YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | ----- | z | 66.00 | j | 71.42 | 76.67 | 86.55 | 97.50 | 101.26 | 94.16 | 93.40 | 84.10 | a | 70.17 | 64.81 | 84.00 | b | |||||||||
1907 | 54.42 | 71.32 | 72.39 | 82.10 | 84.16 | 93.10 | 97.42 | 94.65 | 95.87 | 78.06 | 68.67 | 67.52 | 79.97 | |||||||||||||
1908 | 65.68 | 62.00 | 75.94 | 73.90 | 83.03 | 95.83 | 95.90 | 93.74 | 87.23 | 80.32 | 73.63 | 63.16 | 79.20 | |||||||||||||
1909 | 67.13 | a | 64.79 | 64.57 | a | 80.33 | 87.06 | 97.17 | ----- | z | 93.19 | 89.20 | 85.61 | 73.67 | 59.81 | 78.41 | a | |||||||||
1910 | 62.06 | 66.96 | 79.29 | ----- | z | ----- | z | 98.14 | a | 98.83 | a | 97.06 | 95.87 | 85.84 | 73.20 | 68.58 | 82.58 | b | ||||||||
1911 | 66.23 | ----- | z | 79.55 | 82.93 | a | 90.52 | 99.07 | 95.00 | 100.13 | 95.70 | 84.65 | 72.60 | 61.04 | e | 84.31 | a | |||||||||
1912 | 68.45 | 71.90 | 71.37 | a | 75.83 | 90.58 | 99.60 | 93.07 | c | 97.45 | 93.00 | ----- | z | ----- | z | 56.17 | a | 81.74 | b | |||||||
1913 | 56.70 | a | 59.79 | 66.13 | a | 79.70 | 90.61 | c | 95.27 | 102.00 | p | 96.39 | 94.03 | ----- | z | 68.60 | 60.23 | 76.74 | b | |||||||
1914 | 65.90 | 66.32 | 74.32 | 79.80 | 88.81 | 96.33 | 97.00 | 97.68 | 94.73 | 82.06 | 75.10 | 57.07 | a | 81.26 | ||||||||||||
1915 | 60.76 | b | 63.29 | 68.70 | a | 81.29 | i | 83.80 | a | 97.80 | 98.03 | 99.93 | b | ----- | z | ----- | z | ----- | z | ----- | z | 81.76 | e | |||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.90 | b | 74.70 | 61.48 | 72.69 | i | ||
1917 | 59.19 | ----- | z | 72.19 | 80.46 | d | 82.48 | j | 98.00 | a | 96.77 | 95.62 | e | 90.09 | g | 86.81 | 78.43 | g | 72.48 | h | 84.15 | e | ||||
1918 | 56.23 | r | 68.00 | 74.13 | 80.30 | 84.48 | 100.83 | 98.69 | b | 94.27 | a | 94.83 | 87.58 | 69.27 | 61.13 | 83.05 | a | |||||||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | 89.74 | 102.15 | d | 96.39 | 99.55 | 94.10 | j | 85.43 | a | ----- | z | 67.42 | 90.11 | f | ||||
1920 | 66.46 | c | 68.82 | a | 69.67 | a | 76.67 | 89.55 | 96.40 | 103.10 | 96.16 | 90.33 | 80.68 | 72.13 | 64.58 | 81.21 | ||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | 75.73 | e | 80.50 | d | 84.52 | f | 99.32 | e | 98.77 | e | 99.96 | e | 99.12 | f | 85.48 | d | 76.17 | f | 64.50 | g | 89.96 | f |
1954 | 66.08 | g | 74.29 | d | 70.41 | d | 85.69 | d | 91.35 | e | 97.81 | d | 98.88 | e | 95.35 | e | 96.32 | e | 88.92 | e | 78.50 | d | 67.16 | f | 87.75 | b |
1955 | 56.48 | f | 61.92 | d | 72.96 | e | 77.60 | e | 86.75 | g | 95.62 | d | 94.69 | e | 89.85 | d | 92.96 | e | 86.27 | e | 71.12 | e | 70.52 | h | 82.55 | c |
1956 | 70.08 | f | 62.71 | e | 78.95 | l | 80.35 | g | 93.50 | e | 100.96 | d | 98.48 | f | 97.48 | d | 99.21 | f | 85.67 | d | 72.52 | e | 66.36 | f | 85.47 | f |
1957 | 63.58 | e | 74.04 | d | 73.86 | j | 79.16 | e | 85.12 | f | 100.28 | e | 100.63 | d | 97.03 | b | 95.59 | c | 80.07 | d | 66.36 | e | 67.72 | f | 84.08 | c |
1958 | 65.12 | e | 67.22 | e | 64.42 | e | 77.76 | e | 94.31 | e | 99.27 | d | 101.23 | e | 96.19 | e | 92.26 | g | 83.67 | d | 70.55 | h | 70.77 | i | 83.24 | c |
1959 | 69.19 | e | 65.83 | e | 75.08 | g | 84.22 | c | 89.08 | g | 100.63 | 99.97 | b | 92.04 | d | 92.85 | d | 83.31 | b | 70.96 | d | 62.57 | h | 84.33 | c | |
1960 | 58.38 | b | 61.77 | c | 76.80 | a | 82.12 | d | 87.59 | d | 100.76 | e | 101.00 | f | 97.44 | d | 95.57 | g | 81.35 | e | 74.29 | f | 61.74 | h | 80.78 | d |
1961 | 64.15 | e | 67.39 | e | 71.17 | g | 81.00 | g | 89.77 | e | 100.00 | d | 99.95 | i | 94.23 | e | 90.30 | g | 83.50 | i | 66.09 | g | 60.26 | h | 83.11 | g |
1962 | 60.36 | f | 67.12 | d | 66.29 | g | 86.57 | g | 86.75 | g | 96.48 | g | 99.33 | g | 101.59 | d | 91.19 | n | 83.77 | e | 76.41 | h | 65.00 | l | 84.16 | i |
1963 | 60.33 | g | 71.57 | e | 70.40 | f | 76.15 | d | 91.67 | g | 94.54 | f | 100.88 | e | 92.81 | d | 94.29 | f | 87.22 | d | 71.60 | e | 65.68 | f | 83.37 | f |
1964 | 60.42 | e | 61.33 | e | 65.58 | e | 76.38 | d | 87.12 | f | 95.12 | d | 98.31 | e | 92.23 | e | 88.92 | e | 86.59 | d | 65.52 | g | 63.17 | g | 80.54 | c |
1965 | 63.96 | f | 63.17 | e | 66.76 | f | 77.58 | d | 84.72 | f | 91.96 | d | 98.50 | e | 97.73 | e | 90.84 | e | 87.65 | e | 74.96 | f | 61.88 | e | 83.67 | d |
1966 | 58.52 | f | 57.17 | e | 72.00 | d | 80.65 | d | 90.24 | f | 97.50 | d | 99.17 | b | 95.64 | c | 90.29 | b | 82.32 | c | 73.93 | c | 64.33 | d | 81.30 | b |
1967 | 63.73 | e | 69.39 | e | 76.00 | d | 75.14 | h | 87.04 | g | 92.90 | a | 96.44 | d | 96.39 | c | 93.00 | f | 85.32 | f | 75.92 | e | 56.91 | h | 81.54 | e |
1968 | 62.22 | h | 69.40 | d | 69.38 | e | 75.40 | e | 88.04 | f | 98.42 | f | 96.75 | g | 92.50 | i | 95.94 | l | 87.18 | i | 72.25 | j | 62.76 | j | 71.39 | i |
1969 | 66.52 | h | 64.00 | h | 67.62 | j | 82.36 | h | 89.29 | j | 95.10 | i | 99.77 | i | 101.70 | k | 95.90 | i | 81.70 | h | 70.95 | j | 64.85 | k | ----- | z |
1970 | 63.43 | j | 71.05 | h | 67.68 | i | 74.18 | h | 90.71 | j | 98.45 | h | 100.14 | i | 97.33 | j | 91.43 | i | 79.09 | i | 76.55 | j | 64.33 | j | ----- | z |
1971 | 65.37 | l | 67.50 | h | 74.87 | h | 77.45 | h | 84.80 | k | 95.59 | h | 100.86 | j | 92.64 | i | 92.86 | i | 77.19 | j | 69.05 | j | 57.50 | i | ----- | z |
1972 | 65.76 | j | 69.62 | h | 80.78 | h | 82.15 | j | 88.14 | i | 94.95 | h | 100.45 | k | 97.43 | h | 93.20 | j | 77.73 | i | 64.96 | d | 59.16 | 62.06 | j | |
1973 | 60.16 | f | 62.58 | b | 61.43 | a | 74.23 | 89.00 | f | 97.18 | b | 99.07 | d | 98.00 | h | 94.45 | j | 86.00 | h | 75.19 | i | ----- | z | 78.90 | g | |
1974 | 61.14 | j | 66.20 | h | 73.92 | f | 78.74 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 63.20 | 66.16 | 71.49 | 79.01 | 88.55 | 97.73 | 98.25 | 96.07 | 92.89 | 84.21 | 71.88 | 62.40 | 80.41 | |||||||||||||
S.D. | 4.14 | 4.45 | 4.82 | 3.10 | 3.33 | 2.60 | 2.35 | 2.74 | 2.79 | 2.79 | 3.26 | 3.64 | 1.00 | |||||||||||||
SKEW | -0.55 | 0.07 | -0.27 | 0.27 | -0.14 | -0.45 | -0.15 | -0.07 | -0.52 | -0.38 | -0.24 | 0.10 | -0.28 | |||||||||||||
MAX | 69.19 | 74.29 | 79.55 | 85.69 | 94.31 | 102.15 | 103.10 | 101.59 | 96.32 | 88.92 | 78.50 | 68.58 | 81.26 | |||||||||||||
MIN | 54.42 | 57.17 | 61.43 | 73.90 | 83.03 | 91.96 | 93.07 | 89.85 | 87.23 | 78.06 | 64.96 | 56.17 | 79.20 | |||||||||||||
YRS | 18 | 26 | 23 | 24 | 17 | 28 | 24 | 29 | 18 | 25 | 20 | 16 | 4 |