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 | 84.00 | p | 82.00 | 60.00 | ----- | z | ||
1953 | 70.00 | ----- | z | ----- | z | 94.00 | 86.00 | a | 101.00 | 106.00 | 104.00 | 107.00 | 94.00 | 80.00 | 68.00 | ----- | z | |||||||||
1954 | 66.00 | 75.00 | 74.00 | 95.00 | 99.00 | 108.00 | 109.00 | 101.00 | 98.00 | 89.00 | 76.00 | 61.00 | 109.00 | |||||||||||||
1955 | 63.00 | a | 66.00 | 81.00 | 82.00 | 99.00 | 109.00 | 104.00 | 108.00 | 109.00 | 94.00 | 89.00 | 68.00 | 109.00 | a | |||||||||||
1956 | 63.00 | 64.00 | 78.00 | 88.00 | 94.00 | 108.00 | 109.00 | 102.00 | 99.00 | 97.00 | 78.00 | 72.00 | 109.00 | |||||||||||||
1957 | 63.00 | 78.00 | c | 77.00 | e | 93.00 | 98.00 | 110.00 | 106.00 | l | 105.00 | 109.00 | 79.00 | 75.00 | 68.00 | 110.00 | t | |||||||||
1958 | 65.00 | 70.00 | 66.00 | 89.00 | 98.00 | 103.00 | 106.00 | 108.00 | 106.00 | 98.00 | 84.00 | 76.00 | 108.00 | |||||||||||||
1959 | 64.00 | 73.00 | 79.00 | 89.00 | 93.00 | 108.00 | 109.00 | 109.00 | 100.00 | 93.00 | 84.00 | 72.00 | 109.00 | |||||||||||||
1960 | 62.00 | 65.00 | 84.00 | 88.00 | 98.00 | 108.00 | 111.00 | 106.00 | 102.00 | 89.00 | 82.00 | 62.00 | 111.00 | |||||||||||||
1961 | 60.00 | 70.00 | 83.00 | 90.00 | 89.00 | 112.00 | 112.00 | 105.00 | 98.00 | 99.00 | 79.00 | 64.00 | 112.00 | |||||||||||||
1962 | 83.00 | 70.00 | 76.00 | 89.00 | 92.00 | 103.00 | 103.00 | 100.00 | 100.00 | 92.00 | 85.00 | 70.00 | 103.00 | |||||||||||||
1963 | 70.00 | 74.00 | 74.00 | 78.00 | 95.00 | 103.00 | 102.00 | 100.00 | 100.00 | 96.00 | 74.00 | 58.00 | a | 103.00 | a | |||||||||||
1964 | 65.00 | 75.00 | 81.00 | 91.00 | 92.00 | 106.00 | ----- | z | ----- | z | 96.00 | 95.00 | ----- | z | 72.00 | ----- | z | |||||||||
1965 | 62.00 | 73.00 | 88.00 | 91.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||
1966 | 66.00 | 63.00 | 87.00 | 90.00 | 96.00 | 107.00 | 103.00 | 107.00 | 100.00 | 92.00 | 91.00 | 61.00 | 107.00 | |||||||||||||
1967 | 66.00 | 72.00 | 71.00 | 70.00 | a | 101.00 | j | 105.00 | 107.00 | 108.00 | 102.00 | 88.00 | i | 90.00 | 76.00 | 108.00 | t | |||||||||
1968 | 74.00 | e | 70.00 | h | 81.00 | t | 91.00 | 97.00 | 105.00 | 106.00 | 103.00 | 99.00 | 87.00 | 73.00 | 58.00 | g | ----- | z | ||||||||
1969 | 63.00 | j | 59.00 | 80.00 | 86.00 | 98.00 | 99.00 | 105.00 | 103.00 | 104.00 | 92.00 | 83.00 | 67.00 | 105.00 | j | |||||||||||
1970 | 71.00 | h | 77.00 | 84.00 | 81.00 | 100.00 | 106.00 | 107.00 | 104.00 | 98.00 | 98.00 | 78.00 | 60.00 | 107.00 | h | |||||||||||
1971 | 69.00 | 78.00 | 78.00 | 83.00 | 89.00 | 100.00 | 105.00 | 114.00 | 104.00 | 98.00 | 76.00 | 62.00 | 114.00 | |||||||||||||
1972 | 67.00 | 70.00 | a | 87.00 | 88.00 | 100.00 | 105.00 | 113.00 | 109.00 | 99.00 | ----- | z | 70.00 | d | 67.00 | ----- | z | |||||||||
1973 | 60.00 | 71.00 | 68.00 | a | 90.00 | a | 101.00 | j | 105.00 | h | 107.00 | 101.00 | b | 92.00 | l | ----- | z | 77.00 | 64.00 | ----- | z | |||||
1974 | 68.00 | 68.00 | b | 79.00 | 84.00 | 99.00 | 107.00 | 105.00 | 101.00 | 97.00 | 94.00 | 73.00 | 63.00 | a | 107.00 | c | ||||||||||
1975 | 59.00 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.00 | r | 103.00 | c | ----- | z | ----- | z | 74.00 | ----- | z | |
1976 | 71.00 | 77.00 | 80.00 | a | 85.00 | 102.00 | 107.00 | 105.00 | 104.00 | 104.00 | 93.00 | 85.00 | 70.00 | 107.00 | a | |||||||||||
1977 | 64.00 | 83.00 | 78.00 | 87.00 | a | 93.00 | 110.00 | 110.00 | 108.00 | 103.00 | 90.00 | 77.00 | 74.00 | 110.00 | a | |||||||||||
1978 | 64.00 | 72.00 | 81.00 | 83.00 | 95.00 | 107.00 | 108.00 | 115.00 | 97.00 | 97.00 | 81.00 | 64.00 | 115.00 | |||||||||||||
1979 | 61.00 | 66.00 | 77.00 | 78.00 | 98.00 | 103.00 | 107.00 | 104.00 | ----- | z | 97.00 | 69.00 | ----- | z | ----- | z | ||||||||||
1980 | 70.00 | 67.00 | 75.00 | a | 86.00 | 99.00 | 100.00 | 110.00 | 105.00 | 96.00 | 100.00 | 82.00 | 68.00 | 110.00 | a | |||||||||||
1981 | 66.00 | 73.00 | 77.00 | 97.00 | 98.00 | 105.00 | a | 105.00 | 111.00 | 100.00 | f | 83.00 | h | 82.00 | 69.00 | 111.00 | o | |||||||||
1982 | 63.00 | 71.00 | 72.00 | a | 84.00 | 101.00 | 103.00 | 102.00 | b | 103.00 | 100.00 | 88.00 | 75.00 | 66.00 | 103.00 | c | ||||||||||
1983 | 66.00 | 66.00 | 70.00 | 79.00 | 100.00 | 100.00 | 107.00 | 106.00 | 102.00 | 87.00 | 72.00 | 65.00 | d | 107.00 | d | |||||||||||
1984 | 74.00 | 70.00 | 83.00 | 90.00 | ----- | z | 101.00 | 113.00 | 106.00 | a | 107.00 | 87.00 | 73.00 | a | 68.00 | ----- | z | |||||||||
1985 | 61.00 | ----- | z | 80.00 | 94.00 | 93.00 | 109.00 | 110.00 | 100.00 | 96.00 | f | 99.00 | 82.00 | 69.00 | ----- | z | ||||||||||
1986 | 67.00 | 80.00 | c | 83.00 | 90.00 | 98.00 | 106.00 | 101.00 | 103.00 | 102.00 | ----- | z | ----- | z | ----- | z | ----- | z | ||||||||
1987 | 65.00 | c | 70.00 | s | 79.00 | h | ----- | z | 102.00 | 107.00 | ----- | z | ----- | z | ----- | z | ----- | z | 76.00 | ----- | z | ----- | z | |||
1988 | ----- | z | 70.00 | ----- | z | ----- | z | ----- | z | ----- | z | 101.00 | d | ----- | z | 99.00 | b | 86.00 | g | ----- | 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 |
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 | 66.19 | 71.16 | 78.42 | 87.06 | 96.37 | 105.34 | 106.71 | 105.26 | 101.33 | 93.11 | 79.16 | 67.03 | 108.50 | |||||||||||||
S.D. | 4.78 | 5.32 | 5.43 | 5.70 | 4.02 | 3.36 | 3.35 | 3.84 | 3.67 | 4.93 | 5.63 | 4.88 | 3.40 | |||||||||||||
SKEW | 1.48 | 0.02 | -0.36 | -0.83 | -0.81 | -0.22 | 0.13 | 0.73 | 0.56 | -0.82 | 0.26 | 0.08 | -0.01 | |||||||||||||
MAX | 83.00 | 83.00 | 88.00 | 97.00 | 102.00 | 112.00 | 113.00 | 115.00 | 109.00 | 100.00 | 91.00 | 76.00 | 115.00 | |||||||||||||
MIN | 60.00 | 59.00 | 66.00 | 70.00 | 86.00 | 99.00 | 101.00 | 100.00 | 96.00 | 79.00 | 69.00 | 58.00 | 103.00 | |||||||||||||
YRS | 32 | 31 | 31 | 33 | 30 | 32 | 31 | 31 | 30 | 27 | 32 | 31 | 18 |