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 | ----- | 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 | 87.73 | a | 82.16 | 80.31 | a | 68.10 | 63.47 | 57.58 | 73.22 | f | ||||
1943 | 53.16 | 55.68 | 57.13 | 66.24 | a | 74.52 | 87.13 | 84.19 | 77.77 | a | 78.60 | 67.32 | 62.37 | 51.87 | 68.00 | |||||||||||
1944 | 52.87 | 61.72 | d | 56.74 | 63.73 | 74.81 | 83.07 | a | 91.06 | 89.87 | 79.67 | 69.35 | 52.77 | ----- | z | 70.52 | a | |||||||||
1945 | ----- | z | 66.36 | 59.84 | 72.43 | 72.97 | 79.37 | 84.06 | 81.52 | 79.67 | 71.03 | 67.13 | 49.90 | 71.30 | a | |||||||||||
1946 | 47.97 | 53.00 | a | 70.16 | 71.07 | 71.84 | 85.57 | 82.45 | 80.97 | 77.80 | 62.84 | 53.40 | 59.36 | q | 68.82 | a | ||||||||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | 76.50 | a | 80.93 | 86.90 | 79.13 | 81.53 | 70.06 | 50.87 | 43.50 | q | 75.13 | e | ||||||
1948 | ----- | z | 47.77 | c | 50.92 | s | 66.72 | a | 74.81 | 81.80 | 86.71 | 84.13 | 83.10 | 71.61 | 59.40 | 52.30 | a | 70.84 | b | |||||||
1949 | 36.39 | c | ----- | z | ----- | z | ----- | z | 71.89 | l | 79.40 | 83.23 | 84.39 | 80.70 | 63.87 | 65.90 | 47.71 | 67.70 | d | |||||||
1950 | 45.58 | 54.79 | 58.48 | ----- | z | 74.75 | g | 82.47 | 79.77 | 84.03 | a | 79.53 | 77.50 | a | 65.07 | 59.17 | a | 68.64 | b | |||||||
1951 | 49.81 | 53.00 | 55.71 | 61.80 | 70.48 | 80.40 | 87.06 | 80.61 | 81.27 | h | 68.87 | 56.10 | 48.35 | 64.75 | a | |||||||||||
1952 | 47.19 | 49.21 | 45.47 | a | 61.37 | 75.74 | 82.70 | 85.16 | 82.52 | 81.93 | 78.32 | 54.07 | 48.68 | 66.03 | ||||||||||||
1953 | 55.45 | 54.07 | 57.55 | 62.59 | a | 65.55 | 82.80 | 82.87 | 80.55 | b | 82.67 | 70.03 | 61.47 | 49.19 | 67.07 | |||||||||||
1954 | 50.87 | 59.57 | 52.16 | 70.73 | 74.68 | 80.13 | 84.00 | 79.84 | 78.73 | 73.64 | f | 63.93 | 52.03 | 67.88 | a | |||||||||||
1955 | 41.71 | 46.57 | 56.45 | 61.28 | a | 70.45 | 79.23 | 80.35 | 79.06 | 80.40 | 73.19 | 57.21 | b | 53.00 | 64.91 | |||||||||||
1956 | 53.10 | 46.55 | 61.90 | 61.86 | a | 74.46 | g | 84.30 | 83.19 | 81.61 | 84.40 | 70.76 | b | 59.83 | 51.58 | 67.19 | a | |||||||||
1957 | 44.13 | 55.79 | 55.07 | a | 60.07 | 64.00 | 81.62 | a | 83.87 | 79.16 | 80.47 | 61.29 | 51.10 | 53.39 | 64.16 | |||||||||||
1958 | 48.87 | 52.32 | 45.10 | 60.33 | 76.10 | 81.63 | 86.39 | 81.00 | 75.33 | 68.55 | 57.83 | 57.81 | 65.94 | |||||||||||||
1959 | 51.39 | 46.64 | 59.13 | a | 66.87 | 68.65 | 83.63 | 87.00 | 78.17 | a | 75.77 | 70.60 | a | 58.63 | 48.90 | 66.28 | ||||||||||
1960 | 43.06 | 43.72 | 60.68 | 65.17 | 72.39 | 85.07 | 87.35 | 83.81 | 79.43 | 63.71 | 56.97 | 48.06 | 65.79 | |||||||||||||
1961 | 52.55 | 53.54 | 53.90 | 64.63 | 71.55 | 85.70 | 86.03 | 80.42 | 73.77 | 67.00 | 52.30 | 46.27 | a | 65.64 | ||||||||||||
1962 | 46.32 | 48.68 | 48.58 | 69.10 | 68.43 | a | 79.57 | 83.90 | 85.00 | 77.27 | 68.10 | a | 59.80 | 51.52 | 65.52 | |||||||||||
1963 | 45.35 | 56.70 | a | 53.53 | a | 58.43 | 73.42 | 76.67 | 87.26 | 78.00 | a | 77.30 | 69.32 | 55.50 | 51.87 | 65.28 | ||||||||||
1964 | 44.94 | 47.79 | a | 50.00 | a | 58.07 | b | 69.45 | 78.47 | 83.87 | 78.03 | 75.37 | 74.61 | 53.70 | 48.87 | 63.60 | ||||||||||
1965 | 52.16 | 52.54 | 54.10 | 58.63 | 66.87 | 74.17 | a | 82.00 | 82.77 | 72.59 | a | 74.52 | 58.30 | 48.17 | h | 66.24 | a | |||||||||
1966 | 45.26 | 46.04 | a | 60.58 | 67.10 | 75.84 | 81.73 | 85.19 | 83.35 | 77.60 | 69.00 | c | 59.40 | 48.23 | 66.61 | |||||||||||
1967 | 50.71 | 56.14 | 58.58 | 55.66 | a | 70.71 | 76.17 | 82.94 | ----- | z | 75.97 | 72.97 | 60.37 | 46.00 | q | 66.02 | b | |||||||||
1968 | 47.35 | 55.52 | d | 55.23 | 59.37 | 70.81 | 81.93 | 81.45 | 76.03 | 78.60 | 69.43 | a | 55.34 | a | 47.97 | 64.92 | ||||||||||
1969 | 48.84 | 45.79 | 52.00 | 64.70 | 73.06 | 78.93 | 83.06 | 83.68 | 77.50 | 63.42 | 53.90 | 51.06 | 64.66 | |||||||||||||
1970 | 48.77 | 54.18 | 52.55 | 57.60 | 66.67 | v | ----- | z | 87.07 | a | 81.45 | 75.47 | 65.63 | a | 59.34 | a | 48.84 | 63.09 | b | |||||||
1971 | 51.84 | 52.59 | a | 60.33 | a | 63.60 | 66.57 | a | 81.40 | 88.93 | a | 77.90 | 76.63 | 61.70 | a | 56.40 | 40.23 | i | 67.08 | a | ||||||
1972 | 51.62 | b | 57.70 | b | 69.52 | d | 66.27 | 74.03 | a | 79.71 | b | 87.14 | b | 81.06 | 76.44 | c | 62.48 | ----- | z | 41.67 | y | 70.60 | b | |||
1973 | 44.94 | 47.11 | a | 49.83 | a | 58.93 | 73.20 | a | 82.03 | 85.75 | c | 82.59 | b | 80.66 | a | 72.10 | a | 55.07 | c | 51.63 | a | 65.32 | ||||
1974 | 45.32 | 53.00 | c | 57.37 | d | 65.00 | d | 74.85 | d | 88.52 | a | ----- | z | 85.53 | n | 76.87 | 66.52 | 56.07 | 45.48 | 62.90 | b | |||||
1975 | 49.48 | 49.43 | 50.71 | 53.83 | 70.06 | ----- | z | ----- | z | 83.53 | n | 78.53 | 69.03 | 57.93 | 51.81 | e | 58.98 | c | ||||||||
1976 | 51.77 | 52.14 | 53.26 | 60.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.40 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 48.35 | 52.36 | 55.86 | 63.02 | 71.80 | 81.49 | 84.94 | 81.31 | 78.50 | 68.87 | 57.91 | 50.85 | 65.61 | |||||||||||||
S.D. | 4.11 | 5.09 | 5.70 | 4.56 | 3.36 | 3.13 | 2.54 | 2.81 | 2.71 | 4.28 | 4.23 | 3.35 | 1.09 | |||||||||||||
SKEW | -0.70 | 0.53 | 0.48 | 0.17 | -0.60 | 0.01 | 0.09 | 0.65 | 0.04 | 0.13 | 0.37 | 0.89 | 0.29 | |||||||||||||
MAX | 55.45 | 66.36 | 70.16 | 72.43 | 76.50 | 88.52 | 91.06 | 89.87 | 84.40 | 78.32 | 67.13 | 59.17 | 68.00 | |||||||||||||
MIN | 36.39 | 43.72 | 45.10 | 53.83 | 64.00 | 74.17 | 79.77 | 76.03 | 72.59 | 61.29 | 50.87 | 45.48 | 63.60 | |||||||||||||
YRS | 31 | 32 | 31 | 31 | 29 | 31 | 32 | 31 | 33 | 33 | 33 | 27 | 16 |