YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.13 | p | 65.00 | 51.61 | 58.31 | j | ||
1953 | 59.74 | ----- | z | ----- | z | 75.93 | 77.37 | a | 87.00 | 100.06 | 91.45 | 92.20 | 79.26 | 65.40 | 60.48 | 78.89 | b | |||||||||
1954 | 54.61 | 59.14 | 61.61 | 76.53 | 86.16 | 88.30 | 98.48 | 89.35 | 87.80 | 78.55 | 62.00 | 49.35 | 74.33 | |||||||||||||
1955 | 51.67 | a | 60.36 | 67.68 | 67.03 | 82.97 | 90.63 | 94.61 | 99.03 | 92.27 | 82.03 | 62.90 | 54.84 | 75.50 | ||||||||||||
1956 | 53.23 | 57.14 | 67.23 | 73.07 | 79.90 | 91.67 | 96.19 | 93.26 | 89.80 | 78.52 | 69.80 | 61.13 | 75.91 | |||||||||||||
1957 | 53.94 | 61.28 | c | 66.46 | e | 74.63 | 79.55 | 96.37 | 98.84 | l | 93.81 | 90.73 | 70.55 | 64.23 | 53.90 | 73.22 | a | |||||||||
1958 | 53.32 | 59.86 | 59.81 | 71.07 | 85.97 | 88.97 | 96.71 | 101.90 | 94.50 | 86.48 | 69.93 | 65.19 | 77.81 | |||||||||||||
1959 | 56.65 | 59.68 | 72.06 | 81.37 | 81.52 | 95.00 | 100.87 | 96.23 | 87.33 | 82.97 | 74.27 | 60.52 | 79.04 | |||||||||||||
1960 | 52.68 | 59.69 | 67.39 | 73.77 | 81.35 | 97.50 | 101.32 | 96.71 | 93.57 | 79.19 | 63.40 | 53.94 | 76.71 | |||||||||||||
1961 | 51.06 | 62.82 | 64.10 | 74.93 | 78.26 | 95.53 | 100.90 | 96.39 | 89.40 | 80.26 | 65.70 | 53.97 | 76.11 | |||||||||||||
1962 | 59.84 | 55.96 | 62.16 | 79.77 | 79.19 | 91.00 | 96.94 | 92.58 | 92.63 | 76.06 | 68.23 | 57.10 | 75.96 | |||||||||||||
1963 | 53.39 | 65.64 | 65.42 | 64.63 | 79.19 | 90.90 | 92.45 | 93.84 | 90.00 | 78.52 | 62.50 | 47.07 | a | 73.63 | ||||||||||||
1964 | 54.94 | 65.62 | 66.32 | 74.20 | 81.45 | 86.90 | ----- | z | ----- | z | 87.53 | 82.61 | ----- | z | 58.58 | 73.13 | c | |||||||||
1965 | 52.94 | 62.00 | 67.61 | 69.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.89 | h | ||||
1966 | 55.03 | 58.14 | 67.45 | 80.57 | 85.52 | 90.30 | 93.84 | 97.52 | 88.00 | 81.81 | 64.97 | 52.32 | 76.29 | |||||||||||||
1967 | 54.84 | 61.14 | 62.81 | 59.79 | a | 87.62 | j | 87.27 | 100.03 | 102.16 | 94.67 | 84.32 | i | 72.27 | 60.48 | 75.55 | b | |||||||||
1968 | 52.81 | e | 60.24 | h | 72.64 | t | 76.50 | 81.48 | 93.13 | 97.00 | 89.00 | 89.97 | 77.71 | 61.20 | 52.92 | g | 79.87 | c | ||||||||
1969 | 51.33 | j | 53.75 | 64.81 | 72.17 | 84.94 | 86.63 | 97.71 | 97.94 | 91.87 | 73.90 | 68.90 | 57.32 | 77.27 | a | |||||||||||
1970 | 56.35 | h | 62.82 | 67.58 | 71.30 | 84.71 | 90.03 | 97.81 | 95.32 | 88.87 | 76.68 | 64.37 | 50.81 | 77.30 | a | |||||||||||
1971 | 54.39 | 60.57 | 64.39 | 71.17 | 76.10 | 87.70 | 97.16 | 96.55 | 88.93 | 76.19 | 64.93 | 52.29 | 74.20 | |||||||||||||
1972 | 52.19 | 61.64 | a | 72.68 | 72.00 | 83.06 | 91.80 | 96.42 | 95.23 | 85.23 | ----- | z | 59.08 | d | 49.00 | 74.39 | a | |||||||||
1973 | 51.45 | 59.43 | 61.40 | a | 76.17 | a | 90.62 | j | 92.14 | h | 95.58 | 91.21 | b | 84.11 | l | ----- | z | 59.30 | 53.58 | 68.52 | d | |||||
1974 | 53.42 | 59.88 | b | 63.23 | 70.00 | 82.45 | 91.00 | 93.29 | 94.00 | 90.27 | 80.13 | 62.23 | 51.50 | a | 74.28 | |||||||||||
1975 | 52.62 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 90.08 | r | 93.19 | c | ----- | z | ----- | z | 56.97 | 75.08 | j | |
1976 | 59.06 | 62.38 | 67.07 | a | 70.30 | 80.68 | 87.67 | 95.65 | 87.10 | 87.47 | 81.65 | 66.77 | 62.29 | 75.67 | ||||||||||||
1977 | 51.90 | 65.86 | 64.32 | 79.66 | a | 73.45 | 94.13 | 96.03 | 95.61 | 87.20 | 80.00 | 66.57 | 57.97 | 76.06 | ||||||||||||
1978 | 56.29 | 59.25 | 68.45 | 68.70 | 83.23 | 89.97 | 96.68 | 95.61 | 85.00 | 85.42 | 63.00 | 51.45 | 75.25 | |||||||||||||
1979 | 53.39 | 57.61 | 66.03 | 71.13 | 84.16 | 93.17 | 95.68 | 92.61 | ----- | z | 78.58 | 63.10 | ----- | z | 75.55 | b | ||||||||||
1980 | 56.00 | 60.48 | 65.10 | a | 74.00 | 80.58 | 84.70 | 94.61 | 91.87 | 89.17 | 81.39 | 67.63 | 56.58 | 75.18 | ||||||||||||
1981 | 54.65 | 62.46 | 64.68 | 76.73 | 83.97 | 95.24 | a | 96.94 | 94.68 | 92.50 | f | 73.61 | h | 66.17 | 58.19 | 75.37 | b | |||||||||
1982 | 51.84 | 62.68 | 62.00 | a | 70.87 | 85.94 | 88.33 | 94.07 | b | 91.87 | 85.07 | 76.74 | 58.67 | 53.87 | 73.49 | |||||||||||
1983 | 52.35 | 59.57 | 62.42 | 66.50 | 83.32 | 91.23 | 92.32 | 95.13 | 90.03 | 80.19 | 61.07 | 55.48 | d | 74.14 | ||||||||||||
1984 | 56.65 | 60.10 | 71.97 | 73.90 | ----- | z | 91.27 | 99.13 | 95.73 | a | 93.60 | 74.97 | 60.48 | a | 56.68 | 75.86 | a | |||||||||
1985 | 52.74 | ----- | z | 64.58 | 80.17 | 82.29 | 96.13 | 97.48 | 92.90 | 82.12 | f | 79.32 | 61.87 | 51.55 | 75.90 | b | ||||||||||
1986 | 58.74 | 64.84 | c | 70.52 | 74.87 | 83.29 | 92.43 | 94.35 | 95.97 | 82.27 | ----- | z | ----- | z | ----- | z | 79.70 | c | ||||||||
1987 | 56.14 | c | 64.00 | s | 65.78 | h | ----- | z | 88.23 | 94.70 | ----- | z | ----- | z | ----- | z | ----- | z | 60.07 | ----- | z | 74.78 | h | |||
1988 | ----- | z | 64.10 | ----- | z | ----- | z | ----- | z | ----- | z | 92.22 | d | ----- | z | 78.61 | b | 75.96 | g | ----- | z | ----- | z | 78.31 | i | |
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 |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.43 | 60.84 | 65.78 | 73.10 | 82.01 | 91.14 | 96.53 | 94.60 | 89.24 | 79.25 | 64.56 | 55.36 | 75.53 | |||||||||||||
S.D. | 2.44 | 2.81 | 3.23 | 4.78 | 3.25 | 3.29 | 2.53 | 3.35 | 3.63 | 3.41 | 3.81 | 4.28 | 1.44 | |||||||||||||
SKEW | 0.81 | -0.18 | 0.40 | -0.47 | -0.52 | 0.11 | 0.15 | 0.12 | -0.83 | -0.22 | 0.61 | 0.24 | 0.68 | |||||||||||||
MAX | 59.84 | 65.86 | 72.68 | 81.37 | 88.23 | 97.50 | 101.32 | 102.16 | 94.67 | 86.48 | 74.27 | 65.19 | 79.04 | |||||||||||||
MIN | 51.06 | 53.75 | 59.81 | 59.79 | 73.45 | 84.70 | 92.22 | 87.10 | 78.61 | 70.55 | 58.67 | 47.07 | 73.49 | |||||||||||||
YRS | 32 | 31 | 31 | 33 | 30 | 32 | 31 | 31 | 30 | 27 | 32 | 31 | 18 |