YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.23 | 70.04 | d | ----- | z | ----- | z | 71.14 | j | |
1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 91.94 | o | 93.92 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | 37.38 | b | 38.78 | a | 59.42 | 66.57 | 74.61 | 73.63 | 86.94 | 81.03 | 73.00 | 62.52 | b | 49.93 | a | 46.10 | a | 62.49 | ||||||||
1911 | 41.68 | 41.25 | 58.35 | ----- | z | ----- | z | 90.40 | y | ----- | z | 81.71 | ----- | z | ----- | z | 48.96 | d | 44.19 | 52.69 | f | |||||
1912 | 35.93 | b | 47.25 | a | 51.52 | 58.93 | 70.26 | 80.20 | 83.39 | 78.07 | a | 71.40 | 59.65 | 50.50 | ----- | z | 62.46 | a | ||||||||
1913 | 40.89 | c | 39.46 | b | 49.77 | a | 64.67 | 69.39 | 75.87 | 83.65 | 85.74 | 75.27 | 59.29 | 51.63 | 38.90 | 61.21 | ||||||||||
1914 | 44.90 | 44.46 | b | 58.06 | 64.20 | 73.06 | 76.07 | a | 87.55 | 87.10 | 69.70 | 63.13 | a | 52.43 | 33.71 | 62.87 | ||||||||||
1915 | 35.34 | b | 45.86 | 58.61 | 68.03 | 67.52 | 75.60 | 82.71 | 90.81 | 76.27 | 66.77 | 47.80 | 40.48 | 62.98 | ||||||||||||
1916 | 26.03 | 39.03 | 54.42 | 65.13 | 66.19 | 75.40 | 79.13 | 85.16 | 76.50 | 65.97 | 44.83 | 36.97 | 59.56 | |||||||||||||
1917 | 41.07 | a | 44.36 | 46.80 | a | 58.48 | a | 68.45 | 77.25 | b | 90.13 | 89.06 | 76.90 | 70.35 | 53.72 | a | 50.94 | 63.96 | ||||||||
1918 | 45.29 | 41.64 | 54.81 | 65.83 | 66.84 | 84.29 | b | 86.06 | 78.48 | b | 80.33 | 66.37 | a | 51.77 | 42.74 | 63.70 | ||||||||||
1919 | 42.47 | a | ----- | z | 62.33 | v | 65.69 | a | 71.42 | 79.33 | 91.16 | 88.16 | 73.30 | 59.23 | 48.13 | 27.97 | 64.69 | b | ||||||||
1920 | 37.29 | 45.93 | a | 52.65 | 55.97 | a | 67.87 | 74.70 | 86.53 | a | 85.81 | 70.60 | 59.03 | 47.33 | 42.29 | 60.50 | ||||||||||
1921 | 38.61 | 43.86 | 53.52 | 58.73 | 70.06 | 78.53 | 84.77 | 84.23 | 69.57 | 64.43 | a | 47.03 | 35.00 | 60.70 | ||||||||||||
1922 | 30.59 | b | 37.71 | 48.23 | 57.63 | 68.47 | a | 82.93 | a | 87.52 | 82.65 | 76.73 | 62.00 | 42.10 | 33.42 | 59.16 | ||||||||||
1923 | 41.48 | 35.82 | 51.26 | 61.60 | 66.74 | 73.13 | 82.77 | 83.29 | 76.52 | a | 58.90 | 49.73 | 41.42 | 60.22 | ||||||||||||
1924 | 34.90 | 50.00 | 50.42 | 61.87 | 79.03 | 80.73 | 86.81 | 85.23 | a | 77.21 | a | 60.19 | 42.70 | ----- | z | 64.46 | a | |||||||||
1925 | ----- | z | ----- | z | 55.72 | f | 65.50 | 72.03 | 75.63 | 89.48 | 83.77 | 75.20 | 65.52 | 48.27 | 43.97 | 68.82 | c | |||||||||
1926 | 39.47 | a | 50.93 | 62.13 | 69.17 | 71.10 | 85.00 | 88.94 | 84.79 | b | 70.65 | d | 65.17 | g | 49.93 | b | 41.92 | r | 67.21 | b | ||||||
1927 | 34.30 | a | 46.52 | g | 52.76 | b | 58.89 | b | 63.71 | 75.36 | b | 84.45 | 82.35 | 66.50 | d | 60.10 | b | 48.77 | 34.87 | a | 60.19 | a | ||||
1928 | 31.76 | b | 42.92 | c | 51.97 | 55.57 | 72.97 | 72.33 | 86.42 | 83.61 | 75.45 | a | 63.42 | 49.30 | c | 37.94 | 60.30 | |||||||||
1929 | 32.55 | 33.11 | 53.55 | 58.00 | 69.14 | b | 74.35 | d | 83.70 | a | 87.84 | 75.28 | a | 67.13 | 51.37 | 44.52 | 60.88 | |||||||||
1930 | 21.44 | d | 48.14 | g | 55.52 | 66.55 | a | 66.77 | 75.47 | 87.13 | a | 87.52 | 76.10 | 58.55 | 47.27 | 37.88 | f | 64.23 | b | |||||||
1931 | 40.84 | 45.46 | 53.24 | b | 61.76 | a | 74.90 | 74.57 | 87.84 | 86.03 | 73.80 | 63.11 | c | 44.37 | 34.74 | 61.72 | ||||||||||
1932 | 37.55 | 41.17 | 49.97 | a | 60.41 | a | 66.03 | 79.37 | 81.63 | a | 83.89 | c | 77.83 | 64.40 | a | 50.70 | 37.29 | 60.85 | ||||||||
1933 | 40.81 | 38.48 | a | 52.58 | 62.23 | 64.47 | a | 75.48 | a | 86.97 | 87.87 | a | 69.67 | 66.93 | c | 50.19 | c | 46.92 | e | 61.88 | ||||||
1934 | 47.53 | a | 50.88 | b | 62.04 | d | 71.85 | c | 74.06 | 79.33 | 85.23 | a | 87.66 | b | 74.86 | a | 62.93 | d | 48.30 | j | 37.57 | h | 69.64 | b | ||
1935 | 40.25 | g | 44.86 | 50.18 | c | 59.00 | 72.84 | 77.97 | 85.90 | a | 84.80 | a | 82.64 | b | 63.45 | 43.61 | b | 36.10 | 63.76 | a | ||||||
1936 | 41.97 | a | 29.69 | 53.32 | 66.55 | a | 74.13 | a | 77.37 | 85.71 | 86.19 | 76.93 | 69.10 | 46.30 | 43.30 | a | 62.55 | |||||||||
1937 | 22.65 | 39.29 | 53.42 | 55.90 | 69.23 | a | 78.74 | k | 87.32 | 81.58 | 77.30 | 66.84 | 50.14 | b | 43.25 | c | 58.81 | a | ||||||||
1938 | 40.74 | 41.11 | 51.52 | 62.50 | 71.94 | 81.53 | 91.61 | 83.84 | 84.07 | 63.81 | 45.67 | 43.03 | 63.45 | |||||||||||||
1939 | 44.94 | 43.11 | 56.00 | 65.43 | 73.84 | 73.17 | 87.77 | 89.55 | 79.67 | 66.42 | 54.97 | 45.03 | a | 64.99 | ||||||||||||
1940 | 36.52 | 46.07 | 58.90 | 61.37 | 74.10 | 83.90 | a | 85.58 | 87.32 | 78.93 | a | 65.87 | 42.69 | a | 40.21 | c | 63.45 | |||||||||
1941 | 37.35 | 47.93 | 60.74 | 64.76 | a | 68.97 | 76.62 | a | 92.00 | 85.77 | a | 71.07 | 62.03 | 51.70 | 43.48 | 63.54 | ||||||||||
1942 | 28.06 | 44.11 | 55.06 | 63.20 | 66.75 | c | 74.17 | a | 87.90 | 88.90 | a | 81.37 | 67.74 | 43.67 | 43.03 | 62.00 | ||||||||||
1943 | 31.19 | 43.39 | 51.94 | 63.59 | a | 65.16 | 72.77 | 86.68 | 81.26 | 83.23 | 64.33 | a | 45.87 | 37.16 | 60.55 | |||||||||||
1944 | 38.42 | 44.31 | 53.90 | 61.14 | a | 70.50 | a | 75.07 | b | 85.65 | 83.80 | a | 81.33 | 71.32 | 46.17 | 34.55 | 62.18 | |||||||||
1945 | 41.42 | 47.29 | 50.81 | 58.80 | 70.55 | 76.10 | a | 89.48 | 88.26 | 75.07 | 68.10 | a | 46.37 | 37.58 | 62.48 | |||||||||||
1946 | 43.97 | 46.96 | 52.94 | 63.59 | a | 73.97 | b | 75.10 | 84.87 | 86.71 | 74.13 | 56.13 | 45.93 | 44.00 | 62.36 | |||||||||||
1947 | 39.61 | 49.89 | 59.52 | 64.93 | 77.71 | 74.07 | a | 83.68 | 82.03 | 78.76 | a | 60.87 | a | 48.27 | 42.77 | 63.51 | ||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.94 | 81.55 | 75.00 | 63.48 | 48.34 | a | 37.03 | 64.72 | f | |||||
1949 | 27.26 | 41.11 | 52.81 | 65.86 | b | 73.45 | 78.00 | 83.84 | 83.61 | 80.23 | 61.52 | 55.50 | 43.68 | 62.24 | ||||||||||||
1950 | 24.03 | 39.00 | 50.43 | a | 58.40 | 69.47 | a | 74.97 | 86.39 | 87.58 | 80.50 | 58.90 | 48.81 | d | 42.87 | 60.11 | ||||||||||
1951 | 39.16 | 44.67 | a | 48.58 | 65.87 | 72.61 | 81.47 | 88.42 | 85.77 | 80.67 | 60.16 | 47.57 | 38.97 | b | 62.83 | |||||||||||
1952 | 33.32 | 46.62 | e | 52.19 | 66.20 | 73.29 | 76.73 | 90.21 | b | 86.19 | 82.46 | f | 73.97 | b | 42.79 | a | 40.27 | a | 61.98 | a | ||||||
1953 | 51.86 | c | 49.21 | 54.74 | 60.34 | a | 66.50 | a | 71.32 | b | 88.14 | b | 85.53 | a | 80.18 | h | 68.90 | a | 53.08 | d | 47.58 | 63.38 | a | |||
1954 | 40.27 | a | 44.33 | a | 51.58 | g | 60.96 | f | 64.72 | b | 64.25 | f | 73.91 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.77 | i |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | 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 |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.21 | 43.28 | 53.87 | 62.64 | 70.34 | 76.95 | 86.40 | 85.05 | 75.99 | 64.02 | 48.28 | 40.47 | 61.97 | |||||||||||||
S.D. | 6.73 | 4.70 | 3.76 | 3.84 | 3.63 | 3.40 | 2.75 | 2.86 | 4.12 | 4.00 | 3.36 | 4.71 | 1.45 | |||||||||||||
SKEW | -0.53 | -0.65 | 0.55 | 0.02 | 0.17 | 0.75 | -0.14 | -0.36 | -0.11 | 0.29 | 0.06 | -0.30 | -0.08 | |||||||||||||
MAX | 51.86 | 50.93 | 62.13 | 71.85 | 79.03 | 85.00 | 92.00 | 90.81 | 84.07 | 73.97 | 55.50 | 50.94 | 64.99 | |||||||||||||
MIN | 21.44 | 29.69 | 46.80 | 55.57 | 63.71 | 71.32 | 79.13 | 78.07 | 66.50 | 56.13 | 42.10 | 27.97 | 59.16 | |||||||||||||
YRS | 42 | 40 | 41 | 42 | 43 | 41 | 43 | 44 | 42 | 43 | 43 | 39 | 30 |