YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.40 | a | 70.00 | 58.40 | a | 68.93 | i | |
1913 | 56.97 | 61.68 | 70.06 | 80.15 | c | 87.74 | h | 95.27 | s | 97.17 | a | ----- | z | ----- | z | 85.04 | h | 71.30 | 59.97 | 71.04 | e | |||||
1914 | 64.71 | 67.39 | 76.13 | 82.37 | 89.74 | 96.37 | ----- | z | ----- | z | 91.92 | r | 76.27 | i | 74.21 | a | 56.62 | g | 78.70 | e | ||||||
1915 | 56.68 | c | 62.81 | a | 67.79 | c | 76.90 | 82.19 | 96.70 | 97.87 | 97.00 | x | 88.69 | q | 85.71 | 72.60 | 59.87 | 75.91 | b | |||||||
1916 | 58.39 | 69.69 | 77.30 | a | 80.20 | 87.11 | d | 99.50 | 97.57 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.39 | e | ||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | 63.32 | f | 66.64 | 70.87 | 74.97 | 92.23 | 95.07 | a | 97.39 | 96.03 | a | 90.37 | 79.52 | 72.77 | 62.35 | 81.65 | a | |||||||||
1942 | 64.10 | 64.46 | 71.26 | 79.40 | 89.52 | 99.30 | 102.13 | 97.58 | 95.17 | 83.16 | 76.77 | 66.16 | 82.42 | |||||||||||||
1943 | 60.90 | 72.48 | a | 75.00 | 86.76 | a | 93.03 | 97.83 | 101.68 | 96.56 | f | 95.03 | 84.13 | 75.07 | 63.00 | 82.27 | a | |||||||||
1944 | 62.13 | 64.79 | 71.81 | 79.60 | 90.06 | 96.40 | 100.77 | 100.68 | 93.80 | 85.52 | 68.80 | 63.68 | 81.50 | |||||||||||||
1945 | 62.97 | 70.36 | 69.29 | 80.17 | 91.00 | 97.90 | 101.58 | 98.45 | 97.40 | 86.71 | 78.03 | 64.43 | a | 83.19 | ||||||||||||
1946 | 59.87 | 71.18 | 77.13 | a | 88.23 | 91.10 | a | 103.33 | 100.26 | 97.19 | 94.67 | 80.83 | b | 68.10 | a | 67.58 | 83.29 | |||||||||
1947 | 59.84 | 74.79 | 76.37 | a | 80.62 | a | 94.28 | b | 97.14 | a | 103.20 | a | 96.61 | 97.27 | 86.29 | 68.62 | a | 60.83 | a | 82.99 | ||||||
1948 | 65.83 | a | 65.56 | b | 69.10 | 86.45 | a | 93.61 | 100.00 | 102.77 | a | 100.52 | 97.60 | 83.68 | 69.87 | 61.48 | 83.04 | |||||||||
1949 | 52.77 | 63.54 | 76.55 | 83.80 | 90.23 | 97.90 | 100.39 | 101.48 | 97.17 | 84.00 | 79.23 | 61.77 | 82.40 | |||||||||||||
1950 | 63.94 | 71.54 | 77.69 | b | 88.00 | 90.65 | 99.30 | 97.35 | 100.97 | 93.00 | 92.81 | ----- | z | 71.32 | 86.05 | a | ||||||||||
1951 | 62.84 | 67.39 | 73.52 | 81.00 | 90.97 | 97.93 | 103.06 | 99.71 | 97.63 | 85.00 | 71.13 | 58.26 | 82.37 | |||||||||||||
1952 | 61.26 | 66.86 | 66.87 | 80.33 | 93.29 | 99.90 | 102.30 | h | 101.13 | 98.83 | 91.67 | g | 69.55 | a | 60.52 | d | 79.85 | b | ||||||||
1953 | 67.45 | 69.50 | j | 72.74 | 79.83 | 84.06 | 100.67 | 99.43 | a | 98.58 | 98.03 | 85.10 | 75.63 | 58.90 | b | 83.68 | a | |||||||||
1954 | 63.77 | 74.14 | 71.39 | 85.86 | a | 90.68 | 98.93 | 101.97 | b | 94.83 | a | 95.70 | 89.42 | 78.04 | b | 66.30 | a | 84.25 | ||||||||
1955 | 58.58 | 62.75 | 74.52 | 82.07 | 89.14 | b | 96.97 | 98.06 | 93.41 | b | 95.20 | 87.03 | a | 75.10 | 67.23 | 81.67 | ||||||||||
1956 | 67.17 | b | 63.70 | b | 79.32 | 81.34 | a | 93.06 | 102.00 | 99.77 | 98.90 | 100.87 | 86.77 | a | 70.07 | a | 64.94 | 83.99 | ||||||||
1957 | 61.81 | 73.63 | a | 73.03 | 78.60 | 84.00 | 99.76 | a | 102.32 | 96.13 | a | 95.83 | 78.35 | 65.83 | 63.93 | a | 81.10 | |||||||||
1958 | 62.13 | 65.00 | 61.61 | 79.17 | 94.52 | 101.70 | 102.00 | 99.32 | 93.33 | 84.33 | a | 71.70 | 69.61 | 82.04 | ||||||||||||
1959 | 68.00 | 66.43 | 75.55 | 84.50 | 89.74 | 101.27 | 101.32 | 95.77 | 95.63 | 84.90 | 69.33 | 62.48 | 82.91 | |||||||||||||
1960 | 57.20 | a | 61.71 | a | 76.55 | 84.03 | 90.74 | 104.00 | 102.13 | 100.90 | 98.21 | a | 81.58 | 73.37 | 61.00 | 82.62 | ||||||||||
1961 | 63.26 | 70.11 | 73.97 | 84.14 | b | 91.00 | 101.38 | a | 101.81 | 96.97 | 90.43 | 81.65 | 65.23 | 58.84 | 81.56 | |||||||||||
1962 | 59.77 | 65.82 | 66.87 | 85.97 | 85.78 | v | 97.20 | 99.68 | 101.00 | 94.10 | 83.71 | 74.73 | 63.71 | 81.14 | a | |||||||||||
1963 | 58.77 | 70.21 | 72.29 | 79.60 | 92.52 | 96.50 | 102.87 | 94.13 | 94.83 | 87.45 | 70.90 | 63.39 | 81.96 | |||||||||||||
1964 | 59.19 | 62.17 | 68.32 | 78.17 | 89.68 | 96.67 | 101.58 | 97.42 | 89.04 | d | 86.58 | 66.93 | 59.77 | 79.63 | ||||||||||||
1965 | 62.84 | 64.04 | 68.32 | 78.67 | 87.16 | 94.43 | 100.39 | 100.60 | a | 91.30 | 88.35 | 73.33 | 58.63 | a | 80.67 | |||||||||||
1966 | 56.87 | 59.54 | 74.13 | 83.00 | 92.32 | 98.90 | a | 103.47 | a | 98.23 | a | 90.56 | c | 83.13 | 74.10 | a | 61.48 | 81.31 | ||||||||
1967 | 62.81 | 70.44 | a | 78.03 | 78.43 | 88.90 | a | 96.20 | 99.94 | 97.61 | c | 93.07 | 85.77 | 73.32 | b | 55.84 | 81.70 | |||||||||
1968 | 61.00 | 69.93 | 70.42 | 77.36 | b | 88.90 | 100.48 | a | 99.45 | 94.70 | a | 94.27 | 85.35 | 69.53 | 57.55 | 80.75 | ||||||||||
1969 | 62.55 | 64.14 | 69.58 | 82.45 | a | 91.35 | 98.00 | 102.68 | f | 103.00 | 95.62 | d | 81.65 | e | 67.76 | a | 61.00 | c | 79.74 | a | ||||||
1970 | 61.03 | a | 68.89 | 69.52 | 77.57 | 91.08 | e | 100.25 | j | 104.74 | h | ----- | z | 87.08 | r | 78.97 | 72.04 | b | 61.81 | 72.61 | d | |||||
1971 | 64.03 | b | 69.07 | a | 78.86 | c | 82.85 | j | 89.30 | h | ----- | z | ----- | z | 97.39 | 91.50 | 80.31 | b | 76.83 | 64.10 | a | 77.76 | d | |||
1972 | 74.71 | 80.00 | b | 82.83 | m | 85.28 | a | 91.71 | 98.07 | a | 105.47 | p | 98.90 | b | 93.93 | b | 76.84 | ----- | z | 56.68 | 84.01 | c | ||||
1973 | 53.26 | 58.25 | 58.74 | ----- | z | 87.61 | ----- | z | 98.83 | a | 98.42 | 92.27 | 82.35 | 69.04 | e | 60.65 | h | 77.64 | c | |||||||
1974 | 56.90 | b | 64.67 | j | 72.79 | c | 77.62 | a | 89.48 | f | 101.33 | f | 96.90 | 95.61 | 90.83 | 81.50 | m | ----- | z | 52.80 | p | 81.78 | f | |||
1975 | 56.42 | g | 61.64 | c | 66.41 | b | 71.59 | c | 85.10 | a | 96.93 | 98.55 | 98.03 | a | 89.28 | a | 79.50 | m | 66.81 | c | 57.85 | k | 81.59 | c | ||
1976 | 57.96 | d | 60.90 | 73.48 | j | 78.77 | ----- | z | 99.33 | 99.55 | 100.93 | a | 90.43 | 76.67 | d | 68.73 | 60.10 | 79.34 | b | |||||||
1977 | 58.90 | 69.82 | 62.26 | 77.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.10 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 61.36 | 67.01 | 71.84 | 81.03 | 90.07 | 98.68 | 100.39 | 98.27 | 94.35 | 83.77 | 71.74 | 62.14 | 82.15 | |||||||||||||
S.D. | 4.16 | 4.70 | 4.83 | 3.68 | 2.93 | 2.25 | 1.97 | 2.38 | 2.98 | 3.61 | 3.61 | 3.54 | 1.12 | |||||||||||||
SKEW | 0.58 | 0.42 | -0.67 | 0.04 | -0.92 | 0.42 | -0.24 | -0.12 | 0.00 | -0.05 | 0.24 | 0.59 | -0.16 | |||||||||||||
MAX | 74.71 | 80.00 | 79.32 | 88.23 | 94.52 | 104.00 | 103.47 | 103.00 | 100.87 | 92.81 | 79.23 | 71.32 | 84.25 | |||||||||||||
MIN | 52.77 | 58.25 | 58.74 | 71.59 | 82.19 | 94.43 | 96.90 | 93.41 | 89.04 | 76.67 | 65.23 | 55.84 | 79.63 | |||||||||||||
YRS | 39 | 39 | 39 | 39 | 35 | 35 | 34 | 34 | 35 | 35 | 37 | 36 | 22 |