YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 85.10 | 80.63 | 73.06 | 69.33 | 72.45 | 76.12 | g | |||||
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 | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | 69.62 | o | 72.43 | 77.26 | 82.74 | 79.80 | 74.77 | 67.66 | a | 66.52 | 74.45 | e | ||||||
1963 | 64.67 | a | 71.43 | 66.35 | 66.40 | 70.70 | a | 72.97 | 78.97 | 80.65 | 84.31 | a | 76.13 | 68.60 | 67.58 | 72.40 | ||||||||||
1964 | 62.52 | ----- | z | 67.95 | j | 68.57 | 69.35 | 72.17 | 79.47 | a | 79.19 | 77.27 | 79.58 | 69.43 | 63.94 | 72.15 | b | |||||||||
1965 | 66.61 | 66.75 | 65.39 | 68.47 | 69.16 | 69.28 | a | 77.00 | 83.00 | 77.87 | 82.68 | 68.67 | 71.46 | r | 72.26 | a | ||||||||||
1966 | 63.76 | j | 63.64 | 67.42 | 71.21 | b | 70.87 | a | 75.33 | 79.74 | 82.61 | 80.00 | 80.40 | p | 70.73 | 67.00 | 72.86 | b | ||||||||
1967 | 67.17 | b | 71.26 | a | 66.03 | a | 61.93 | 73.62 | b | 71.71 | f | 80.68 | 84.87 | 81.13 | 82.23 | 74.17 | 64.30 | a | 73.40 | a | ||||||
1968 | 67.61 | 69.00 | 69.23 | 70.67 | 71.42 | 74.60 | 81.23 | 80.77 | 80.40 | ----- | z | 72.50 | 65.73 | a | 73.01 | a | ||||||||||
1969 | 64.97 | 60.64 | 65.23 | 69.23 | 70.71 | 71.37 | 80.26 | 85.35 | 80.10 | 75.94 | 75.10 | a | 66.58 | 72.12 | ||||||||||||
1970 | 64.81 | 70.57 | 67.81 | 69.38 | a | 73.87 | a | 75.21 | a | 82.63 | a | 82.97 | 82.28 | a | 75.60 | a | 70.63 | 63.80 | a | 73.30 | ||||||
1971 | 65.81 | 65.63 | a | 67.77 | 68.23 | 68.03 | 73.80 | 80.87 | 86.32 | f | 82.73 | 78.89 | c | 65.88 | m | 60.29 | 71.21 | b | ||||||||
1972 | 65.67 | a | 68.00 | 68.52 | 71.20 | 73.71 | 75.78 | c | 83.57 | a | 83.55 | ----- | z | 74.61 | 69.60 | 65.52 | 72.70 | a | ||||||||
1973 | 63.55 | b | 65.40 | c | 61.81 | 68.18 | b | 71.72 | b | 78.13 | 78.35 | e | 79.53 | a | 77.10 | ----- | z | 68.37 | 68.68 | 70.98 | a | |||||
1974 | 64.26 | 69.26 | a | 66.23 | 71.55 | a | 70.48 | 78.00 | 81.70 | a | 79.13 | 80.33 | 74.10 | 73.33 | 66.32 | 72.89 | ||||||||||
1975 | 68.63 | a | 63.00 | a | 63.53 | a | 62.97 | 68.23 | 70.93 | 78.30 | a | 78.35 | 81.33 | c | 75.57 | a | 72.34 | a | 67.74 | 70.91 | ||||||
1976 | 73.10 | a | 66.31 | 68.07 | a | 65.93 | a | 71.57 | a | 79.20 | 78.35 | 80.94 | 77.70 | 79.35 | 78.07 | 73.03 | a | 74.30 | ||||||||
1977 | 67.10 | a | 73.00 | 65.68 | 69.90 | 68.48 | 74.50 | 81.61 | 81.29 | 79.50 | 77.10 | 76.90 | 69.03 | 73.67 | ||||||||||||
1978 | 65.57 | a | 66.64 | 69.77 | 67.67 | 76.71 | 81.60 | 81.94 | 81.10 | 84.40 | 80.13 | 69.47 | 64.90 | 74.16 | ||||||||||||
1979 | 62.55 | 64.93 | 66.39 | 70.83 | 73.45 | 80.30 | 80.74 | 81.87 | 89.00 | 76.19 | 72.73 | 72.81 | 74.32 | |||||||||||||
1980 | 66.52 | 71.03 | 68.00 | 71.63 | 67.81 | 77.69 | a | 83.68 | 82.61 | 79.03 | 79.07 | a | 75.79 | a | 74.61 | 74.79 | ||||||||||
1981 | 69.87 | 72.57 | 66.90 | 72.17 | 73.77 | 83.43 | 84.19 | 85.42 | 82.80 | 76.23 | 73.20 | 70.35 | 75.91 | |||||||||||||
1982 | 64.73 | a | 68.54 | 67.00 | c | 71.63 | 71.20 | a | 71.80 | 82.77 | 84.68 | 82.96 | c | 82.65 | 71.13 | 67.13 | 73.85 | |||||||||
1983 | 71.39 | 68.21 | 67.10 | 70.21 | a | 75.06 | 75.04 | b | 82.67 | a | 88.70 | a | 86.30 | 82.06 | 71.53 | 66.87 | 75.43 | |||||||||
1984 | 71.40 | a | 71.34 | 74.43 | a | 73.55 | a | 80.47 | a | 78.60 | 87.77 | 85.52 | 90.21 | b | 77.69 | b | 69.23 | 64.68 | 77.08 | |||||||
1985 | 66.33 | a | 68.36 | 66.71 | 76.15 | d | 74.10 | b | 81.73 | 88.33 | a | 86.23 | 81.17 | a | 78.50 | a | 68.27 | 70.81 | 75.56 | |||||||
1986 | 73.83 | a | 68.79 | 71.00 | b | 73.86 | a | 76.42 | 79.63 | 82.34 | b | 86.39 | 78.41 | a | 77.45 | 77.10 | a | 69.47 | a | 76.23 | ||||||
1987 | 66.43 | a | 68.11 | a | 67.71 | c | 75.37 | 72.61 | ----- | z | 76.30 | a | 79.00 | 81.20 | 78.47 | a | ----- | z | 61.83 | a | 72.70 | b | ||||
1988 | 66.80 | a | 72.25 | a | 73.87 | 72.20 | 75.07 | a | 74.77 | 80.39 | 79.81 | 78.07 | b | 75.68 | 69.50 | 65.61 | 73.67 | |||||||||
1989 | 65.81 | 64.64 | 69.10 | a | 75.38 | a | 71.97 | 75.79 | a | 81.47 | a | 79.32 | 82.97 | 75.74 | 75.30 | 71.48 | 74.08 | |||||||||
1990 | 67.84 | 64.39 | 66.68 | 71.03 | 73.25 | c | 80.89 | b | 84.03 | a | 80.03 | 82.28 | a | ----- | z | 74.27 | 66.77 | 73.77 | a | |||||||
1991 | 66.48 | 71.14 | 64.13 | 70.83 | 73.63 | a | 75.40 | 78.81 | 82.33 | a | 82.48 | a | 82.35 | 76.76 | a | 68.13 | 74.37 | |||||||||
1992 | 71.32 | 70.11 | a | 66.84 | 77.23 | 75.90 | 78.54 | b | 84.35 | 88.45 | 88.20 | 79.55 | 75.55 | a | 64.58 | 76.72 | ||||||||||
1993 | 64.19 | 65.79 | 72.71 | 75.20 | ----- | z | 79.25 | b | 78.77 | 82.00 | 82.73 | 80.07 | a | 74.10 | 69.58 | 74.94 | a | |||||||||
1994 | 72.77 | 66.14 | 70.89 | d | 71.07 | 71.07 | a | 80.90 | a | 80.53 | a | 87.68 | 83.93 | 77.39 | 68.03 | 67.23 | 74.80 | |||||||||
1995 | 63.52 | 72.07 | 69.13 | 72.10 | 69.97 | a | 75.37 | 82.94 | 86.06 | 84.77 | 79.30 | a | 76.43 | 68.71 | 75.03 | |||||||||||
1996 | 69.68 | 68.34 | 70.74 | 78.37 | 77.55 | b | 80.55 | a | 84.00 | 86.03 | 81.57 | 76.13 | 74.07 | 68.40 | a | 76.29 | ||||||||||
1997 | 65.48 | 68.64 | 74.83 | a | 73.77 | 81.19 | 77.17 | 80.35 | 83.63 | a | 87.00 | a | 79.30 | a | 73.31 | d | 67.77 | 76.04 | ||||||||
1998 | 65.93 | b | 62.85 | a | 68.07 | a | ----- | z | 69.45 | 75.63 | 86.47 | a | 91.42 | 83.57 | 80.19 | 73.60 | 69.10 | 75.12 | a | |||||||
1999 | 69.68 | 68.61 | 66.90 | 71.37 | 73.71 | 78.10 | a | 84.42 | 85.23 | 81.17 | 88.39 | 75.13 | 73.58 | 76.36 | ||||||||||||
2000 | 71.73 | a | 70.36 | a | 70.35 | 77.03 | 79.13 | 83.17 | a | 84.97 | 87.48 | 85.20 | 75.77 | 71.69 | a | 69.47 | a | 77.20 | ||||||||
2001 | 64.35 | 62.04 | a | 65.35 | 66.37 | 71.84 | 77.00 | a | 77.42 | 80.30 | a | 79.50 | 75.33 | a | 68.97 | 64.68 | 71.10 | |||||||||
2002 | 66.10 | b | 72.46 | b | 68.21 | c | 68.48 | c | 71.00 | a | 75.41 | a | 78.62 | b | 78.77 | e | 81.75 | b | 70.19 | 74.87 | 64.48 | 72.53 | ||||
2003 | 74.55 | b | 66.11 | a | 68.07 | a | 67.93 | c | 70.31 | b | 70.68 | b | 80.68 | 83.90 | a | 79.13 | 79.94 | 69.04 | b | 65.65 | 73.00 | |||||
2004 | 67.58 | 65.26 | b | 72.96 | c | 71.15 | c | 79.08 | e | 74.69 | d | 81.30 | d | 79.81 | d | 85.31 | d | 72.76 | f | 67.67 | f | 67.14 | b | 74.43 | b | |
2005 | 66.45 | 64.72 | c | 67.17 | a | 71.55 | a | 73.62 | b | 73.45 | a | 80.56 | d | 81.15 | e | 79.27 | 76.10 | a | 75.18 | b | 68.42 | e | 73.14 | |||
2006 | 68.59 | b | 70.52 | e | 62.57 | c | 67.72 | e | 71.93 | d | 81.04 | d | 87.62 | b | 81.44 | d | 82.27 | h | 74.96 | d | 75.62 | i | 68.21 | b | 73.46 | b |
2007 | 66.58 | 65.52 | e | 70.92 | e | 69.21 | b | 71.46 | e | 74.73 | d | 80.04 | d | 84.10 | 83.38 | i | 78.70 | h | 70.44 | c | 64.64 | i | 72.56 | c | ||
2008 | 63.32 | i | 66.29 | l | 71.84 | l | 76.00 | d | 72.36 | i | 81.52 | g | 81.47 | p | 83.50 | m | 82.96 | e | 85.19 | j | 76.74 | g | 64.86 | c | 74.61 | i |
2009 | 70.84 | f | 65.61 | 70.03 | 73.00 | g | 74.41 | b | 74.89 | c | 83.00 | 84.81 | e | 85.79 | a | 77.94 | 74.50 | d | 65.17 | a | 75.61 | b | ||||
2010 | 67.77 | e | 65.79 | 69.48 | 68.23 | 70.74 | 73.17 | 75.45 | 79.87 | 83.26 | k | 72.48 | h | 73.00 | e | 66.32 | f | 71.50 | c | |||||||
2011 | 69.29 | g | 65.73 | f | 69.39 | 74.45 | h | 75.95 | j | 77.60 | e | 81.77 | 80.68 | 80.46 | f | 76.90 | 70.12 | d | 65.90 | 74.62 | e | |||||
2012 | 72.42 | e | 68.70 | f | 67.97 | 71.77 | d | 72.35 | 74.79 | a | 78.74 | 85.32 | 87.70 | 79.87 | 71.60 | 64.61 | 75.20 | a | ||||||||
2013 | 67.16 | 67.71 | 69.97 | 72.10 | 75.39 | 75.33 | 77.65 | 79.10 | 80.67 | 73.74 | 71.83 | 70.32 | 73.41 | |||||||||||||
2014 | 73.45 | 69.00 | 70.26 | 72.50 | 77.94 | 75.23 | 80.77 | 81.45 | 83.60 | 80.58 | 75.53 | 67.19 | 75.63 | |||||||||||||
2015 | 70.65 | 72.04 | 76.13 | 72.70 | 68.45 | 76.80 | 78.13 | 82.77 | 84.47 | 81.48 | 72.43 | 65.65 | 75.14 | |||||||||||||
2016 | 64.58 | 76.17 | 68.42 | 71.87 | 68.48 | 77.57 | 81.29 | 80.26 | 79.87 | 77.61 | 76.17 | 66.48 | 74.06 | |||||||||||||
2017 | 62.71 | 63.89 | 71.45 | 73.27 | 70.58 | 76.10 | 80.97 | 80.77 | 80.70 | 81.65 | 74.67 | 74.29 | 74.25 | |||||||||||||
2018 | 72.42 | 67.64 | 66.13 | 71.43 | 69.16 | 74.40 | 83.81 | 83.68 | 78.70 | 76.87 | 74.43 | 66.26 | 73.74 | |||||||||||||
2019 | 65.87 | 59.79 | 65.65 | 70.13 | 67.35 | 73.47 | 79.68 | 81.13 | 80.83 | 80.16 | 72.17 | 64.39 | 71.72 | |||||||||||||
2020 | 66.48 | 67.83 | 63.52 | 68.23 | 74.29 | 75.83 | 81.61 | 83.52 | 85.57 | 81.97 | 72.70 | 70.06 | 74.30 | |||||||||||||
2021 | 68.52 | 67.46 | 65.39 | 70.73 | 70.32 | 74.83 | 78.81 | 80.74 | 79.43 | 74.81 | 75.20 | 62.06 | 72.36 | |||||||||||||
2022 | 68.94 | 71.68 | 70.00 | 72.27 | 70.65 | 77.73 | 78.06 | 82.84 | 84.30 | 75.65 | 69.47 | 64.55 | 73.84 | |||||||||||||
2023 | 61.74 | 62.61 | 60.87 | 65.90 | 66.45 | 70.73 | 81.45 | 81.65 | 77.53 | 78.55 | 76.10 | 70.45 | 71.17 | |||||||||||||
2024 | 67.00 | r | 63.34 | 65.54 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.44 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 67.43 | 67.67 | 68.06 | 70.90 | 72.44 | 76.18 | 81.14 | 82.77 | 82.05 | 78.04 | 72.59 | 67.39 | 74.17 | |||||||||||||
S.D. | 3.18 | 3.42 | 3.08 | 3.28 | 3.33 | 3.23 | 2.79 | 2.86 | 3.08 | 3.09 | 2.81 | 3.06 | 1.64 | |||||||||||||
SKEW | 0.50 | -0.05 | 0.29 | -0.17 | 0.65 | 0.22 | 0.49 | 0.67 | 0.56 | 0.46 | -0.06 | 0.38 | -0.09 | |||||||||||||
MAX | 74.55 | 76.17 | 76.13 | 78.37 | 81.19 | 83.43 | 88.33 | 91.42 | 90.21 | 88.39 | 78.07 | 74.61 | 77.20 | |||||||||||||
MIN | 61.74 | 59.79 | 60.87 | 61.93 | 66.45 | 69.28 | 75.45 | 78.35 | 77.10 | 70.19 | 67.66 | 60.29 | 70.91 | |||||||||||||
YRS | 57 | 58 | 60 | 58 | 58 | 59 | 61 | 61 | 58 | 55 | 58 | 60 | 41 |