YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 70.00 | a | 85.00 | 84.00 | 100.00 | a | 100.00 | 111.00 | 113.00 | 110.00 | a | 106.00 | 94.00 | 87.00 | 74.00 | 113.00 | c | |||||||||
1931 | 77.00 | 76.00 | 87.00 | 95.00 | 101.00 | 111.00 | 113.00 | 108.00 | 106.00 | 99.00 | 89.00 | 68.00 | 113.00 | |||||||||||||
1932 | 71.00 | 82.00 | 81.00 | 91.00 | 100.00 | 112.00 | 112.00 | 111.00 | 110.00 | 95.00 | 86.00 | 80.00 | 112.00 | |||||||||||||
1933 | 74.00 | 74.00 | 84.00 | 90.00 | 107.00 | 114.00 | 113.00 | 115.00 | 110.00 | 101.00 | 88.00 | 77.00 | 115.00 | |||||||||||||
1934 | 74.00 | 80.00 | 93.00 | 97.00 | 111.00 | 109.00 | 115.00 | 113.00 | 110.00 | 101.00 | 91.00 | 78.00 | 115.00 | |||||||||||||
1935 | 80.00 | 81.00 | 83.00 | 92.00 | 99.00 | 111.00 | 111.00 | 109.00 | 106.00 | 97.00 | 80.00 | 75.00 | 111.00 | |||||||||||||
1936 | 75.00 | a | 77.00 | 89.00 | 99.00 | 108.00 | 115.00 | 114.00 | 112.00 | 108.00 | 99.00 | 86.00 | 77.00 | 115.00 | a | |||||||||||
1937 | 62.00 | 75.00 | 84.00 | 98.00 | 107.00 | 112.00 | 116.00 | 113.00 | 108.00 | 99.00 | 89.00 | 80.00 | 116.00 | |||||||||||||
1938 | 75.00 | a | 78.00 | 81.00 | 98.00 | 107.00 | 111.00 | 111.00 | 114.00 | 106.00 | 100.00 | 80.00 | 83.00 | 114.00 | a | |||||||||||
1939 | 72.00 | 75.00 | 90.00 | 98.00 | 105.00 | 111.00 | 114.00 | 109.00 | 108.00 | 94.00 | 88.00 | 82.00 | 114.00 | |||||||||||||
1940 | 82.00 | 81.00 | 90.00 | 95.00 | 105.00 | 116.00 | 113.00 | 113.00 | 106.00 | 94.00 | a | 82.00 | 80.00 | 116.00 | a | |||||||||||
1941 | 71.00 | 72.00 | a | 80.00 | 88.00 | 102.00 | 109.00 | 111.00 | 109.00 | 104.00 | 95.00 | 89.00 | 79.00 | 111.00 | a | |||||||||||
1942 | 76.00 | 74.00 | 87.00 | 89.00 | 104.00 | 110.00 | 117.00 | a | 107.00 | a | 105.00 | 98.00 | 87.00 | 80.00 | 117.00 | b | ||||||||||
1943 | 77.00 | 84.00 | 91.00 | d | 98.00 | 103.00 | a | 107.00 | a | 115.00 | a | 106.00 | 107.00 | 100.00 | 83.00 | 73.00 | 115.00 | g | ||||||||
1944 | 77.00 | a | 80.00 | 78.00 | 86.00 | 99.00 | 106.00 | 110.00 | a | 112.00 | 108.00 | 98.00 | 86.00 | 77.00 | a | 112.00 | c | |||||||||
1945 | 78.00 | 80.00 | 82.00 | 96.00 | 96.00 | f | 108.00 | a | 112.00 | 109.00 | 112.00 | 94.00 | 86.00 | 73.00 | 112.00 | g | ||||||||||
1946 | 76.00 | 82.00 | 87.00 | 100.00 | 99.00 | 109.00 | 110.00 | a | 112.00 | 108.00 | 88.00 | 80.00 | 78.00 | 112.00 | a | |||||||||||
1947 | 73.00 | 86.00 | 88.00 | 97.00 | 108.00 | 109.00 | o | 114.00 | 109.00 | 113.00 | 102.00 | 87.00 | 76.00 | 114.00 | o | |||||||||||
1948 | 80.00 | 82.00 | h | 80.00 | ----- | 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 | ----- | z | 72.00 | r | ----- | z |
1962 | 77.00 | b | 78.00 | 87.00 | a | 100.00 | a | 103.00 | 113.00 | 111.00 | 115.00 | 110.00 | 99.00 | 89.00 | a | 78.00 | 115.00 | e | ||||||||
1963 | 74.00 | 90.00 | a | 85.00 | 96.00 | a | 105.00 | 109.00 | 112.00 | b | 109.00 | 106.00 | w | 100.00 | a | 89.00 | 75.00 | ----- | z | |||||||
1964 | 74.00 | 76.00 | 87.00 | 97.00 | 103.00 | 111.00 | 112.00 | a | 110.00 | 105.00 | b | 100.00 | 82.00 | 73.00 | 112.00 | c | ||||||||||
1965 | 78.00 | 79.00 | 84.00 | 98.00 | 103.00 | 107.00 | 113.00 | 111.00 | a | 104.00 | 103.00 | 89.00 | 81.00 | a | 113.00 | b | ||||||||||
1966 | 75.00 | 73.00 | b | 93.00 | d | 95.00 | 103.00 | 112.00 | h | 113.00 | 110.00 | 106.00 | 94.00 | a | 89.00 | ----- | 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 | 87.00 | 97.00 | a | 110.00 | 113.00 | 115.00 | 112.00 | 105.00 | 94.00 | 91.00 | 73.00 | ----- | z | |||||||||
2002 | 80.00 | 81.00 | 90.00 | 99.00 | 106.00 | 111.00 | 111.00 | 111.00 | a | 108.00 | 93.00 | 84.00 | 71.00 | 111.00 | a | |||||||||||
2003 | 84.00 | 81.00 | 89.00 | a | 87.00 | 107.00 | 109.00 | h | 114.00 | a | 114.00 | a | 107.00 | 103.00 | 80.00 | 77.00 | 114.00 | k | ||||||||
2004 | 77.00 | 79.00 | 98.00 | 98.00 | 101.00 | 106.00 | 109.00 | 110.00 | 107.00 | 95.00 | c | 84.00 | 79.00 | 110.00 | c | |||||||||||
2005 | 77.00 | 70.00 | 84.00 | 92.00 | 108.00 | 113.00 | 116.00 | 112.00 | 104.00 | 97.00 | 87.00 | 80.00 | 116.00 | |||||||||||||
2006 | 80.00 | a | 82.00 | 82.00 | 94.00 | 104.00 | 110.00 | 116.00 | 108.00 | 105.00 | 94.00 | 87.00 | 76.00 | 116.00 | a | |||||||||||
2007 | 75.00 | 78.00 | 92.00 | 96.00 | 99.00 | 107.00 | 112.00 | 108.00 | 106.00 | 95.00 | 86.00 | 69.00 | 112.00 | |||||||||||||
2008 | 65.00 | 75.00 | 84.00 | 94.00 | 105.00 | a | 111.00 | 111.00 | 112.00 | 105.00 | 99.00 | 88.00 | 70.00 | 112.00 | a | |||||||||||
2009 | 77.00 | 80.00 | 87.00 | 99.00 | 107.00 | 111.00 | 115.00 | 112.00 | 106.00 | 100.00 | 91.00 | 73.00 | 115.00 | |||||||||||||
2010 | 74.00 | 77.00 | 83.00 | 92.00 | 98.00 | 112.00 | 113.00 | 111.00 | 107.00 | 102.00 | 89.00 | 81.00 | 113.00 | |||||||||||||
2011 | 75.00 | 77.00 | 94.00 | 98.00 | 99.00 | 112.00 | 114.00 | 113.00 | 109.00 | 99.00 | 85.00 | 76.00 | 114.00 | |||||||||||||
2012 | 80.00 | 78.00 | 88.00 | 102.00 | 107.00 | 109.00 | 112.00 | 113.00 | 106.00 | 102.00 | 91.00 | 80.00 | 113.00 | |||||||||||||
2013 | 79.00 | 76.00 | 91.00 | 101.00 | 102.00 | 119.00 | 112.00 | 112.00 | 107.00 | 94.00 | 91.00 | 79.00 | 119.00 | |||||||||||||
2014 | 77.00 | 85.00 | 87.00 | 97.00 | 105.00 | 108.00 | 113.00 | 107.00 | 104.00 | 97.00 | 86.00 | 80.00 | 113.00 | |||||||||||||
2015 | 79.00 | 83.00 | 94.00 | 96.00 | 105.00 | 113.00 | 108.00 | 113.00 | 105.00 | 101.00 | 82.00 | 78.00 | 113.00 | |||||||||||||
2016 | 72.00 | 85.00 | 89.00 | 96.00 | 101.00 | 118.00 | 112.00 | 110.00 | 104.00 | 95.00 | 88.00 | 74.00 | 118.00 | |||||||||||||
2017 | 75.00 | 80.00 | a | 93.00 | 95.00 | 105.00 | 119.00 | 115.00 | 112.00 | 109.00 | 99.00 | 90.00 | 81.00 | 119.00 | a | |||||||||||
2018 | 80.00 | 85.00 | 91.00 | 98.00 | 103.00 | 109.00 | 116.00 | 115.00 | 108.00 | 89.00 | 81.00 | 77.00 | 116.00 | |||||||||||||
2019 | 73.00 | 75.00 | a | 85.00 | 98.00 | 98.00 | 111.00 | 112.00 | 115.00 | 109.00 | 96.00 | 87.00 | 70.00 | 115.00 | a | |||||||||||
2020 | 75.00 | 78.00 | 82.00 | 104.00 | c | 112.00 | 113.00 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 75.63 | 79.12 | 86.93 | 95.95 | 103.90 | 111.13 | 112.88 | 111.10 | 107.00 | 97.33 | 86.43 | 76.61 | 114.00 | |||||||||||||
S.D. | 4.09 | 4.21 | 4.47 | 3.95 | 3.60 | 3.20 | 2.03 | 2.36 | 2.20 | 3.56 | 3.36 | 3.77 | 2.30 | |||||||||||||
SKEW | -0.98 | 0.23 | 0.19 | -0.72 | 0.16 | 0.75 | -0.07 | -0.16 | 0.68 | -0.49 | -0.57 | -0.53 | 0.47 | |||||||||||||
MAX | 84.00 | 90.00 | 98.00 | 104.00 | 112.00 | 119.00 | 117.00 | 115.00 | 113.00 | 103.00 | 91.00 | 83.00 | 119.00 | |||||||||||||
MIN | 62.00 | 70.00 | 78.00 | 86.00 | 98.00 | 106.00 | 108.00 | 106.00 | 104.00 | 88.00 | 80.00 | 68.00 | 110.00 | |||||||||||||
YRS | 43 | 42 | 44 | 43 | 42 | 39 | 42 | 42 | 41 | 42 | 42 | 41 | 34 |