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 | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 97.39 | 89.60 | 76.74 | 68.90 | 58.65 | 78.25 | g | |||||
1933 | 51.97 | 58.21 | 74.06 | 76.03 | 84.10 | 94.03 | 97.32 | 92.68 | 88.97 | a | 81.42 | 68.33 | 67.52 | 77.89 | ||||||||||||
1934 | 67.87 | 69.39 | 74.71 | 79.40 | 86.71 | 94.90 | 98.65 | 96.65 | 90.63 | 82.06 | 75.67 | 64.68 | 81.78 | |||||||||||||
1935 | 62.68 | 62.86 | 68.90 | 78.87 | 78.52 | 93.57 | 96.10 | 86.87 | 80.60 | 80.39 | 64.83 | 57.10 | a | 75.94 | ||||||||||||
1936 | 58.84 | 59.34 | 67.13 | 77.20 | 86.52 | 95.30 | 95.06 | 94.13 | 86.47 | 79.61 | 64.63 | 59.23 | 76.96 | |||||||||||||
1937 | 54.94 | 61.41 | a | 65.29 | 78.70 | 87.65 | 94.50 | 98.06 | 96.81 | 89.03 | 79.65 | 70.30 | 56.70 | a | 77.75 | |||||||||||
1938 | 59.03 | a | 63.32 | 68.58 | 77.73 | 86.19 | 95.20 | 92.19 | 91.55 | 85.13 | 80.16 | 63.87 | 59.03 | 76.83 | ||||||||||||
1939 | 55.71 | 53.46 | 70.68 | 79.83 | 89.23 | 97.53 | 94.19 | 93.10 | 89.00 | 77.29 | 64.57 | 64.23 | 77.40 | |||||||||||||
1940 | 58.06 | 61.90 | 71.23 | 77.33 | 87.55 | 93.13 | 96.97 | 92.45 | 89.00 | 78.77 | 63.10 | 61.74 | 77.60 | |||||||||||||
1941 | 57.73 | a | 62.64 | 65.19 | 71.59 | a | 86.48 | 92.47 | 94.42 | 89.81 | 85.93 | 76.16 | 67.90 | 62.75 | g | 77.30 | a | |||||||||
1942 | 60.39 | 61.29 | 67.55 | 77.45 | a | 88.35 | 98.00 | 97.77 | 91.77 | 88.10 | 76.61 | 72.50 | 62.06 | 78.49 | ||||||||||||
1943 | 56.97 | 68.74 | a | 72.42 | 81.57 | 87.90 | 96.27 | 94.68 | 94.94 | 87.83 | 80.26 | ----- | z | 56.10 | 79.79 | a | ||||||||||
1944 | 46.68 | 61.41 | 66.81 | 70.30 | 85.68 | 95.10 | 96.84 | 94.94 | 90.37 | 82.77 | 64.13 | 60.71 | 76.31 | |||||||||||||
1945 | 55.77 | 66.57 | 70.58 | 77.87 | 89.16 | 95.27 | 99.84 | 95.26 | 92.10 | 78.45 | 73.97 | 64.00 | q | 81.35 | a | |||||||||||
1946 | 58.27 | a | 67.46 | 74.00 | 83.60 | 86.11 | c | 98.53 | 97.50 | s | 95.42 | 92.23 | 81.97 | ----- | z | 69.29 | 80.69 | b | ||||||||
1947 | 54.29 | 71.89 | 75.26 | ----- | z | 90.23 | 95.10 | a | 96.60 | a | 94.04 | c | 91.00 | 81.48 | 68.60 | 62.06 | 80.05 | a | ||||||||
1948 | 62.48 | d | 63.34 | 70.45 | 84.43 | p | 87.00 | 100.77 | 101.05 | i | 100.91 | t | 94.25 | b | 84.61 | ----- | z | ----- | z | 80.42 | e | |||||
1949 | ----- | z | 71.88 | t | 71.76 | f | 81.52 | a | 89.47 | a | 96.30 | 94.10 | a | 94.80 | a | 91.20 | 79.23 | 74.67 | 57.55 | 84.31 | c | |||||
1950 | 61.17 | h | 65.42 | d | 73.33 | d | 80.07 | c | 86.08 | e | 98.67 | 92.67 | m | 92.96 | d | 87.97 | 83.29 | 71.83 | 68.03 | 80.77 | b | |||||
1951 | 60.29 | ----- | z | 76.90 | u | ----- | z | 87.07 | a | 94.17 | 99.52 | 96.35 | 95.17 | a | 84.26 | 68.67 | 62.29 | 83.09 | c | |||||||
1952 | 63.19 | 63.41 | 66.13 | 74.59 | a | 89.00 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.83 | h | |||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | 64.53 | p | 69.89 | ----- | z | ----- | z | 88.00 | 96.21 | a | 96.45 | 90.19 | 91.80 | 84.45 | 71.34 | a | 60.94 | 83.25 | c | |||||||
1955 | 53.19 | 58.71 | 71.27 | a | 79.17 | 85.13 | 95.03 | 93.10 | 91.06 | 92.67 | 83.77 | 69.62 | a | 65.73 | a | 78.20 | ||||||||||
1956 | 65.87 | a | 61.93 | 76.63 | a | 77.53 | 91.55 | 98.83 | 94.87 | 92.48 | 94.37 | 82.32 | 66.47 | 59.58 | 80.20 | |||||||||||
1957 | 60.26 | 74.41 | f | 70.30 | k | 77.27 | h | 83.59 | i | 90.05 | j | 97.67 | j | 91.00 | i | 88.29 | i | 75.95 | i | 61.30 | j | 63.71 | j | 60.26 | k | |
1958 | 65.09 | i | 64.44 | j | 61.95 | j | 78.19 | i | 90.90 | k | 99.48 | i | 98.55 | i | 93.57 | j | 88.68 | k | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 66.81 | o | 64.48 | g | 72.44 | f | 81.00 | d | 87.25 | g | 98.15 | d | 97.28 | f | 88.68 | i | 90.40 | j | 82.68 | i | 67.12 | f | 60.21 | g | 89.58 | j |
1960 | 55.56 | f | 62.91 | f | 77.59 | i | 81.96 | f | 88.21 | l | 101.36 | e | 96.40 | f | 96.27 | i | 92.71 | i | 79.24 | f | 73.22 | g | 59.00 | j | 101.36 | k |
1961 | 59.17 | m | 67.61 | j | 73.67 | j | 81.33 | i | 90.57 | q | 98.43 | i | 98.19 | j | 92.68 | i | 86.54 | f | 82.12 | e | 63.08 | d | 59.58 | g | 72.60 | j |
1962 | 57.28 | b | 67.43 | e | 67.83 | b | 83.75 | b | 87.08 | f | 95.04 | b | 93.81 | e | 97.54 | e | 89.67 | f | 82.89 | c | 74.67 | c | 62.20 | f | 80.03 | c |
1963 | 60.37 | d | 69.88 | b | 73.69 | e | 80.12 | f | 90.68 | c | 95.61 | b | 97.33 | a | 88.26 | 90.75 | f | 83.90 | b | 69.96 | g | 61.00 | g | 82.47 | d | |
1964 | 58.93 | c | 60.04 | c | 67.62 | b | 76.82 | b | 88.62 | e | 94.28 | e | 96.48 | b | 92.33 | a | 85.38 | d | 82.41 | d | 68.05 | h | 62.65 | e | 78.69 | a |
1965 | 63.33 | d | 62.92 | b | 68.59 | d | 80.04 | d | 85.28 | b | 91.76 | e | 95.35 | e | 94.12 | e | 86.60 | e | 83.88 | e | 73.50 | h | 58.96 | e | 79.17 | a |
1966 | 56.96 | g | 58.22 | e | 73.11 | d | 80.00 | e | 88.24 | f | 96.00 | e | 97.48 | h | 91.96 | h | 86.96 | f | 80.85 | e | 74.91 | h | 62.44 | f | 77.63 | g |
1967 | 63.71 | g | 69.35 | e | 78.19 | d | 79.92 | e | 87.60 | f | 95.06 | n | 94.40 | f | 92.96 | e | 85.50 | f | 82.43 | h | 71.00 | f | 55.76 | j | 80.10 | h |
1968 | 59.20 | f | 66.12 | e | 67.81 | e | 73.88 | d | 85.64 | f | 96.33 | f | 93.75 | g | 89.83 | h | 89.48 | g | 84.69 | e | 69.00 | g | 61.60 | f | 73.13 | h |
1969 | 65.35 | e | 63.91 | e | 68.77 | e | 82.58 | d | 87.80 | f | 94.75 | f | 95.29 | g | 97.28 | f | 90.21 | f | 80.44 | d | 68.35 | j | 62.17 | g | 72.21 | g |
1970 | 62.88 | g | 67.83 | e | 68.60 | f | 77.28 | e | 87.88 | g | 95.76 | e | 96.54 | g | 93.92 | e | 88.17 | f | 77.48 | f | 72.91 | g | 65.42 | g | 83.70 | h |
1971 | 63.75 | g | 67.05 | h | 76.52 | f | 77.96 | d | 85.42 | g | 96.04 | f | 97.85 | e | 90.23 | a | 88.96 | d | 74.92 | e | 69.08 | d | 57.72 | f | 83.17 | f |
1972 | 63.81 | e | 68.17 | e | 78.90 | b | 80.79 | k | 86.43 | c | 94.00 | c | 97.97 | b | 93.03 | b | 87.48 | e | 78.28 | f | 64.85 | d | 60.81 | d | 79.54 | b |
1973 | 55.52 | d | 60.18 | f | 63.21 | c | 73.20 | 85.34 | b | 94.45 | a | 96.26 | d | 93.58 | g | 90.89 | c | 83.11 | c | 70.92 | d | 65.39 | c | 77.83 | b | |
1974 | 61.07 | d | 66.33 | d | 75.48 | b | 81.36 | b | 89.00 | b | 100.78 | c | 92.85 | e | 90.97 | b | 84.89 | c | 75.86 | c | 67.90 | a | 58.12 | f | 80.59 | a |
1975 | 60.27 | a | 63.96 | e | 69.53 | a | 74.37 | 83.86 | b | 95.20 | 93.18 | c | 94.54 | e | 85.76 | e | 80.96 | e | 71.12 | e | 62.42 | e | 77.93 | |||
1976 | 61.46 | e | ----- | z | 72.27 | e | 76.78 | g | 85.71 | g | 96.42 | d | 93.35 | e | 94.85 | e | 85.46 | d | 72.92 | f | 66.21 | f | 59.33 | g | 83.97 | f |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 92.60 | f | 91.90 | 89.45 | j | 77.67 | p | 69.72 | l | 63.00 | j | 91.90 | k | |
1978 | 59.00 | g | 61.62 | g | 73.00 | m | 78.21 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 59.09 | 64.15 | 70.76 | 78.20 | 87.03 | 95.93 | 95.90 | 93.24 | 89.00 | 80.91 | 68.72 | 61.74 | 77.95 | |||||||||||||
S.D. | 4.42 | 4.20 | 3.90 | 3.24 | 2.51 | 2.29 | 2.08 | 2.51 | 3.26 | 2.74 | 3.77 | 3.60 | 1.57 | |||||||||||||
SKEW | -0.47 | -0.27 | 0.22 | -0.52 | -1.09 | 0.72 | 0.02 | -0.40 | -0.20 | -0.54 | 0.14 | 0.41 | 1.19 | |||||||||||||
MAX | 67.87 | 71.89 | 78.90 | 83.75 | 91.55 | 101.36 | 99.84 | 97.54 | 95.17 | 84.69 | 75.67 | 69.29 | 81.78 | |||||||||||||
MIN | 46.68 | 53.46 | 63.21 | 70.30 | 78.52 | 91.76 | 92.19 | 86.87 | 80.60 | 74.92 | 63.08 | 56.10 | 75.94 | |||||||||||||
YRS | 31 | 33 | 33 | 32 | 29 | 35 | 29 | 34 | 31 | 35 | 27 | 25 | 13 |