YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1955 | ----- | z | 71.00 | 80.00 | 85.00 | 103.00 | 105.00 | 109.00 | 114.00 | 114.00 | 92.00 | 84.00 | 76.00 | ----- | z | |||||||||||
1956 | 65.00 | 65.00 | 85.00 | 91.00 | 99.00 | 112.00 | 114.00 | 103.00 | 105.00 | 95.00 | 86.00 | 71.00 | 114.00 | |||||||||||||
1957 | 61.00 | 73.00 | 80.00 | a | 93.00 | 98.00 | 112.00 | 109.00 | 106.00 | 106.00 | 90.00 | 77.00 | 71.00 | 112.00 | a | |||||||||||
1958 | 68.00 | 72.00 | 70.00 | 85.00 | 99.00 | 104.00 | 109.00 | 107.00 | g | 104.00 | 100.00 | 85.00 | 73.00 | 109.00 | g | |||||||||||
1959 | 72.00 | 70.00 | 81.00 | 92.00 | 95.00 | 112.00 | 114.00 | 109.00 | 102.00 | 97.00 | 86.00 | 73.00 | 114.00 | |||||||||||||
1960 | 72.00 | 68.00 | 87.00 | b | 92.00 | 97.00 | 113.00 | 115.00 | 110.00 | 103.00 | 92.00 | 83.00 | 68.00 | 115.00 | b | |||||||||||
1961 | 70.00 | 78.00 | 80.00 | 92.00 | 90.00 | 116.00 | 113.00 | 108.00 | 100.00 | 101.00 | 79.00 | 64.00 | 116.00 | |||||||||||||
1962 | 64.00 | 67.00 | 76.00 | 97.00 | 96.00 | 109.00 | 109.00 | 109.00 | 104.00 | 93.00 | 85.00 | 73.00 | 109.00 | |||||||||||||
1963 | 66.00 | 75.00 | 82.00 | 82.00 | 99.00 | 106.00 | 106.00 | 106.00 | 104.00 | 100.00 | 78.00 | 59.00 | 106.00 | |||||||||||||
1964 | 66.00 | 72.00 | 89.00 | 94.00 | 96.00 | 112.00 | 110.00 | 106.00 | 99.00 | 97.00 | 74.00 | 74.00 | 112.00 | |||||||||||||
1965 | 68.00 | 75.00 | 82.00 | 95.00 | 101.00 | a | 98.00 | 104.00 | 104.00 | b | 95.00 | 94.00 | 83.00 | 60.00 | 104.00 | c | ||||||||||
1966 | 66.00 | a | 76.00 | 81.00 | 93.00 | 99.00 | 106.00 | 108.00 | 108.00 | 103.00 | 93.00 | 84.00 | 63.00 | a | 108.00 | b | ||||||||||
1967 | 60.00 | ----- | z | ----- | z | 72.00 | 105.00 | a | 96.00 | ----- | z | 111.00 | 108.00 | 91.00 | 86.00 | 66.00 | ----- | z | ||||||||
1968 | 70.00 | a | 73.00 | 85.00 | 94.00 | a | 100.00 | 107.00 | d | 110.00 | 107.00 | 102.00 | f | 94.00 | 70.00 | j | 68.00 | 110.00 | v | |||||||
1969 | 71.00 | 67.00 | 89.00 | 89.00 | 100.00 | 102.00 | 108.00 | 107.00 | 104.00 | 95.00 | 85.00 | 76.00 | 108.00 | |||||||||||||
1970 | 77.00 | 75.00 | 81.00 | 84.00 | b | 103.00 | a | 107.00 | 110.00 | 108.00 | 103.00 | 101.00 | 80.00 | 70.00 | p | 110.00 | s | |||||||||
1971 | 66.00 | b | 72.00 | 78.00 | 93.00 | 94.00 | a | 103.00 | 107.00 | a | 110.00 | 105.00 | a | 96.00 | b | 76.00 | b | 67.00 | a | 110.00 | j | |||||
1972 | 60.00 | 74.00 | 89.00 | a | 93.00 | 103.00 | 105.00 | a | 112.00 | a | 105.00 | 103.00 | 92.00 | 75.00 | a | 65.00 | a | 112.00 | e | |||||||
1973 | 66.00 | 69.00 | 71.00 | 93.00 | 105.00 | 110.00 | 109.00 | 106.00 | a | 97.00 | a | 97.00 | b | 84.00 | a | 71.00 | b | 110.00 | g | |||||||
1974 | 79.00 | c | 72.00 | a | 78.00 | a | 87.00 | d | 106.00 | a | 105.00 | 103.00 | m | 106.00 | f | 112.00 | a | 77.00 | x | 78.00 | b | 66.00 | t | ----- | z | |
1975 | 66.00 | i | 71.00 | 81.00 | 82.00 | d | 102.00 | 104.00 | a | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 102.00 | g | 82.00 | c | 65.00 | ----- | z | |
2002 | 69.00 | m | 84.00 | c | 83.00 | c | 92.00 | i | 102.00 | 103.00 | d | 108.00 | d | 104.00 | k | 105.00 | e | 96.00 | f | 80.00 | a | 69.00 | g | ----- | z | |
2003 | 66.00 | a | 68.00 | g | 85.00 | b | 86.00 | 105.00 | 104.00 | d | 106.00 | f | 104.00 | 103.00 | f | 93.00 | a | 73.00 | c | 73.00 | c | ----- | z | |||
2004 | 71.00 | i | 55.00 | x | 92.00 | e | 98.00 | g | 103.00 | b | 100.00 | b | 106.00 | 110.00 | 104.00 | a | 95.00 | a | 71.00 | d | 65.00 | b | ----- | z | ||
2005 | 64.00 | a | 68.00 | b | 80.00 | a | 85.00 | 98.00 | 96.00 | a | 108.00 | b | 105.00 | 99.00 | 97.00 | d | 84.00 | c | 76.00 | a | 108.00 | o | ||||
2006 | 67.00 | 78.00 | b | 76.00 | b | 88.00 | b | 103.00 | b | 106.00 | a | 112.00 | 104.00 | c | 101.00 | d | 87.00 | c | 79.00 | a | 79.00 | a | 112.00 | u | ||
2007 | 70.00 | 74.00 | a | 87.00 | b | 98.00 | d | 98.00 | 108.00 | b | 112.00 | 106.00 | 104.00 | 90.00 | 79.00 | a | 68.00 | 112.00 | j | |||||||
2008 | 67.00 | 71.00 | 79.00 | 92.00 | 105.00 | a | 112.00 | 111.00 | b | 106.00 | c | 105.00 | 96.00 | b | 82.00 | 59.00 | a | 112.00 | i | |||||||
2009 | 68.00 | d | 71.00 | b | 82.00 | d | 99.00 | a | 106.00 | c | 108.00 | c | 112.00 | a | 105.00 | 105.00 | a | 85.00 | b | 86.00 | a | 65.00 | a | 112.00 | w | |
2010 | 68.00 | 70.00 | a | 82.00 | 86.00 | c | 91.00 | a | 106.00 | a | 105.00 | a | 112.00 | c | 102.00 | 99.00 | a | 91.00 | 68.00 | 112.00 | k | |||||
2011 | 62.00 | a | 73.00 | 78.00 | 86.00 | 96.00 | 106.00 | 104.00 | 102.00 | 100.00 | 92.00 | 79.00 | 64.00 | 106.00 | a | |||||||||||
2012 | 68.00 | 78.00 | 78.00 | 97.00 | 96.00 | 109.00 | 107.00 | 108.00 | 102.00 | 101.00 | 83.00 | 70.00 | 109.00 | |||||||||||||
2013 | 65.00 | 71.00 | 83.00 | 93.00 | 98.00 | a | 105.00 | 109.00 | 105.00 | 101.00 | 89.00 | 78.00 | 71.00 | 109.00 | a | |||||||||||
2014 | 79.00 | 81.00 | 83.00 | 90.00 | 99.00 | a | 108.00 | 109.00 | 108.00 | 103.00 | 96.00 | 84.00 | 72.00 | 109.00 | a | |||||||||||
2015 | 66.00 | 80.00 | 91.00 | 93.00 | 99.00 | 108.00 | 107.00 | 109.00 | 104.00 | 100.00 | 82.00 | 75.00 | 109.00 | |||||||||||||
2016 | 67.00 | 80.00 | 82.00 | 91.00 | 97.00 | 107.00 | b | 110.00 | 107.00 | 103.00 | 92.00 | 86.00 | a | 71.00 | 110.00 | c | ||||||||||
2017 | 72.00 | 75.00 | 86.00 | 86.00 | a | 102.00 | 108.00 | b | 108.00 | a | 109.00 | c | 109.00 | d | 91.00 | c | 83.00 | f | 65.00 | j | ----- | z | ||||
2018 | 71.00 | h | 76.00 | e | 84.00 | h | 93.00 | i | 98.00 | e | 102.00 | h | 107.00 | e | 105.00 | m | 100.00 | e | 89.00 | c | 80.00 | e | 71.00 | g | ----- | z |
2019 | 68.00 | e | 70.00 | d | 83.00 | g | 98.00 | o | 90.00 | i | 106.00 | b | 110.00 | a | 107.00 | g | 101.00 | k | 90.00 | f | 81.00 | c | 70.00 | i | ----- | z |
2020 | 67.00 | e | 81.00 | o | 82.00 | n | 91.00 | g | 104.00 | d | 105.00 | 106.00 | b | 108.00 | c | 105.00 | q | 97.00 | f | 82.00 | e | 73.00 | c | ----- | z | |
2021 | 71.00 | c | 74.00 | 81.00 | j | 89.00 | c | 100.00 | d | 111.00 | d | 111.00 | d | 107.00 | h | 106.00 | b | 92.00 | g | 75.00 | 73.00 | ----- | z | |||
2022 | 67.00 | c | 81.00 | a | 89.00 | e | 95.00 | b | 102.00 | h | 105.00 | f | 112.00 | c | 108.00 | h | 116.00 | j | 95.00 | i | 78.00 | q | 68.00 | o | ----- | z |
2023 | 68.00 | r | 70.00 | f | 73.00 | f | 95.00 | f | 97.00 | g | 97.00 | g | 110.00 | e | 105.00 | l | 96.00 | t | 95.00 | n | 80.00 | l | 77.00 | o | ----- | z |
2024 | 75.00 | k | 73.00 | h | 81.00 | h | 86.00 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.81 | 73.42 | 82.19 | 90.05 | 99.75 | 106.50 | 109.23 | 107.21 | 103.44 | 94.34 | 81.15 | 69.29 | 110.00 | |||||||||||||
S.D. | 4.40 | 4.37 | 5.00 | 5.40 | 3.90 | 4.39 | 2.68 | 2.63 | 3.67 | 4.13 | 4.31 | 5.08 | 3.37 | |||||||||||||
SKEW | 0.74 | 0.40 | -0.18 | -0.97 | -0.36 | -0.40 | 0.09 | 0.34 | 0.54 | -0.09 | -0.31 | -0.32 | 0.20 | |||||||||||||
MAX | 79.00 | 84.00 | 92.00 | 99.00 | 106.00 | 116.00 | 115.00 | 114.00 | 114.00 | 101.00 | 91.00 | 79.00 | 116.00 | |||||||||||||
MIN | 60.00 | 65.00 | 70.00 | 72.00 | 90.00 | 96.00 | 104.00 | 102.00 | 95.00 | 85.00 | 71.00 | 59.00 | 104.00 | |||||||||||||
YRS | 37 | 38 | 37 | 37 | 40 | 40 | 39 | 34 | 36 | 35 | 39 | 35 | 17 |