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 | 58.65 | 63.97 | 60.81 | 78.13 | 94.19 | 98.73 | ----- | z | 105.03 | 100.57 | 95.77 | 70.73 | 64.65 | 81.02 | a | |||||||||||
1953 | 69.45 | 67.36 | 75.17 | a | 79.80 | 83.26 | 100.17 | 105.00 | a | 102.93 | c | 102.12 | f | 87.00 | 76.07 | 64.48 | 82.79 | a | ||||||||
1954 | 63.81 | 76.75 | 71.07 | a | 86.47 | 93.00 | 97.27 | 105.00 | 101.53 | a | 100.79 | a | 90.70 | a | 78.97 | 65.71 | 85.92 | |||||||||
1955 | 57.13 | 62.74 | a | 72.55 | 78.90 | a | 87.67 | a | 98.37 | 99.81 | 97.90 | 98.20 | 90.74 | 74.07 | 66.74 | 82.07 | ||||||||||
1956 | 68.13 | a | 62.76 | 77.35 | 79.97 | 90.48 | 101.30 | 102.32 | 101.42 | 102.03 | 85.00 | a | 74.10 | 67.43 | a | 84.36 | ||||||||||
1957 | 59.55 | 71.36 | 72.23 | 77.90 | a | 84.16 | 101.47 | 104.07 | a | 100.35 | 97.93 | 78.87 | a | 65.83 | a | 67.45 | b | 81.76 | ||||||||
1958 | 66.13 | 68.00 | 63.90 | b | 77.47 | 94.29 | 100.30 | 105.13 | a | 103.10 | 98.82 | b | 89.23 | a | 73.47 | 72.87 | 84.39 | |||||||||
1959 | 67.37 | a | 63.96 | 76.97 | a | 86.30 | 87.77 | a | 102.53 | 107.00 | 98.71 | 93.77 | 88.29 | 73.27 | 65.61 | 84.30 | ||||||||||
1960 | 57.03 | 61.33 | b | 75.97 | 83.03 | 89.97 | 103.97 | 107.13 | 103.97 | 98.40 | 83.10 | 71.93 | 64.90 | a | 83.39 | |||||||||||
1961 | 68.00 | 70.64 | 72.77 | 82.97 | 88.74 | 103.50 | 105.58 | 101.87 | 92.83 | a | 86.06 | 67.73 | 61.39 | 83.51 | ||||||||||||
1962 | 62.90 | 63.93 | 67.03 | a | 87.80 | 86.94 | 98.97 | 104.42 | 105.81 | 97.67 | 85.71 | 77.30 | 67.74 | 83.85 | ||||||||||||
1963 | 60.61 | 73.86 | 71.58 | 76.80 | 92.10 | 95.63 | 105.97 | 99.33 | a | 97.17 | 86.55 | 71.17 | a | 67.10 | 83.16 | |||||||||||
1964 | 61.39 | 64.76 | 69.93 | a | 78.27 | 88.10 | 97.83 | 104.97 | 100.00 | 94.87 | 92.23 | 68.87 | 63.39 | 82.05 | ||||||||||||
1965 | 65.55 | 68.29 | 68.90 | 75.93 | 84.74 | 93.27 | 103.55 | 103.23 | 92.07 | 91.94 | 72.87 | 62.19 | 81.88 | |||||||||||||
1966 | 60.97 | 61.56 | a | 76.45 | 84.53 | 93.48 | 99.77 | 104.26 | 103.84 | 96.83 | 85.16 | 74.13 | 64.06 | 83.75 | ||||||||||||
1967 | 65.42 | 72.43 | 74.87 | 72.23 | 89.03 | 94.97 | 104.16 | 101.97 | 92.73 | 89.29 | 76.38 | a | 57.94 | 82.62 | ||||||||||||
1968 | 65.45 | 72.52 | 74.19 | 78.73 | 90.19 | 101.20 | 100.71 | 97.39 | 97.30 | 86.68 | 73.03 | 64.65 | 83.50 | |||||||||||||
1969 | 67.06 | 63.96 | 72.16 | 85.07 | 95.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.79 | g | |||||
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 | 87.68 | 99.77 | 105.92 | g | 103.40 | f | 98.77 | 85.45 | 74.67 | 66.65 | 85.50 | f | ||||||
1976 | 67.03 | 68.55 | 70.55 | 76.37 | 90.97 | 98.87 | 103.32 | 102.77 | 92.63 | 83.68 | 76.97 | 69.58 | 83.44 | |||||||||||||
1977 | 62.81 | 74.00 | 70.29 | 83.80 | 82.35 | 102.43 | 105.10 | 103.45 | 97.63 | 89.58 | 77.27 | 69.32 | 84.84 | |||||||||||||
1978 | 61.90 | 65.00 | a | 73.39 | 76.97 | 89.10 | 103.20 | 106.58 | 103.55 | 96.70 | 90.94 | 68.57 | 59.52 | 82.95 | ||||||||||||
1979 | 54.83 | b | 65.14 | 70.10 | 80.80 | 88.48 | 100.93 | 106.39 | 101.00 | 103.00 | 89.32 | 71.43 | 69.45 | 83.41 | ||||||||||||
1980 | 63.48 | 69.21 | 68.68 | 80.53 | 84.77 | 100.17 | 107.42 | 104.19 | 99.50 | 89.00 | 77.50 | 73.39 | 84.82 | |||||||||||||
1981 | 70.16 | 71.79 | 71.90 | 86.53 | 90.71 | 106.53 | k | 107.29 | 106.42 | 98.50 | 82.29 | 76.33 | 67.26 | 84.47 | a | |||||||||||
1982 | 62.03 | 68.00 | 69.39 | 80.13 | 90.58 | 99.50 | 103.45 | 101.39 | 94.63 | 83.29 | 69.23 | 60.48 | 81.84 | |||||||||||||
1983 | 66.32 | 65.29 | 68.35 | 74.13 | 90.26 | 98.30 | 104.45 | 99.81 | 97.93 | 84.00 | 70.50 | 64.06 | 81.95 | |||||||||||||
1984 | 66.48 | 70.28 | 77.52 | 80.17 | 98.16 | 99.17 | 102.37 | a | 100.19 | 98.50 | 80.87 | 70.90 | 59.03 | 83.64 | ||||||||||||
1985 | 61.52 | 65.18 | 71.00 | 86.30 | 93.61 | 103.77 | 107.39 | 105.35 | 90.93 | 84.32 | 68.00 | 66.84 | 83.68 | |||||||||||||
1986 | 72.13 | 68.82 | 78.16 | 81.60 | 93.16 | 104.17 | 101.84 | 103.42 | 90.57 | 83.06 | 73.50 | 63.65 | 84.51 | |||||||||||||
1987 | 60.94 | 67.71 | 70.32 | 87.77 | 90.48 | 103.10 | 102.84 | 102.58 | 97.37 | 89.45 | 70.55 | a | 61.10 | 83.68 | ||||||||||||
1988 | 62.90 | 71.93 | 76.23 | 80.73 | 91.40 | a | 100.70 | 106.97 | 101.00 | 96.23 | 93.26 | 72.97 | 64.81 | 84.93 | ||||||||||||
1989 | 62.55 | 68.96 | 80.52 | 91.93 | 92.68 | 101.83 | 107.63 | a | 101.68 | 98.83 | 87.94 | 78.40 | 67.77 | 86.73 | ||||||||||||
1990 | 63.32 | 65.00 | 76.32 | 83.43 | 90.00 | 103.37 | 103.84 | 100.84 | 96.90 | 88.97 | b | 75.03 | a | 61.65 | 84.06 | |||||||||||
1991 | 63.16 | 76.50 | 65.10 | 79.73 | 86.94 | 95.70 | 104.97 | 102.77 | 96.27 | 90.58 | 73.17 | 64.03 | 83.24 | |||||||||||||
1992 | 64.45 | 68.59 | 70.52 | 85.07 | a | 91.42 | 98.43 | 103.10 | 103.06 | 99.97 | 89.87 | 71.03 | 60.61 | 83.84 | ||||||||||||
1993 | 61.65 | 63.29 | 76.13 | a | 83.73 | 93.65 | 98.81 | c | 101.90 | a | 103.32 | 98.10 | 85.94 | 70.77 | 68.23 | 83.79 | ||||||||||
1994 | 68.32 | 65.00 | ----- | z | 84.20 | 90.39 | 105.63 | 106.45 | 105.61 | 99.20 | 84.58 | 68.87 | 65.30 | a | 85.78 | a | ||||||||||
1995 | 61.32 | 75.46 | 72.90 | 78.40 | 84.97 | 97.53 | 106.61 | 104.87 | 98.70 | 90.06 | 81.93 | 70.00 | 85.23 | |||||||||||||
1996 | 68.68 | 73.79 | 75.61 | 86.57 | 95.16 | 104.43 | 107.61 | 106.71 | 95.00 | 90.23 | 75.57 | 67.26 | 87.22 | |||||||||||||
1997 | 63.77 | 68.57 | 81.42 | 80.03 | a | 96.52 | 98.23 | 103.03 | 101.58 | 95.90 | 84.39 | 76.40 | 61.58 | 84.29 | ||||||||||||
1998 | 64.84 | ----- | z | ----- | z | 74.43 | 85.61 | 95.40 | 105.97 | 104.55 | 94.87 | 84.48 | 74.50 | 65.74 | 85.04 | b | ||||||||||
1999 | 69.65 | 70.68 | 77.45 | 79.17 | 92.00 | 99.40 | 101.32 | f | 104.00 | i | 99.05 | j | 92.68 | l | 82.25 | j | 70.10 | k | 81.39 | f | ||||||
2000 | 69.74 | l | 71.45 | i | 72.39 | h | 90.65 | j | 97.81 | o | 104.22 | l | 106.26 | l | 101.96 | h | 100.47 | k | 82.30 | k | 67.63 | k | 68.79 | l | ----- | z |
2001 | 63.14 | i | 65.69 | l | 76.20 | k | 82.00 | k | 100.15 | k | 102.70 | j | 103.33 | m | 103.76 | j | 102.47 | m | 92.60 | k | 74.68 | k | 62.75 | k | ----- | z |
2002 | 65.00 | l | 74.00 | k | 76.40 | p | 87.89 | k | 93.88 | o | 104.30 | j | 106.22 | m | 104.67 | p | 98.88 | n | 86.21 | q | 78.40 | o | 64.65 | n | ----- | z |
2003 | 74.72 | m | 65.32 | i | 73.39 | m | 78.64 | h | 98.79 | q | 100.94 | m | 109.23 | e | 102.78 | h | 101.80 | j | 97.15 | k | 71.00 | u | 67.24 | j | 109.23 | k |
2004 | 66.65 | k | 62.78 | k | 82.05 | l | 83.29 | m | 92.88 | n | 100.55 | h | 104.16 | l | 101.75 | k | 96.31 | n | 80.19 | o | 66.82 | m | 64.36 | t | ----- | z |
2005 | 60.57 | q | 65.06 | k | 71.79 | q | 81.83 | r | 80.64 | q | 97.38 | i | 110.67 | p | 99.94 | n | 99.68 | k | 85.46 | r | ----- | z | 68.29 | n | ----- | z |
2006 | 69.93 | p | 73.44 | l | 70.50 | o | 84.71 | p | 98.31 | r | 105.00 | p | 106.87 | p | 102.83 | m | 95.46 | q | 84.00 | l | 74.33 | u | 65.67 | v | ----- | z |
2007 | 66.36 | q | 71.33 | p | 80.89 | l | 84.00 | n | 93.71 | g | 100.06 | n | 106.00 | f | 104.84 | f | 97.30 | g | 87.79 | l | 80.39 | b | 61.05 | j | 80.39 | k |
2008 | 61.95 | l | 65.00 | g | 76.96 | d | 84.00 | h | 88.82 | c | 102.80 | 104.10 | b | 104.07 | d | 100.35 | j | ----- | z | ----- | z | 60.45 | 89.54 | f | ||
2009 | 67.46 | c | 66.41 | a | 76.03 | 81.10 | a | 96.44 | d | 95.83 | 107.32 | 104.87 | 98.33 | 81.00 | 76.59 | a | 58.84 | 84.19 | ||||||||
2010 | 64.68 | 65.07 | 70.74 | 77.57 | 86.32 | 100.17 | 106.39 | 102.32 | 101.13 | 84.68 | 71.20 | 66.29 | 83.05 | |||||||||||||
2011 | 65.58 | 62.75 | 74.94 | 81.70 | 86.65 | 99.90 | 104.16 | 107.26 | 99.10 | 88.20 | a | 71.87 | 59.81 | 83.49 | ||||||||||||
2012 | 68.84 | 68.45 | 73.97 | 83.20 | 94.29 | 104.07 | 102.06 | 103.58 | 97.57 | 88.87 | 78.53 | 62.58 | 85.50 | |||||||||||||
2013 | 61.03 | 64.39 | 78.42 | 83.30 | 91.08 | f | 105.19 | c | 102.42 | 101.18 | c | 94.33 | 83.52 | 74.20 | 65.39 | 83.03 | a | |||||||||
2014 | 72.25 | c | 72.96 | 74.94 | o | 83.73 | 91.13 | 102.40 | 105.35 | 98.35 | 96.87 | 88.77 | 74.15 | d | 63.35 | e | 86.30 | a | ||||||||
2015 | 66.06 | 76.14 | 79.27 | e | 82.52 | e | 84.59 | b | 102.97 | 100.87 | a | 104.77 | a | 98.83 | a | 86.06 | 72.16 | e | 61.76 | b | 84.67 | |||||
2016 | 62.97 | 76.59 | b | 81.04 | d | 81.78 | c | 88.03 | b | 105.67 | 106.35 | 100.77 | 95.10 | 90.13 | a | 77.10 | a | 65.93 | a | 85.96 | ||||||
2017 | 61.47 | a | 69.48 | a | 80.00 | 82.42 | k | 90.13 | 103.96 | g | 105.87 | 103.52 | 95.63 | 90.50 | i | 80.13 | 71.93 | c | 84.24 | c | ||||||
2018 | 72.10 | 69.32 | 73.00 | 88.19 | i | 91.83 | a | 103.04 | e | 104.71 | 104.06 | 101.45 | a | 82.29 | 74.00 | 65.52 | 85.57 | a | ||||||||
2019 | 62.58 | 59.57 | e | 74.93 | b | 87.33 | i | 83.11 | d | 100.14 | b | 105.93 | c | 105.96 | g | 97.07 | a | 84.17 | b | 75.11 | b | 61.00 | d | 80.36 | b | |
2020 | 65.76 | f | 69.61 | k | 70.43 | h | 82.13 | g | 97.08 | f | 101.33 | c | 109.65 | h | 110.58 | 102.89 | c | 94.59 | d | 80.41 | h | 67.40 | f | 102.35 | h | |
2021 | 67.12 | n | 70.74 | i | 76.67 | s | 90.92 | r | 94.83 | g | 109.67 | f | 107.39 | c | 107.16 | 100.79 | a | 84.96 | d | 80.27 | h | 65.81 | 93.22 | g | ||
2022 | 67.42 | 68.32 | f | 76.81 | 85.47 | 94.03 | 103.34 | a | 104.97 | b | 101.00 | 99.03 | 85.97 | a | 68.86 | a | 63.79 | c | 86.43 | a | ||||||
2023 | 60.18 | c | 66.78 | a | 66.10 | b | 82.83 | 90.97 | 96.03 | 109.90 | a | 103.87 | 96.67 | 88.81 | 72.97 | a | 69.16 | 83.69 | ||||||||
2024 | 62.96 | e | 66.90 | 70.32 | 80.62 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.73 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 64.36 | 68.18 | 73.30 | 81.46 | 90.02 | 100.45 | 104.96 | 102.83 | 97.33 | 87.09 | 73.66 | 64.95 | 83.88 | |||||||||||||
S.D. | 3.83 | 4.33 | 4.43 | 3.97 | 3.70 | 2.96 | 2.15 | 2.53 | 2.82 | 3.57 | 3.50 | 3.55 | 1.26 | |||||||||||||
SKEW | 0.01 | 0.29 | -0.42 | 0.06 | -0.09 | -0.28 | -0.18 | 0.27 | -0.34 | 0.11 | 0.10 | 0.17 | 0.46 | |||||||||||||
MAX | 72.25 | 76.75 | 81.42 | 91.93 | 98.16 | 105.67 | 109.90 | 110.58 | 103.00 | 95.77 | 81.93 | 73.39 | 87.22 | |||||||||||||
MIN | 54.83 | 59.57 | 60.81 | 72.23 | 82.35 | 93.27 | 99.81 | 97.39 | 90.57 | 78.87 | 65.83 | 57.94 | 81.76 | |||||||||||||
YRS | 56 | 54 | 54 | 52 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 56 | 42 |