YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.00 | k | 60.97 | 60.97 | k | |
1910 | 60.58 | 61.11 | 63.90 | 67.41 | a | 67.19 | 67.20 | 71.32 | 71.23 | 72.10 | 71.84 | 65.03 | 64.97 | 66.99 | ||||||||||||
1911 | 62.94 | 60.29 | 63.58 | 63.57 | 65.48 | 65.80 | 69.16 | 71.06 | 70.83 | 70.61 | 70.90 | a | 62.94 | 66.43 | ||||||||||||
1912 | 64.16 | 65.28 | 61.03 | 61.97 | 65.39 | 66.97 | 69.06 | 70.87 | 70.72 | a | 71.06 | 68.33 | 62.84 | 66.47 | ||||||||||||
1913 | 58.19 | 58.57 | 62.87 | 62.80 | 65.26 | 66.73 | 70.68 | 72.35 | 76.54 | b | 72.26 | 68.07 | 61.61 | 66.33 | ||||||||||||
1914 | 61.68 | 62.96 | 69.61 | 67.77 | 63.84 | 66.70 | 67.84 | 70.06 | 71.00 | 72.61 | 71.87 | 61.55 | 67.29 | |||||||||||||
1915 | 61.61 | 61.21 | 67.90 | 64.73 | 65.14 | b | 67.87 | 70.48 | 70.90 | 68.90 | a | 64.61 | ----- | z | ----- | z | 66.34 | b | ||||||||
1916 | 61.00 | v | 65.62 | 68.71 | 70.50 | 66.97 | a | 65.63 | 68.77 | 68.79 | b | 66.23 | 66.13 | 64.33 | 59.32 | 66.46 | a | |||||||||
1917 | 59.45 | 62.32 | 64.35 | e | 62.63 | 63.74 | 69.86 | a | 72.84 | 71.19 | 72.87 | 71.58 | 68.33 | 62.55 | 66.81 | |||||||||||
1918 | 59.23 | 59.89 | 61.87 | 63.30 | 63.00 | 67.63 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.49 | f | ||||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.35 | 78.55 | 77.33 | 76.32 | 71.92 | q | 70.73 | a | 76.46 | g | ||||
1920 | 68.17 | a | 65.04 | a | 66.23 | a | 67.13 | 68.52 | 70.70 | 74.61 | 77.39 | 75.43 | 71.32 | 67.77 | 63.42 | 69.64 | ||||||||||
1921 | 63.00 | a | 63.82 | 67.16 | 67.59 | a | 65.65 | 69.30 | 74.13 | 73.84 | 73.14 | a | 71.00 | 69.27 | 66.13 | 68.67 | ||||||||||
1922 | 60.61 | 60.68 | 62.84 | 65.40 | 67.20 | a | 69.93 | 71.87 | 74.93 | a | 74.97 | 71.90 | a | 69.33 | 65.55 | 67.93 | ||||||||||
1923 | 65.16 | 63.78 | a | 70.03 | a | 66.07 | 69.67 | a | 69.03 | 71.81 | 72.45 | 74.23 | 73.73 | a | 72.83 | 64.19 | 69.42 | |||||||||
1924 | 63.71 | 65.39 | a | 63.00 | 63.62 | a | 65.52 | 68.10 | 69.97 | 78.88 | e | 73.03 | 68.87 | 68.40 | 63.29 | 67.65 | ||||||||||
1925 | 62.16 | 62.75 | 64.84 | 65.70 | 68.29 | 70.90 | 75.45 | 73.35 | 72.37 | 70.03 | 69.10 | 65.87 | 68.40 | |||||||||||||
1926 | 63.94 | 65.21 | 68.42 | 66.47 | 67.39 | 69.20 | 70.48 | 72.97 | 70.07 | 68.35 | 66.90 | 58.13 | 67.29 | |||||||||||||
1927 | 59.16 | 59.86 | 61.60 | a | 61.43 | 64.45 | 66.10 | 70.65 | 69.77 | 68.97 | 67.61 | 64.93 | 59.00 | 64.46 | ||||||||||||
1928 | 61.06 | 62.32 | a | 63.10 | 64.33 | 65.16 | 66.57 | 67.67 | a | 67.97 | 67.40 | 62.42 | 62.31 | a | 58.23 | 64.04 | ||||||||||
1929 | 55.77 | 57.25 | 58.29 | 59.33 | 65.03 | 68.23 | d | 70.42 | e | 72.44 | d | 70.56 | l | 69.23 | i | 64.40 | j | 63.29 | j | 63.35 | d | |||||
1930 | 58.77 | i | 60.17 | j | 63.21 | b | 65.65 | g | 63.58 | g | 67.30 | 70.83 | h | 71.30 | a | 68.93 | 70.22 | h | 63.93 | a | 61.55 | k | 66.93 | g | ||
1931 | 62.85 | k | 62.82 | 67.68 | 70.46 | b | 71.83 | a | 75.55 | a | 79.26 | 79.45 | 75.67 | 76.40 | a | 64.89 | c | 62.58 | 71.51 | a | ||||||
1932 | 62.58 | 63.41 | 67.67 | a | 66.80 | 69.58 | 69.47 | 70.90 | 70.10 | 70.40 | 71.10 | a | 72.80 | 63.06 | 68.16 | |||||||||||
1933 | 61.71 | 62.71 | 66.40 | a | 65.10 | a | 65.29 | 67.30 | 70.00 | 71.06 | 67.50 | 67.71 | 70.60 | 62.90 | 66.52 | |||||||||||
1934 | 65.87 | 64.93 | 68.87 | 69.23 | 73.55 | 72.63 | 77.23 | 76.39 | 77.40 | 74.87 | 70.17 | 69.10 | 71.69 | |||||||||||||
1935 | 65.97 | 72.00 | 66.13 | 70.60 | 71.48 | 74.73 | 74.87 | 79.84 | 77.69 | a | 74.87 | 68.90 | 62.83 | a | 71.66 | |||||||||||
1936 | 62.30 | a | 61.62 | 63.13 | 61.80 | 69.97 | a | 70.70 | 75.48 | 74.74 | 71.73 | 70.10 | 71.20 | 64.45 | 68.10 | |||||||||||
1937 | 55.68 | 58.79 | 62.71 | 65.38 | a | 66.94 | 68.97 | 71.65 | 72.40 | k | 72.57 | 68.52 | 65.07 | 65.29 | 65.59 | a | ||||||||||
1938 | 65.39 | 62.64 | 63.23 | 64.90 | 66.35 | 66.43 | 69.03 | 73.84 | 74.67 | 70.55 | 66.83 | a | 65.61 | 67.46 | ||||||||||||
1939 | 62.06 | 59.68 | 59.39 | 64.33 | 67.03 | 69.83 | 72.29 | 72.65 | 76.97 | a | 77.16 | 68.73 | 66.38 | e | 68.04 | |||||||||||
1940 | 63.58 | 64.00 | 65.26 | 67.00 | 68.03 | a | 67.63 | 70.94 | 71.61 | 72.97 | 72.23 | 67.90 | 65.77 | 68.08 | ||||||||||||
1941 | 63.55 | 64.89 | 66.74 | 65.60 | 72.50 | a | 69.28 | a | 70.52 | 72.81 | 71.67 | 71.23 | 69.55 | a | 63.39 | 68.48 | ||||||||||
1942 | 64.27 | a | 63.07 | 63.74 | 65.43 | 67.93 | a | 67.00 | 70.48 | 70.90 | 70.27 | 72.27 | a | 67.43 | 63.71 | 67.21 | ||||||||||
1943 | 63.73 | a | 65.64 | 64.65 | 65.61 | g | 74.64 | t | 70.70 | c | 76.87 | 76.97 | 76.27 | 73.87 | 72.43 | 67.00 | 70.81 | b | ||||||||
1944 | 63.81 | e | 61.76 | 66.13 | a | 63.33 | 65.06 | 67.30 | 67.90 | 70.32 | 69.57 | 70.13 | 64.57 | 64.67 | a | 66.21 | ||||||||||
1945 | 62.06 | 62.39 | 63.03 | 64.17 | 66.59 | b | 67.17 | a | 70.44 | d | 73.67 | g | 72.88 | m | ----- | z | 67.00 | b | 61.87 | a | 64.97 | c | ||||
1946 | 62.97 | a | 62.04 | b | 62.00 | a | 64.54 | b | 65.77 | a | 68.93 | 70.80 | a | 72.59 | b | 74.43 | 73.00 | 65.30 | 61.23 | 66.97 | ||||||
1947 | 61.10 | 62.04 | a | 64.97 | a | 67.80 | 68.74 | 72.60 | 72.71 | 73.83 | b | 72.73 | 73.45 | 65.18 | b | 63.68 | 68.24 | |||||||||
1948 | 63.10 | a | 61.07 | 61.35 | 65.57 | 66.53 | a | 67.97 | a | 68.71 | 68.94 | 71.20 | 69.26 | 68.11 | b | 60.94 | 66.06 | |||||||||
1949 | 55.10 | 57.25 | 61.27 | a | 64.23 | 67.93 | a | 71.00 | a | 69.52 | b | 71.90 | 71.67 | 68.48 | 68.87 | 61.10 | 65.69 | |||||||||
1950 | 57.23 | 57.71 | 61.32 | 63.47 | 63.60 | a | 66.21 | a | 70.48 | 69.13 | 69.57 | 69.26 | 67.07 | 64.00 | 64.92 | |||||||||||
1951 | 60.58 | 58.54 | 61.55 | 62.07 | a | 62.87 | a | 66.00 | 69.71 | 69.55 | 69.63 | 71.39 | 66.46 | d | 59.77 | 64.84 | ||||||||||
1952 | 58.26 | 62.54 | a | 58.97 | 62.07 | 65.26 | 66.20 | 67.90 | 69.07 | b | 72.55 | a | 66.23 | 64.10 | 61.13 | 64.52 | ||||||||||
1953 | 64.87 | a | 66.29 | 62.19 | 61.03 | 68.35 | 66.33 | 71.93 | a | 69.82 | c | 68.97 | 70.71 | 67.13 | 65.47 | a | 66.92 | |||||||||
1954 | 60.26 | 66.46 | 61.68 | 60.93 | a | 63.84 | 67.83 | 73.42 | 72.42 | 70.40 | 67.57 | a | 66.86 | a | 62.70 | a | 66.20 | |||||||||
1955 | 58.94 | 60.79 | 63.90 | 66.30 | 63.83 | a | 65.52 | e | 67.81 | 71.94 | 73.57 | 64.39 | 64.17 | a | 58.20 | a | 64.95 | |||||||||
1956 | 59.77 | 57.69 | 61.87 | 59.93 | 66.61 | 67.63 | 70.03 | 70.84 | 72.20 | 68.06 | 70.17 | 65.00 | 65.82 | |||||||||||||
1957 | 53.70 | a | 58.07 | a | 59.94 | 59.90 | 62.10 | 65.39 | b | 68.94 | 74.29 | 72.30 | 69.61 | 66.97 | 67.94 | 64.93 | ||||||||||
1958 | 65.74 | 63.50 | 63.42 | 68.63 | 68.23 | 72.23 | 71.45 | 74.13 | 75.67 | 75.39 | 66.93 | 67.03 | 69.36 | |||||||||||||
1959 | 63.55 | 62.07 | 67.47 | a | 66.40 | 68.71 | 70.70 | 75.97 | 76.45 | 75.23 | 71.48 | 71.17 | 65.84 | 69.59 | ||||||||||||
1960 | 59.65 | 62.18 | a | 63.03 | 67.17 | 69.06 | 69.10 | 72.60 | a | 73.16 | 73.73 | 71.10 | 64.87 | 63.47 | a | 67.43 | ||||||||||
1961 | 66.39 | 66.68 | 64.29 | 65.27 | 66.32 | 67.90 | 73.77 | 73.90 | 72.30 | 69.94 | 65.10 | 59.55 | 67.62 | |||||||||||||
1962 | 63.68 | 59.23 | b | 59.71 | ----- | z | 64.93 | d | 65.93 | 67.72 | b | 70.81 | 69.00 | 66.39 | 64.50 | 61.58 | 64.86 | a | ||||||||
1963 | 61.35 | 64.18 | 64.35 | 62.10 | 66.77 | 67.57 | 70.10 | 73.68 | 78.04 | c | 73.90 | 65.50 | 65.32 | 67.74 | ||||||||||||
1964 | 63.90 | a | 65.00 | a | 63.19 | 63.97 | 63.39 | 65.00 | 71.45 | 74.84 | 73.30 | 71.17 | b | 64.13 | 62.10 | a | 66.79 | |||||||||
1965 | 61.52 | 61.21 | 62.68 | 63.17 | a | 64.29 | 64.60 | 67.53 | a | ----- | z | 71.27 | 73.90 | ----- | z | 60.48 | 65.07 | b | ||||||||
1966 | 60.30 | a | 60.79 | 61.71 | 68.10 | ----- | z | 68.10 | 69.94 | 72.63 | a | 72.43 | 72.97 | 66.27 | 64.19 | 67.04 | a | |||||||||
1967 | 62.42 | 64.38 | b | 62.39 | 60.83 | 67.35 | 68.20 | 73.81 | 77.00 | 75.97 | 74.26 | 71.17 | a | 62.28 | b | 68.34 | ||||||||||
1968 | ----- | z | 64.45 | ----- | z | 67.79 | b | 68.63 | a | 69.83 | 72.94 | 74.10 | 73.60 | 69.19 | 67.93 | 60.65 | 68.91 | b | ||||||||
1969 | 60.97 | 55.89 | 60.61 | 65.30 | 65.19 | 68.13 | ----- | z | 73.10 | 67.77 | 68.58 | ----- | z | 61.84 | 64.74 | b | ||||||||||
1970 | 62.19 | 64.04 | 63.39 | 64.53 | 66.32 | 68.47 | 71.39 | 73.45 | 73.87 | 69.74 | 65.80 | 61.61 | 67.07 | |||||||||||||
1971 | 60.74 | 62.21 | 61.06 | 62.47 | 62.50 | a | 65.53 | 71.48 | 77.55 | 74.87 | 71.39 | 64.90 | 60.55 | 66.27 | ||||||||||||
1972 | 59.61 | 60.61 | a | 64.77 | 67.13 | 68.00 | 71.23 | 75.32 | 74.94 | 72.97 | 71.84 | 65.43 | 63.26 | 67.93 | ||||||||||||
1973 | 61.84 | 63.64 | 61.94 | 66.23 | 65.03 | 69.24 | a | ----- | z | 73.55 | 71.27 | 70.52 | 64.07 | 63.61 | 66.45 | a | ||||||||||
1974 | 59.90 | 63.89 | 61.32 | 66.63 | 66.65 | 70.43 | 73.03 | 71.68 | 71.43 | 69.90 | 67.57 | 63.23 | 67.14 | |||||||||||||
1975 | 62.35 | 60.71 | 60.19 | j | 63.88 | v | 65.61 | 66.93 | 71.58 | 72.03 | 72.60 | 70.16 | 67.76 | a | 62.74 | 67.25 | b | |||||||||
1976 | 67.23 | 64.28 | 66.61 | 68.00 | 71.73 | a | 79.00 | 77.74 | 77.23 | 76.10 | 76.57 | a | 73.33 | 68.71 | 72.21 | |||||||||||
1977 | 65.65 | 68.19 | a | 64.87 | a | 70.03 | 71.52 | b | 73.82 | b | 78.41 | b | 79.61 | 77.63 | 73.81 | 70.24 | a | 66.13 | 71.66 | |||||||
1978 | 64.42 | 65.44 | a | 69.23 | 69.20 | 76.16 | 78.33 | 77.16 | 79.19 | 80.67 | 73.84 | 66.87 | 62.26 | 71.90 | ||||||||||||
1979 | 62.90 | 63.43 | 66.94 | 72.63 | 72.74 | 77.86 | b | 77.45 | 79.71 | 81.86 | b | 75.03 | b | 70.10 | 68.32 | 72.41 | ||||||||||
1980 | 67.29 | 70.52 | 71.06 | 73.97 | 71.94 | 76.73 | 79.70 | a | 80.39 | c | ----- | z | ----- | z | ----- | z | 66.61 | 73.13 | c | |||||||
1981 | 67.26 | 68.71 | 66.16 | 67.00 | 71.58 | 75.03 | a | 76.81 | 76.29 | 75.37 | 73.03 | 70.03 | 66.55 | 71.15 | ||||||||||||
1982 | 64.03 | 65.82 | 65.23 | 67.53 | 68.52 | 68.55 | a | 72.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.46 | e | ||||||
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | 59.90 | 63.13 | 63.35 | 67.13 | 73.45 | 72.68 | 72.17 | 72.45 | 62.00 | a | 62.32 | 66.86 | b | |||||||||
1986 | 64.23 | a | 62.43 | 62.39 | 66.33 | 66.40 | a | 67.80 | 70.19 | 70.65 | 68.62 | a | 69.35 | 70.97 | 63.87 | 66.94 | ||||||||||
1987 | 61.68 | 62.93 | 63.17 | a | 65.37 | c | 65.77 | 66.40 | 67.77 | 71.13 | 71.97 | 69.23 | ----- | z | 55.17 | m | 66.54 | b | ||||||||
1988 | 60.10 | 63.38 | 65.19 | 63.40 | 64.13 | 64.97 | 68.65 | 69.03 | 68.63 | 66.61 | 63.33 | 60.23 | 64.80 | |||||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 62.11 | 62.76 | 63.98 | 65.36 | 67.00 | 68.96 | 72.00 | 73.31 | 72.75 | 70.94 | 67.50 | 63.41 | 67.60 | |||||||||||||
S.D. | 2.94 | 3.00 | 2.82 | 2.98 | 2.89 | 3.20 | 3.18 | 3.13 | 3.14 | 2.99 | 2.72 | 2.69 | 2.08 | |||||||||||||
SKEW | -0.46 | 0.29 | 0.42 | 0.35 | 0.79 | 1.37 | 0.73 | 0.62 | 0.42 | -0.28 | 0.19 | 0.27 | 0.67 | |||||||||||||
MAX | 68.17 | 72.00 | 71.06 | 73.97 | 76.16 | 79.00 | 79.70 | 80.39 | 81.86 | 77.16 | 73.33 | 70.73 | 72.41 | |||||||||||||
MIN | 53.70 | 55.89 | 58.29 | 59.33 | 62.10 | 64.60 | 67.53 | 67.97 | 66.23 | 62.42 | 62.00 | 58.13 | 64.04 | |||||||||||||
YRS | 71 | 74 | 74 | 72 | 73 | 76 | 73 | 72 | 72 | 71 | 68 | 72 | 56 |