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 | 44.71 | 50.79 | 56.58 | ----- | z | ----- | z | 82.47 | 93.35 | 87.87 | 76.17 | 70.90 | 62.17 | 47.39 | 67.24 | b | ||||||||||
1914 | 57.42 | 58.07 | 63.42 | 75.83 | 83.42 | 90.13 | 87.13 | 88.74 | 83.57 | 70.87 | 61.00 | 49.03 | 72.39 | |||||||||||||
1915 | 49.48 | 54.46 | 58.42 | 71.70 | 82.16 | 95.47 | 92.74 | 88.00 | a | 80.77 | 73.90 | 68.40 | 56.00 | a | 72.63 | |||||||||||
1916 | 58.55 | 64.79 | 74.13 | 74.50 | 84.94 | 97.30 | 92.77 | 89.39 | 84.20 | 72.13 | 62.47 | 56.61 | 75.98 | |||||||||||||
1917 | 54.35 | 58.32 | 63.10 | 76.33 | 75.47 | a | 94.10 | 93.29 | 91.84 | 83.27 | 76.58 | 70.70 | 64.65 | 75.17 | ||||||||||||
1918 | 49.83 | a | 62.68 | 68.97 | 72.47 | 80.55 | 93.17 | 92.94 | 89.94 | 86.43 | 72.71 | 60.40 | 50.13 | 73.35 | ||||||||||||
1919 | 53.35 | 52.64 | 62.87 | 77.40 | 87.48 | 89.90 | 89.52 | 95.39 | 84.07 | 74.30 | a | 61.37 | 58.45 | 73.90 | ||||||||||||
1920 | 53.48 | 59.83 | 59.32 | 69.40 | 85.32 | 88.57 | 93.35 | 86.35 | 86.38 | a | 73.65 | 60.67 | 55.61 | 72.66 | ||||||||||||
1921 | 57.32 | 61.93 | 68.94 | 71.13 | 84.29 | 91.53 | 89.03 | 90.71 | 87.40 | 76.29 | 61.83 | 57.55 | 74.83 | |||||||||||||
1922 | 52.10 | 55.32 | 66.71 | 73.00 | 84.58 | 94.13 | 94.45 | 93.74 | 87.63 | 75.10 | 62.00 | 58.90 | 74.81 | |||||||||||||
1923 | 59.87 | 57.00 | 62.42 | 75.03 | 86.19 | 93.90 | 93.77 | 88.71 | 84.57 | 75.48 | 60.93 | a | 50.00 | 73.99 | ||||||||||||
1924 | 54.45 | 63.00 | 63.77 | 74.07 | 85.06 | 99.50 | 93.84 | 95.71 | 88.13 | 79.55 | 69.30 | 55.58 | 76.83 | |||||||||||||
1925 | 57.35 | 65.11 | 71.32 | 80.50 | 85.55 | 93.13 | 94.94 | 88.77 | 87.67 | 75.00 | 64.33 | 53.13 | 76.40 | |||||||||||||
1926 | 49.65 | 64.46 | 66.45 | 71.43 | 81.55 | 93.63 | 91.52 | 93.13 | 87.60 | 75.65 | 64.37 | 54.42 | 74.49 | |||||||||||||
1927 | 62.10 | 64.57 | 68.06 | 78.13 | 89.23 | 93.13 | 95.71 | 91.07 | a | 86.10 | 79.29 | 72.90 | 52.77 | a | 77.75 | |||||||||||
1928 | 60.10 | 58.66 | 71.61 | 75.30 | 84.77 | a | 94.87 | 95.42 | 88.97 | 87.80 | 79.90 | 62.37 | 56.68 | 76.37 | ||||||||||||
1929 | 58.26 | 58.07 | 66.77 | a | 78.30 | 84.68 | 96.83 | 93.48 | 89.97 | 89.18 | b | 76.61 | 60.23 | 59.68 | 76.01 | |||||||||||
1930 | 54.65 | 67.57 | 65.48 | 81.83 | 83.97 | 95.03 | 92.84 | 93.06 | 89.60 | 79.32 | 61.67 | 53.52 | 76.55 | |||||||||||||
1931 | 54.94 | 58.75 | 67.03 | 74.30 | 85.48 | 96.80 | 94.35 | 90.74 | 91.47 | 81.68 | 65.87 | 55.16 | 76.38 | |||||||||||||
1932 | 52.60 | a | 63.24 | 64.58 | 77.17 | 85.16 | 86.60 | y | ----- | z | 94.42 | 85.33 | 74.23 | 66.90 | 53.81 | 71.74 | b | |||||||||
1933 | 56.32 | 58.14 | 72.58 | 73.80 | 84.71 | c | 92.07 | 93.81 | 92.58 | 90.77 | 79.87 | 69.27 | 66.13 | a | 77.50 | |||||||||||
1934 | 63.84 | 67.43 | 73.79 | b | 80.60 | 89.68 | 96.13 | 97.42 | 95.23 | 89.37 | 83.61 | 68.47 | 61.71 | 80.61 | ||||||||||||
1935 | 60.58 | 60.64 | 71.77 | 75.14 | i | 75.60 | p | 88.40 | 92.48 | 88.42 | 80.90 | 77.68 | 63.40 | 53.48 | 73.78 | b | ||||||||||
1936 | 53.00 | 58.14 | 68.90 | 75.40 | 83.03 | 92.53 | 90.77 | 90.84 | 84.20 | 73.93 | a | 60.87 | 54.84 | 73.87 | ||||||||||||
1937 | 52.32 | 58.04 | 63.55 | 76.34 | a | 85.74 | 92.43 | 93.90 | 93.00 | 86.50 | 76.68 | 65.80 | 56.90 | 75.10 | ||||||||||||
1938 | 55.13 | 62.14 | 65.48 | 76.07 | 81.74 | 89.60 | 88.97 | 91.65 | 82.80 | 78.32 | 61.73 | 57.55 | 74.27 | |||||||||||||
1939 | 53.19 | 53.36 | 67.68 | 74.87 | 85.19 | 93.73 | 91.71 | 87.68 | 84.80 | 72.45 | 60.67 | 59.81 | 73.76 | |||||||||||||
1940 | 50.68 | 58.45 | 67.26 | 76.53 | 85.23 | 89.20 | 92.39 | 90.00 | a | 87.73 | 76.71 | 59.90 | 60.00 | 74.51 | ||||||||||||
1941 | 56.03 | 60.39 | 61.71 | 69.10 | 81.74 | 88.03 | 92.45 | 88.55 | 82.97 | 71.74 | 62.37 | 55.90 | 72.58 | |||||||||||||
1942 | 54.55 | 58.67 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.55 | k | |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.23 | 65.50 | b | 54.19 | 65.97 | i | ||
1944 | 55.46 | c | 61.46 | a | 67.74 | 73.28 | a | 84.39 | 96.04 | b | 96.55 | b | 93.58 | 85.07 | 78.87 | 62.57 | 57.29 | 76.02 | ||||||||
1945 | 57.23 | 65.64 | 68.42 | 75.45 | a | 88.45 | 93.77 | 94.48 | 95.10 | 91.93 | a | 76.52 | 73.30 | 56.32 | 78.05 | |||||||||||
1946 | 50.71 | 63.79 | 71.48 | 82.47 | 85.00 | 97.80 | 93.97 | a | 93.58 | 88.33 | 80.43 | c | 61.67 | 60.17 | a | 77.45 | ||||||||||
1947 | 51.97 | a | 63.11 | 69.03 | 76.90 | 87.84 | 92.37 | 96.56 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.54 | f | |||||
1948 | 53.16 | 59.69 | 63.23 | 75.64 | s | 86.81 | 93.80 | 94.29 | j | 96.13 | 87.03 | 72.16 | 59.07 | 56.61 | 72.77 | b | ||||||||||
1949 | 46.42 | 58.96 | 70.35 | 75.73 | 87.55 | 95.27 | 95.23 | 93.42 | 84.61 | g | 74.35 | 71.44 | l | 58.42 | e | 75.57 | b | |||||||||
1950 | 61.87 | 66.79 | 71.19 | 81.17 | a | 88.57 | h | 97.03 | 93.23 | 96.10 | 87.30 | 84.97 | 70.50 | 65.55 | 79.61 | a | ||||||||||
1951 | 58.19 | 64.95 | i | 67.15 | e | 76.40 | 86.39 | 96.13 | 99.81 | 95.81 | 92.80 | 82.56 | f | 65.53 | 59.74 | d | 79.80 | b | ||||||||
1952 | 63.52 | 60.14 | 62.35 | 75.97 | 86.07 | a | 96.67 | 96.16 | 97.48 | 89.37 | 73.87 | 60.37 | 53.70 | d | 76.31 | |||||||||||
1953 | 61.29 | 57.14 | ----- | z | 73.44 | u | 81.74 | 98.23 | 96.57 | a | 95.90 | a | 92.70 | 78.77 | 67.10 | 53.37 | d | 78.28 | b | |||||||
1954 | 60.77 | 68.04 | 66.50 | a | 82.78 | c | 86.00 | 94.69 | a | 96.77 | 93.77 | 91.79 | a | 80.29 | 69.93 | a | 60.19 | 79.29 | ||||||||
1955 | 52.07 | a | 61.71 | g | 69.42 | 77.93 | 85.57 | a | 94.00 | 91.42 | 91.65 | 92.67 | 79.16 | 68.97 | 63.06 | 78.72 | a | |||||||||
1956 | 63.71 | 60.03 | 72.61 | ----- | z | 92.31 | e | 98.57 | 94.71 | 93.90 | 92.83 | 80.77 | 63.87 | 57.03 | 79.12 | a | ||||||||||
1957 | 58.00 | g | 69.00 | 63.29 | g | 76.23 | ----- | z | 95.50 | 97.00 | a | 92.17 | b | 86.67 | 71.03 | a | 59.13 | 57.90 | 78.29 | c | ||||||
1958 | 51.71 | 62.04 | 58.90 | 73.00 | 87.06 | 97.57 | 98.00 | 94.39 | 85.40 | 72.42 | 65.13 | 61.19 | 75.57 | |||||||||||||
1959 | 59.81 | 60.18 | 67.26 | 77.10 | 86.35 | 97.00 | 96.24 | j | 92.10 | 91.10 | 79.52 | 63.27 | 57.68 | 75.58 | a | |||||||||||
1960 | 51.84 | 56.28 | 71.29 | 79.30 | 85.58 | 97.10 | 91.71 | 95.26 | 90.17 | 76.45 | 68.10 | 50.52 | 76.13 | |||||||||||||
1961 | 54.45 | 61.46 | 68.48 | 78.17 | 89.19 | 95.57 | 95.84 | 91.26 | 84.23 | 79.00 | 60.47 | 56.68 | 76.23 | |||||||||||||
1962 | 52.23 | 66.29 | 62.29 | 79.73 | 87.97 | 94.60 | 92.03 | 96.65 | 84.57 | 77.77 | 67.50 | 57.23 | 76.57 | |||||||||||||
1963 | 54.90 | a | 63.46 | 70.00 | ----- | z | 91.29 | 96.24 | a | 98.06 | 91.19 | 88.10 | 81.68 | 67.77 | 58.65 | 78.30 | a | |||||||||
1964 | 54.39 | 54.17 | 65.00 | 76.50 | 88.55 | 96.53 | 96.48 | 94.68 | 87.07 | 80.55 | 66.90 | 56.00 | 76.40 | |||||||||||||
1965 | 60.23 | 59.18 | 64.19 | 79.77 | 87.13 | 93.93 | 97.35 | 92.10 | 84.97 | 80.00 | 71.57 | 57.26 | 77.31 | |||||||||||||
1966 | 51.65 | 55.50 | 70.97 | 78.87 | 89.52 | 94.10 | 96.23 | 91.84 | 88.07 | 80.03 | 71.47 | 58.35 | 77.22 | |||||||||||||
1967 | 59.17 | a | 62.93 | 75.87 | 81.67 | 86.84 | 93.87 | 94.58 | 90.52 | 87.17 | 79.84 | 66.83 | 50.74 | 77.50 | ||||||||||||
1968 | 54.87 | 61.86 | 64.87 | 74.47 | 87.16 | 97.70 | 91.97 | 88.71 | 90.00 | 82.84 | 63.63 | 56.19 | 76.19 | |||||||||||||
1969 | 62.42 | 61.46 | 64.10 | 81.27 | 88.16 | 95.77 | 96.23 | 95.23 | 84.30 | 74.55 | 62.57 | 57.61 | 76.97 | |||||||||||||
1970 | 57.03 | 61.64 | 62.61 | 74.37 | 86.48 | 91.97 | 95.16 | 92.90 | 86.60 | 72.10 | a | 66.07 | 60.77 | 75.64 | ||||||||||||
1971 | 60.13 | a | 60.86 | 70.94 | 75.30 | 84.23 | 94.90 | 95.32 | 88.03 | 87.13 | 74.48 | 64.33 | 55.29 | 75.91 | ||||||||||||
1972 | 58.03 | 63.97 | 76.03 | 81.50 | 86.94 | 93.47 | 95.03 | 89.55 | 81.77 | ----- | z | 61.91 | h | 54.75 | o | 80.70 | c | |||||||||
1973 | 52.68 | 56.52 | a | 62.58 | 71.83 | 84.94 | 94.23 | 93.16 | 92.65 | 90.33 | 82.48 | 71.33 | 60.60 | a | 76.11 | |||||||||||
1974 | 59.55 | 62.36 | 75.74 | 79.03 | 90.35 | 97.73 | 91.07 | a | 88.87 | a | 84.39 | b | 74.90 | 64.39 | b | 54.23 | 76.88 | |||||||||
1975 | 55.74 | 59.82 | 67.55 | 73.73 | 84.41 | b | 96.83 | 92.58 | 94.77 | 85.40 | 81.23 | 71.50 | d | 58.58 | 76.85 | |||||||||||
1976 | 58.47 | a | 69.18 | a | 71.69 | b | 79.76 | a | 83.63 | a | 95.20 | 88.90 | a | 92.00 | 85.07 | 72.65 | 60.63 | 57.90 | a | 76.26 | ||||||
1977 | 56.47 | a | 63.00 | a | 66.81 | 77.37 | 85.42 | 97.33 | 96.21 | c | 96.58 | 92.07 | a | 80.41 | b | 70.27 | 63.28 | b | 78.77 | |||||||
1978 | 58.28 | b | 59.64 | 72.10 | 81.64 | e | 86.97 | b | 97.77 | 97.84 | ----- | z | 83.14 | a | 78.00 | 63.77 | ----- | z | 77.91 | b | ||||||
1979 | 51.65 | 61.61 | 68.10 | ----- | z | ----- | z | 93.00 | 96.26 | 88.32 | 85.57 | 83.26 | 62.80 | 58.52 | 74.91 | b | ||||||||||
1980 | 59.94 | 63.28 | 67.52 | 75.13 | 83.16 | 100.40 | 98.32 | 90.58 | 83.57 | 72.90 | 64.28 | a | 63.35 | 76.87 | ||||||||||||
1981 | 54.77 | 63.93 | 65.00 | 79.48 | a | 84.52 | 96.87 | 94.90 | 87.26 | 84.03 | 75.55 | 70.37 | 62.19 | 76.57 | ||||||||||||
1982 | 57.17 | a | 61.81 | b | 70.93 | a | 77.73 | 84.00 | a | 94.86 | a | 96.73 | a | 92.68 | 85.41 | a | 75.65 | 62.03 | a | 52.77 | a | 75.98 | ||||
1983 | 53.81 | 60.93 | 67.63 | a | 69.32 | b | 83.68 | 93.10 | 96.65 | 93.68 | 89.97 | 75.87 | 63.60 | 55.65 | 75.32 | |||||||||||
1984 | 56.61 | 62.28 | 68.94 | 75.40 | 89.19 | 89.93 | 91.68 | 87.06 | 86.07 | 69.42 | 62.77 | 55.68 | 74.59 | |||||||||||||
1985 | 50.26 | 59.46 | 67.32 | 77.83 | 85.39 | 93.57 | 94.13 | 92.84 | 83.27 | 73.94 | 66.28 | a | 58.84 | 75.26 | ||||||||||||
1986 | 62.19 | 63.50 | 69.74 | 79.97 | 84.42 | 90.80 | 90.68 | 91.58 | 84.47 | 74.52 | 60.97 | 52.94 | 75.48 | |||||||||||||
1987 | 55.90 | 59.78 | a | 65.87 | 74.53 | 81.65 | 90.20 | 94.06 | 88.90 | 84.17 | 80.71 | 65.17 | 53.61 | 74.55 | ||||||||||||
1988 | 54.13 | 62.62 | 68.10 | 75.90 | 85.03 | 92.80 | 91.42 | 86.10 | 84.93 | 79.87 | 66.73 | 53.94 | 75.13 | |||||||||||||
1989 | 56.87 | 61.25 | 72.94 | 83.55 | a | 88.87 | 95.37 | 93.97 | 89.06 | 84.63 | 77.84 | 66.90 | 54.32 | 77.13 | ||||||||||||
1990 | 55.84 | 59.43 | 67.39 | 77.13 | 83.39 | 98.97 | 89.35 | 86.77 | 83.30 | 76.19 | 65.10 | 55.00 | 74.82 | |||||||||||||
1991 | 53.39 | 61.46 | 64.94 | 76.10 | 86.00 | 92.47 | 88.58 | 86.97 | 80.00 | 78.74 | 60.87 | 54.00 | 73.63 | |||||||||||||
1992 | 49.81 | 60.68 | a | 67.71 | 78.59 | a | 79.50 | a | 90.33 | 93.52 | 90.55 | 88.80 | 79.45 | 59.30 | 52.35 | 74.22 | ||||||||||
1993 | 55.20 | a | 58.75 | 67.90 | 75.90 | 84.48 | 92.87 | 93.10 | 90.74 | 86.00 | 73.97 | 62.77 | 55.61 | 74.77 | ||||||||||||
1994 | 56.74 | 59.46 | 67.81 | 76.00 | 83.90 | 97.83 | 96.10 | 94.93 | a | 87.87 | 76.90 | 62.93 | a | 58.55 | 76.59 | |||||||||||
1995 | 55.83 | a | 65.75 | 69.10 | a | 73.67 | 83.13 | a | 92.63 | 95.16 | 92.65 | 84.53 | 79.71 | 68.77 | 58.93 | a | 76.66 | |||||||||
1996 | 58.90 | a | 65.93 | a | 67.23 | 77.83 | a | 91.81 | 95.76 | a | 92.74 | 90.32 | 82.90 | 76.42 | 65.59 | a | 59.68 | 77.09 | ||||||||
1997 | 54.00 | a | 59.12 | c | 72.30 | a | 71.37 | 84.68 | 92.70 | 93.77 | a | 91.26 | 89.00 | 75.81 | 63.83 | 51.39 | 74.93 | |||||||||
1998 | 59.03 | 56.43 | 65.61 | 71.34 | a | 86.87 | 93.97 | a | 92.83 | a | 91.26 | 91.30 | 75.37 | a | 66.97 | 57.13 | 75.68 | |||||||||
1999 | 60.32 | 66.29 | 69.74 | 74.72 | a | 85.17 | a | 91.23 | 90.48 | 91.13 | a | 85.57 | ----- | z | 71.87 | 56.30 | a | 76.62 | a | |||||||
2000 | 61.84 | ----- | z | 68.77 | a | 81.00 | a | 92.26 | 91.80 | 95.52 | 93.84 | 91.93 | a | ----- | z | ----- | z | ----- | z | 84.62 | d | |||||
2001 | 52.93 | a | 62.93 | ----- | z | 78.67 | 87.48 | ----- | z | 96.16 | ----- | z | ----- | z | ----- | z | 65.53 | 57.13 | 71.55 | e | ||||||
2002 | 57.42 | ----- | z | ----- | z | 82.40 | 87.00 | 98.67 | 94.61 | 95.97 | ----- | z | 73.74 | 64.76 | a | 52.90 | 78.61 | c | ||||||||
2003 | 61.81 | ----- | z | 67.77 | a | 76.17 | 89.03 | 93.53 | 97.00 | 94.20 | a | 88.57 | 81.60 | a | 67.11 | b | 55.81 | j | 81.68 | b | ||||||
2004 | 55.81 | 56.43 | a | 70.70 | a | 73.23 | 85.59 | b | 93.14 | a | 93.16 | 89.19 | 83.77 | 73.00 | a | 58.00 | 53.81 | 73.82 | ||||||||
2005 | 57.61 | 54.93 | 63.20 | a | 74.29 | b | 85.28 | b | 94.33 | 96.13 | 89.81 | 89.00 | 74.13 | 66.83 | 57.94 | 75.29 | ||||||||||
2006 | 59.26 | 62.39 | 67.29 | 80.27 | 88.90 | 94.43 | 93.16 | 84.68 | 78.67 | 72.19 | 65.69 | a | 52.83 | a | 74.98 | |||||||||||
2007 | 48.71 | 59.25 | 68.87 | 76.37 | ----- | z | ----- | z | ----- | z | ----- | z | 89.80 | t | 83.09 | t | 67.35 | m | 58.15 | k | 63.30 | h | ||||
2008 | 57.45 | k | 65.24 | h | 73.11 | l | 79.84 | k | 87.00 | s | 99.41 | m | 89.90 | u | 91.90 | u | 83.56 | n | 80.00 | o | 70.07 | o | 61.06 | m | ----- | z |
2009 | 63.94 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 55.90 | 60.92 | 67.53 | 76.55 | 85.72 | 94.23 | 93.96 | 91.63 | 86.52 | 76.80 | 64.89 | 56.63 | 75.74 | |||||||||||||
S.D. | 3.99 | 3.72 | 3.88 | 3.30 | 2.78 | 2.96 | 2.50 | 2.90 | 3.35 | 3.45 | 3.68 | 3.63 | 1.57 | |||||||||||||
SKEW | -0.15 | -0.13 | -0.25 | -0.03 | -0.24 | -0.76 | -0.32 | -0.08 | -0.16 | 0.11 | 0.38 | 0.18 | 0.17 | |||||||||||||
MAX | 63.84 | 69.18 | 76.03 | 83.55 | 92.31 | 100.40 | 99.81 | 97.48 | 92.83 | 84.97 | 73.30 | 66.13 | 80.61 | |||||||||||||
MIN | 44.71 | 50.79 | 56.58 | 69.10 | 75.47 | 82.47 | 87.13 | 84.68 | 76.17 | 69.42 | 58.00 | 47.39 | 72.39 | |||||||||||||
YRS | 93 | 88 | 89 | 86 | 87 | 90 | 88 | 89 | 88 | 87 | 89 | 88 | 70 |