YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1893 | 73.23 | 67.00 | 65.19 | 75.97 | 82.84 | 92.87 | 95.35 | 96.03 | 83.83 | 77.48 | 69.67 | 69.35 | 79.07 | |||||||||||||
1894 | 63.74 | 64.29 | 71.87 | 83.73 | 82.07 | a | 84.07 | 98.71 | 96.35 | 91.57 | 85.45 | 83.37 | 59.90 | 80.43 | ||||||||||||
1895 | 59.87 | 68.93 | 68.97 | 75.30 | 83.19 | 90.60 | 92.77 | 94.03 | 90.63 | 87.56 | o | 69.90 | 66.03 | 78.20 | a | |||||||||||
1896 | 68.77 | 70.52 | h | 69.42 | 69.57 | 82.32 | 96.03 | 95.77 | 95.16 | 87.63 | 80.74 | 68.13 | 65.32 | 79.90 | a | |||||||||||
1897 | 59.84 | 59.41 | a | 61.77 | ----- | z | 82.29 | ----- | z | ----- | z | ----- | z | 86.90 | 71.71 | 72.97 | 63.55 | 69.80 | d | |||||||
1898 | 56.43 | a | 70.36 | 67.68 | ----- | z | ----- | z | ----- | z | 99.13 | 99.45 | 94.33 | 84.61 | 71.80 | 63.61 | 78.60 | c | ||||||||
1899 | 63.52 | 67.11 | 66.94 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 101.17 | 77.53 | a | 70.50 | 65.74 | 73.21 | e | ||||||
1900 | 65.71 | 69.71 | 76.42 | 70.62 | a | 84.81 | 93.40 | 98.58 | 91.06 | 84.37 | 80.16 | 75.03 | 68.17 | a | 79.84 | |||||||||||
1901 | 60.42 | 63.75 | 72.10 | 76.00 | 78.35 | 89.77 | 99.32 | 98.39 | 88.27 | 82.29 | 75.17 | 71.42 | 79.60 | |||||||||||||
1902 | 67.35 | 67.68 | 65.74 | 76.30 | 79.10 | 93.47 | 93.35 | 93.74 | 94.20 | 80.94 | 66.93 | 64.35 | 78.60 | |||||||||||||
1903 | 65.68 | 60.43 | 65.84 | 68.67 | 78.42 | 90.07 | 96.65 | 96.35 | 86.31 | a | 85.42 | 77.00 | ----- | z | 79.17 | a | ||||||||||
1904 | ----- | z | ----- | z | ----- | z | ----- | z | 93.10 | k | 92.12 | v | 81.04 | f | 81.79 | b | 77.83 | 69.84 | 68.33 | 57.58 | 71.08 | g | ||||
1905 | 57.10 | 56.64 | 58.40 | a | 61.43 | 63.42 | 75.07 | 86.87 | 89.10 | 90.17 | 81.03 | 67.83 | 64.77 | 70.99 | ||||||||||||
1906 | 63.71 | 64.04 | 64.23 | 73.07 | 76.52 | 90.20 | 99.77 | 95.74 | 93.97 | 90.23 | 72.93 | 66.77 | a | 79.26 | ||||||||||||
1907 | 62.03 | 75.68 | 69.53 | a | 75.60 | 79.77 | 87.20 | 98.94 | 97.29 | 94.47 | 78.71 | 75.53 | 71.00 | 80.48 | ||||||||||||
1908 | 68.55 | 67.10 | 76.77 | 82.67 | 80.19 | 90.59 | a | 100.29 | 96.97 | 91.80 | 84.03 | 75.03 | 66.74 | 81.73 | ||||||||||||
1909 | 65.68 | 65.29 | 66.47 | a | 79.53 | 78.74 | 91.43 | 96.42 | 97.87 | 91.03 | a | 87.19 | 78.57 | 60.48 | 79.89 | |||||||||||
1910 | 67.81 | 70.86 | 77.35 | 82.80 | 88.06 | 90.20 | 97.61 | 98.94 | 95.20 | 85.61 | 74.83 | 71.45 | 83.39 | |||||||||||||
1911 | 68.97 | 64.30 | a | 74.52 | 74.43 | 81.23 | 86.70 | 96.87 | 97.32 | 90.79 | a | 84.58 | 76.76 | a | 65.65 | 80.18 | ||||||||||
1912 | 74.23 | 77.00 | 64.48 | 69.77 | 79.68 | 89.63 | 92.65 | 92.42 | 90.33 | 74.81 | 77.83 | 68.97 | 79.32 | |||||||||||||
1913 | 69.23 | 66.64 | 73.13 | 79.87 | 80.61 | 85.30 | 93.26 | 96.97 | 94.17 | 86.23 | 69.40 | 62.74 | 79.79 | |||||||||||||
1914 | 64.68 | 69.32 | 75.55 | 75.10 | a | 77.74 | 88.67 | 95.90 | a | 94.81 | 89.40 | 80.87 | 78.13 | 58.32 | 79.04 | |||||||||||
1915 | 62.00 | 59.04 | 68.61 | 72.30 | 76.45 | 90.63 | 94.32 | 99.87 | 89.13 | 89.90 | 74.53 | 67.71 | 78.71 | |||||||||||||
1916 | 58.61 | 75.76 | 81.55 | 83.13 | 88.42 | 94.57 | 96.68 | 93.03 | 91.23 | 76.26 | 77.50 | 64.26 | 81.75 | |||||||||||||
1917 | 61.61 | 68.36 | 74.65 | 79.00 | 77.13 | 99.47 | 98.10 | 97.13 | 96.43 | 88.52 | 76.47 | 76.55 | 82.78 | |||||||||||||
1918 | 67.97 | 69.18 | 70.61 | 77.37 | 77.71 | 95.33 | 96.13 | 92.97 | 89.50 | 80.84 | 67.50 | 63.10 | 79.02 | |||||||||||||
1919 | 69.71 | 61.81 | a | 65.90 | 78.37 | 79.35 | 95.10 | 97.65 | 97.74 | 89.63 | 76.97 | 70.57 | 67.19 | 79.17 | ||||||||||||
1920 | 66.87 | 65.03 | 65.87 | 72.27 | 80.42 | 87.87 | 100.16 | 93.71 | 89.07 | 75.03 | 69.53 | 61.16 | 77.25 | |||||||||||||
1921 | 60.35 | 67.29 | 65.42 | 69.57 | 65.65 | 86.40 | 99.71 | 98.00 | 90.45 | a | 80.52 | 74.90 | 66.35 | 77.05 | ||||||||||||
1922 | 58.45 | 59.93 | 65.42 | 70.43 | 83.35 | 92.57 | 96.84 | 97.10 | 95.93 | 83.71 | 69.13 | 63.23 | 78.01 | |||||||||||||
1923 | 62.73 | a | 60.68 | 62.03 | 60.03 | 84.35 | 86.27 | 96.94 | 96.84 | 88.00 | 84.84 | 77.77 | 67.13 | 77.30 | ||||||||||||
1924 | 66.10 | a | 77.52 | 64.74 | 73.33 | 84.32 | 95.47 | 96.39 | 97.87 | 95.60 | 80.35 | 79.87 | 65.84 | 81.45 | ||||||||||||
1925 | 69.03 | 71.46 | 72.16 | 72.90 | 80.74 | 86.67 | 97.03 | 94.52 | 88.50 | 74.48 | 71.23 | 69.32 | 79.00 | |||||||||||||
1926 | 64.71 | 68.75 | 69.52 | 72.27 | 82.55 | 92.60 | 99.58 | 100.19 | 94.77 | 89.94 | 82.27 | 61.68 | 81.57 | |||||||||||||
1927 | 67.13 | 66.04 | 68.94 | 76.37 | 86.00 | 90.47 | 100.10 | 98.48 | 90.63 | 87.84 | 77.20 | 62.97 | 81.01 | |||||||||||||
1928 | 73.58 | 72.10 | 67.74 | 80.33 | 84.90 | 91.00 | 99.26 | 99.29 | 99.93 | 84.06 | 74.93 | 66.52 | 82.80 | |||||||||||||
1929 | 63.32 | 63.04 | 70.61 | 70.33 | 86.97 | 92.47 | 99.65 | 102.87 | 88.93 | 87.81 | 82.33 | 77.97 | 82.19 | |||||||||||||
1930 | 60.48 | 70.14 | 69.29 | 77.13 | 73.06 | 88.33 | 98.48 | 97.06 | 88.33 | 84.19 | 76.57 | 70.94 | 79.50 | |||||||||||||
1931 | 70.39 | 67.57 | 76.29 | 81.63 | 85.16 | 87.57 | 101.71 | 97.10 | 91.13 | 80.26 | 67.73 | 61.74 | 80.69 | |||||||||||||
1932 | 59.45 | 62.93 | 74.83 | a | 74.73 | 79.32 | 89.10 | 96.90 | 96.16 | 94.00 | 82.00 | 82.37 | 63.42 | 79.60 | ||||||||||||
1933 | 59.74 | 66.32 | 75.90 | 71.80 | 74.87 | 88.60 | 98.61 | 97.26 | 92.93 | 89.42 | 84.03 | 72.13 | 80.97 | |||||||||||||
1934 | 73.06 | 70.61 | 83.97 | 84.10 | 88.77 | 84.50 | 98.97 | 97.87 | 93.37 | 85.23 | 74.37 | 68.00 | 83.57 | |||||||||||||
1935 | 64.06 | 69.04 | 65.68 | 74.60 | 78.32 | 93.73 | 97.84 | 97.26 | 94.07 | 80.81 | 72.90 | 69.42 | 79.81 | |||||||||||||
1936 | 69.94 | 63.24 | 73.68 | 79.07 | 86.55 | 92.80 | 99.58 | 99.06 | 93.70 | 82.84 | 76.77 | 67.97 | 82.10 | |||||||||||||
1937 | 55.00 | 67.04 | 70.48 | 79.93 | 83.03 | 93.87 | 100.29 | 101.77 | 98.57 | 90.26 | 78.73 | 72.10 | 82.59 | |||||||||||||
1938 | 71.32 | 64.46 | 66.61 | 76.30 | 84.19 | 89.93 | 99.29 | 99.65 | 99.10 | 81.48 | 76.07 | 72.48 | 81.74 | |||||||||||||
1939 | 65.48 | 62.64 | 70.32 | 80.80 | 83.19 | 93.37 | 96.94 | 99.97 | 91.90 | 89.65 | 78.63 | 73.61 | 82.21 | |||||||||||||
1940 | 65.10 | 66.76 | 73.94 | 77.00 | 89.06 | 94.90 | 98.52 | 97.13 | 88.87 | 84.19 | 71.90 | 67.65 | 81.25 | |||||||||||||
1941 | 61.84 | 65.25 | 68.81 | 69.40 | 84.23 | 88.23 | 98.84 | 91.74 | 87.37 | 74.35 | 73.57 | 61.35 | 77.08 | |||||||||||||
1942 | 65.48 | 63.21 | 69.71 | 70.63 | 81.68 | 90.67 | 101.77 | 96.39 | 90.03 | 80.45 | 74.40 | 67.61 | 79.34 | |||||||||||||
1943 | 64.42 | 67.61 | 67.35 | 74.57 | 83.84 | 87.23 | 96.84 | 95.03 | 95.07 | 81.42 | 75.20 | 60.61 | 79.10 | |||||||||||||
1944 | 62.32 | 58.48 | 68.03 | 70.27 | 79.23 | 82.43 | 93.35 | 97.68 | 89.73 | 82.52 | 64.07 | 65.32 | 76.12 | |||||||||||||
1945 | 63.90 | 62.61 | 62.19 | 74.17 | 78.52 | 85.97 | 98.26 | 93.45 | 91.00 | 82.74 | 72.83 | 64.74 | 77.53 | |||||||||||||
1946 | 65.42 | 66.14 | 68.52 | 76.90 | 77.06 | 92.40 | 96.45 | ----- | z | 98.58 | d | 78.68 | 66.93 | 67.32 | 77.67 | a | ||||||||||
1947 | 66.90 | 72.39 | 71.10 | 77.70 | 84.74 | 87.83 | 102.42 | 95.97 | 97.73 | 82.58 | 70.27 | 65.10 | 81.23 | |||||||||||||
1948 | 73.42 | 64.41 | 65.74 | 75.72 | a | 81.94 | 86.90 | 97.06 | 96.88 | n | ----- | z | ----- | z | ----- | z | ----- | z | 77.89 | e | ||||||
1949 | 52.24 | n | 61.18 | 65.84 | 79.47 | 79.19 | 91.73 | 96.87 | 97.68 | 97.60 | 81.61 | 82.47 | 66.52 | 81.83 | a | |||||||||||
1950 | 60.23 | 71.71 | 72.68 | 78.77 | 80.19 | 89.43 | 97.03 | 99.65 | 89.83 | 89.55 | 79.00 | 73.18 | i | 82.55 | a | |||||||||||
1951 | 64.04 | c | 67.14 | 73.90 | 71.50 | 82.26 | 87.77 | 98.23 | 97.81 | 98.13 | 83.48 | 72.10 | 60.65 | 79.75 | ||||||||||||
1952 | 58.47 | a | 63.93 | 59.97 | 70.63 | 86.87 | 85.20 | 98.52 | 100.06 | 96.50 | 90.74 | 65.70 | 61.61 | 78.18 | ||||||||||||
1953 | 68.26 | 67.89 | 70.10 | 70.67 | 76.77 | 87.87 | 101.13 | 97.03 | 96.37 | 82.87 | 72.17 | 66.90 | 79.84 | |||||||||||||
1954 | 60.32 | 71.57 | 61.26 | 74.30 | 80.87 | 85.60 | 98.77 | a | 93.68 | 94.87 | 85.10 | 75.62 | d | 64.44 | f | 80.18 | a | |||||||||
1955 | 57.23 | 63.29 | 69.74 | 73.87 | 77.10 | 88.00 | 94.77 | 100.91 | i | 95.53 | 84.32 | 70.40 | 64.16 | 76.22 | a | |||||||||||
1956 | 65.19 | 60.52 | 74.16 | 71.10 | 80.48 | 93.34 | a | 97.68 | 95.32 | 99.47 | 78.61 | 78.70 | 71.29 | 80.49 | ||||||||||||
1957 | 57.35 | 67.33 | a | 67.77 | 73.07 | 75.00 | 93.60 | 100.61 | 97.65 | 92.93 | 73.94 | 66.67 | 67.52 | 77.79 | ||||||||||||
1958 | 65.77 | 65.36 | 61.87 | a | 73.70 | 86.00 | 90.87 | 97.16 | 99.55 | 95.90 | 88.42 | 73.50 | 75.29 | 81.12 | ||||||||||||
1959 | 69.39 | 62.32 | 77.68 | 81.60 | 79.35 | 94.73 | 102.48 | 96.81 | 88.60 | 86.74 | 77.43 | 67.42 | 82.05 | |||||||||||||
1960 | 60.55 | 63.72 | 74.74 | 80.73 | 85.42 | 97.10 | 103.13 | 99.74 | 97.08 | d | 83.61 | 70.33 | 68.35 | 82.04 | ||||||||||||
1961 | 72.19 | 72.46 | 70.74 | 81.47 | 80.77 | a | 96.57 | 99.74 | 99.39 | 91.17 | 85.58 | 71.17 | 67.10 | 82.36 | ||||||||||||
1962 | 68.32 | 60.82 | 64.48 | 84.70 | 80.55 | 91.73 | 99.97 | 104.16 | 98.23 | 87.16 | 77.90 | 74.03 | 82.67 | |||||||||||||
1963 | 65.48 | 76.43 | 69.52 | 71.57 | 81.77 | 86.90 | 100.48 | 99.45 | 96.57 | 84.65 | 73.20 | 73.42 | 81.62 | |||||||||||||
1964 | 66.55 | 70.10 | 68.55 | 73.27 | 82.39 | 91.47 | 103.23 | 99.77 | 95.20 | 91.65 | 70.03 | 65.13 | 81.44 | |||||||||||||
1965 | 68.90 | 71.82 | 67.29 | 73.93 | 81.45 | 84.13 | 100.29 | 101.58 | 89.57 | 92.52 | 70.90 | 63.65 | 80.50 | |||||||||||||
1966 | 64.90 | 64.50 | 74.55 | 80.93 | 83.77 | 93.73 | 101.32 | 101.77 | 95.73 | 86.45 | 72.70 | 66.45 | 82.24 | |||||||||||||
1967 | 67.84 | 72.43 | 67.90 | 63.90 | 82.61 | 87.55 | a | 102.32 | 104.39 | 92.57 | 91.32 | 77.70 | 61.94 | 81.04 | ||||||||||||
1968 | 66.35 | 71.90 | 72.90 | 77.07 | 84.58 | 92.90 | 99.68 | 101.60 | k | 95.63 | 85.94 | 75.93 | 64.77 | 80.70 | a | |||||||||||
1969 | 64.87 | 60.75 | 68.71 | 75.43 | 85.52 | 84.23 | 99.87 | 105.26 | 98.03 | 82.03 | 75.97 | 68.03 | 80.73 | |||||||||||||
1970 | 65.90 | 71.18 | 70.13 | 73.03 | 85.58 | 92.63 | 102.06 | 102.55 | 96.23 | 83.68 | 75.97 | 62.97 | 81.83 | |||||||||||||
1971 | 66.65 | 67.79 | 74.16 | 74.60 | 76.74 | 91.00 | 102.00 | 102.68 | 95.83 | 81.84 | 73.40 | 58.87 | 80.46 | |||||||||||||
1972 | 68.29 | 71.69 | 81.94 | 81.07 | 85.58 | 94.17 | 103.58 | 97.84 | 89.93 | 76.71 | 69.83 | 64.06 | 82.06 | |||||||||||||
1973 | 62.39 | 65.00 | 61.23 | 74.37 | 87.58 | 97.13 | 101.13 | 99.35 | 91.03 | 87.42 | 70.20 | 68.77 | 80.47 | |||||||||||||
1974 | 62.55 | 70.29 | 67.97 | 78.50 | 82.23 | 97.60 | 99.84 | 99.39 | 98.03 | 80.52 | 75.63 | 65.35 | 81.49 | |||||||||||||
1975 | 69.94 | 65.86 | 66.48 | 65.30 | 83.68 | 88.77 | 98.29 | 98.68 | 96.30 | 82.65 | 77.13 | 69.71 | 80.23 | |||||||||||||
1976 | 74.35 | 67.17 | 69.71 | 71.43 | 84.32 | 93.77 | 96.55 | 95.42 | 82.53 | 83.00 | 78.30 | c | 71.65 | 80.68 | ||||||||||||
1977 | 65.63 | a | 75.18 | 66.23 | 79.70 | 74.06 | 93.13 | 101.58 | 96.87 | 90.87 | 87.94 | 79.40 | 70.76 | b | 81.78 | |||||||||||
1978 | 64.03 | a | 65.64 | 69.52 | 70.67 | 86.10 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.19 | g | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 65.10 | 66.90 | 69.53 | 75.06 | 81.36 | 90.41 | 98.38 | 97.39 | 92.59 | 83.18 | 74.14 | 66.55 | 80.25 | |||||||||||||
S.D. | 4.44 | 4.56 | 4.95 | 4.98 | 4.47 | 4.04 | 2.79 | 3.48 | 4.29 | 4.79 | 4.41 | 4.22 | 2.01 | |||||||||||||
SKEW | -0.00 | 0.20 | 0.40 | -0.40 | -1.21 | -0.55 | -0.93 | -1.04 | -0.50 | -0.37 | 0.03 | 0.31 | -1.51 | |||||||||||||
MAX | 74.35 | 77.52 | 83.97 | 84.70 | 89.06 | 99.47 | 103.58 | 105.26 | 101.17 | 92.52 | 84.03 | 77.97 | 83.57 | |||||||||||||
MIN | 55.00 | 56.64 | 58.40 | 60.03 | 63.42 | 75.07 | 86.87 | 81.79 | 77.83 | 69.84 | 64.07 | 57.58 | 70.99 | |||||||||||||
YRS | 84 | 84 | 85 | 82 | 83 | 81 | 82 | 79 | 84 | 83 | 84 | 81 | 71 |