YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 74.00 | m | 75.00 | ----- | z | |
1962 | 71.00 | 87.00 | 86.00 | 88.00 | 103.00 | 96.00 | 99.00 | 100.00 | 98.00 | 93.00 | 82.00 | 74.00 | 103.00 | |||||||||||||
1963 | 75.00 | 85.00 | 91.00 | 93.00 | 101.00 | 99.00 | 103.00 | 102.00 | 95.00 | 95.00 | 79.00 | 68.00 | 103.00 | |||||||||||||
1964 | 74.00 | 63.00 | 82.00 | 91.00 | 97.00 | 101.00 | 105.00 | 109.00 | 99.00 | 90.00 | 79.00 | 74.00 | 109.00 | |||||||||||||
1965 | 75.00 | 78.00 | 80.00 | 96.00 | 97.00 | 97.00 | 99.00 | 102.00 | 100.00 | 95.00 | 82.00 | 77.00 | 102.00 | |||||||||||||
1966 | 65.00 | 61.00 | 86.00 | 86.00 | 96.00 | 96.00 | 99.00 | 101.00 | 90.00 | 86.00 | 83.00 | 72.00 | 101.00 | |||||||||||||
1967 | 78.00 | 79.00 | 87.00 | 89.00 | 93.00 | 94.00 | 98.00 | 99.00 | 95.00 | 93.00 | 80.00 | 69.00 | 99.00 | |||||||||||||
1968 | 69.00 | 70.00 | 85.00 | 82.00 | 91.00 | 103.00 | 98.00 | 96.00 | 94.00 | 93.00 | 75.00 | 72.00 | 103.00 | |||||||||||||
1969 | 73.00 | 75.00 | 75.00 | 87.00 | 93.00 | 98.00 | 100.00 | 102.00 | 91.00 | 88.00 | 78.00 | 72.00 | 102.00 | |||||||||||||
1970 | 76.00 | 84.00 | 78.00 | 86.00 | 93.00 | 104.00 | 103.00 | 99.00 | 99.00 | 88.00 | 81.00 | 78.00 | 104.00 | |||||||||||||
1971 | 74.00 | 71.00 | 92.00 | 94.00 | 93.00 | 98.00 | 101.00 | 94.00 | 97.00 | 85.00 | 79.00 | 75.00 | 101.00 | |||||||||||||
1972 | 77.00 | 83.00 | 86.00 | 93.00 | 88.00 | 97.00 | 97.00 | 99.00 | 98.00 | 90.00 | ----- | z | ----- | z | ----- | z | ||||||||||
1973 | ----- | z | ----- | z | 76.00 | 85.00 | 93.00 | 102.00 | 102.00 | 102.00 | 95.00 | 93.00 | 82.00 | 76.00 | ----- | z | ||||||||||
1974 | 77.00 | 77.00 | 86.00 | 90.00 | 99.00 | 99.00 | 104.00 | 98.00 | 93.00 | 86.00 | 77.00 | 68.00 | 104.00 | |||||||||||||
1975 | 77.00 | 75.00 | 83.00 | 85.00 | 89.00 | 98.00 | 96.00 | 100.00 | 94.00 | 91.00 | 83.00 | 74.00 | 100.00 | |||||||||||||
1976 | 70.00 | 81.00 | 85.00 | 87.00 | 97.00 | 100.00 | 100.00 | 100.00 | 95.00 | 87.00 | 79.00 | 70.00 | 100.00 | |||||||||||||
1977 | 59.00 | 78.00 | 80.00 | 86.00 | 90.00 | 101.00 | 103.00 | 100.00 | 97.00 | 90.00 | 79.00 | 76.00 | 103.00 | |||||||||||||
1978 | 66.00 | 69.00 | 88.00 | 89.00 | 98.00 | 102.00 | 107.00 | 102.00 | 101.00 | 88.00 | 78.00 | 71.00 | a | 107.00 | a | |||||||||||
1979 | 61.00 | 84.00 | 79.00 | 87.00 | 94.00 | 100.00 | 100.00 | 94.00 | a | 97.00 | 97.00 | 70.00 | a | 72.00 | 100.00 | b | ||||||||||
1980 | 74.00 | 80.00 | 78.00 | 88.00 | 89.00 | 107.00 | 105.00 | 103.00 | 100.00 | 88.00 | 88.00 | 77.00 | 107.00 | |||||||||||||
1981 | 75.00 | 84.00 | 83.00 | 92.00 | 91.00 | a | 108.00 | 103.00 | 98.00 | 95.00 | 87.00 | 77.00 | 72.00 | 108.00 | a | |||||||||||
1982 | 70.00 | 81.00 | 79.00 | 89.00 | 92.00 | 99.00 | 101.00 | 101.00 | 101.00 | d | 88.00 | c | 75.00 | b | 74.00 | c | 101.00 | l | ||||||||
1983 | 71.00 | a | 71.00 | c | 83.00 | 84.00 | c | 90.00 | d | 100.00 | c | 103.00 | b | 102.00 | b | 101.00 | a | 88.00 | d | 79.00 | f | 66.00 | d | ----- | z | |
1984 | 72.00 | e | 77.00 | g | 85.00 | h | 85.00 | c | 98.00 | c | 98.00 | 98.00 | a | 103.00 | 100.00 | g | 86.00 | f | 79.00 | d | 73.00 | c | ----- | z | ||
1985 | 61.00 | g | 70.00 | e | 81.00 | h | 86.00 | e | 98.00 | g | 99.00 | e | 102.00 | b | 102.00 | a | 97.00 | 88.00 | 77.00 | 65.00 | ----- | z | ||||
1986 | 80.00 | 79.00 | 86.00 | 91.00 | a | 94.00 | a | 98.00 | a | 103.00 | 100.00 | 91.00 | a | 82.00 | 74.00 | 62.00 | 103.00 | d | ||||||||
1987 | 66.00 | 71.00 | 74.00 | 95.00 | 90.00 | 99.00 | 95.00 | 99.00 | a | 91.00 | 92.00 | a | 80.00 | 74.00 | 99.00 | b | ||||||||||
1988 | 70.00 | 74.00 | 82.00 | 83.00 | 92.00 | a | 99.00 | 98.00 | 97.00 | 92.00 | 89.00 | 81.00 | 67.00 | 99.00 | a | |||||||||||
1989 | 76.00 | 78.00 | 92.00 | 98.00 | 98.00 | 94.00 | 100.00 | 101.00 | 96.00 | 93.00 | 82.00 | 70.00 | a | 101.00 | a | |||||||||||
1990 | 74.00 | 79.00 | 81.00 | 87.00 | 96.00 | 106.00 | 98.00 | 101.00 | 98.00 | a | 86.00 | 82.00 | 68.00 | a | 106.00 | b | ||||||||||
1991 | 64.00 | 75.00 | a | 84.00 | a | 88.00 | 96.00 | 95.00 | a | 99.00 | 95.00 | a | 93.00 | a | 92.00 | 71.00 | 70.00 | 99.00 | e | |||||||
1992 | 64.00 | d | 74.00 | 78.00 | a | 90.00 | b | 95.00 | 95.00 | 101.00 | 98.00 | a | 93.00 | 91.00 | a | 76.00 | 70.00 | 101.00 | i | |||||||
1993 | 63.00 | 72.00 | b | 79.00 | 88.00 | 89.00 | a | 98.00 | 100.00 | a | 96.00 | a | 94.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ||||
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | 89.00 | 88.00 | a | 99.00 | 100.00 | 97.00 | 103.00 | 85.00 | 82.00 | 76.00 | ----- | z | ||||||||
1996 | 72.00 | 85.00 | 82.00 | 93.00 | 102.00 | 101.00 | b | 105.00 | 94.00 | f | 91.00 | 86.00 | 83.00 | 78.00 | 105.00 | h | ||||||||||
1997 | 79.00 | 72.00 | 83.00 | 83.00 | a | 90.00 | 100.00 | 103.00 | 99.00 | 98.00 | 92.00 | 80.00 | 69.00 | 103.00 | a | |||||||||||
1998 | 67.00 | 75.00 | 85.00 | 92.00 | 102.00 | 107.00 | 102.00 | 100.00 | 101.00 | 91.00 | 82.00 | 71.00 | 107.00 | |||||||||||||
1999 | 74.00 | b | 79.00 | e | 77.00 | a | 87.00 | 89.00 | 98.00 | 101.00 | 101.00 | 95.00 | 89.00 | 83.00 | 69.00 | 101.00 | h | |||||||||
2000 | 73.00 | a | 79.00 | 79.00 | 91.00 | 102.00 | 94.00 | 99.00 | a | 101.00 | 103.00 | 98.00 | 70.00 | 70.00 | 103.00 | b | ||||||||||
2001 | 57.00 | 73.00 | 82.00 | 88.00 | 91.00 | 101.00 | 104.00 | 100.00 | 96.00 | 90.00 | 85.00 | 71.00 | 104.00 | |||||||||||||
2002 | 76.00 | 81.00 | 89.00 | 93.00 | 95.00 | 98.00 | 103.00 | a | 100.00 | 93.00 | 88.00 | 76.00 | 66.00 | 103.00 | a | |||||||||||
2003 | 74.00 | 79.00 | 82.00 | a | 91.00 | 98.00 | 92.00 | 105.00 | 106.00 | 92.00 | 91.00 | 82.00 | 77.00 | 106.00 | a | |||||||||||
2004 | 70.00 | 81.00 | 88.00 | 83.00 | a | 100.00 | b | 100.00 | 101.00 | 101.00 | 99.00 | 83.00 | a | 78.00 | a | 68.00 | a | 101.00 | f | |||||||
2005 | 73.00 | 73.00 | 82.00 | 87.00 | 98.00 | 97.00 | 103.00 | 101.00 | 100.00 | 96.00 | 86.00 | 75.00 | 103.00 | |||||||||||||
2006 | 83.00 | 79.00 | 89.00 | 101.00 | 104.00 | 106.00 | 108.00 | 105.00 | 92.00 | 96.00 | 88.00 | 73.00 | 108.00 | |||||||||||||
2007 | 69.00 | 75.00 | 86.00 | 81.00 | 86.00 | 96.00 | f | 100.00 | d | 105.00 | 105.00 | 98.00 | b | 85.00 | 75.00 | a | 105.00 | m | ||||||||
2008 | 72.00 | 74.00 | 82.00 | c | 93.00 | 102.00 | 111.00 | 104.00 | 103.00 | a | 93.00 | a | 92.00 | 82.00 | b | 73.00 | a | 111.00 | h | |||||||
2009 | 73.00 | 82.00 | a | 87.00 | b | 90.00 | f | 97.00 | 100.00 | 110.00 | 102.00 | 98.00 | 98.00 | 86.00 | 68.00 | a | 110.00 | j | ||||||||
2010 | 71.00 | 62.00 | 88.00 | 92.00 | a | 96.00 | f | 101.00 | 96.00 | b | 104.00 | 105.00 | 88.00 | 81.00 | 75.00 | b | 105.00 | k | ||||||||
2011 | 72.00 | a | 80.00 | 90.00 | a | 95.00 | 106.00 | 112.00 | 109.00 | b | 108.00 | 107.00 | b | 92.00 | l | 81.00 | 67.00 | a | 112.00 | s | ||||||
2012 | 71.00 | b | 74.00 | 87.00 | e | 98.00 | c | 102.00 | 107.00 | a | 106.00 | a | 110.00 | a | 101.00 | 91.00 | 83.00 | a | 76.00 | a | 110.00 | o | ||||
2013 | 73.00 | e | 72.00 | b | 84.00 | e | 95.00 | b | 100.00 | d | 104.00 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | 79.00 | h | 80.00 | 88.00 | 96.00 | 98.00 | 99.00 | b | 101.00 | 95.00 | 88.00 | 91.00 | 69.00 | a | ----- | z | ||||||||
2015 | 72.00 | b | 82.00 | a | 88.00 | a | 89.00 | a | 84.00 | 92.00 | c | 97.00 | 98.00 | h | 96.00 | c | 90.00 | d | 79.00 | k | 71.00 | d | ----- | z | ||
2016 | 77.00 | b | 84.00 | c | 83.00 | 84.00 | c | 89.00 | b | 99.00 | c | 103.00 | d | 99.00 | 91.00 | e | 95.00 | i | 82.00 | c | 72.00 | d | ----- | z | ||
2017 | 75.00 | e | 88.00 | c | 90.00 | a | 88.00 | d | 95.00 | c | 105.00 | b | 100.00 | a | 91.00 | d | 95.00 | b | 83.00 | v | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 71.75 | 76.80 | 83.60 | 89.24 | 94.92 | 100.04 | 101.44 | 100.56 | 96.58 | 90.24 | 80.29 | 71.73 | 103.26 | |||||||||||||
S.D. | 5.27 | 6.09 | 4.43 | 4.33 | 5.09 | 4.38 | 3.29 | 3.56 | 4.07 | 3.85 | 4.33 | 3.67 | 2.84 | |||||||||||||
SKEW | -0.74 | -0.54 | -0.08 | 0.45 | 0.10 | 0.68 | 0.42 | 0.15 | 0.49 | 0.26 | -0.25 | -0.28 | 0.34 | |||||||||||||
MAX | 83.00 | 88.00 | 92.00 | 101.00 | 106.00 | 112.00 | 110.00 | 110.00 | 107.00 | 98.00 | 91.00 | 78.00 | 109.00 | |||||||||||||
MIN | 57.00 | 61.00 | 74.00 | 81.00 | 84.00 | 92.00 | 95.00 | 91.00 | 90.00 | 82.00 | 70.00 | 62.00 | 99.00 | |||||||||||||
YRS | 51 | 51 | 52 | 54 | 53 | 54 | 54 | 52 | 53 | 49 | 49 | 52 | 31 |