YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1895 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.52 | e | 82.37 | 71.95 | 57.07 | 48.87 | 69.76 | g | ||||
1896 | 53.87 | 55.74 | 62.08 | 63.70 | 74.35 | 88.40 | 88.00 | 88.60 | 83.00 | 71.02 | 59.63 | 54.29 | 70.22 | |||||||||||||
1897 | 51.19 | 51.36 | 54.26 | 68.17 | 77.52 | 82.57 | 89.66 | 89.24 | 83.42 | 68.13 | 60.37 | 48.79 | 68.72 | |||||||||||||
1898 | 47.18 | 58.75 | 57.03 | 71.70 | 73.35 | 84.73 | 92.23 | 89.77 | 84.20 | 71.47 | 57.47 | 48.81 | 69.72 | |||||||||||||
1899 | 50.34 | 52.93 | 59.92 | 68.72 | 71.21 | 84.67 | 90.98 | 87.52 | 86.53 | 68.92 | 60.88 | 52.98 | 69.63 | |||||||||||||
1900 | 56.08 | 56.43 | 65.60 | 63.02 | 77.55 | 86.10 | 91.05 | 86.19 | 78.92 | 71.29 | 62.87 | 53.73 | 70.73 | |||||||||||||
1901 | 53.13 | 56.16 | 59.89 | 65.62 | 74.95 | 82.73 | 92.92 | 89.89 | 82.42 | 73.23 | 63.92 | 52.23 | 70.59 | |||||||||||||
1902 | 52.44 | 56.34 | 57.40 | 69.77 | 75.23 | 86.45 | 88.61 | 89.53 | 83.55 | 73.92 | 57.87 | 51.82 | 70.24 | |||||||||||||
1903 | 51.82 | 48.88 | 59.74 | 66.32 | 74.84 | 85.37 | 89.92 | 90.74 | 81.70 | 71.05 | 62.33 | 53.35 | 69.67 | |||||||||||||
1904 | 48.45 | 58.91 | 62.87 | 67.97 | 77.02 | 86.33 | 88.39 | 87.98 | 80.52 | 70.85 | 62.23 | 52.73 | 70.35 | |||||||||||||
1905 | 55.13 | 56.32 | 60.05 | 64.42 | 70.84 | 83.60 | 89.60 | 90.02 | 84.13 | 71.61 | 58.50 | 50.13 | 69.53 | |||||||||||||
1906 | 51.16 | 58.14 | 60.79 | 65.32 | 73.47 | 84.03 | 91.42 | 85.71 | 81.70 | 71.66 | 58.60 | 54.31 | 69.69 | |||||||||||||
1907 | 51.74 | 59.18 | 59.76 | 68.67 | 72.53 | 80.82 | 89.42 | 87.71 | 82.88 | 70.68 | 59.90 | 52.69 | 69.66 | |||||||||||||
1908 | 53.37 | 54.05 | 61.02 | 67.57 | 71.48 | 81.77 | 88.56 | 87.89 | 81.70 | 66.74 | 61.37 | 53.13 | 69.05 | |||||||||||||
1909 | 55.45 | 53.52 | 56.81 | 67.02 | 73.03 | 84.73 | 88.68 | 86.77 | 81.00 | 71.13 | 59.25 | 48.10 | 68.79 | |||||||||||||
1910 | 51.23 | 54.11 | 65.66 | 70.07 | 79.29 | 85.12 | 89.55 | 89.65 | 86.20 | 72.29 | 60.27 | 54.58 | 71.50 | |||||||||||||
1911 | 55.19 | 52.93 | 63.56 | 67.30 | 74.06 | 83.88 | 86.06 | 87.69 | 83.32 | 69.05 | 57.53 | 46.61 | 68.93 | |||||||||||||
1912 | 52.98 | 56.17 | 58.52 | 63.12 | 73.79 | 86.08 | 85.40 | 86.24 | 78.90 | 67.94 | 59.80 | 48.89 | 68.15 | |||||||||||||
1913 | 47.19 | 53.07 | 56.73 | 67.22 | 73.71 | 81.92 | 86.31 | 86.71 | 81.73 | 69.61 | 61.57 | 50.69 | 68.04 | |||||||||||||
1914 | 54.89 | 55.12 | 63.65 | 68.42 | 75.63 | 84.53 | 88.87 | 89.23 | 84.52 | 71.18 | 63.90 | 50.27 | 70.85 | |||||||||||||
1915 | 50.03 | 53.82 | 58.61 | 66.38 | 70.73 | 83.33 | 87.26 | 89.08 | 79.92 | 73.81 | 59.25 | 51.53 | 68.65 | |||||||||||||
1916 | 50.77 | 59.53 | 63.98 | 68.23 | 73.95 | 83.93 | 89.05 | 86.95 | 80.88 | 66.11 | 55.80 | 47.11 | 68.86 | |||||||||||||
1917 | 48.98 | 55.27 | 56.19 | 64.18 | 68.97 | 84.40 | 90.00 | 87.15 | 83.18 | 72.71 | 60.90 | 54.55 | 68.87 | |||||||||||||
1918 | 49.58 | 55.27 | 62.34 | 67.48 | 72.16 | 88.58 | 88.29 | 84.56 | 82.45 | 71.82 | 57.28 | 49.58 | 69.12 | |||||||||||||
1919 | 50.60 | 51.21 | 57.50 | 69.28 | 76.90 | 85.40 | 88.11 | 88.52 | 81.48 | 66.71 | 56.98 | 54.21 | 68.91 | |||||||||||||
1920 | 53.31 | 57.76 | 58.47 | 64.58 | 75.87 | 84.45 | 90.77 | 86.47 | 80.33 | 67.00 | 58.65 | 49.53 | 68.93 | |||||||||||||
1921 | 51.97 | 57.62 | 64.71 | 66.08 | 73.61 | 84.78 | 89.19 | 87.11 | 82.55 | 73.82 | 60.88 | 56.08 | 70.70 | |||||||||||||
1922 | 48.58 | 54.43 | 56.94 | 63.23 | 76.18 | 86.23 | 90.61 | 89.39 | 85.03 | 71.65 | 54.98 | 55.02 | 69.36 | |||||||||||||
1923 | 55.44 | 55.12 | 58.90 | 66.57 | 77.66 | 80.78 | 89.27 | 87.23 | 80.22 | 67.29 | 59.12 | 52.05 | 69.14 | |||||||||||||
1924 | 50.34 | 58.83 | 56.58 | 65.10 | 78.73 | 87.48 | 90.24 | 89.47 | 85.53 | 71.16 | 62.77 | 50.63 | 70.57 | |||||||||||||
1925 | 51.97 | 60.66 | 64.81 | 70.83 | 81.21 | 86.25 | 92.69 | 87.21 | 80.43 | 68.52 | 57.82 | 53.45 | 71.32 | |||||||||||||
1926 | 49.35 | 58.16 | 64.03 | 68.58 | 75.73 | 87.02 | 89.63 | 88.90 | 83.40 | 73.48 | 61.63 | 51.42 | 70.95 | |||||||||||||
1927 | 56.23 | 58.73 | 59.11 | 67.30 | 76.06 | 83.68 | 91.26 | 87.87 | 82.57 | 71.50 | 63.23 | 50.92 | 70.71 | |||||||||||||
1928 | 53.19 | 55.09 | 64.10 | 67.67 | 79.44 | 85.58 | 91.81 | 88.37 | 85.27 | 72.55 | 60.18 | 51.42 | 71.22 | |||||||||||||
1929 | 50.10 | 53.02 | 60.35 | 66.22 | 78.03 | 86.47 | 92.00 | 89.65 | 84.02 | 74.73 | 57.92 | 56.35 | 70.74 | |||||||||||||
1930 | 52.00 | 60.27 | 60.63 | 72.18 | 71.68 | 86.78 | 91.27 | 89.68 | 82.28 | 70.35 | 60.22 | 52.16 | 70.79 | |||||||||||||
1931 | 52.92 | 57.84 | 62.74 | 72.35 | 80.48 | 86.98 | 95.13 | 89.31 | 85.93 | 72.84 | 57.20 | 49.73 | 71.95 | |||||||||||||
1932 | 47.02 | 56.76 | 61.92 | 69.25 | 77.23 | 84.73 | 91.85 | 92.13 | 87.03 | 71.55 | 62.92 | 49.26 | 70.97 | |||||||||||||
1933 | 48.81 | 49.61 | 61.89 | 64.67 | 72.55 | 87.62 | 94.98 | 92.39 | 86.85 | 76.69 | 62.73 | 54.63 | 71.12 | |||||||||||||
1934 | 54.52 | 60.84 | 69.98 | 74.80 | 83.23 | 83.72 | 94.08 | 90.03 | 84.83 | 75.47 | 61.47 | 55.95 | 74.08 | |||||||||||||
1935 | 53.82 | 57.89 | 57.58 | 69.48 | 74.10 | 89.18 | 91.97 | 88.48 | 84.55 | 72.56 | 57.20 | 54.29 | 70.93 | |||||||||||||
1936 | 52.87 | 56.33 | 64.79 | 73.12 | 81.69 | 90.32 | 93.15 | 91.13 | 83.53 | 73.13 | 61.82 | 53.18 | 72.92 | |||||||||||||
1937 | 43.13 | 54.70 | 59.90 | 67.65 | 78.53 | 85.30 | 91.79 | 92.21 | 86.92 | 74.89 | 62.33 | 56.90 | 71.19 | |||||||||||||
1938 | 55.00 | 56.43 | 59.37 | 69.00 | 76.26 | 85.78 | 90.29 | 89.90 | 86.82 | 71.65 | 55.98 | 55.89 | 71.03 | |||||||||||||
1939 | 52.48 | 48.54 | 62.37 | 71.23 | 78.76 | 85.92 | 92.24 | 90.13 | 82.47 | 70.73 | 64.27 | 57.58 | 71.39 | |||||||||||||
1940 | 55.65 | 56.76 | 64.84 | 69.97 | 81.50 | 88.90 | 91.47 | 90.97 | 85.13 | 73.52 | 58.90 | 56.76 | 72.86 | |||||||||||||
1941 | 54.85 | 58.54 | 59.81 | 62.92 | 76.47 | 82.83 | 89.94 | 87.15 | 80.65 | 68.16 | 62.12 | 54.11 | 69.79 | |||||||||||||
1942 | 54.34 | 52.80 | 59.06 | 66.32 | 75.15 | 84.97 | 92.73 | 88.84 | 85.00 | 72.29 | 63.45 | 55.92 | 70.90 | |||||||||||||
1943 | 53.50 | 59.45 | 63.90 | 71.80 | 78.95 | 84.37 | 91.97 | 88.31 | 85.57 | 72.84 | 61.82 | 53.73 | 72.18 | |||||||||||||
1944 | 51.77 | 52.78 | 57.94 | 64.80 | 75.58 | 81.23 | 89.89 | 90.97 | 83.98 | 74.87 | 58.02 | 54.00 | 69.65 | |||||||||||||
1945 | 51.94 | 56.27 | 57.02 | 66.42 | 76.19 | 82.53 | 90.90 | 89.89 | 85.03 | 74.92 | 59.30 | 51.27 | 70.14 | |||||||||||||
1946 | 51.35 | 54.11 | 62.03 | 73.57 | 76.90 | 87.75 | 90.40 | 89.79 | 84.67 | 67.61 | 55.95 | 55.76 | 70.82 | |||||||||||||
1947 | 50.50 | 60.09 | 63.61 | 69.18 | 79.69 | 84.62 | 93.03 | 88.45 | 87.38 | 73.92 | 56.60 | 51.05 | 71.51 | |||||||||||||
1948 | 53.56 | 53.86 | 56.89 | 69.82 | 77.03 | 85.03 | 91.11 | 91.35 | 86.13 | 74.63 | 56.95 | 52.03 | 70.70 | |||||||||||||
1949 | 44.66 | 52.82 | 60.47 | 71.70 | 76.73 | 86.33 | 91.02 | 88.65 | 87.02 | 70.02 | 66.13 | 52.90 | 70.70 | |||||||||||||
1950 | 51.23 | 60.02 | 63.26 | 72.85 | 75.87 | 84.97 | 89.40 | 89.87 | 81.87 | 78.52 | 65.22 | 58.89 | 72.66 | |||||||||||||
1951 | 52.82 | 56.88 | 61.42 | 68.12 | 77.47 | 83.97 | 92.65 | 87.84 | 84.82 | 73.29 | 60.12 | 52.56 | 71.00 | |||||||||||||
1952 | 51.95 | 55.10 | 55.82 | 67.87 | 80.68 | 85.58 | 90.00 | 91.06 | 86.88 | 78.53 | 57.92 | 52.63 | 71.17 | |||||||||||||
1953 | 56.55 | 55.20 | 63.19 | 67.88 | 71.81 | 86.38 | 91.47 | 90.42 | 85.97 | 73.50 | 63.48 | 51.77 | 71.47 | |||||||||||||
1954 | 54.31 | 62.96 | 60.34 | 73.93 | 79.76 | 85.05 | 91.44 | 88.37 | 86.60 | 75.35 | 65.27 | 54.56 | 73.16 | |||||||||||||
1955 | 49.05 | 51.91 | 62.00 | 67.12 | 75.85 | 84.58 | 87.52 | 87.40 | 85.07 | 77.50 | 60.65 | 57.48 | 70.51 | |||||||||||||
1956 | 57.73 | 52.21 | 63.84 | 67.68 | 79.71 | 89.35 | 90.71 | 88.15 | 87.53 | 72.35 | 59.87 | 54.86 | c | 72.00 | ||||||||||||
1957 | 54.42 | 62.20 | 62.50 | 67.27 | 74.08 | 88.53 | 92.76 | 88.81 | 84.22 | 70.45 | 56.60 | 55.56 | 71.45 | |||||||||||||
1958 | 53.68 | 58.71 | 57.97 | 68.12 | 83.21 | 88.32 | 93.10 | 91.23 | 83.65 | d | 76.63 | d | 62.36 | a | 59.22 | b | 73.02 | |||||||||
1959 | 56.79 | c | 55.40 | c | 64.03 | 74.42 | 76.50 | 90.72 | 94.59 | b | 88.90 | 84.62 | a | 74.73 | a | 62.62 | 55.03 | a | 73.20 | |||||||
1960 | 49.56 | 52.47 | 65.71 | 71.81 | c | 77.61 | 90.71 | b | 93.40 | 90.98 | a | 87.20 | 71.98 | a | 62.75 | 53.60 | 72.32 | |||||||||
1961 | 56.87 | a | 59.18 | 62.18 | 70.77 | 77.52 | 91.07 | c | 92.71 | 89.58 | 81.88 | 72.50 | 58.55 | a | 53.42 | a | 72.19 | |||||||||
1962 | 52.17 | a | 57.45 | 57.32 | 74.08 | 75.23 | 85.03 | 91.90 | 92.97 | 85.93 | a | 74.56 | 65.00 | 57.18 | 72.40 | |||||||||||
1963 | 50.55 | 61.93 | 61.94 | 66.27 | 80.65 | a | 82.92 | 93.34 | 88.26 | 87.18 | 77.05 | 63.10 | 54.65 | 72.32 | ||||||||||||
1964 | 49.87 | 52.59 | 58.45 | 67.42 | 76.37 | 84.85 | 92.68 | a | 87.92 | 82.78 | 77.52 | 57.70 | 54.55 | 70.22 | ||||||||||||
1965 | 54.92 | 54.95 | 58.90 | a | 66.68 | 74.27 | 80.83 | 91.42 | 90.53 | 81.92 | 76.10 | a | 64.43 | 54.40 | 70.78 | |||||||||||
1966 | 50.61 | 52.12 | 63.29 | 71.55 | 81.48 | 87.52 | 92.58 | 91.61 | 85.00 | 73.21 | 63.65 | 54.95 | 72.30 | |||||||||||||
1967 | 53.15 | 58.62 | 63.73 | 63.33 | 75.90 | 83.20 | 91.81 | 91.35 | 85.47 | 76.19 | 66.32 | 49.74 | 71.57 | |||||||||||||
1968 | 54.35 | 61.57 | 62.37 | 67.88 | i | 78.07 | c | 87.14 | a | 90.53 | b | 87.79 | q | ----- | z | ----- | z | ----- | z | ----- | z | 72.34 | f | |||
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.94 | l | 72.68 | 58.73 | 52.90 | 61.44 | i | |||
1973 | 52.35 | 58.41 | 57.77 | 69.07 | 83.04 | c | 88.88 | 93.45 | 92.97 | a | 85.40 | 75.90 | 61.83 | 56.23 | 72.94 | |||||||||||
1974 | 54.32 | 56.98 | 65.44 | 71.09 | b | 80.39 | 92.30 | 92.02 | 90.69 | b | 86.93 | 76.42 | 62.70 | b | 51.92 | 73.43 | ||||||||||
1975 | 54.26 | 57.15 | a | 61.50 | 64.78 | 77.06 | 86.73 | 93.39 | 92.57 | b | 87.24 | a | 74.39 | 63.05 | a | 56.18 | 72.36 | |||||||||
1976 | 56.63 | 61.97 | 62.89 | 69.67 | 81.10 | 88.87 | 92.89 | 91.95 | 84.48 | 73.40 | 64.82 | 56.60 | 73.77 | |||||||||||||
1977 | 55.23 | 62.02 | 61.90 | 73.87 | 76.66 | 92.05 | 95.24 | 93.81 | 87.72 | 79.56 | 66.30 | 60.45 | 75.40 | |||||||||||||
1978 | 56.63 | 59.11 | 66.79 | 70.12 | 79.74 | 91.88 | 94.73 | 91.72 | a | 86.75 | 79.97 | a | 62.40 | 52.34 | 74.35 | |||||||||||
1979 | 50.79 | 57.84 | 62.29 | 71.50 | 79.18 | 89.82 | 94.15 | 89.95 | 90.87 | 78.08 | 60.88 | 58.31 | 73.64 | |||||||||||||
1980 | 58.34 | 62.23 | a | 62.37 | 71.25 | 76.71 | 90.28 | 96.11 | 92.58 | 88.20 | 76.84 | 65.35 | 62.53 | 75.23 | ||||||||||||
1981 | 60.61 | 62.34 | 64.10 | 76.27 | 80.91 | b | 93.08 | 95.02 | 95.05 | 88.62 | a | 74.08 | 66.38 | 59.44 | 76.32 | |||||||||||
1982 | 54.83 | a | 60.70 | 62.79 | 72.33 | 79.50 | 87.14 | a | 92.66 | 93.19 | 87.12 | ----- | z | 60.50 | t | 54.67 | d | 74.49 | b | |||||||
1983 | 56.46 | c | 59.16 | 62.73 | 67.16 | b | 80.74 | 88.21 | a | 94.97 | 91.16 | 89.60 | 76.52 | a | 63.53 | 57.39 | 73.97 | |||||||||
1984 | 57.04 | d | 59.85 | c | 67.91 | b | 71.62 | a | 83.96 | h | 89.58 | f | 91.63 | 91.02 | b | 88.08 | 71.39 | 62.37 | 54.20 | f | 73.43 | c | ||||
1985 | 54.38 | a | 57.66 | ----- | z | 76.35 | 83.69 | 91.93 | b | 94.71 | 94.00 | a | 82.72 | 75.85 | 61.80 | 56.74 | 75.44 | a | ||||||||
1986 | 62.07 | a | 61.90 | d | 69.63 | 74.47 | a | 82.68 | 92.15 | 91.71 | 94.37 | a | 83.38 | 74.84 | 64.98 | a | 57.48 | 75.80 | ||||||||
1987 | 55.87 | 59.91 | 62.87 | 77.17 | 81.35 | a | 91.65 | 92.73 | 91.24 | 85.84 | a | 80.44 | 63.19 | a | 53.31 | 74.63 | ||||||||||
1988 | 55.66 | 62.59 | a | 66.12 | a | 72.72 | 80.97 | 91.73 | 94.66 | 92.69 | 86.47 | 81.56 | 63.64 | a | 55.65 | 75.37 | ||||||||||
1989 | 54.81 | 61.50 | 70.17 | a | 79.62 | 82.63 | 90.25 | 95.53 | 92.21 | 88.58 | 76.29 | c | 66.03 | 56.69 | 76.19 | |||||||||||
1990 | 55.69 | 57.11 | 67.23 | 75.38 | 80.33 | a | 92.70 | 92.72 | b | 89.92 | 87.02 | 78.18 | 65.86 | b | 53.60 | a | 74.64 | |||||||||
1991 | 55.95 | 65.61 | 59.85 | a | 71.47 | 78.04 | h | 86.75 | 93.31 | 93.69 | 87.87 | 79.77 | 63.83 | 57.53 | a | 74.15 | a | |||||||||
1992 | 56.00 | 61.70 | a | 63.90 | a | 76.63 | 82.56 | 89.12 | 92.60 | a | 91.80 | a | 89.12 | 79.11 | 61.27 | 53.34 | 74.76 | |||||||||
1993 | 57.91 | b | 59.27 | 65.95 | 73.79 | a | 83.37 | 89.84 | a | 92.63 | 91.90 | 87.82 | 76.60 | 61.97 | 56.34 | 74.78 | ||||||||||
1994 | 57.39 | 57.62 | b | 67.21 | 74.00 | 80.00 | 93.58 | 94.79 | 96.06 | 88.68 | h | 74.39 | i | 58.66 | e | 56.92 | e | 73.62 | b | |||||||
1995 | 55.12 | e | ----- | z | ----- | z | 69.57 | g | 77.42 | m | 88.37 | g | 94.48 | ----- | z | ----- | z | 78.22 | b | 69.59 | c | 58.09 | b | 71.10 | g | |
1996 | 57.45 | b | 64.12 | d | 65.52 | a | 74.67 | c | 84.48 | d | 92.48 | 96.36 | c | 94.40 | e | ----- | z | ----- | z | 65.02 | d | 56.83 | a | 75.13 | b | |
1997 | 56.37 | d | 58.62 | c | 69.91 | b | 71.15 | c | 86.32 | 89.27 | b | 93.43 | d | 93.46 | c | 90.29 | d | 74.53 | b | 64.52 | 52.88 | a | 75.06 | |||
1998 | 57.30 | c | 54.48 | d | 61.54 | c | 67.19 | c | 77.85 | d | 86.38 | b | ----- | z | 95.00 | b | 87.91 | b | 74.58 | a | ----- | z | ----- | z | 73.58 | c |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.21 | 57.05 | 61.81 | 69.35 | 77.41 | 86.65 | 91.58 | 89.96 | 84.67 | 73.39 | 61.25 | 53.85 | 71.49 | |||||||||||||
S.D. | 3.21 | 3.50 | 3.43 | 3.64 | 3.56 | 3.13 | 2.30 | 2.32 | 2.63 | 3.39 | 3.02 | 3.03 | 2.02 | |||||||||||||
SKEW | -0.31 | -0.09 | 0.25 | 0.37 | 0.06 | 0.33 | -0.28 | 0.32 | -0.06 | 0.07 | 0.05 | 0.01 | 0.57 | |||||||||||||
MAX | 62.07 | 65.61 | 70.17 | 79.62 | 86.32 | 93.58 | 96.36 | 96.06 | 90.87 | 81.56 | 69.59 | 62.53 | 76.32 | |||||||||||||
MIN | 43.13 | 48.54 | 54.26 | 62.92 | 68.97 | 80.78 | 85.40 | 84.56 | 78.90 | 66.11 | 54.98 | 46.61 | 68.04 | |||||||||||||
YRS | 99 | 98 | 97 | 97 | 96 | 97 | 98 | 98 | 96 | 97 | 98 | 98 | 90 |