YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 89.00 | f | 97.00 | 102.00 | 101.00 | 101.00 | 91.00 | 88.00 | 71.00 | a | 70.00 | ----- | z | |||||||
1962 | 67.00 | 78.00 | 78.00 | 92.00 | 95.00 | 101.00 | 99.00 | 100.00 | 96.00 | 87.00 | 78.00 | 66.00 | 101.00 | |||||||||||||
1963 | 72.00 | 77.00 | 83.00 | 90.00 | 95.00 | 104.00 | 106.00 | 95.00 | 95.00 | 89.00 | 77.00 | 66.00 | 106.00 | |||||||||||||
1964 | 65.00 | 67.00 | 79.00 | 87.00 | 98.00 | 100.00 | 105.00 | 102.00 | 96.00 | 86.00 | 76.00 | 70.00 | 105.00 | |||||||||||||
1965 | 69.00 | 71.00 | 76.00 | 93.00 | 95.00 | 100.00 | 102.00 | 101.00 | 91.00 | 92.00 | 77.00 | 69.00 | 102.00 | |||||||||||||
1966 | 67.00 | 69.00 | 80.00 | 86.00 | 95.00 | 100.00 | 102.00 | 99.00 | 92.00 | 87.00 | 80.00 | 71.00 | 102.00 | |||||||||||||
1967 | 74.00 | 75.00 | 85.00 | 88.00 | 95.00 | 100.00 | 100.00 | 97.00 | 93.00 | 89.00 | 77.00 | 63.00 | 100.00 | |||||||||||||
1968 | 68.00 | 76.00 | 82.00 | 82.00 | 96.00 | 104.00 | 100.00 | 94.00 | 95.00 | 89.00 | 76.00 | 69.00 | 104.00 | |||||||||||||
1969 | 74.00 | 73.00 | 86.00 | 90.00 | 97.00 | 103.00 | 102.00 | 101.00 | 93.00 | 90.00 | 77.00 | 71.00 | 103.00 | |||||||||||||
1970 | 77.00 | 76.00 | 77.00 | 84.00 | 97.00 | 105.00 | 101.00 | 98.00 | 97.00 | 83.00 | 80.00 | 74.00 | 105.00 | |||||||||||||
1971 | 80.00 | 76.00 | 88.00 | 91.00 | 92.00 | 103.00 | 102.00 | 97.00 | 98.00 | 85.00 | 77.00 | 72.00 | 103.00 | |||||||||||||
1972 | 73.00 | 81.00 | 85.00 | 92.00 | 92.00 | 102.00 | a | 105.00 | 101.00 | 92.00 | 93.00 | 74.00 | 68.00 | 105.00 | a | |||||||||||
1973 | 66.00 | 73.00 | 73.00 | 87.00 | 95.00 | 108.00 | 106.00 | 99.00 | 96.00 | 92.00 | 84.00 | 72.00 | 108.00 | |||||||||||||
1974 | 74.00 | 77.00 | 85.00 | 92.00 | 100.00 | 107.00 | 100.00 | 98.00 | 99.00 | 90.00 | 74.00 | 67.00 | 107.00 | |||||||||||||
1975 | 75.00 | 75.00 | 80.00 | 87.00 | 94.00 | 101.00 | 100.00 | 98.00 | 97.00 | 91.00 | 83.00 | 75.00 | 101.00 | |||||||||||||
1976 | 74.00 | 80.00 | 81.00 | 86.00 | 93.00 | 102.00 | 102.00 | 98.00 | 93.00 | 82.00 | 74.00 | 62.00 | 102.00 | |||||||||||||
1977 | 64.00 | 77.00 | 74.00 | 86.00 | 94.00 | 104.00 | 102.00 | 102.00 | 96.00 | 90.00 | 79.00 | 72.00 | 104.00 | |||||||||||||
1978 | 70.00 | 71.00 | 86.00 | 90.00 | 96.00 | 104.00 | 106.00 | 99.00 | 95.00 | 91.00 | 75.00 | 68.00 | 106.00 | |||||||||||||
1979 | 61.00 | 76.00 | 79.00 | 88.00 | 94.00 | 102.00 | 109.00 | 100.00 | 102.00 | 95.00 | 77.00 | 73.00 | 109.00 | |||||||||||||
1980 | 72.00 | 78.00 | 77.00 | 88.00 | 92.00 | 107.00 | 103.00 | 103.00 | 96.00 | 93.00 | 83.00 | 76.00 | 107.00 | |||||||||||||
1981 | 68.00 | 77.00 | 82.00 | 92.00 | 92.00 | 107.00 | 104.00 | 100.00 | 95.00 | 85.00 | ----- | z | ----- | z | ----- | z | ||||||||||
1982 | ----- | z | ----- | z | 81.00 | ----- | 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 | 100.00 | 100.00 | 95.00 | 71.00 | a | 66.00 | ----- | z | ||||
2001 | 64.00 | 76.00 | 83.00 | 87.00 | 99.00 | 102.00 | 103.00 | 100.00 | 96.00 | 86.00 | 81.00 | 70.00 | 103.00 | |||||||||||||
2002 | 71.00 | 76.00 | 83.00 | 91.00 | 103.00 | 107.00 | 106.00 | 102.00 | 97.00 | 88.00 | 75.00 | 65.00 | 107.00 | |||||||||||||
2003 | 72.00 | 75.00 | 79.00 | 85.00 | 98.00 | 101.00 | 106.00 | 104.00 | 94.00 | 91.00 | 81.00 | f | 70.00 | 106.00 | f | |||||||||||
2004 | 66.00 | 76.00 | 86.00 | 82.00 | a | 97.00 | 101.00 | 103.00 | 100.00 | 97.00 | 87.00 | 77.00 | 71.00 | 103.00 | a | |||||||||||
2005 | 72.00 | 67.00 | 78.00 | 85.00 | 104.00 | 106.00 | a | 106.00 | 99.00 | 97.00 | 90.00 | 83.00 | 75.00 | 106.00 | a | |||||||||||
2006 | 71.00 | 81.00 | 81.00 | 91.00 | 98.00 | 105.00 | 103.00 | 96.00 | 92.00 | 89.00 | 81.00 | 71.00 | 105.00 | |||||||||||||
2007 | 64.00 | 74.00 | 86.00 | 87.00 | 93.00 | 105.00 | 105.00 | 103.00 | 94.00 | 90.00 | 81.00 | 74.00 | 105.00 | |||||||||||||
2008 | 68.00 | 78.00 | b | 81.00 | 87.00 | 101.00 | 105.00 | 97.00 | 95.00 | 91.00 | 87.00 | 80.00 | 72.00 | 105.00 | b | |||||||||||
2009 | 70.00 | 82.00 | 83.00 | 88.00 | 96.00 | a | 97.00 | 106.00 | 102.00 | 93.00 | 85.00 | 79.00 | 62.00 | 106.00 | a | |||||||||||
2010 | 64.00 | a | 68.00 | 82.00 | 84.00 | 97.00 | 107.00 | b | 104.00 | 101.00 | 99.00 | 91.00 | 78.00 | b | 72.00 | 107.00 | e | |||||||||
2011 | 74.00 | 77.00 | 86.00 | 91.00 | 96.00 | 107.00 | 103.00 | 103.00 | 99.00 | 89.00 | 82.00 | 72.00 | a | 107.00 | a | |||||||||||
2012 | 70.00 | 73.00 | a | 84.00 | 94.00 | 98.00 | 106.00 | 100.00 | a | 101.00 | 99.00 | 91.00 | 81.00 | a | 76.00 | 106.00 | c | |||||||||
2013 | 70.00 | 70.00 | 85.00 | 90.00 | 95.00 | 107.00 | 102.00 | b | 98.00 | 95.00 | 87.00 | 77.00 | 70.00 | 107.00 | b | |||||||||||
2014 | 71.00 | 82.00 | 82.00 | a | 89.00 | 99.00 | 105.00 | 104.00 | 98.00 | 100.00 | 87.00 | 76.00 | 72.00 | 105.00 | a | |||||||||||
2015 | 71.00 | 76.00 | 87.00 | 84.00 | 93.00 | 106.00 | 101.00 | 102.00 | 96.00 | 94.00 | a | 76.00 | 73.00 | 106.00 | a | |||||||||||
2016 | 71.00 | 81.00 | 82.00 | 87.00 | 93.00 | 105.00 | b | 106.00 | 100.00 | 96.00 | a | 89.00 | 77.00 | 75.00 | 106.00 | c | ||||||||||
2017 | 67.00 | 82.00 | 88.00 | 88.00 | 95.00 | 108.00 | 104.00 | 96.00 | 99.00 | a | 92.00 | 83.00 | 73.00 | 108.00 | a | |||||||||||
2018 | 73.00 | 75.00 | 85.00 | 91.00 | 99.00 | 105.00 | 105.00 | 102.00 | 96.00 | 89.00 | 76.00 | 69.00 | 105.00 | |||||||||||||
2019 | 71.00 | 74.00 | 83.00 | 91.00 | 93.00 | 100.00 | a | 104.00 | 102.00 | 98.00 | 86.00 | 80.00 | 67.00 | 104.00 | a | |||||||||||
2020 | 68.00 | b | 74.00 | 80.00 | 93.00 | 100.00 | 106.00 | 109.00 | a | 106.00 | d | 101.00 | c | 94.00 | a | 83.00 | 69.00 | 109.00 | k | |||||||
2021 | 72.00 | 75.00 | 81.00 | 89.00 | 96.00 | 108.00 | 101.00 | 101.00 | 97.00 | 88.00 | 81.00 | 73.00 | 108.00 | |||||||||||||
2022 | 70.00 | 74.00 | 84.00 | 90.00 | 100.00 | 107.00 | 107.00 | 101.00 | 93.00 | 84.00 | 77.00 | 72.00 | 107.00 | |||||||||||||
2023 | 68.00 | 74.00 | 79.00 | 92.00 | 94.00 | 107.00 | 108.00 | 108.00 | 103.00 | 91.00 | 84.00 | 72.00 | 108.00 | |||||||||||||
2024 | 69.00 | 80.00 | 79.00 | 85.00 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 69.93 | 75.52 | 81.87 | 88.53 | 96.16 | 104.07 | 103.41 | 100.07 | 96.00 | 89.04 | 78.33 | 70.34 | 105.05 | |||||||||||||
S.D. | 3.82 | 3.84 | 3.56 | 3.03 | 2.92 | 2.81 | 2.72 | 2.79 | 2.95 | 3.10 | 3.33 | 3.51 | 2.21 | |||||||||||||
SKEW | 0.02 | -0.34 | -0.38 | -0.30 | 0.65 | -0.43 | 0.03 | 0.18 | 0.22 | -0.09 | -0.10 | -0.64 | -0.42 | |||||||||||||
MAX | 80.00 | 82.00 | 88.00 | 94.00 | 104.00 | 108.00 | 109.00 | 108.00 | 103.00 | 95.00 | 84.00 | 76.00 | 109.00 | |||||||||||||
MIN | 61.00 | 67.00 | 73.00 | 82.00 | 92.00 | 97.00 | 97.00 | 94.00 | 91.00 | 82.00 | 71.00 | 62.00 | 100.00 | |||||||||||||
YRS | 44 | 44 | 45 | 43 | 44 | 44 | 44 | 45 | 45 | 45 | 43 | 44 | 39 |