YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 78.00 | i | 84.20 | 81.74 | 77.96 | h | ----- | z | ----- | z | ----- | z | ----- | z | 82.97 | j | ||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | 74.67 | a | 79.40 | 82.70 | a | 78.52 | 77.07 | 69.77 | a | 57.57 | 59.10 | 72.35 | d | |||||
1941 | 50.42 | 56.63 | a | 55.42 | 59.80 | 71.42 | 76.77 | 79.19 | 78.77 | 73.53 | 66.74 | 60.40 | 55.29 | 65.37 | ||||||||||||
1942 | 54.13 | 50.50 | 57.68 | 64.20 | 75.17 | b | 82.97 | 82.55 | 78.10 | 73.73 | 65.90 | 64.70 | 55.52 | 67.10 | ||||||||||||
1943 | 52.55 | 56.94 | k | 60.65 | 71.90 | 75.97 | 81.67 | 81.87 | 85.48 | 76.97 | 69.52 | 61.67 | 52.10 | 70.03 | a | |||||||||||
1944 | 53.16 | 55.48 | 58.45 | 65.40 | 74.48 | 84.17 | 83.00 | a | 81.74 | 74.60 | 67.55 | 56.10 | 53.74 | 67.32 | ||||||||||||
1945 | 53.35 | 59.21 | 60.74 | 67.20 | 79.45 | 83.77 | 83.84 | 82.61 | 79.76 | a | 70.23 | 64.93 | 53.03 | 69.84 | ||||||||||||
1946 | 47.35 | 58.11 | 62.13 | 72.83 | 74.71 | 85.70 | 84.48 | 83.32 | 78.07 | 70.58 | 56.90 | 58.81 | 69.42 | |||||||||||||
1947 | 47.71 | 57.00 | 59.61 | c | 66.03 | 76.55 | 85.00 | 86.71 | 80.90 | 82.57 | 73.30 | d | 54.33 | 50.42 | 68.34 | |||||||||||
1948 | 53.26 | 56.56 | b | 55.87 | 72.55 | a | 77.03 | a | 83.17 | 85.03 | 85.10 | 78.77 | 67.58 | 58.53 | 56.58 | 69.17 | ||||||||||
1949 | 42.73 | a | 53.64 | c | 61.86 | i | 65.87 | 76.71 | 83.57 | 81.42 | 80.10 | 75.53 | 65.13 | 66.63 | 52.45 | 67.62 | a | |||||||||
1950 | 57.00 | 59.71 | 63.26 | 71.00 | 76.74 | 84.07 | 78.50 | a | 81.31 | e | 74.80 | 75.19 | 65.73 | 60.29 | 70.63 | |||||||||||
1951 | 53.58 | 58.14 | 57.77 | 65.53 | 77.55 | 86.07 | 88.29 | 84.84 | 82.97 | 72.32 | 60.47 | 54.06 | 70.13 | |||||||||||||
1952 | 57.74 | 54.17 | 55.32 | 65.20 | 75.35 | 85.10 | 81.29 | 85.81 | 79.03 | 74.90 | 55.97 | 54.23 | a | 68.68 | ||||||||||||
1953 | 60.61 | 53.93 | 62.84 | 67.13 | 72.65 | 87.87 | 86.03 | 84.26 | 83.47 | 70.23 | 64.03 | 51.00 | 70.34 | |||||||||||||
1954 | 58.19 | 61.96 | 59.94 | 73.40 | 76.16 | 84.50 | 86.42 | 80.74 | 80.60 | 74.39 | h | 64.46 | b | 57.32 | 71.25 | a | ||||||||||
1955 | 49.55 | 54.15 | a | 61.63 | d | 68.43 | 75.16 | 83.40 | 79.29 | 80.19 | 81.20 | 71.32 | 61.50 | 59.00 | 68.74 | |||||||||||
1956 | 57.87 | 49.76 | 65.22 | d | 65.44 | e | 82.46 | g | 86.78 | c | 85.30 | a | 81.89 | d | 85.42 | f | 75.04 | g | 62.27 | d | 55.26 | h | 69.32 | d | ||
1957 | 55.86 | c | 61.74 | a | 58.77 | 66.13 | 70.37 | a | 84.45 | a | 84.86 | c | 79.78 | d | 78.68 | b | 66.69 | o | 49.56 | e | 57.00 | g | 69.02 | b | ||
1958 | 47.23 | 53.48 | a | 49.57 | a | 63.79 | a | 76.23 | 86.59 | a | 87.58 | 85.35 | 74.04 | b | 66.48 | 60.12 | m | 55.43 | a | 67.80 | a | |||||
1959 | 58.10 | 54.21 | 60.10 | 68.52 | a | 76.31 | b | 84.53 | 81.97 | 81.35 | 80.90 | a | 71.68 | 60.85 | c | 54.70 | a | 69.43 | ||||||||
1960 | 50.84 | 50.71 | a | 64.74 | 70.77 | 77.00 | 85.43 | 82.42 | 84.06 | 77.47 | 70.29 | 63.13 | 48.71 | 68.80 | ||||||||||||
1961 | 52.74 | 54.25 | 61.97 | 69.90 | a | 77.94 | 83.90 | a | 83.81 | 79.03 | a | 77.53 | 71.58 | 56.07 | b | 52.94 | 68.47 | |||||||||
1962 | 52.07 | a | 58.79 | 55.67 | a | 70.33 | 77.03 | 81.23 | 80.97 | 84.68 | 75.80 | 70.06 | 64.47 | 57.61 | 69.06 | |||||||||||
1963 | 49.93 | a | 56.43 | 60.10 | a | 69.86 | a | 77.74 | 84.10 | 82.97 | a | 79.65 | 76.43 | 72.68 | 64.53 | 56.16 | 69.22 | |||||||||
1964 | 51.16 | 50.04 | a | 57.68 | 67.00 | 76.26 | 84.67 | 85.48 | 84.65 | 75.90 | 71.90 | 60.67 | 55.81 | 68.43 | ||||||||||||
1965 | 57.48 | 53.00 | 55.00 | a | 68.90 | 74.73 | a | 80.20 | 84.06 | 78.19 | 75.27 | 70.97 | 63.70 | 54.78 | d | 68.02 | ||||||||||
1966 | 46.81 | 47.68 | 62.68 | 67.00 | a | 75.16 | 80.23 | 83.80 | a | 77.65 | 73.37 | 68.19 | 67.33 | 53.97 | 66.99 | |||||||||||
1967 | 56.35 | 57.61 | 67.29 | 70.57 | 76.55 | 81.17 | 84.13 | 78.70 | a | 72.76 | a | 69.74 | 62.50 | 48.29 | 68.80 | |||||||||||
1968 | 52.29 | 54.97 | 55.55 | 63.57 | 75.06 | 84.70 | 76.80 | a | 78.68 | 77.00 | 74.83 | a | 59.43 | 53.26 | 67.18 | |||||||||||
1969 | 58.42 | 54.50 | 55.33 | a | 71.34 | a | 77.71 | 82.27 | 84.03 | 82.23 | 75.40 | 68.42 | 57.72 | a | 54.72 | b | 68.51 | |||||||||
1970 | 51.81 | 58.44 | a | 55.90 | 67.37 | 76.87 | 78.87 | 80.47 | a | 81.68 | 77.43 | 64.19 | 62.63 | 56.58 | 67.69 | |||||||||||
1971 | 53.58 | 54.54 | 64.48 | 67.83 | 74.26 | 83.73 | 82.90 | 75.61 | 76.43 | 66.10 | 59.20 | 52.03 | 67.56 | |||||||||||||
1972 | 56.43 | a | 58.52 | 68.16 | 72.20 | 75.34 | b | 80.70 | 82.74 | 76.58 | 75.67 | 70.52 | 52.77 | 51.58 | 68.43 | |||||||||||
1973 | 48.77 | 50.54 | 56.77 | 62.23 | 72.90 | 82.20 | ----- | z | 81.68 | 79.67 | 75.32 | 66.40 | 57.61 | 66.74 | a | |||||||||||
1974 | 55.73 | a | 55.64 | 66.61 | 68.03 | 80.39 | 86.67 | 80.26 | 77.80 | a | 71.53 | 65.67 | a | 58.87 | 47.32 | 67.88 | ||||||||||
1975 | 49.65 | 52.29 | 60.97 | 64.47 | 72.71 | 84.77 | d | 78.42 | 79.74 | 75.03 | 72.74 | 62.63 | 56.23 | 67.47 | ||||||||||||
1976 | 55.57 | a | 61.38 | 61.94 | 68.20 | 72.06 | 81.93 | 78.26 | 79.53 | a | ----- | z | ----- | z | ----- | z | ----- | z | 69.86 | d | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.06 | 55.36 | 59.88 | 67.78 | 75.62 | 83.43 | 82.80 | 81.09 | 77.11 | 70.05 | 60.82 | 54.43 | 68.46 | |||||||||||||
S.D. | 4.05 | 3.56 | 4.12 | 3.21 | 2.12 | 2.39 | 2.73 | 2.75 | 2.97 | 3.04 | 4.17 | 3.13 | 1.16 | |||||||||||||
SKEW | -0.33 | -0.07 | -0.03 | -0.20 | -0.38 | -0.66 | -0.17 | 0.12 | 0.40 | -0.06 | -0.64 | -0.34 | -0.36 | |||||||||||||
MAX | 60.61 | 61.96 | 68.16 | 73.40 | 80.39 | 87.87 | 88.29 | 85.81 | 83.47 | 75.32 | 67.33 | 60.29 | 70.63 | |||||||||||||
MIN | 42.73 | 47.68 | 49.57 | 59.80 | 70.37 | 76.77 | 76.80 | 75.61 | 71.53 | 64.19 | 49.56 | 47.32 | 65.37 | |||||||||||||
YRS | 36 | 35 | 35 | 36 | 36 | 38 | 37 | 37 | 35 | 33 | 35 | 34 | 28 |