YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 70.00 | 76.00 | 79.00 | 89.00 | 102.00 | 110.00 | ----- | z | 116.00 | 112.00 | 103.00 | 88.00 | 79.00 | ----- | z | |||||||||||
1953 | 83.00 | 80.00 | 89.00 | a | 95.00 | 94.00 | 110.00 | 115.00 | a | 110.00 | c | 108.00 | f | 102.00 | 89.00 | 80.00 | 115.00 | k | ||||||||
1954 | 77.00 | 85.00 | 85.00 | a | 97.00 | 100.00 | 112.00 | 113.00 | 111.00 | a | 108.00 | a | 99.00 | a | 85.00 | 74.00 | 113.00 | d | ||||||||
1955 | 72.00 | 80.00 | a | 82.00 | 86.00 | a | 98.00 | a | 114.00 | 108.00 | 107.00 | 109.00 | 99.00 | 86.00 | 75.00 | 114.00 | c | |||||||||
1956 | 79.00 | a | 75.00 | 91.00 | 92.00 | 102.00 | 110.00 | 114.00 | 108.00 | 107.00 | 97.00 | a | 88.00 | 78.00 | a | 114.00 | c | |||||||||
1957 | 67.00 | 87.00 | 84.00 | 87.00 | a | 97.00 | 112.00 | 114.00 | a | 112.00 | 107.00 | 100.00 | a | 79.00 | a | 79.00 | b | 114.00 | f | |||||||
1958 | 75.00 | 79.00 | 77.00 | b | 96.00 | 107.00 | 109.00 | 115.00 | a | 110.00 | 107.00 | b | 99.00 | a | 85.00 | 84.00 | 115.00 | f | ||||||||
1959 | 81.00 | a | 73.00 | 82.00 | a | 98.00 | 99.00 | a | 111.00 | 113.00 | 107.00 | 105.00 | 99.00 | 82.00 | 82.00 | 113.00 | c | |||||||||
1960 | 72.00 | 72.00 | b | 88.00 | 93.00 | 106.00 | 110.00 | 115.00 | 114.00 | 105.00 | 97.00 | 87.00 | 76.00 | a | 115.00 | c | ||||||||||
1961 | 78.00 | 77.00 | 85.00 | 98.00 | 97.00 | 115.00 | 114.00 | 111.00 | 100.00 | a | 98.00 | 78.00 | 71.00 | 115.00 | a | |||||||||||
1962 | 77.00 | 78.00 | 87.00 | a | 98.00 | 98.00 | 110.00 | 110.00 | 113.00 | 108.00 | 96.00 | 88.00 | 80.00 | 113.00 | a | |||||||||||
1963 | 72.00 | 88.00 | 82.00 | 94.00 | 101.00 | 107.00 | 111.00 | 109.00 | a | 105.00 | 100.00 | 84.00 | a | 75.00 | 111.00 | b | ||||||||||
1964 | 78.00 | 76.00 | 89.00 | a | 95.00 | 100.00 | 110.00 | 110.00 | 108.00 | 103.00 | 105.00 | 82.00 | 70.00 | 110.00 | a | |||||||||||
1965 | 80.00 | 81.00 | 83.00 | 96.00 | 99.00 | 104.00 | 111.00 | 109.00 | 103.00 | 103.00 | 88.00 | 82.00 | 111.00 | |||||||||||||
1966 | 76.00 | 73.00 | a | 94.00 | 95.00 | 102.00 | 110.00 | 110.00 | 111.00 | 104.00 | 93.00 | 89.00 | 76.00 | 111.00 | a | |||||||||||
1967 | 75.00 | 82.00 | 88.00 | 82.00 | 106.00 | 108.00 | 115.00 | 108.00 | 99.00 | 97.00 | 89.00 | a | 69.00 | 115.00 | a | |||||||||||
1968 | 76.00 | 86.00 | 89.00 | 91.00 | 105.00 | 112.00 | 109.00 | 106.00 | 108.00 | 95.00 | 81.00 | 78.00 | 112.00 | |||||||||||||
1969 | 77.00 | 73.00 | 87.00 | 95.00 | 105.00 | ----- | 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 | 105.00 | 109.00 | 112.00 | g | 113.00 | f | 106.00 | 100.00 | 91.00 | 82.00 | ----- | z | ||||||
1976 | 80.00 | 80.00 | 83.00 | 90.00 | 102.00 | 113.00 | 114.00 | 107.00 | 109.00 | 97.00 | 90.00 | 75.00 | 114.00 | |||||||||||||
1977 | 76.00 | 87.00 | 85.00 | 95.00 | 100.00 | 113.00 | 111.00 | 115.00 | 110.00 | 98.00 | 87.00 | 79.00 | 115.00 | |||||||||||||
1978 | 73.00 | 79.00 | a | 87.00 | 88.00 | 103.00 | 111.00 | 114.00 | 110.00 | 106.00 | 105.00 | 86.00 | 72.00 | 114.00 | a | |||||||||||
1979 | 65.00 | b | 78.00 | 83.00 | 93.00 | 101.00 | 115.00 | 113.00 | 111.00 | 111.00 | 101.00 | 80.00 | 80.00 | 115.00 | b | |||||||||||
1980 | 72.00 | 83.00 | 76.00 | 97.00 | 101.00 | 114.00 | 117.00 | 114.00 | 108.00 | 109.00 | 94.00 | 84.00 | 117.00 | |||||||||||||
1981 | 79.00 | 88.00 | 85.00 | 103.00 | 100.00 | 114.00 | k | 116.00 | 112.00 | 106.00 | 92.00 | 85.00 | 80.00 | 116.00 | k | |||||||||||
1982 | 77.00 | 83.00 | 82.00 | 95.00 | 99.00 | 107.00 | 110.00 | 110.00 | 111.00 | 91.00 | 81.00 | 72.00 | 111.00 | |||||||||||||
1983 | 78.00 | 79.00 | 83.00 | 87.00 | 110.00 | 105.00 | 112.00 | 109.00 | 108.00 | 90.00 | 87.00 | 71.00 | 112.00 | |||||||||||||
1984 | 79.00 | 82.00 | 86.00 | 99.00 | 109.00 | 111.00 | 114.00 | a | 111.00 | 106.00 | 95.00 | 85.00 | 72.00 | 114.00 | a | |||||||||||
1985 | 70.00 | 80.00 | 82.00 | 98.00 | 101.00 | 117.00 | 116.00 | 114.00 | 105.00 | 98.00 | 86.00 | 80.00 | 117.00 | |||||||||||||
1986 | 81.00 | 93.00 | 93.00 | 97.00 | 106.00 | 115.00 | 110.00 | 113.00 | 108.00 | 92.00 | 85.00 | 72.00 | 115.00 | |||||||||||||
1987 | 79.00 | 79.00 | 83.00 | 100.00 | 100.00 | 110.00 | 112.00 | 108.00 | 109.00 | 105.00 | 81.00 | a | 74.00 | 112.00 | a | |||||||||||
1988 | 78.00 | 79.00 | 94.00 | 95.00 | 103.00 | a | 113.00 | 113.00 | 109.00 | 105.00 | 101.00 | 93.00 | 77.00 | 113.00 | a | |||||||||||
1989 | 80.00 | 86.00 | 91.00 | 103.00 | 106.00 | 112.00 | 116.00 | a | 110.00 | 108.00 | 99.00 | 89.00 | 78.00 | 116.00 | a | |||||||||||
1990 | 80.00 | 82.00 | 91.00 | 97.00 | 98.00 | 117.00 | 113.00 | 109.00 | 111.00 | 97.00 | b | 88.00 | a | 76.00 | 117.00 | c | ||||||||||
1991 | 71.00 | 83.00 | 77.00 | 92.00 | 98.00 | 104.00 | 113.00 | 109.00 | 106.00 | 102.00 | 91.00 | 76.00 | 113.00 | |||||||||||||
1992 | 79.00 | 78.00 | 80.00 | 99.00 | a | 99.00 | 105.00 | 111.00 | 112.00 | 103.00 | 100.00 | 82.00 | 68.00 | 112.00 | a | |||||||||||
1993 | 76.00 | 73.00 | 86.00 | a | 96.00 | 100.00 | 113.00 | c | 107.00 | a | 116.00 | 106.00 | 101.00 | 80.00 | 76.00 | 116.00 | e | |||||||||
1994 | 79.00 | 75.00 | ----- | z | 99.00 | 102.00 | 116.00 | 117.00 | 112.00 | 106.00 | 100.00 | 85.00 | 78.00 | a | ----- | z | ||||||||||
1995 | 71.00 | 85.00 | 86.00 | 89.00 | 95.00 | 108.00 | 119.00 | 112.00 | 109.00 | 98.00 | 89.00 | 82.00 | 119.00 | |||||||||||||
1996 | 82.00 | 88.00 | 89.00 | 100.00 | 106.00 | 109.00 | 114.00 | 112.00 | 105.00 | 104.00 | 88.00 | 80.00 | 114.00 | |||||||||||||
1997 | 75.00 | 80.00 | 93.00 | 97.00 | a | 106.00 | 106.00 | 112.00 | 108.00 | 103.00 | 99.00 | 89.00 | 77.00 | 112.00 | a | |||||||||||
1998 | 77.00 | ----- | z | ----- | z | 93.00 | 95.00 | 110.00 | 117.00 | 114.00 | 103.00 | 95.00 | 84.00 | 80.00 | ----- | z | ||||||||||
1999 | 78.00 | 80.00 | 86.00 | 95.00 | 102.00 | 109.00 | 111.00 | f | 109.00 | i | 107.00 | j | 100.00 | l | 92.00 | j | 83.00 | k | ----- | z | ||||||
2000 | 81.00 | l | 81.00 | i | 86.00 | h | 102.00 | j | 108.00 | o | 111.00 | l | 112.00 | l | 111.00 | h | 108.00 | k | 101.00 | k | 77.00 | k | 77.00 | l | ----- | z |
2001 | 76.00 | i | 81.00 | l | 85.00 | k | 98.00 | k | 107.00 | k | 107.00 | j | 114.00 | m | 112.00 | j | 105.00 | m | 104.00 | k | 92.00 | k | 74.00 | k | ----- | z |
2002 | 79.00 | l | 84.00 | k | 89.00 | p | 98.00 | k | 108.00 | o | 109.00 | j | 111.00 | m | 111.00 | p | 107.00 | n | 95.00 | q | 86.00 | o | 71.00 | n | ----- | z |
2003 | 81.00 | m | 84.00 | i | 84.00 | m | 88.00 | h | 109.00 | q | 110.00 | m | 116.00 | e | 112.00 | h | 107.00 | j | 104.00 | k | 81.00 | u | 79.00 | j | ----- | z |
2004 | 77.00 | k | 78.00 | k | 96.00 | l | 96.00 | m | 99.00 | n | 107.00 | h | 111.00 | l | 111.00 | k | 107.00 | n | 96.00 | o | 85.00 | m | 74.00 | t | ----- | z |
2005 | 80.00 | q | 70.00 | k | 87.00 | q | 90.00 | r | 96.00 | q | 112.00 | i | 119.00 | p | 108.00 | n | 105.00 | k | 98.00 | r | ----- | z | 81.00 | n | ----- | z |
2006 | 82.00 | p | 85.00 | l | 81.00 | o | 92.00 | p | 103.00 | r | 111.00 | p | 114.00 | p | 108.00 | m | 103.00 | q | 100.00 | l | 92.00 | u | 80.00 | v | ----- | z |
2007 | 78.00 | q | 81.00 | p | 97.00 | l | 101.00 | n | 102.00 | g | 108.00 | n | 117.00 | f | 111.00 | f | 109.00 | g | 94.00 | l | 91.00 | b | 71.00 | j | ----- | z |
2008 | 68.00 | l | 78.00 | g | 85.00 | d | 94.00 | h | 109.00 | c | 112.00 | 112.00 | b | 108.00 | d | 107.00 | j | ----- | z | ----- | z | 74.00 | ----- | z | ||
2009 | 78.00 | c | 80.00 | a | 87.00 | 99.00 | a | 105.00 | d | 110.00 | 113.00 | 113.00 | 106.00 | 100.00 | 94.00 | a | 73.00 | 113.00 | j | |||||||
2010 | 72.00 | 75.00 | 84.00 | 92.00 | 97.00 | 109.00 | 114.00 | 111.00 | 109.00 | 107.00 | 92.00 | 80.00 | 114.00 | |||||||||||||
2011 | 82.00 | 77.00 | 85.00 | 97.00 | 97.00 | 111.00 | 115.00 | 114.00 | 110.00 | 101.00 | a | 88.00 | 75.00 | 115.00 | a | |||||||||||
2012 | 79.00 | 78.00 | 88.00 | 102.00 | 106.00 | 109.00 | 116.00 | 113.00 | 104.00 | 102.00 | 92.00 | 80.00 | 116.00 | |||||||||||||
2013 | 78.00 | 78.00 | 91.00 | 99.00 | 103.00 | f | 118.00 | c | 113.00 | 108.00 | c | 106.00 | 92.00 | 88.00 | 81.00 | 118.00 | l | |||||||||
2014 | 79.00 | c | 85.00 | 84.00 | o | 95.00 | 104.00 | 108.00 | 112.00 | 108.00 | 105.00 | 97.00 | 89.00 | d | 76.00 | e | ----- | z | ||||||||
2015 | 81.00 | 83.00 | 93.00 | e | 93.00 | e | 103.00 | b | 110.00 | 106.00 | a | 112.00 | a | 106.00 | a | 102.00 | 84.00 | e | 77.00 | b | 112.00 | v | ||||
2016 | 73.00 | 86.00 | b | 90.00 | d | 96.00 | c | 101.00 | b | 117.00 | 114.00 | 110.00 | 105.00 | 95.00 | a | 88.00 | a | 77.00 | a | 117.00 | n | |||||
2017 | 75.00 | a | 81.00 | a | 92.00 | 93.00 | k | 104.00 | 116.00 | g | 116.00 | 111.00 | 106.00 | 97.00 | i | 89.00 | 82.00 | c | ----- | z | ||||||
2018 | 82.00 | 83.00 | 88.00 | 98.00 | i | 104.00 | a | 110.00 | e | 113.00 | 112.00 | 108.00 | a | 96.00 | 83.00 | 76.00 | 113.00 | p | ||||||||
2019 | 76.00 | 73.00 | e | 86.00 | b | 97.00 | i | 96.00 | d | 108.00 | b | 111.00 | c | 111.00 | g | 111.00 | a | 95.00 | b | 87.00 | b | 70.00 | d | ----- | z | |
2020 | 75.00 | f | 80.00 | k | 82.00 | h | 101.00 | g | 109.00 | f | 109.00 | c | 117.00 | h | 118.00 | 116.00 | c | 107.00 | d | 96.00 | h | 81.00 | f | ----- | z | |
2021 | 81.00 | n | 80.00 | i | 85.00 | s | 98.00 | r | 103.00 | g | 120.00 | f | 120.00 | c | 118.00 | 113.00 | a | 98.00 | d | 89.00 | h | 87.00 | ----- | z | ||
2022 | 73.00 | 82.00 | f | 94.00 | 97.00 | 107.00 | 110.00 | a | 113.00 | b | 112.00 | 107.00 | 97.00 | a | 82.00 | a | 75.00 | c | 113.00 | n | ||||||
2023 | 73.00 | c | 84.00 | a | 75.00 | b | 99.00 | 99.00 | 102.00 | 116.00 | a | 112.00 | 107.00 | 101.00 | 89.00 | a | 80.00 | 116.00 | h | |||||||
2024 | 79.00 | e | 76.00 | 81.00 | 90.00 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 76.43 | 80.37 | 85.94 | 95.06 | 101.73 | 110.53 | 113.24 | 111.04 | 106.85 | 98.93 | 86.55 | 77.00 | 113.83 | |||||||||||||
S.D. | 3.92 | 4.73 | 4.72 | 4.37 | 3.83 | 3.45 | 2.78 | 2.76 | 3.06 | 4.11 | 3.84 | 4.11 | 2.05 | |||||||||||||
SKEW | -0.71 | 0.26 | -0.23 | -0.72 | 0.11 | 0.02 | -0.20 | 0.49 | 0.23 | 0.10 | -0.24 | -0.10 | 0.30 | |||||||||||||
MAX | 83.00 | 93.00 | 94.00 | 103.00 | 110.00 | 118.00 | 120.00 | 118.00 | 116.00 | 109.00 | 94.00 | 87.00 | 119.00 | |||||||||||||
MIN | 65.00 | 72.00 | 75.00 | 82.00 | 94.00 | 102.00 | 106.00 | 106.00 | 99.00 | 90.00 | 78.00 | 68.00 | 110.00 | |||||||||||||
YRS | 56 | 54 | 54 | 52 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 56 | 35 |