YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.92 | f | 77.81 | 77.81 | k | |
1922 | 65.16 | 68.71 | 76.45 | 76.43 | 79.97 | 88.33 | 95.03 | b | 95.13 | 96.10 | 81.36 | f | 70.67 | 62.70 | a | 79.52 | a | |||||||||
1923 | 67.45 | 63.36 | 68.47 | a | 69.13 | 80.84 | 83.60 | 93.16 | 92.23 | 81.07 | o | 78.54 | c | 75.54 | b | 63.00 | a | 75.94 | a | |||||||
1924 | 65.48 | b | 73.38 | 67.84 | l | 67.87 | 82.58 | 90.27 | 91.45 | 94.06 | 94.97 | 78.61 | 74.80 | 72.48 | 80.54 | a | ||||||||||
1925 | 74.61 | 79.88 | c | 72.35 | 67.48 | a | 79.03 | 83.73 | 93.48 | 92.48 | 89.80 | 81.97 | 77.30 | 72.52 | 80.39 | |||||||||||
1926 | 69.19 | 64.86 | 70.94 | 75.33 | 83.94 | 90.90 | 95.68 | 96.77 | 85.13 | 80.55 | 73.33 | 67.77 | 79.53 | |||||||||||||
1927 | 69.23 | 69.82 | 71.55 | 75.23 | 78.50 | a | 80.90 | 96.39 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.37 | e | |||||
1928 | ----- | z | 69.69 | 72.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.91 | j | ||
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 | 68.45 | 66.23 | ----- | z | ----- | z | 92.97 | 92.00 | 84.57 | 83.29 | 74.50 | 64.39 | 78.30 | d | ||||||||
1934 | 66.48 | 65.93 | 80.23 | 79.93 | 82.10 | 77.41 | a | 91.32 | 92.39 | 87.27 | 80.61 | 70.70 | 64.94 | 78.28 | ||||||||||||
1935 | 58.77 | 63.93 | 61.58 | 68.07 | 70.90 | 85.33 | 88.97 | 91.13 | 89.10 | 77.32 | 67.00 | b | 64.61 | 73.89 | ||||||||||||
1936 | 63.55 | 59.76 | 71.39 | 73.37 | 78.70 | d | 87.96 | b | 93.17 | a | 92.42 | 92.07 | 78.45 | 72.76 | a | 63.19 | 77.23 | |||||||||
1937 | 48.13 | 58.61 | 66.42 | 73.17 | 77.03 | 84.07 | 91.58 | 93.45 | 89.93 | 82.87 | 73.03 | 64.48 | 75.23 | |||||||||||||
1938 | 65.35 | 59.22 | a | 61.45 | 70.23 | 77.55 | 81.07 | 89.97 | 91.77 | 91.87 | 77.52 | 68.83 | 64.45 | 74.94 | ||||||||||||
1939 | 61.77 | 57.89 | 63.58 | 78.10 | 78.13 | 85.40 | 90.84 | 93.74 | 87.67 | 78.13 | 76.07 | 71.03 | 76.86 | |||||||||||||
1940 | 61.58 | 61.76 | 67.68 | 71.13 | 79.55 | 86.00 | 90.13 | 91.77 | 84.40 | 81.65 | 69.10 | 66.11 | c | 75.90 | ||||||||||||
1941 | 59.06 | 61.56 | a | 64.97 | 64.70 | 76.77 | 79.43 | ----- | z | 87.71 | 82.17 | 73.74 | 72.97 | 58.81 | 71.08 | a | ||||||||||
1942 | 61.45 | 61.29 | 66.97 | 64.90 | 66.97 | 83.87 | 94.97 | a | 90.94 | 85.67 | 78.77 | a | 72.70 | 66.42 | 74.57 | |||||||||||
1943 | 60.77 | 64.04 | 64.19 | 71.07 | 79.19 | 79.53 | 89.00 | 88.94 | 90.63 | 81.29 | 72.03 | 58.06 | 74.90 | |||||||||||||
1944 | 57.29 | 57.00 | a | 63.94 | 67.30 | 71.39 | 75.90 | a | 85.39 | 93.68 | 85.57 | 80.19 | 62.30 | 63.10 | 71.92 | |||||||||||
1945 | 62.94 | 62.64 | 58.94 | 72.13 | 72.32 | 80.17 | 94.71 | 93.68 | 89.37 | 77.71 | 69.83 | 62.97 | 74.78 | |||||||||||||
1946 | 64.10 | 65.54 | 67.10 | a | ----- | z | 73.84 | 90.90 | 95.90 | 96.35 | 94.77 | 77.39 | 64.10 | 65.29 | 77.75 | a | ||||||||||
1947 | 62.03 | 70.29 | 69.33 | a | 72.03 | a | 80.94 | 85.72 | a | 97.90 | 92.13 | 93.60 | 80.65 | 69.57 | 62.32 | 78.04 | ||||||||||
1948 | 69.90 | 61.97 | 60.94 | ----- | z | 77.00 | 82.83 | 92.00 | 93.45 | 90.41 | a | 79.32 | 72.60 | 58.97 | 76.31 | a | ||||||||||
1949 | 49.10 | a | 59.86 | 64.32 | 78.27 | 71.77 | 86.87 | 92.90 | 93.26 | 95.73 | 82.00 | a | 82.83 | 64.94 | 76.82 | |||||||||||
1950 | 58.20 | a | 70.96 | 74.43 | a | 79.20 | 79.90 | a | 85.97 | 91.50 | a | 94.35 | 86.30 | 84.81 | 75.80 | 71.29 | 79.39 | |||||||||
1951 | 62.32 | 65.39 | 68.74 | 70.37 | 79.90 | 82.37 | 92.61 | 91.74 | 93.87 | 84.27 | i | 68.90 | a | 57.87 | 75.83 | a | ||||||||||
1952 | 56.55 | 62.74 | b | 58.48 | 70.23 | 83.29 | 79.47 | 93.06 | 94.19 | 93.43 | 85.90 | a | 64.60 | 56.00 | i | 76.54 | a | |||||||||
1953 | 65.94 | 66.32 | 66.97 | 67.30 | 69.03 | 79.43 | 94.19 | 89.52 | 91.00 | 79.29 | 70.40 | 64.71 | 75.34 | |||||||||||||
1954 | 59.42 | 69.86 | 60.67 | a | 73.03 | 79.33 | a | 82.18 | b | 95.34 | b | 87.77 | a | 89.14 | b | 80.39 | 73.18 | b | 61.79 | b | 76.01 | |||||
1955 | 55.90 | 60.56 | a | 67.86 | b | 68.69 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.25 | h | |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | 71.04 | d | 85.27 | 92.84 | 97.71 | 92.31 | a | 82.29 | 74.34 | a | 69.65 | 83.18 | d | |||||
1963 | 62.81 | 73.32 | 67.84 | 67.57 | 75.65 | 80.53 | 92.23 | 92.90 | 93.93 | 80.94 | 68.97 | 69.23 | 77.16 | |||||||||||||
1964 | 61.26 | 65.66 | 65.84 | 68.27 | 75.10 | 82.47 | 94.61 | 92.42 | 86.80 | 85.26 | 64.07 | 61.29 | 75.25 | |||||||||||||
1965 | 63.65 | 66.71 | 65.10 | 68.43 | 77.26 | 75.17 | 90.97 | 93.87 | 81.57 | 86.68 | 67.87 | 60.00 | 74.77 | |||||||||||||
1966 | 60.74 | 60.36 | 70.45 | 77.87 | 76.94 | 86.63 | 92.55 | 94.84 | 88.30 | 81.77 | 68.80 | 63.16 | 76.87 | |||||||||||||
1967 | 64.16 | 68.39 | 65.84 | 59.30 | 77.16 | 78.67 | 95.58 | 98.65 | 89.56 | e | 86.06 | 74.83 | 58.00 | 76.35 | ||||||||||||
1968 | 62.42 | 67.17 | 69.45 | 72.97 | 77.77 | 85.50 | 93.03 | 89.45 | 90.03 | 80.68 | 71.63 | 60.00 | c | 76.68 | ||||||||||||
1969 | 62.68 | 57.57 | 66.58 | 71.33 | 78.87 | 76.17 | 92.03 | 97.84 | 92.07 | 77.87 | 71.37 | 64.77 | 75.76 | |||||||||||||
1970 | 62.48 | 66.75 | 68.16 | 70.70 | 80.10 | 86.60 | 96.68 | 96.90 | 91.00 | 79.77 | 71.90 | 58.74 | 77.48 | |||||||||||||
1971 | 64.23 | 65.78 | a | 69.00 | 70.73 | 72.55 | 83.10 | 94.94 | 97.00 | 90.67 | 78.55 | 70.60 | 56.03 | 76.10 | ||||||||||||
1972 | 63.87 | 70.55 | 77.90 | 76.00 | ----- | z | 87.83 | 96.10 | 93.10 | 86.20 | 76.20 | f | 67.21 | a | 60.87 | 77.96 | b | |||||||||
1973 | 58.77 | 60.93 | 60.23 | 71.73 | 80.42 | 90.37 | 93.45 | 93.87 | 85.90 | 82.35 | 67.43 | 66.20 | a | 75.97 | ||||||||||||
1974 | 57.94 | 66.46 | 64.35 | 73.47 | 78.48 | 90.22 | c | 94.16 | 93.16 | 94.63 | 78.16 | 71.80 | 63.71 | 77.21 | ||||||||||||
1975 | 66.42 | 61.96 | 63.84 | 61.97 | 80.13 | 84.80 | 94.42 | 93.94 | 94.37 | 80.52 | 73.50 | 68.52 | 77.03 | |||||||||||||
1976 | 70.45 | 65.03 | 68.39 | 69.43 | 82.71 | 90.30 | ----- | z | ----- | z | 83.87 | 82.26 | 77.00 | 70.32 | 75.98 | b | ||||||||||
1977 | 62.39 | 73.07 | 65.77 | 79.10 | 70.03 | 88.13 | 97.61 | 94.71 | 87.37 | 86.39 | 77.33 | 68.52 | 79.20 | |||||||||||||
1978 | 61.61 | 63.29 | 68.03 | 66.43 | 82.29 | 90.73 | 96.52 | 94.29 | 89.67 | ----- | z | ----- | z | 61.39 | 77.42 | b | ||||||||||
1979 | 57.03 | 60.21 | 65.74 | ----- | z | ----- | z | 90.67 | 96.42 | ----- | z | ----- | z | ----- | z | 69.90 | ----- | z | 73.33 | f | ||||||
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 85.67 | 96.61 | 92.10 | 88.77 | ----- | z | ----- | z | 73.03 | 87.24 | g | |||||
1981 | 69.13 | ----- | z | 63.84 | 72.63 | 78.87 | 94.43 | 95.48 | 98.32 | 92.20 | 76.67 | a | 76.30 | ----- | z | 81.79 | b | |||||||||
1982 | 62.29 | 66.32 | 62.84 | 71.34 | a | 77.29 | 79.83 | 95.21 | b | 97.35 | 88.13 | 82.77 | 67.60 | 65.19 | 76.35 | |||||||||||
1983 | 65.74 | 64.00 | 64.32 | 65.37 | 80.71 | 81.77 | 93.17 | a | 93.65 | 92.33 | 80.81 | 67.53 | 62.84 | 76.02 | ||||||||||||
1984 | 67.97 | 70.03 | 74.61 | 76.23 | 88.03 | a | 88.57 | b | 97.61 | 96.94 | 96.63 | 78.97 | 67.17 | ----- | z | 82.07 | a | |||||||||
1985 | 62.26 | 67.57 | 66.10 | 81.30 | 80.80 | a | 91.93 | 98.07 | a | 96.23 | 83.57 | 81.87 | 66.77 | 67.74 | 78.68 | |||||||||||
1986 | 72.06 | 64.96 | 71.40 | a | 74.03 | 81.67 | a | 89.73 | 90.84 | 98.77 | 81.37 | 81.16 | 75.60 | 67.65 | 79.10 | |||||||||||
1987 | 62.19 | 65.54 | 68.13 | ----- | z | 82.35 | 91.03 | 87.45 | 94.06 | 93.03 | ----- | z | 68.60 | 57.77 | 77.02 | b | ||||||||||
1988 | 63.90 | 70.03 | 74.97 | 75.63 | 82.58 | 89.47 | 95.13 | 94.06 | 91.40 | 86.70 | a | 72.20 | ----- | z | 81.46 | a | ||||||||||
1989 | ----- | z | 62.32 | 75.97 | 83.33 | 81.52 | 87.83 | 94.42 | ----- | z | 94.47 | 81.65 | 78.50 | 71.16 | 81.12 | b | ||||||||||
1990 | 67.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.97 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 62.93 | 65.20 | 67.55 | 71.69 | 78.09 | 84.96 | 93.55 | 93.72 | 89.71 | 80.86 | 71.40 | 64.74 | 76.57 | |||||||||||||
S.D. | 4.91 | 4.65 | 4.75 | 4.99 | 4.25 | 4.63 | 2.68 | 2.63 | 3.94 | 2.87 | 4.08 | 4.71 | 1.79 | |||||||||||||
SKEW | -0.48 | 0.55 | 0.46 | 0.08 | -0.61 | -0.20 | -0.63 | -0.08 | -0.29 | 0.27 | 0.15 | 0.41 | 0.00 | |||||||||||||
MAX | 74.61 | 79.88 | 80.23 | 83.33 | 88.03 | 94.43 | 98.07 | 98.77 | 96.63 | 86.70 | 82.83 | 77.81 | 80.39 | |||||||||||||
MIN | 48.13 | 57.00 | 58.48 | 59.30 | 66.97 | 75.17 | 85.39 | 87.71 | 81.37 | 73.74 | 62.30 | 56.03 | 71.92 | |||||||||||||
YRS | 54 | 54 | 55 | 51 | 52 | 55 | 54 | 52 | 53 | 48 | 53 | 51 | 35 |