.90 | 101.83 | 102.81 | 97.97 | a | 94.33 | 89.71 | 72.63 | 62.39 | 83.10 | |||||||||||
1988 | 64.77 | 71.52 | 76.52 | 80.80 | 91.74 | 101.00 | 101.35 | 98.13 | 95.10 | 89.48 | 74.07 | 64.90 | 84.12 | |||||||||||||
1989 | 63.42 | 73.00 | 81.00 | 91.17 | 94.10 | 101.77 | 103.94 | 98.84 | 98.53 | 84.48 | 76.37 | 66.61 | 86.10 | |||||||||||||
1990 | 65.19 | 65.00 | 75.06 | 83.40 | 90.19 | 104.30 | 96.32 | 93.42 | 94.27 | 87.06 | 75.87 | 63.58 | 82.81 | |||||||||||||
1991 | 63.94 | 73.18 | 67.19 | 80.77 | 90.42 | 97.77 | 100.74 | 99.58 | 94.23 | 89.65 | 72.30 | 63.81 | 82.80 | |||||||||||||
1992 | 62.48 | 67.69 | 70.97 | 84.60 | 90.71 | 99.77 | 100.32 | 97.71 | 97.13 | 90.06 | 71.67 | 62.65 | 82.98 | |||||||||||||
1993 | 64.42 | 65.18 | 73.68 | 83.37 | 92.84 | 101.03 | 100.45 | 98.29 | 95.60 | 85.32 | 72.27 | 66.65 | 83.26 | |||||||||||||
1994 | 69.39 | 67.75 | 74.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.66 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 64.86 | 68.17 | 72.94 | 81.96 | 90.75 | 100.21 | 100.53 | 98.05 | 95.35 | 86.01 | 74.02 | 66.09 | 83.22 | |||||||||||||
S.D. | 3.54 | 3.59 | 3.83 | 3.45 | 2.47 | 2.19 | 2.18 | 2.35 | 2.28 | 3.50 | 3.42 | 3.45 | 1.09 | |||||||||||||
SKEW | -0.56 | -0.25 | 0.06 | -0.11 | -0.17 | 0.06 | -0.58 | -0.16 | 0.07 | -0.09 | 0.18 | 0.46 | 0.15 | |||||||||||||
MAX | 73.52 | 75.21 | 83.52 | 91.17 | 96.68 | 105.07 | 104.23 | 102.84 | 99.69 | 94.16 | 81.86 | 75.39 | 86.10 | |||||||||||||
MIN | 53.83 | 58.07 | 62.87 | 74.33 | 85.42 | 94.77 | 94.48 | 93.16 | 90.39 | 78.10 | 66.45 | 59.26 | 80.93 | |||||||||||||
YRS | 64 | 64 | 64 | 62 | 63 | 63 | 63 | 63 | 62 | 62 | 63 | 63 | 59 |