YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.90 | b | 73.29 | 73.57 | 61.90 | 55.23 | d | 40.68 | a | 63.93 | f | |||
1916 | 34.77 | a | 40.98 | 56.32 | 52.98 | d | 69.45 | b | 74.33 | a | 83.11 | c | 83.08 | 74.04 | c | 65.96 | h | 50.31 | f | 35.46 | g | 63.23 | c | |||
1917 | 36.18 | a | 38.22 | e | 45.82 | f | 56.48 | b | 60.15 | a | 76.67 | a | 85.17 | a | 77.71 | c | 72.32 | 54.61 | 50.84 | b | 28.74 | 57.92 | a | |||
1918 | 24.97 | a | 37.71 | 51.39 | 52.30 | c | 69.55 | 80.85 | 81.16 | 85.93 | c | 68.90 | a | 64.13 | 47.43 | 39.95 | 58.69 | |||||||||
1919 | 34.95 | 39.59 | 50.48 | 58.78 | 65.84 | 70.97 | k | 82.15 | 82.00 | 75.02 | f | 60.27 | e | 44.63 | 32.72 | a | 55.14 | 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 | 40.76 | b | 43.46 | a | 55.78 | a | 55.54 | b | 63.63 | h | 75.10 | e | 86.58 | 85.06 | 72.65 | c | 62.65 | d | 44.06 | e | 37.52 | g | 62.16 | b | ||
1936 | 32.23 | a | 30.23 | a | 53.15 | a | 59.28 | a | 70.89 | h | 80.28 | a | 87.95 | 89.68 | 76.98 | a | 58.66 | 46.87 | 42.55 | a | 59.81 | a | ||||
1937 | 26.86 | f | 39.25 | b | 45.02 | 59.43 | b | 70.91 | b | 78.30 | 85.92 | 88.50 | b | 74.50 | h | 60.58 | 44.68 | 35.73 | 60.83 | b | ||||||
1938 | 39.65 | 42.50 | 54.73 | e | 57.61 | b | 67.69 | 76.96 | b | 82.74 | 85.66 | 75.68 | 70.42 | e | 46.91 | b | 39.73 | 61.69 | ||||||||
1939 | 42.68 | ----- | z | 50.88 | a | 57.65 | d | 68.82 | i | 80.78 | n | 86.26 | l | 83.05 | l | 78.88 | 65.92 | 48.47 | a | 42.84 | c | 55.33 | e | |||
1940 | 21.19 | m | 41.10 | s | 52.23 | c | 59.73 | b | 68.09 | b | 77.19 | a | 83.88 | a | ----- | z | 73.95 | 66.44 | 44.90 | 41.32 | a | 63.08 | c | |||
1941 | ----- | z | 38.03 | i | 45.71 | 60.52 | c | 71.66 | c | 75.36 | a | 83.17 | a | 83.28 | d | 78.83 | g | 62.58 | a | 48.32 | b | 42.45 | c | 63.67 | c | |
1942 | 21.46 | s | ----- | z | 50.71 | b | 62.02 | a | 67.47 | 77.60 | a | 84.38 | b | 82.18 | c | 73.15 | c | 62.72 | d | 50.03 | a | 37.94 | 64.82 | b | ||
1943 | 36.60 | 45.82 | c | 45.06 | 63.05 | b | 64.61 | 80.20 | 84.91 | h | 87.67 | e | 72.93 | a | 60.16 | 46.43 | b | 35.31 | 57.99 | a | ||||||
1944 | 38.19 | 42.46 | b | 45.18 | 55.64 | a | 69.05 | 80.98 | 81.29 | 83.08 | a | 73.60 | e | 63.30 | a | 51.67 | 36.06 | 60.04 | ||||||||
1945 | 38.18 | 39.55 | 53.94 | 55.68 | 65.43 | b | 74.00 | 80.17 | a | 81.95 | 73.02 | 61.15 | 50.52 | b | 33.60 | 58.93 | ||||||||||
1946 | 38.97 | 47.13 | b | 55.65 | a | 64.25 | 64.83 | b | 78.55 | 85.81 | 75.00 | t | 73.77 | 63.57 | i | 49.63 | 43.79 | b | 60.24 | b | ||||||
1947 | 30.42 | r | ----- | z | 49.44 | n | 57.27 | 65.29 | 77.67 | 81.64 | b | 86.34 | 78.67 | c | 72.61 | d | 45.27 | 39.69 | 67.16 | c | ||||||
1948 | 34.17 | a | 35.66 | 43.87 | 67.06 | d | 70.50 | 79.93 | a | 82.84 | 79.42 | a | 75.00 | c | 62.21 | 46.85 | 40.68 | 59.85 | ||||||||
1949 | 28.61 | 37.80 | c | 49.05 | 58.88 | 70.14 | c | 78.62 | ----- | z | 76.36 | t | 69.86 | b | 61.74 | b | 51.28 | a | 37.71 | 54.37 | b | |||||
1950 | 34.03 | 41.66 | 49.24 | 58.93 | c | 69.16 | 79.48 | 77.84 | 76.05 | c | 71.10 | 67.02 | 45.22 | 37.96 | c | 58.97 | ||||||||||
1951 | 40.80 | i | 53.06 | t | 47.03 | 57.33 | a | 68.19 | 75.73 | 83.45 | 84.94 | 71.31 | a | 60.35 | 42.57 | a | 37.50 | 62.84 | b | |||||||
1952 | 41.23 | 44.14 | 45.60 | 56.37 | 69.19 | 85.82 | 84.56 | 85.37 | 74.00 | 58.10 | 46.37 | 35.39 | 60.51 | |||||||||||||
1953 | 42.42 | a | 44.54 | a | 53.66 | 57.28 | 68.81 | 87.12 | 81.77 | 80.23 | 76.72 | 63.03 | b | 48.88 | 39.85 | 62.03 | ||||||||||
1954 | 35.98 | 50.61 | ----- | z | 67.67 | i | 63.44 | 77.55 | i | 88.85 | n | 87.32 | a | 79.65 | 64.81 | b | 50.98 | 40.02 | 59.10 | d | ||||||
1955 | 38.37 | 37.76 | e | 49.45 | c | 64.25 | d | 69.61 | 73.65 | 84.45 | 82.24 | 74.98 | 62.76 | d | 46.57 | b | 37.14 | b | 60.10 | |||||||
1956 | 31.16 | o | 38.02 | a | 49.74 | 56.72 | 72.88 | b | 83.06 | d | 84.53 | 85.21 | b | 76.76 | a | ----- | z | ----- | z | 42.86 | j | 68.36 | d | |||
1957 | 29.91 | c | 44.84 | 43.42 | k | 55.83 | 64.82 | 74.71 | a | 84.76 | h | ----- | z | 66.69 | f | 57.86 | f | 45.88 | d | 43.25 | i | 52.67 | f | |||
1958 | 38.82 | c | 36.69 | b | 35.58 | s | ----- | z | 69.74 | b | 78.88 | ----- | z | 80.68 | f | 74.30 | b | 63.75 | k | 49.22 | a | 37.34 | o | 57.94 | f | |
1959 | 29.35 | n | 36.90 | g | 47.58 | g | 57.26 | a | 70.02 | 78.10 | 78.77 | 83.50 | d | ----- | z | ----- | z | 41.52 | e | 42.97 | 64.59 | e | ||||
1960 | 34.97 | 33.57 | 39.21 | 62.37 | 65.61 | 78.10 | 78.98 | 80.31 | 72.90 | 61.63 | 48.70 | 36.27 | 57.72 | |||||||||||||
1961 | 35.13 | 40.71 | 49.31 | 57.73 | 66.87 | 75.93 | 80.87 | 79.13 | 70.22 | 62.05 | 44.12 | 33.71 | 57.98 | |||||||||||||
1962 | 30.02 | 42.52 | 47.23 | 58.32 | 75.71 | 76.23 | 83.15 | 82.71 | 72.70 | 64.40 | 47.33 | 38.24 | 59.88 | |||||||||||||
1963 | 26.90 | 41.11 | 53.52 | 63.10 | 71.13 | 79.08 | 84.47 | 83.40 | 74.92 | 69.63 | 49.75 | 30.35 | 60.61 | |||||||||||||
1964 | 40.40 | a | 38.38 | 45.89 | 62.63 | 70.95 | 79.12 | 86.68 | 81.13 | 73.85 | 59.98 | 48.52 | a | 34.40 | 60.16 | |||||||||||
1965 | 38.81 | 38.71 | 39.53 | 63.27 | 70.27 | 77.57 | 84.56 | 80.61 | 73.03 | 61.85 | 52.53 | 45.03 | 60.48 | |||||||||||||
1966 | 31.05 | 36.36 | 51.52 | 56.87 | 68.29 | 78.80 | 85.95 | 77.52 | 69.90 | a | 60.63 | 51.47 | 35.21 | 58.63 | ||||||||||||
1967 | 38.53 | 39.73 | 54.23 | 64.87 | 66.81 | 77.88 | 78.81 | 78.87 | 69.67 | 63.03 | 46.03 | 38.21 | 59.72 | |||||||||||||
1968 | 35.98 | 38.24 | 51.58 | 58.42 | 65.45 | 78.30 | 81.84 | 81.18 | 71.65 | 62.89 | 44.95 | 33.97 | 58.70 | |||||||||||||
1969 | 36.08 | 41.73 | 40.60 | 59.87 | 70.24 | 77.13 | 86.94 | 82.05 | 74.90 | 58.58 | 48.25 | 39.27 | 59.64 | |||||||||||||
1970 | 32.24 | 43.59 | 43.69 | 59.02 | 72.74 | 78.78 | 85.21 | 85.66 | 73.84 | a | 58.69 | 45.72 | 41.73 | 60.08 | ||||||||||||
1971 | 35.31 | 34.91 | 49.10 | 61.38 | 68.87 | 81.47 | 83.37 | 79.90 | 74.60 | 63.89 | 49.32 | 39.83 | a | 60.16 | ||||||||||||
1972 | 34.08 | 41.22 | 55.58 | 63.07 | 68.61 | 79.57 | 81.02 | 80.79 | 76.23 | 59.95 | a | 42.42 | 32.71 | 59.60 | ||||||||||||
1973 | 31.76 | 41.04 | 51.43 | a | 55.52 | 66.94 | 79.37 | 82.77 | 83.55 | 71.81 | a | 65.69 | 50.33 | 37.57 | a | 59.81 | ||||||||||
1974 | 31.32 | 44.27 | 52.65 | 61.20 | 71.48 | a | 76.13 | 85.84 | 78.29 | 65.27 | 62.18 | 47.47 | a | 37.95 | 59.50 | |||||||||||
1975 | 38.15 | 31.52 | a | 44.90 | 57.88 | a | 67.72 | a | 75.74 | e | 80.77 | 83.31 | 70.74 | a | 62.81 | e | 48.63 | 40.68 | 58.57 | |||||||
1976 | 38.90 | a | 49.58 | d | 51.93 | d | 61.53 | 63.35 | 76.84 | b | 80.87 | 82.81 | 72.92 | 56.60 | 43.82 | 38.87 | 59.83 | |||||||||
1977 | 28.95 | 46.61 | j | 53.61 | i | 62.97 | 71.24 | n | 79.92 | q | 86.56 | e | 80.81 | 77.44 | d | 64.15 | e | 48.58 | 38.71 | 61.02 | d | |||||
1978 | 25.02 | 27.36 | 48.26 | 61.80 | 67.79 | b | 79.93 | a | 87.77 | 83.61 | 78.22 | 63.08 | 48.02 | 37.68 | c | 59.04 | ||||||||||
1979 | 21.62 | b | 30.52 | 49.27 | e | 56.95 | h | 65.88 | g | 77.46 | d | ----- | z | ----- | z | ----- | z | 64.95 | k | 45.29 | a | 41.22 | a | 44.23 | f | |
1980 | 36.18 | a | 35.83 | 46.05 | 56.42 | 66.77 | a | 82.84 | e | 89.52 | a | 87.26 | 77.26 | a | 62.27 | 48.70 | c | 41.98 | 60.92 | |||||||
1981 | 38.73 | a | 45.02 | a | 50.95 | 66.05 | j | 66.66 | b | 82.19 | a | 85.23 | 81.48 | d | 75.48 | f | 61.34 | 50.62 | a | 38.82 | 60.10 | b | ||||
1982 | 33.41 | b | 33.74 | a | 50.33 | b | 57.77 | 69.00 | a | 74.55 | 83.61 | 85.29 | b | 76.23 | 62.00 | a | 46.71 | a | 40.57 | a | 59.43 | |||||
1983 | 37.88 | a | 42.41 | a | 49.86 | b | 54.61 | b | 66.53 | a | 74.14 | b | 86.16 | c | 88.10 | e | 77.57 | a | 60.87 | 48.34 | b | 23.22 | a | 59.14 | ||
1984 | 31.67 | a | 44.41 | 42.39 | 53.53 | 64.33 | a | 79.47 | a | 83.00 | 82.56 | 72.72 | a | 59.23 | a | 48.10 | 39.72 | a | 58.43 | |||||||
1985 | 29.68 | 36.12 | 52.53 | a | 62.22 | a | 71.63 | d | 79.20 | 85.21 | 82.94 | 74.78 | a | 60.29 | 43.62 | 33.55 | 59.31 | |||||||||
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.10 | 43.66 | a | 39.21 | 47.99 | i | ||
1987 | 34.56 | 45.14 | 49.96 | c | 60.37 | 72.06 | 79.40 | 82.44 | 83.74 | 73.32 | 60.14 | b | 47.62 | e | 37.47 | 60.52 | ||||||||||
1988 | 30.69 | 40.37 | b | 47.31 | 57.77 | 71.06 | 81.15 | 84.02 | 85.37 | 74.47 | a | 59.79 | 49.43 | 42.97 | 60.37 | |||||||||||
1989 | 41.00 | a | 31.70 | 50.34 | 62.85 | 69.80 | a | 75.32 | b | 80.88 | a | 79.05 | i | 68.88 | a | 63.98 | a | 48.37 | 29.78 | a | 56.63 | a | ||||
1990 | 43.27 | 43.75 | 51.16 | 58.14 | b | 67.10 | a | 84.42 | 82.17 | a | 82.66 | 78.03 | a | 62.55 | 52.23 | 32.65 | 61.51 | |||||||||
1991 | 31.42 | a | 48.96 | a | 53.27 | 62.50 | 73.05 | 80.96 | b | 85.37 | 81.89 | 72.43 | b | 64.17 | b | 42.28 | a | 41.53 | 61.49 | |||||||
1992 | 42.18 | 47.48 | a | 54.10 | a | 60.39 | c | 66.34 | 73.98 | a | 82.97 | b | 77.18 | c | 74.57 | 63.13 | e | 44.28 | a | 37.31 | b | 60.33 | ||||
1993 | 32.39 | 36.87 | a | 46.48 | 55.88 | 66.43 | d | 78.03 | a | 85.23 | 85.44 | d | 70.97 | 58.78 | a | 43.37 | 39.50 | a | 58.28 | |||||||
1994 | 35.00 | 36.06 | b | 52.70 | a | 59.41 | a | 67.56 | 82.98 | a | 81.94 | 82.92 | a | 72.38 | a | 61.87 | a | 48.22 | 40.45 | 60.12 | ||||||
1995 | 36.97 | b | 45.00 | b | 48.78 | a | 56.76 | a | 63.42 | a | 75.60 | 84.04 | d | 83.69 | 71.57 | 62.29 | b | 48.69 | c | 36.31 | b | 59.43 | ||||
1996 | 34.13 | a | 41.17 | 44.33 | a | 59.55 | a | 75.10 | b | 79.80 | b | 83.24 | b | 78.54 | q | 71.73 | d | 61.60 | 44.53 | 39.00 | b | 57.65 | a | |||
1997 | 33.96 | c | 41.17 | a | 52.00 | a | 53.72 | c | 66.84 | 75.97 | a | 83.98 | 80.19 | b | 76.39 | b | 62.79 | 45.19 | c | 35.85 | 59.00 | |||||
1998 | 36.53 | 42.38 | c | 41.70 | d | 54.58 | f | 75.07 | c | 83.64 | b | 86.31 | b | 82.12 | a | 78.97 | a | 60.81 | d | 49.87 | 37.78 | b | 61.38 | a | ||
1999 | 34.35 | a | 45.52 | a | 44.19 | b | 56.10 | d | 66.93 | b | 74.56 | d | 83.06 | 82.58 | 70.58 | f | 58.22 | b | 51.28 | c | 38.50 | a | 57.75 | a | ||
2000 | 34.71 | b | 41.70 | b | 48.14 | c | 56.00 | a | 69.59 | c | 74.86 | a | 83.21 | c | 87.76 | 75.59 | a | 60.59 | c | 41.80 | 27.48 | b | 58.45 | |||
2001 | 33.28 | a | 38.18 | 42.86 | c | 61.60 | 67.98 | d | 77.93 | 88.40 | 84.25 | a | 72.66 | b | 59.27 | e | 51.62 | a | 37.70 | a | 59.64 | |||||
2002 | 35.81 | 38.15 | e | 42.59 | c | 58.84 | e | 64.97 | a | 79.71 | i | 82.56 | d | 81.45 | b | 74.81 | c | 53.73 | g | 46.65 | 36.80 | c | 56.26 | b | ||
2003 | 33.22 | b | 34.18 | 44.61 | c | 56.76 | c | 66.47 | 73.27 | b | 86.48 | b | 84.07 | b | 68.78 | 59.98 | 45.53 | 37.19 | 57.55 | |||||||
2004 | 33.72 | b | 35.33 | c | 52.11 | 56.79 | b | 69.98 | a | 75.18 | 80.27 | 77.03 | a | 74.87 | 61.57 | a | 48.85 | 38.73 | 58.70 | |||||||
2005 | 31.97 | b | 42.20 | 47.50 | 56.41 | a | 68.13 | 78.38 | d | 80.60 | 80.81 | 76.57 | 61.45 | b | 48.79 | a | 33.47 | 58.86 | ||||||||
2006 | 43.11 | 35.87 | a | 47.83 | b | 63.74 | c | 70.72 | a | 78.62 | 85.30 | c | 83.82 | a | ----- | z | ----- | z | 47.83 | u | 38.88 | f | 63.63 | d | ||
2007 | 32.13 | a | 34.71 | 55.88 | a | 52.20 | b | 69.12 | a | 75.76 | c | 80.55 | a | 84.76 | b | 75.39 | c | 63.61 | d | 48.60 | 33.87 | a | 58.88 | |||
2008 | 36.26 | 37.14 | 47.18 | c | 53.97 | 67.69 | e | 78.93 | b | 81.41 | c | 79.45 | c | 69.00 | d | 58.02 | g | 48.81 | f | 35.61 | i | 61.22 | c | |||
2009 | 36.53 | 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 | 35.00 | 39.92 | 49.01 | 58.81 | 68.41 | 78.25 | 83.46 | 82.67 | 73.78 | 62.08 | 47.46 | 37.57 | 59.60 | |||||||||||||
S.D. | 4.46 | 4.79 | 4.22 | 3.26 | 2.91 | 2.93 | 2.51 | 3.15 | 2.86 | 2.92 | 2.85 | 3.95 | 1.02 | |||||||||||||
SKEW | -0.42 | -0.17 | -0.33 | 0.18 | 0.08 | 0.64 | -0.00 | -0.30 | -0.23 | 0.94 | 0.01 | -1.01 | 0.27 | |||||||||||||
MAX | 43.27 | 50.61 | 56.32 | 67.06 | 75.71 | 87.12 | 89.52 | 89.68 | 79.65 | 72.61 | 55.23 | 45.03 | 62.03 | |||||||||||||
MIN | 21.62 | 27.36 | 39.21 | 52.20 | 60.15 | 73.27 | 77.84 | 73.29 | 65.27 | 54.61 | 41.52 | 23.22 | 57.55 | |||||||||||||
YRS | 69 | 69 | 70 | 72 | 72 | 72 | 71 | 69 | 69 | 69 | 75 | 72 | 47 |