YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.93 | 90.61 | 85.06 | 85.70 | 76.77 | 69.10 | 54.42 | 78.37 | e | |||||||
1916 | 47.73 | a | 54.07 | 75.00 | 67.74 | c | 84.00 | a | 86.28 | a | 97.93 | b | 98.61 | 86.17 | 75.10 | 64.65 | d | 50.75 | g | 76.12 | a | |||||
1917 | 50.19 | 55.09 | e | 63.62 | e | 71.14 | b | 74.70 | a | 93.10 | 100.10 | a | 89.11 | c | 86.47 | 72.61 | 65.87 | 41.32 | 71.94 | |||||||
1918 | 37.83 | a | 54.71 | 67.84 | 66.25 | b | 82.19 | 95.47 | 94.71 | 100.86 | b | 84.07 | 76.13 | 56.70 | 51.35 | 72.34 | ||||||||||
1919 | 46.84 | 49.68 | 63.45 | 71.23 | 76.58 | 81.32 | k | 94.32 | 95.32 | 87.71 | f | 70.19 | e | 57.93 | 43.45 | 66.90 | b | |||||||||
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 | 53.63 | a | 56.50 | 68.50 | a | 67.39 | b | 73.41 | d | 86.56 | e | 100.55 | 98.61 | 85.93 | b | 74.62 | b | 54.24 | a | 48.37 | d | 72.36 | ||||
1936 | 43.26 | 44.55 | 70.43 | a | 76.24 | a | 83.37 | d | 95.03 | 103.29 | 106.65 | 88.34 | a | 71.45 | 61.97 | 53.65 | 74.85 | |||||||||
1937 | 35.24 | f | 52.00 | b | 57.42 | 74.00 | a | 84.13 | a | 89.73 | 99.90 | 102.28 | b | 88.29 | f | 74.19 | 55.90 | 45.26 | 73.48 | b | ||||||
1938 | 52.42 | 54.36 | 67.44 | d | 70.82 | b | 78.45 | 88.86 | b | 96.32 | 99.61 | 90.27 | 86.81 | d | 60.50 | b | 52.74 | 74.88 | ||||||||
1939 | 54.87 | ----- | z | 65.47 | a | 70.85 | d | 84.57 | a | 92.96 | b | 101.00 | 97.26 | l | 95.90 | 82.52 | 62.66 | a | 57.96 | c | 76.88 | b | ||||
1940 | 30.94 | m | 54.10 | s | 66.90 | b | 73.07 | b | 81.72 | b | 91.14 | a | 97.83 | a | ----- | z | 86.83 | 81.97 | 56.33 | 52.61 | 76.49 | c | ||||
1941 | ----- | z | 47.68 | i | 57.68 | 72.39 | b | 82.97 | 87.38 | a | 97.16 | 96.38 | b | 90.67 | f | 72.17 | a | 61.97 | a | 54.07 | a | 75.80 | c | |||
1942 | 33.92 | s | ----- | z | 65.00 | b | 73.53 | 80.71 | 88.76 | a | 98.59 | b | 95.07 | c | 86.78 | c | 75.89 | d | 63.57 | 48.19 | 77.61 | b | ||||
1943 | 50.03 | 61.48 | c | 59.52 | 77.61 | b | 75.29 | 91.63 | 98.70 | h | 102.19 | e | 85.83 | a | 74.29 | 61.28 | a | 45.87 | 71.37 | a | ||||||
1944 | 47.81 | 53.41 | b | 57.45 | 67.69 | a | 81.03 | 92.97 | 93.39 | 95.50 | a | 86.93 | b | 76.20 | a | 61.63 | 45.68 | 71.64 | ||||||||
1945 | 48.68 | 49.36 | 68.16 | 66.77 | 78.00 | b | 85.90 | 92.10 | a | 95.00 | 85.33 | 73.81 | 65.21 | b | 45.68 | 71.17 | ||||||||||
1946 | 50.97 | 61.54 | b | 68.40 | a | 78.80 | 78.52 | b | 91.33 | 100.74 | 84.91 | t | 86.70 | 73.86 | i | 61.37 | 55.69 | b | 73.41 | b | ||||||
1947 | 42.23 | r | ----- | z | 63.94 | n | 68.83 | 77.10 | 90.33 | 95.83 | b | 100.94 | 94.48 | c | 86.67 | d | 55.97 | 50.32 | 80.05 | c | ||||||
1948 | 45.16 | 45.17 | 55.35 | 81.07 | c | 83.90 | 93.17 | 94.58 | 91.07 | a | 90.41 | c | 79.00 | 58.43 | 51.45 | 72.40 | ||||||||||
1949 | 38.39 | 47.52 | c | 61.00 | 71.83 | 81.71 | c | 90.00 | ----- | z | 90.64 | t | 83.39 | b | 75.21 | b | 68.53 | 50.84 | 66.84 | b | ||||||
1950 | 47.23 | 56.18 | 65.42 | 72.52 | c | 81.65 | 92.13 | 88.45 | 87.14 | c | 82.87 | 81.94 | 60.17 | 53.79 | c | 72.46 | ||||||||||
1951 | 54.05 | i | 65.12 | t | 62.52 | 70.79 | a | 80.35 | 87.27 | 95.52 | 99.03 | 83.86 | a | 72.03 | 54.03 | a | 49.81 | 75.52 | b | |||||||
1952 | 53.74 | 56.48 | 57.94 | 69.53 | 83.16 | 99.43 | 99.48 | 98.55 | 91.10 | 76.26 | 59.13 | 46.06 | 74.24 | |||||||||||||
1953 | 56.63 | a | 59.89 | 67.03 | 71.63 | 81.90 | 101.77 | 93.71 | 93.84 | 93.60 | 76.79 | b | 61.27 | 51.77 | 75.82 | |||||||||||
1954 | 50.35 | 67.36 | ----- | z | 80.52 | i | 74.48 | 91.10 | i | 103.11 | m | 101.52 | 95.13 | 78.07 | a | 67.83 | 55.52 | 73.78 | d | |||||||
1955 | 50.58 | 51.09 | e | 66.52 | b | 80.68 | b | 82.29 | 86.17 | 97.42 | 96.16 | 88.30 | 79.63 | d | 62.96 | b | 51.72 | b | 74.46 | |||||||
1956 | 40.69 | o | 51.68 | a | 66.90 | 72.57 | 86.68 | 96.62 | a | 98.52 | 100.52 | 93.83 | a | ----- | z | ----- | z | 56.59 | i | 83.41 | d | |||||
1957 | 40.97 | a | 55.79 | 52.60 | k | 66.80 | 76.84 | 87.45 | a | 98.78 | h | ----- | z | 82.90 | 69.92 | f | 56.50 | d | 58.08 | f | 66.75 | e | ||||
1958 | 51.97 | b | 47.96 | b | 43.93 | q | ----- | z | 83.93 | a | 94.27 | ----- | z | 96.07 | c | 87.03 | a | 76.90 | a | 65.20 | 50.14 | i | 75.42 | d | ||
1959 | 44.42 | 51.50 | b | 64.62 | b | 71.67 | 82.71 | 92.20 | 92.58 | 98.71 | c | ----- | z | ----- | z | 56.68 | e | 54.13 | 70.92 | b | ||||||
1960 | 44.65 | 43.14 | 49.97 | 75.70 | 79.71 | 90.40 | 91.32 | 94.06 | 86.87 | 75.32 | 62.93 | 45.84 | 69.99 | |||||||||||||
1961 | 49.55 | 52.75 | 61.74 | 71.83 | 79.10 | 88.33 | 94.32 | 91.19 | 82.50 | 75.61 | 53.77 | 42.90 | 70.30 | |||||||||||||
1962 | 41.65 | 55.25 | 61.94 | 71.50 | 88.97 | 87.77 | 95.03 | 97.58 | 84.33 | 77.19 | 59.27 | 50.13 | 72.55 | |||||||||||||
1963 | 40.68 | 57.14 | 68.94 | 77.27 | 83.35 | 91.13 | 97.10 | 96.81 | 86.63 | 85.26 | 64.43 | 41.84 | 74.21 | |||||||||||||
1964 | 56.13 | a | 50.59 | 61.45 | 76.77 | 83.94 | 92.43 | 100.39 | 94.65 | 86.60 | 74.87 | 58.73 | 46.00 | 73.55 | ||||||||||||
1965 | 51.81 | 52.96 | 52.74 | 77.40 | 82.65 | 90.00 | 97.81 | 94.39 | 86.03 | 77.23 | 65.80 | 56.52 | 73.78 | |||||||||||||
1966 | 41.87 | 48.57 | 66.52 | 71.30 | 84.84 | 91.90 | 98.13 | 89.48 | 82.69 | a | 76.71 | 66.60 | 49.55 | 72.35 | ||||||||||||
1967 | 53.58 | 54.39 | 70.94 | 77.23 | 82.16 | 90.33 | 91.42 | 93.48 | 82.27 | 77.48 | 58.50 | 49.03 | 73.40 | |||||||||||||
1968 | 46.68 | 51.38 | 65.87 | 73.10 | 79.23 | 91.30 | 94.48 | 92.90 | 86.20 | 78.03 | 55.57 | 45.65 | 71.70 | |||||||||||||
1969 | 45.58 | 52.82 | 51.87 | 73.20 | 82.77 | 90.83 | 100.48 | 94.58 | 86.77 | 69.77 | 64.47 | 51.23 | 72.03 | |||||||||||||
1970 | 45.26 | 60.00 | 55.48 | 73.03 | 86.84 | 93.37 | 99.84 | 99.77 | 86.03 | a | 70.84 | 58.70 | 56.68 | 73.82 | ||||||||||||
1971 | 50.26 | 47.68 | 64.35 | 76.87 | 84.55 | 93.93 | 97.35 | 92.81 | 86.73 | 77.84 | 61.10 | 48.73 | a | 73.52 | ||||||||||||
1972 | 47.19 | 57.45 | 73.19 | 79.03 | 81.97 | 93.00 | 92.94 | 93.10 | 88.13 | 72.57 | a | 51.37 | 43.48 | 72.78 | ||||||||||||
1973 | 41.35 | 52.82 | 60.83 | a | 67.40 | 81.55 | 93.37 | 96.00 | 97.23 | 82.83 | a | 78.77 | 62.63 | 49.30 | a | 72.01 | ||||||||||
1974 | 43.00 | 59.93 | 68.26 | 75.17 | 85.87 | 91.97 | 100.42 | 91.29 | 78.13 | 73.77 | 58.17 | 49.29 | 72.94 | |||||||||||||
1975 | 49.90 | 42.36 | 56.87 | 70.67 | 80.39 | 88.46 | d | 93.48 | 96.55 | 84.48 | a | 80.48 | 60.70 | 53.68 | 71.50 | |||||||||||
1976 | 55.33 | a | 68.59 | 68.87 | 74.97 | 76.45 | 91.27 | 94.32 | 98.35 | 86.73 | 70.39 | 58.77 | 55.23 | 74.94 | ||||||||||||
1977 | 42.26 | 62.45 | f | 70.27 | i | 76.50 | 83.90 | a | 93.91 | h | 99.85 | e | 91.84 | 89.78 | c | 80.15 | d | 61.17 | 52.87 | 75.37 | c | |||||
1978 | 35.94 | 36.25 | 62.68 | 75.07 | 80.45 | b | 91.76 | a | 102.71 | 97.03 | 90.90 | 80.00 | 59.00 | 51.82 | c | 71.97 | ||||||||||
1979 | 30.93 | a | 42.46 | 62.93 | d | 72.00 | f | 79.37 | d | 91.15 | c | ----- | z | ----- | z | ----- | z | 84.52 | b | 56.97 | a | 55.87 | a | 63.02 | d | |
1980 | 46.71 | 47.93 | 59.68 | 71.23 | 79.83 | a | 95.85 | c | 104.77 | 101.26 | 90.48 | a | 78.65 | 63.90 | a | 55.71 | 74.67 | |||||||||
1981 | 54.13 | a | 60.14 | 63.90 | 82.92 | e | 79.27 | a | 94.97 | 96.48 | 93.89 | c | 88.42 | d | 71.71 | 61.83 | a | 49.10 | 74.73 | |||||||
1982 | 47.90 | a | 46.67 | a | 64.63 | a | 71.80 | 80.67 | a | 86.83 | 95.32 | 98.55 | 89.77 | 78.20 | a | 60.57 | 51.42 | 72.69 | ||||||||
1983 | 49.03 | 52.39 | 63.00 | a | 67.07 | 81.35 | 86.66 | a | 99.31 | b | 101.48 | d | 90.52 | a | 73.68 | 62.03 | 34.27 | a | 71.73 | |||||||
1984 | 47.39 | 62.10 | 57.84 | 67.03 | 80.73 | a | 94.93 | a | 99.03 | 98.74 | 88.50 | 74.19 | 62.00 | 50.23 | 73.56 | |||||||||||
1985 | 42.48 | 48.29 | 64.67 | a | 76.23 | 85.48 | d | 92.17 | 99.35 | 96.29 | 87.07 | a | 71.71 | 53.60 | 45.10 | 71.87 | ||||||||||
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.16 | 54.34 | a | 49.19 | 58.23 | i | ||
1987 | 44.19 | 55.14 | 62.93 | c | 75.20 | 83.94 | 92.10 | 94.00 | 96.61 | 85.03 | 73.72 | b | 58.85 | d | 47.19 | 72.41 | ||||||||||
1988 | 39.94 | 53.69 | 59.87 | 72.00 | 83.94 | 95.47 | 97.26 | 99.13 | 88.55 | a | 71.87 | 62.47 | 57.03 | 73.43 | ||||||||||||
1989 | 55.13 | a | 42.32 | 66.61 | 77.53 | 82.00 | a | 87.21 | b | 93.16 | 88.70 | h | 81.79 | a | 78.47 | a | 63.63 | 42.00 | a | 69.99 | a | |||||
1990 | 56.90 | 56.64 | 62.39 | 71.10 | a | 78.47 | a | 97.77 | 93.90 | a | 95.71 | 91.31 | a | 76.61 | 64.87 | 45.81 | 74.29 | |||||||||
1991 | 42.20 | a | 66.19 | a | 67.77 | 75.57 | 84.55 | 92.86 | a | 98.45 | 94.68 | 83.07 | b | 78.38 | b | 52.72 | a | 50.10 | 73.88 | |||||||
1992 | 53.39 | 59.96 | a | 68.57 | a | 74.78 | c | 78.42 | 85.21 | a | 95.43 | a | 88.75 | c | 87.40 | 77.81 | e | 53.00 | a | 46.45 | b | 72.43 | ||||
1993 | 41.00 | 46.63 | a | 57.55 | 67.60 | 77.37 | d | 89.55 | a | 96.87 | 98.19 | d | 84.53 | 72.37 | a | 56.80 | 52.60 | a | 70.09 | |||||||
1994 | 48.10 | 50.19 | b | 69.30 | a | 75.41 | a | 80.42 | 96.31 | a | 95.23 | 96.61 | 85.24 | a | 73.27 | a | 59.00 | 50.94 | 73.33 | |||||||
1995 | 48.48 | b | 58.31 | b | 59.58 | 70.48 | a | 74.33 | a | 88.73 | 98.32 | c | 95.81 | 82.97 | 77.93 | b | 65.25 | b | 47.62 | b | 72.32 | |||||
1996 | 48.03 | a | 58.62 | 60.40 | a | 77.48 | a | 88.41 | b | 93.32 | b | 96.24 | b | 89.25 | o | 83.38 | d | 73.77 | 54.63 | 53.28 | b | 71.60 | a | |||
1997 | 46.36 | c | 51.44 | a | 67.97 | a | 66.48 | c | 81.06 | 89.34 | a | 96.94 | 92.37 | a | 88.64 | b | 74.74 | 56.70 | c | 44.61 | 71.39 | |||||
1998 | 47.00 | 53.11 | a | 52.74 | d | 67.92 | e | 86.97 | 98.03 | a | 100.17 | a | 95.42 | 92.80 | 73.65 | 60.70 | 49.20 | a | 73.14 | |||||||
1999 | 45.87 | a | 59.11 | a | 55.76 | b | 70.50 | b | 80.53 | a | 84.89 | b | 95.23 | 96.71 | 82.42 | f | 72.86 | b | 68.28 | a | 50.83 | a | 70.96 | a | ||
2000 | 48.07 | a | 56.14 | a | 60.86 | c | 70.48 | a | 82.86 | c | 86.57 | 96.54 | c | 102.58 | 93.10 | a | 72.37 | a | 53.03 | 37.90 | 71.71 | |||||
2001 | 44.37 | a | 50.64 | 53.71 | c | 75.90 | 82.39 | c | 91.47 | 102.48 | 98.17 | a | 87.64 | b | 76.81 | e | 64.86 | a | 52.73 | a | 73.43 | |||||
2002 | 51.03 | 51.24 | c | 60.72 | b | 71.84 | e | 78.83 | a | 92.13 | g | 94.14 | b | 93.73 | a | 88.14 | b | 63.56 | f | 60.10 | 48.46 | c | 69.82 | b | ||
2003 | 46.17 | b | 47.00 | 59.23 | a | 71.93 | c | 80.61 | 85.82 | b | 101.31 | b | 97.38 | b | 81.17 | 72.90 | 58.17 | 49.48 | 70.93 | |||||||
2004 | 46.38 | b | 46.64 | a | 64.65 | 69.64 | b | 84.70 | a | 87.20 | 92.87 | 89.43 | a | 89.17 | 74.27 | a | 57.73 | 53.29 | 71.33 | |||||||
2005 | 41.79 | b | 53.25 | 61.10 | 70.30 | 81.71 | 91.27 | d | 94.23 | 92.87 | 90.83 | 73.93 | a | 65.03 | a | 46.77 | 71.92 | |||||||||
2006 | 59.35 | 52.50 | 63.03 | b | 82.54 | b | 85.00 | a | 93.00 | 99.18 | c | 95.73 | a | ----- | z | ----- | z | 64.91 | s | 52.41 | b | 75.86 | c | |||
2007 | 42.29 | 45.61 | 67.90 | a | 63.33 | 78.42 | 85.69 | a | 90.97 | 96.47 | a | 85.52 | c | 76.43 | c | 65.33 | 44.10 | a | 70.17 | |||||||
2008 | 50.19 | 49.17 | 60.93 | b | 67.33 | 80.50 | e | 92.80 | 94.03 | b | 90.41 | b | 80.54 | b | 70.21 | g | 62.76 | e | 47.68 | i | 72.87 | b | ||||
2009 | 51.00 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 47.30 | 52.93 | 62.95 | 72.69 | 81.39 | 91.13 | 96.71 | 95.97 | 87.02 | 76.05 | 60.37 | 49.53 | 72.72 | |||||||||||||
S.D. | 5.41 | 6.14 | 5.20 | 4.15 | 3.27 | 3.58 | 3.32 | 3.98 | 3.63 | 3.80 | 4.20 | 4.62 | 1.37 | |||||||||||||
SKEW | -0.24 | 0.10 | -0.29 | 0.28 | -0.23 | 0.39 | 0.03 | -0.21 | 0.30 | 0.82 | -0.06 | -0.63 | 0.05 | |||||||||||||
MAX | 59.35 | 68.59 | 75.00 | 82.92 | 88.97 | 101.77 | 104.77 | 106.65 | 95.90 | 86.81 | 69.10 | 57.96 | 75.82 | |||||||||||||
MIN | 30.93 | 36.25 | 49.97 | 63.33 | 73.41 | 84.89 | 88.45 | 85.06 | 78.13 | 69.77 | 51.37 | 34.27 | 69.99 | |||||||||||||
YRS | 70 | 70 | 72 | 74 | 77 | 74 | 72 | 70 | 71 | 72 | 77 | 74 | 52 |