YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | 65.13 | 63.89 | 60.29 | 65.67 | 69.13 | 80.70 | 90.68 | 86.74 | 84.83 | 85.19 | 68.47 | 61.74 | 73.54 | |||||||||||||
1907 | 55.55 | 68.96 | 63.23 | 68.03 | 71.87 | 78.50 | 89.61 | 87.26 | 84.93 | 72.87 | 69.57 | 66.68 | 73.09 | |||||||||||||
1908 | 62.03 | 59.76 | 68.74 | 72.53 | 69.26 | 79.67 | 90.71 | 87.55 | 82.53 | 73.87 | 72.10 | 65.10 | 73.65 | |||||||||||||
1909 | 62.00 | a | 60.75 | 59.58 | 70.33 | 71.10 | 82.63 | 86.89 | c | 87.00 | 83.00 | 79.26 | 72.13 | 57.61 | 72.69 | |||||||||||
1910 | 62.00 | a | 62.39 | e | 70.94 | 73.77 | 80.55 | 82.07 | 88.26 | 89.90 | 86.97 | 76.81 | 70.13 | 68.97 | 76.06 | |||||||||||
1911 | 63.13 | 55.07 | 65.29 | 66.47 | 71.61 | 81.20 | 88.39 | 89.71 | 83.23 | 78.48 | 70.50 | 63.74 | 73.07 | |||||||||||||
1912 | 67.52 | 71.79 | 55.29 | 62.13 | 72.39 | 82.27 | 84.58 | 85.03 | 82.23 | 70.03 | 72.87 | 66.23 | 72.70 | |||||||||||||
1913 | 58.84 | 58.11 | 64.35 | 69.50 | 74.26 | 78.40 | 86.13 | 87.26 | 86.90 | 78.87 | 66.73 | 60.06 | 72.45 | |||||||||||||
1914 | 60.10 | 63.39 | 69.48 | 69.70 | 75.07 | a | 83.41 | a | 92.84 | 92.48 | 86.97 | 76.39 | 73.73 | 52.35 | 74.66 | |||||||||||
1915 | 55.47 | a | 56.74 | a | 65.45 | 65.23 | 69.32 | 85.93 | 89.23 | 94.71 | 86.40 | 86.77 | 72.04 | b | 63.45 | 74.23 | ||||||||||
1916 | 52.76 | b | 68.14 | 72.35 | 74.70 | 76.33 | a | 86.82 | b | 92.74 | 91.65 | 90.37 | 73.77 | 71.70 | 58.94 | 75.86 | ||||||||||
1917 | 54.94 | 61.57 | 64.39 | 67.90 | 66.68 | 90.40 | 93.97 | 93.45 | 91.27 | 86.71 | 75.57 | 74.97 | 76.82 | |||||||||||||
1918 | 64.97 | 63.79 | 66.26 | 72.20 | 71.84 | 91.80 | 93.26 | 91.77 | 90.10 | 81.39 | 66.20 | 60.55 | 76.18 | |||||||||||||
1919 | 65.61 | 57.07 | 62.29 | 74.40 | 78.74 | 91.60 | 94.03 | 95.45 | 88.43 | 75.21 | b | 68.43 | 65.35 | 76.39 | ||||||||||||
1920 | 63.90 | 63.00 | 62.16 | 69.10 | 79.48 | 86.30 | 96.77 | 92.97 | 86.70 | 75.06 | 69.80 | 61.77 | 75.59 | |||||||||||||
1921 | 60.19 | 68.68 | 67.06 | 73.03 | 70.65 | 83.07 | 93.74 | 92.81 | 88.30 | 82.71 | 80.50 | b | 67.35 | 77.34 | ||||||||||||
1922 | 60.58 | 59.64 | 65.42 | 70.67 | 80.26 | 90.41 | a | 95.16 | 93.68 | 95.87 | 84.39 | 71.87 | 66.97 | 77.91 | ||||||||||||
1923 | 66.06 | 62.82 | 67.74 | 65.27 | 79.61 | 80.17 | 91.16 | 91.26 | 83.57 | 78.32 | 71.40 | 60.39 | 74.81 | |||||||||||||
1924 | 64.84 | 74.52 | 60.68 | 66.70 | 81.74 | 90.33 | 93.74 | 94.58 | 92.33 | 81.52 | 74.27 | 64.26 | 78.29 | |||||||||||||
1925 | 66.68 | 69.14 | 73.32 | 70.20 | 84.25 | s | 84.70 | 94.29 | 91.68 | 86.20 | 73.55 | 63.07 | 63.13 | 76.00 | a | |||||||||||
1926 | 63.87 | 66.86 | 68.90 | 69.60 | 78.71 | 92.63 | 97.70 | a | 96.20 | f | 91.53 | 84.55 | 75.93 | 54.74 | 76.82 | a | ||||||||||
1927 | 64.48 | 62.18 | 63.68 | 69.07 | 77.48 | 84.97 | 93.61 | 92.52 | 84.57 | 83.06 | 74.10 | 58.94 | 75.72 | |||||||||||||
1928 | 67.10 | 63.66 | 68.19 | 73.93 | 81.87 | 86.80 | 93.94 | 92.45 | 92.27 | 79.84 | 72.67 | 65.13 | 78.15 | |||||||||||||
1929 | 59.77 | 57.32 | 60.81 | 62.87 | 70.39 | 82.37 | 90.16 | 90.45 | 82.37 | 78.87 | 73.20 | 71.29 | 73.32 | |||||||||||||
1930 | 52.97 | 62.64 | 63.71 | 67.00 | 63.81 | 82.47 | 90.58 | 90.13 | 82.17 | 78.13 | 67.60 | 62.65 | 71.99 | |||||||||||||
1931 | 61.35 | 58.64 | 71.06 | 72.63 | 81.26 | 83.63 | 96.16 | 91.32 | 85.10 | 77.00 | 60.80 | 55.39 | 74.53 | |||||||||||||
1932 | 53.35 | 54.41 | 66.87 | 67.47 | 75.58 | 82.37 | 91.06 | 91.52 | 91.07 | 77.42 | 73.90 | 55.71 | 73.39 | |||||||||||||
1933 | 52.32 | 56.46 | 67.71 | 65.77 | 67.74 | 84.57 | 93.52 | 90.13 | 86.63 | 83.23 | 76.50 | 65.97 | 74.21 | |||||||||||||
1934 | 65.16 | 63.89 | 75.87 | 77.50 | 81.23 | 77.77 | 91.90 | 91.48 | 86.40 | 78.94 | 69.60 | 61.84 | 76.80 | |||||||||||||
1935 | 58.32 | 61.71 | 60.39 | 66.90 | 72.00 | 88.37 | 92.29 | 92.32 | 90.73 | 79.13 | 66.97 | 63.68 | 74.40 | |||||||||||||
1936 | 63.26 | 58.48 | 68.00 | 73.80 | 79.39 | 85.90 | 92.94 | 93.58 | 89.43 | 74.68 | 64.13 | 53.23 | 74.73 | |||||||||||||
1937 | 42.97 | 56.71 | 59.65 | 64.93 | 72.71 | 83.60 | 92.45 | 94.10 | 91.03 | 82.26 | 70.40 | 62.55 | 72.78 | |||||||||||||
1938 | 62.52 | 54.93 | 57.45 | 68.03 | 74.13 | 83.30 | 92.48 | 91.84 | 92.17 | 75.26 | 68.00 | 64.39 | 73.71 | |||||||||||||
1939 | 58.16 | 53.64 | 65.61 | 74.53 | 78.13 | 85.93 | 92.90 | 95.23 | 81.37 | 77.29 | 72.60 | 70.35 | 75.48 | |||||||||||||
1940 | 57.19 | ----- | z | ----- | z | 69.57 | 82.19 | 89.67 | 92.77 | 95.68 | 86.53 | 78.52 | 67.47 | 63.77 | 78.34 | b | ||||||||||
1941 | 57.10 | 60.32 | 63.13 | 62.93 | 77.42 | 81.30 | 93.19 | 87.65 | 82.67 | 70.10 | 69.33 | 58.19 | 71.94 | |||||||||||||
1942 | 61.35 | 58.46 | 64.13 | 65.07 | 72.68 | 86.47 | 94.84 | 93.40 | a | 88.43 | 79.90 | 73.93 | 65.58 | 75.35 | ||||||||||||
1943 | 60.45 | 62.93 | 64.23 | 70.00 | 79.16 | 81.13 | 92.35 | 91.58 | 92.67 | 82.23 | 73.00 | 56.74 | 75.54 | |||||||||||||
1944 | 58.19 | 54.03 | 63.19 | 66.72 | a | 74.84 | 77.46 | b | 89.81 | 94.94 | 91.37 | 81.97 | a | ----- | z | 61.87 | 74.04 | a | ||||||||
1945 | 59.71 | 59.25 | 57.26 | 69.97 | 73.90 | 82.83 | a | 95.55 | 88.65 | 86.23 | 77.03 | 67.37 | 60.10 | 73.15 | ||||||||||||
1946 | 60.10 | 60.52 | a | 63.03 | 72.90 | 74.42 | 87.67 | 91.81 | 92.55 | 90.13 | 72.77 | 62.10 | 63.48 | 74.29 | ||||||||||||
1947 | 59.87 | 66.88 | d | 64.81 | 71.07 | 81.06 | 83.30 | 95.16 | 90.32 | 92.03 | 77.17 | a | 64.39 | b | 58.53 | a | 75.38 | |||||||||
1948 | 67.52 | 58.62 | 58.40 | a | 70.19 | d | 76.27 | e | 82.67 | 92.39 | 92.39 | 89.33 | 76.06 | 65.83 | 58.26 | 73.99 | ||||||||||
1949 | 43.90 | 54.89 | 60.45 | 71.73 | 72.65 | 87.20 | 91.31 | o | 91.03 | 92.00 | 75.16 | 76.07 | 59.13 | 71.29 | a | |||||||||||
1950 | 54.77 | 66.32 | 66.03 | 73.03 | 75.71 | 85.80 | 91.68 | 95.10 | 85.03 | 84.23 | 74.33 | 70.23 | 76.86 | |||||||||||||
1951 | 59.55 | 61.18 | 64.97 | 67.13 | 77.77 | 84.20 | 94.55 | 92.35 | 93.67 | 78.89 | c | 65.63 | 56.87 | 74.73 | ||||||||||||
1952 | 54.61 | 60.50 | a | 54.87 | 67.90 | a | 82.97 | a | 84.97 | 93.90 | a | 96.29 | 92.13 | 87.16 | 62.47 | 57.90 | 74.64 | |||||||||
1953 | 66.26 | 63.82 | 64.29 | 66.47 | 70.26 | 84.37 | 96.77 | i | 93.13 | 92.27 | 78.71 | 71.23 | 64.00 | 74.07 | a | |||||||||||
1954 | 61.13 | 69.36 | 60.58 | 74.93 | 82.90 | b | 86.26 | c | 94.59 | b | 90.85 | d | 90.10 | a | 82.11 | c | 74.22 | g | 62.96 | c | 77.80 | a | ||||
1955 | 53.90 | 59.81 | a | 67.00 | a | 70.18 | b | 74.17 | g | 83.39 | g | 91.70 | a | 96.35 | 90.48 | a | 81.94 | 71.67 | 61.16 | 74.42 | b | |||||
1956 | 62.90 | 57.86 | 70.42 | 66.63 | 76.32 | 90.10 | 92.58 | 91.42 | 94.47 | 75.39 | 72.30 | 65.10 | 76.29 | |||||||||||||
1957 | 53.19 | 67.21 | 64.94 | 69.18 | b | 72.00 | a | 89.63 | 96.23 | 92.42 | 87.88 | e | 70.26 | 61.97 | 64.19 | 74.09 | ||||||||||
1958 | 61.94 | 62.25 | 56.03 | 68.73 | 80.94 | 85.17 | 91.65 | 95.47 | a | 90.77 | 82.87 | 69.63 | 72.23 | 76.47 | ||||||||||||
1959 | 65.74 | 58.18 | 72.65 | 76.87 | 75.10 | 90.23 | 97.65 | 92.16 | 85.30 | 78.60 | a | 70.76 | a | 62.52 | 77.15 | |||||||||||
1960 | 54.81 | 57.79 | 70.10 | b | 74.17 | a | 78.63 | a | ----- | z | 95.94 | 94.06 | 90.63 | 78.39 | 67.24 | a | 63.63 | a | 75.04 | a | ||||||
1961 | 65.52 | 67.08 | b | 65.39 | 75.41 | a | 74.65 | 89.85 | d | 96.26 | 93.70 | a | 85.30 | 77.13 | 64.52 | a | 59.10 | a | 76.16 | |||||||
1962 | 60.61 | 56.71 | 58.52 | 77.30 | 73.68 | 85.93 | 92.32 | 96.58 | 90.67 | 80.00 | 72.55 | a | 66.67 | a | 75.96 | |||||||||||
1963 | 59.06 | 70.79 | 63.84 | 64.87 | 76.81 | 79.63 | 93.90 | 91.00 | 89.73 | 79.03 | 65.67 | 65.13 | 74.95 | |||||||||||||
1964 | 58.48 | 61.93 | 61.68 | 65.67 | 73.48 | 83.70 | 94.87 | a | 92.35 | 88.20 | 83.87 | 61.79 | a | 59.29 | 73.78 | |||||||||||
1965 | 61.48 | 63.86 | 60.03 | 66.53 | 73.81 | 78.00 | ----- | z | 93.68 | 81.77 | 85.50 | a | ----- | z | 57.68 | 72.23 | b | |||||||||
1966 | 58.23 | 57.18 | 68.37 | a | 73.80 | 78.62 | b | 86.28 | a | 92.65 | 93.97 | a | 88.50 | 79.06 | 67.37 | 60.19 | 75.35 | |||||||||
1967 | 61.42 | 66.86 | 63.97 | 58.10 | 76.90 | a | 80.30 | c | 94.47 | a | 95.84 | 84.17 | 83.77 | 71.90 | a | 60.19 | 74.82 | |||||||||
1968 | 61.13 | 67.34 | 65.94 | 71.10 | 77.60 | a | 85.77 | 91.94 | ----- | z | 88.40 | 78.35 | 68.77 | 58.97 | 74.12 | a | ||||||||||
1969 | 61.42 | 54.39 | 63.32 | 69.27 | 78.90 | 79.59 | a | 92.06 | 96.74 | 91.13 | 74.77 | 66.83 | 63.61 | 74.34 | ||||||||||||
1970 | 60.04 | d | 65.18 | 63.55 | 66.40 | 79.97 | 87.73 | 96.10 | 94.65 | 87.77 | 77.13 | 68.53 | 57.35 | 75.37 | ||||||||||||
1971 | 63.00 | 62.32 | 68.19 | 67.67 | 70.42 | 83.63 | 94.71 | 93.16 | 88.67 | 73.52 | 65.83 | 52.33 | a | 73.62 | ||||||||||||
1972 | 62.53 | a | 67.52 | b | 77.16 | 74.45 | a | 78.81 | 87.13 | 96.45 | 91.81 | 84.80 | 72.65 | 64.33 | ----- | z | 77.97 | a | ||||||||
1973 | ----- | z | 59.68 | 55.87 | 70.78 | c | 85.52 | 91.43 | 96.00 | a | 94.17 | b | 89.00 | 81.43 | a | 64.53 | 63.45 | 77.44 | a | |||||||
1974 | ----- | z | 64.61 | 65.00 | 71.70 | 77.43 | a | 92.25 | b | ----- | z | 91.60 | a | 90.47 | 76.06 | 68.83 | 59.58 | 75.75 | b | |||||||
1975 | 62.71 | 59.89 | 60.48 | 59.67 | 77.19 | 85.43 | 93.71 | 93.27 | a | 88.13 | 78.42 | 70.27 | 64.81 | 74.50 | ||||||||||||
1976 | ----- | z | ----- | z | 70.75 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | 68.89 | 59.82 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.36 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 60.11 | 61.93 | 64.48 | 69.42 | 75.81 | 84.88 | 92.90 | 92.27 | 88.13 | 78.73 | 69.49 | 62.18 | 74.88 | |||||||||||||
S.D. | 4.94 | 4.80 | 4.73 | 4.05 | 4.43 | 3.89 | 2.63 | 2.57 | 3.46 | 4.10 | 4.13 | 4.59 | 1.55 | |||||||||||||
SKEW | -1.13 | 0.33 | 0.25 | -0.24 | -0.26 | 0.11 | -0.76 | -0.60 | -0.16 | 0.02 | -0.04 | 0.20 | 0.21 | |||||||||||||
MAX | 67.52 | 74.52 | 77.16 | 77.50 | 85.52 | 92.63 | 97.70 | 96.74 | 95.87 | 87.16 | 80.50 | 74.97 | 78.29 | |||||||||||||
MIN | 42.97 | 53.64 | 54.87 | 58.10 | 63.81 | 77.46 | 84.58 | 85.03 | 81.37 | 70.03 | 60.80 | 52.33 | 71.94 | |||||||||||||
YRS | 68 | 70 | 70 | 70 | 68 | 68 | 66 | 68 | 70 | 70 | 67 | 69 | 56 |