YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | 48.07 | b | 65.41 | 70.65 | 74.50 | 89.52 | 94.30 | 99.55 | 99.52 | 94.13 | 78.06 | 63.17 | 51.19 | 77.34 | ||||||||||||
1929 | 49.11 | c | 61.04 | d | 65.65 | e | 70.38 | d | 86.52 | d | 91.48 | e | 98.52 | d | 99.48 | d | 88.46 | d | 82.56 | d | 73.31 | d | 58.81 | e | 77.11 | |
1930 | 51.14 | c | 65.48 | c | 68.04 | e | 72.42 | d | 77.57 | c | 93.16 | e | 97.82 | c | 97.00 | e | 86.73 | d | 79.85 | d | 69.12 | e | 57.50 | e | 76.32 | |
1931 | 56.15 | d | 63.80 | c | 69.69 | e | 79.00 | j | 88.88 | e | 83.73 | d | 100.71 | c | 100.15 | d | 87.46 | d | 81.44 | d | 66.46 | d | 54.82 | c | 77.57 | a |
1932 | 51.59 | d | 57.96 | d | 68.14 | c | 74.73 | d | 84.50 | e | 94.12 | d | 97.48 | b | 96.93 | b | 95.27 | d | 81.74 | d | 73.69 | d | 49.96 | d | 77.18 | |
1933 | 47.59 | d | 57.12 | d | 68.26 | d | 75.30 | c | 76.33 | d | 89.65 | d | 104.04 | e | 98.78 | d | 88.04 | d | 86.81 | e | 66.59 | c | 54.70 | d | 76.10 | |
1934 | 52.07 | d | 62.92 | c | 77.17 | b | 87.15 | d | 89.52 | b | 90.81 | d | 101.00 | a | 101.72 | b | 94.86 | b | 80.67 | a | 64.80 | 54.97 | a | 79.80 | ||
1935 | 54.37 | a | 58.78 | a | 61.42 | 71.67 | 86.50 | i | 97.07 | b | 97.48 | b | 101.00 | f | 94.67 | 77.19 | 63.20 | 58.83 | a | 73.47 | b | |||||
1936 | 59.12 | e | 58.64 | a | 68.54 | c | 76.13 | 87.87 | 94.77 | 102.00 | 100.97 | 94.97 | 81.03 | 69.53 | 54.68 | 79.02 | ||||||||||
1937 | 48.48 | 60.64 | 65.26 | 70.57 | 87.35 | 91.80 | 102.35 | 100.71 | 92.07 | 81.90 | 68.20 | 58.68 | 77.33 | |||||||||||||
1938 | 53.03 | 60.93 | 62.58 | 72.20 | 83.23 | 92.50 | 98.35 | 95.84 | 91.77 | 76.90 | 66.20 | 57.35 | 75.91 | |||||||||||||
1939 | 55.58 | 59.00 | 68.23 | 81.87 | 85.13 | a | 93.57 | 99.45 | 99.42 | 93.37 | 82.03 | 72.90 | 63.32 | 79.49 | ||||||||||||
1940 | 55.81 | 63.66 | 70.87 | a | 77.37 | 87.94 | 97.33 | 97.42 | 97.84 | 86.90 | 81.13 | 66.63 | 62.68 | 78.80 | ||||||||||||
1941 | 59.45 | 62.11 | 69.74 | 71.13 | 84.07 | b | 89.07 | a | 99.29 | 92.16 | 87.83 | 76.13 | 68.73 | 57.65 | 76.45 | |||||||||||
1942 | 55.97 | 61.07 | 70.10 | 72.80 | 80.10 | a | 91.87 | 99.16 | 97.48 | 88.79 | a | 81.13 | 65.86 | a | 53.97 | 76.52 | ||||||||||
1943 | 57.06 | 64.50 | 68.65 | e | 76.53 | 85.97 | 87.13 | 96.39 | 93.48 | 93.10 | 79.00 | 69.20 | 59.94 | 77.58 | ||||||||||||
1944 | 59.55 | 61.21 | a | 70.94 | 71.97 | 83.77 | 85.43 | 95.77 | 95.48 | 92.83 | 84.68 | 62.70 | 57.32 | c | 76.81 | |||||||||||
1945 | 53.00 | b | 63.04 | b | 63.57 | a | 77.76 | a | 82.39 | 93.73 | 102.66 | b | 97.77 | 94.83 | 81.10 | a | 65.23 | 56.42 | 77.62 | |||||||
1946 | 55.16 | 59.14 | 67.53 | a | 80.83 | 84.74 | 91.90 | 99.13 | 98.45 | 91.77 | 77.65 | 62.57 | 52.19 | 76.76 | ||||||||||||
1947 | 50.77 | 61.07 | 71.39 | 80.33 | 90.71 | 92.60 | 97.42 | 94.84 | 95.97 | 77.42 | 63.00 | 54.52 | 77.50 | |||||||||||||
1948 | 64.65 | 61.69 | 65.65 | 71.80 | 79.84 | 92.97 | 99.94 | 97.58 | 93.27 | 81.84 | 68.73 | 52.39 | 77.53 | |||||||||||||
1949 | 50.35 | 58.43 | 63.84 | 81.40 | 84.16 | 96.77 | d | 99.64 | f | 92.65 | 92.13 | 84.55 | 74.07 | 56.65 | 75.91 | a | ||||||||||
1950 | 52.10 | 63.25 | 66.77 | 80.07 | 86.58 | 92.53 | 101.45 | 97.29 | 91.40 | ----- | z | 70.17 | 57.71 | 78.12 | a | |||||||||||
1951 | 53.74 | 61.25 | 67.52 | 76.93 | 85.93 | b | 93.97 | a | 99.84 | f | 96.40 | p | 96.15 | c | 80.33 | a | 66.41 | a | 55.16 | 73.74 | b | |||||
1952 | 54.48 | 63.21 | 64.41 | b | 75.87 | 90.20 | a | 87.30 | 99.29 | 97.00 | 93.62 | a | 85.81 | 66.67 | 55.55 | 77.78 | ||||||||||
1953 | 59.40 | f | 63.25 | 69.16 | 75.80 | 79.35 | 87.93 | 101.32 | 93.74 | d | 93.63 | 81.61 | 66.03 | 57.97 | a | 79.07 | a | |||||||||
1954 | 58.20 | a | 60.38 | b | 66.40 | a | 82.21 | a | 90.23 | 91.62 | a | 102.47 | a | 95.13 | a | 91.31 | a | 83.16 | 63.41 | a | 51.90 | 78.04 | ||||
1955 | 49.94 | 61.85 | a | 70.26 | 72.00 | 84.48 | 94.36 | e | 98.76 | b | 103.03 | b | 95.86 | a | 84.61 | 65.66 | a | 57.00 | a | 78.15 | ||||||
1956 | 55.42 | 59.00 | a | 71.27 | a | 75.37 | 84.00 | 96.59 | a | 99.24 | b | 96.76 | b | 94.53 | 78.35 | 70.73 | 58.68 | c | 78.33 | |||||||
1957 | 53.57 | a | 64.22 | a | 69.40 | a | 77.34 | a | 80.93 | d | 97.70 | 100.97 | 96.94 | 91.67 | 75.90 | 64.83 | 54.29 | 77.31 | ||||||||
1958 | 55.57 | a | 64.00 | 62.26 | 74.17 | 88.32 | 91.07 | 98.52 | 101.77 | 94.60 | 88.26 | 71.50 | 65.55 | 79.63 | ||||||||||||
1959 | 58.71 | 61.04 | 74.65 | 83.77 | 85.48 | 97.00 | 103.68 | 98.17 | a | 88.77 | 84.97 | 74.20 | 61.87 | 81.02 | ||||||||||||
1960 | 57.48 | 61.14 | 71.52 | 77.33 | 85.71 | 102.17 | 104.48 | 100.68 | 96.37 | 81.84 | 63.77 | 53.90 | 79.70 | |||||||||||||
1961 | 50.35 | 65.11 | a | 68.29 | 79.00 | 80.81 | 98.93 | 104.45 | 100.29 | 91.97 | 84.23 | 67.13 | 52.13 | 78.56 | ||||||||||||
1962 | 50.74 | 54.00 | 64.45 | 82.30 | 81.68 | 94.70 | 101.29 | 98.29 | 94.07 | 79.87 | 72.03 | 58.84 | 77.69 | |||||||||||||
1963 | 54.06 | 65.70 | a | 65.77 | 66.57 | 80.97 | 87.80 | 95.71 | 95.42 | 88.33 | 80.00 | q | 52.60 | t | 43.84 | 74.42 | b | |||||||||
1964 | 52.65 | 62.79 | 65.23 | 74.13 | 79.52 | 88.60 | 97.97 | 97.10 | a | 87.87 | 84.71 | 61.48 | a | 57.10 | 75.76 | |||||||||||
1965 | 53.13 | 60.30 | a | 66.32 | 69.37 | 82.97 | 86.03 | ----- | z | 95.84 | 85.37 | 84.39 | 65.67 | 48.81 | 72.56 | a | ||||||||||
1966 | 55.16 | 59.39 | 69.42 | 79.83 | ----- | z | 91.80 | 94.97 | 99.45 | 89.87 | 82.52 | 67.55 | a | 50.37 | a | 76.39 | a | |||||||||
1967 | 54.68 | 57.71 | 65.13 | 61.03 | 83.29 | 87.33 | 102.19 | 102.65 | 93.27 | 83.48 | 68.63 | 54.23 | 76.14 | |||||||||||||
1968 | 53.13 | 63.72 | 68.77 | 77.43 | 82.77 | 94.40 | 99.80 | a | 93.00 | 91.57 | 78.94 | 62.00 | 53.03 | 76.55 | ||||||||||||
1969 | 50.87 | 55.89 | 65.19 | 72.93 | 86.03 | 86.23 | 99.23 | 100.03 | 94.70 | 76.45 | 69.80 | 59.77 | 76.43 | |||||||||||||
1970 | 59.68 | 64.04 | 68.61 | 72.60 | 87.00 | a | 91.53 | 101.42 | 97.94 | 92.47 | 79.94 | 68.34 | a | 54.97 | 78.21 | |||||||||||
1971 | 54.29 | 57.36 | 66.55 | 72.27 | 77.29 | 90.27 | 99.81 | 99.06 | 91.47 | 78.71 | 66.00 | a | 51.58 | g | 77.55 | a | ||||||||||
1972 | 47.31 | e | 62.41 | b | 75.17 | b | 75.37 | 86.87 | a | 94.17 | 99.65 | 94.90 | 87.30 | 76.39 | 58.33 | 48.58 | 75.54 | |||||||||
1973 | 54.42 | 60.50 | 60.80 | a | 75.63 | 88.90 | 95.97 | 97.62 | b | 96.71 | 89.43 | 78.48 | 63.53 | 53.87 | 76.32 | |||||||||||
1974 | 54.87 | 61.75 | 65.68 | 72.23 | 85.84 | 93.57 | 96.77 | 96.90 | a | 95.40 | 81.52 | 65.38 | a | 54.16 | 77.01 | |||||||||||
1975 | 52.71 | 60.54 | 63.39 | 67.43 | b | 84.48 | 91.40 | 94.84 | 93.06 | 92.00 | 77.23 | a | 62.70 | 56.16 | 74.66 | |||||||||||
1976 | 58.35 | 62.61 | a | 65.76 | b | 69.93 | 86.93 | b | 91.10 | 96.84 | 88.00 | 87.41 | a | 81.77 | 66.50 | 60.71 | 76.33 | |||||||||
1977 | 48.52 | 65.07 | 64.81 | 79.79 | a | 74.35 | 93.23 | 97.29 | 94.19 | 88.30 | 82.68 | 67.87 | 59.03 | 76.26 | ||||||||||||
1978 | 58.19 | 59.25 | 68.45 | 70.07 | a | 82.90 | 90.77 | 97.10 | a | 94.23 | a | 86.15 | d | 84.32 | 62.63 | 50.35 | 75.37 | |||||||||
1979 | 54.07 | a | 58.96 | 66.13 | 74.73 | 85.74 | 93.87 | 95.48 | 93.06 | 93.80 | 80.97 | 65.90 | 59.97 | 76.89 | ||||||||||||
1980 | 57.28 | b | ----- | z | 66.03 | a | ----- | z | 78.00 | n | ----- | z | 97.00 | ----- | z | 90.00 | 83.32 | 68.73 | 57.69 | e | 74.29 | e | ||||
1981 | 58.00 | a | 63.77 | f | 64.61 | 75.83 | a | 84.77 | 97.73 | 99.91 | h | 98.88 | e | 94.88 | m | 75.32 | 66.83 | 56.97 | a | 75.44 | c | |||||
1982 | 52.35 | 62.50 | 63.04 | d | 71.27 | 85.81 | 87.37 | 96.55 | 95.46 | e | 85.67 | 77.80 | a | 59.41 | a | 55.00 | 74.35 | |||||||||
1983 | 50.20 | a | 62.14 | 64.77 | 69.73 | 82.87 | 89.23 | 93.55 | 94.97 | a | 93.58 | d | 81.03 | 64.97 | 57.19 | 75.35 | ||||||||||
1984 | 54.26 | 62.21 | 71.81 | 72.87 | 90.26 | 91.27 | 100.55 | 97.06 | 96.04 | d | 75.19 | 64.40 | 53.39 | 77.44 | ||||||||||||
1985 | 48.13 | a | 64.12 | c | 64.84 | 80.87 | 82.39 | 94.04 | e | 99.24 | b | 93.26 | 84.37 | 75.32 | f | 60.63 | 47.13 | 74.46 | a | |||||||
1986 | 58.47 | a | ----- | z | 69.30 | a | 74.57 | 83.84 | 93.93 | c | 95.00 | 97.50 | c | 82.86 | b | 79.58 | 68.97 | 52.23 | 77.84 | a | ||||||
1987 | 52.79 | b | 62.14 | 65.87 | 81.40 | 85.52 | 92.73 | 90.61 | 93.97 | 89.96 | b | 83.55 | 63.70 | 54.06 | 76.36 | |||||||||||
1988 | 55.16 | 66.90 | 70.61 | 73.77 | 80.68 | 88.90 | 99.06 | 94.35 | 90.53 | 83.45 | 64.14 | a | 53.19 | 76.73 | ||||||||||||
1989 | 52.29 | 57.14 | 67.30 | a | 80.17 | 82.61 | 90.10 | 96.71 | 92.84 | 88.03 | a | 78.35 | 67.90 | 52.48 | 75.49 | |||||||||||
1990 | 56.13 | 58.21 | 68.35 | 78.07 | 80.74 | 90.17 | 97.71 | 94.45 | b | 89.43 | 83.34 | b | 66.27 | 51.63 | a | 76.21 | ||||||||||
1991 | 57.20 | a | 67.32 | 60.50 | a | 71.40 | 78.77 | 88.37 | 97.65 | 90.90 | 94.10 | 83.93 | a | 66.97 | a | 54.93 | a | 76.00 | ||||||||
1992 | 46.65 | 64.00 | 67.81 | 79.27 | 89.50 | a | 89.23 | 93.93 | a | 97.97 | 92.20 | 80.58 | 65.79 | a | 52.20 | a | 76.59 | |||||||||
1993 | 53.03 | b | 60.78 | a | 69.27 | a | 72.87 | 82.19 | 88.80 | 93.50 | c | 93.55 | 90.70 | 80.38 | b | 66.24 | a | 52.40 | a | 75.31 | ||||||
1994 | 56.13 | a | 60.11 | a | 70.97 | a | 74.93 | c | 79.90 | 92.20 | 96.86 | b | 97.29 | 89.46 | b | 77.19 | 56.89 | c | 50.29 | 75.19 | ||||||
1995 | 57.83 | a | 59.00 | 65.07 | b | 70.77 | 77.71 | 86.89 | b | 94.55 | 95.86 | b | 90.39 | b | 81.42 | 72.10 | 58.10 | b | 75.81 | |||||||
1996 | 54.90 | a | 62.44 | b | 69.00 | d | 77.80 | e | 82.83 | a | 91.81 | d | 99.80 | f | 98.48 | d | 89.50 | f | 75.64 | c | 63.04 | d | 55.24 | b | 73.12 | b |
1997 | 55.75 | g | 62.09 | e | 73.47 | n | 77.24 | e | 88.85 | d | 90.58 | k | 94.70 | h | 95.48 | h | 90.92 | d | 79.64 | f | 67.61 | g | 52.52 | f | 79.78 | h |
1998 | 56.16 | 56.29 | 66.25 | g | 69.30 | g | 73.00 | b | 85.00 | 97.52 | 98.35 | 88.07 | 76.67 | a | 63.40 | 53.70 | h | 77.16 | c | |||||||
1999 | 52.40 | f | 59.11 | 63.74 | 69.47 | 80.09 | i | 89.00 | 94.16 | 91.77 | a | 90.67 | 83.84 | 68.43 | 57.90 | 76.81 | b | |||||||||
2000 | 58.85 | k | 62.45 | 64.95 | j | 77.03 | 84.35 | 93.45 | a | 93.61 | 96.00 | 88.73 | 76.35 | 59.97 | 57.32 | 78.93 | b | |||||||||
2001 | 55.93 | a | 58.29 | 70.05 | j | 71.48 | i | 91.97 | 95.10 | 94.45 | ----- | z | 90.00 | l | 82.86 | j | 65.50 | j | 54.67 | m | 79.15 | g | ||||
2002 | 52.37 | l | 63.00 | m | 66.85 | k | 75.41 | h | 81.43 | h | 95.28 | l | 98.58 | l | ----- | z | 92.33 | l | 77.73 | i | 67.12 | m | 58.00 | j | ----- | z |
2003 | 56.90 | k | 60.84 | i | ----- | z | 70.55 | h | 81.29 | 91.83 | a | 99.39 | 92.84 | 91.93 | 83.94 | 61.57 | 56.97 | 82.47 | d | |||||||
2004 | 51.67 | a | 59.07 | 73.23 | 77.40 | 83.13 | 90.37 | 96.00 | 93.81 | 89.27 | 73.26 | 59.55 | a | 51.23 | a | 74.83 | ||||||||||
2005 | 50.77 | 61.82 | 66.81 | 70.40 | 80.45 | 88.22 | u | 98.94 | 96.10 | 85.20 | 76.94 | 67.28 | a | ----- | z | 75.47 | b | |||||||||
2006 | 56.65 | 62.25 | 59.42 | 68.23 | 82.67 | a | 89.06 | l | 99.66 | b | 92.45 | b | 88.10 | 74.81 | 62.83 | 54.25 | g | 74.71 | b | |||||||
2007 | 54.27 | a | 59.86 | ----- | z | 74.18 | b | 84.16 | 90.76 | a | 95.73 | a | 94.80 | a | 85.90 | 73.37 | d | 66.70 | 52.84 | 75.69 | a | |||||
2008 | 53.97 | 59.45 | 67.26 | 73.36 | p | 81.77 | 92.00 | 95.84 | 95.90 | 89.87 | 79.92 | s | 65.09 | h | 50.77 | 76.31 | c | |||||||||
2009 | 56.19 | 60.32 | 65.90 | 74.03 | 86.26 | 86.27 | 97.11 | d | 95.55 | 92.55 | a | 73.39 | 64.80 | 53.94 | 75.53 | |||||||||||
2010 | 54.23 | 59.14 | 66.45 | b | 68.07 | b | 76.61 | 91.38 | n | 96.23 | 93.81 | 90.47 | 77.97 | 63.40 | 57.32 | 73.06 | a | |||||||||
2011 | 51.42 | 60.18 | 64.74 | 72.30 | 78.17 | a | 87.11 | b | 95.85 | r | 95.48 | 91.81 | c | 77.94 | 61.97 | 56.52 | 72.51 | a | ||||||||
2012 | 59.52 | 62.52 | 66.74 | 73.50 | 82.97 | a | 88.68 | b | 94.19 | 97.44 | d | 90.76 | a | 77.09 | h | 63.83 | a | 54.03 | 75.83 | a | ||||||
2013 | 55.15 | k | 60.75 | 71.94 | 75.34 | a | 81.52 | 92.37 | 97.59 | d | 94.23 | 87.00 | 76.94 | 67.83 | 57.42 | 78.45 | a | |||||||||
2014 | 64.61 | 64.11 | 71.48 | 77.70 | 85.29 | 92.47 | 97.55 | 94.81 | 90.72 | a | 82.35 | 65.41 | a | 59.26 | 78.81 | |||||||||||
2015 | 55.42 | 66.50 | 75.81 | 76.27 | 80.45 | 94.67 | 94.77 | 94.77 | 90.43 | 81.32 | 62.03 | a | 54.42 | 77.24 | ||||||||||||
2016 | 57.57 | a | 66.67 | b | 68.06 | 75.97 | 82.90 | 94.17 | 96.87 | 95.29 | 87.93 | c | 77.20 | a | 66.90 | 54.45 | 77.00 | |||||||||
2017 | 53.03 | a | 61.89 | 68.52 | 72.90 | 83.45 | b | 93.63 | 99.68 | 97.35 | 88.53 | 77.97 | 66.87 | 59.65 | 76.96 | |||||||||||
2018 | 61.86 | q | 60.00 | 66.03 | 75.00 | 81.14 | b | ----- | z | 98.71 | 95.35 | 89.33 | 77.81 | 67.77 | 59.32 | 77.05 | b | |||||||||
2019 | 58.87 | 57.04 | 65.62 | g | ----- | z | ----- | z | ----- | z | 99.57 | j | 97.16 | 89.27 | 77.35 | 68.60 | 58.62 | b | 72.42 | e | ||||||
2020 | 56.84 | 66.79 | 65.87 | 74.37 | 85.65 | 88.35 | m | 98.07 | a | 97.87 | 91.10 | 87.25 | k | ----- | z | ----- | z | 79.57 | d | |||||||
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 54.38 | 61.40 | 67.47 | 74.91 | 83.75 | 91.78 | 98.18 | 96.40 | 90.83 | 80.19 | 66.03 | 55.41 | 77.00 | |||||||||||||
S.D. | 3.58 | 2.73 | 3.38 | 4.31 | 3.83 | 3.47 | 2.76 | 2.78 | 3.07 | 3.32 | 3.56 | 3.69 | 1.38 | |||||||||||||
SKEW | 0.18 | -0.01 | 0.31 | -0.01 | -0.26 | 0.11 | 0.10 | 0.00 | -0.17 | -0.02 | 0.10 | -0.16 | 0.60 | |||||||||||||
MAX | 64.65 | 67.32 | 77.17 | 87.15 | 91.97 | 102.17 | 104.48 | 103.03 | 96.37 | 88.26 | 74.20 | 65.55 | 81.02 | |||||||||||||
MIN | 46.65 | 54.00 | 59.42 | 61.03 | 73.00 | 83.73 | 90.61 | 88.00 | 82.86 | 73.26 | 56.89 | 43.84 | 74.35 | |||||||||||||
YRS | 85 | 88 | 85 | 85 | 87 | 84 | 84 | 87 | 89 | 84 | 87 | 85 | 60 |