YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.18 | 91.27 | 92.08 | 88.73 | 83.06 | 59.23 | 53.79 | 78.91 | e | |||||||
1953 | 60.48 | 57.52 | 63.56 | 67.65 | 71.37 | 84.57 | 91.82 | 90.03 | 88.38 | 73.90 | 65.77 | 55.42 | 72.54 | |||||||||||||
1954 | 55.60 | 66.61 | 60.52 | 75.25 | 78.87 | 84.75 | 90.63 | 88.37 | 86.87 | 78.80 | a | 68.53 | 58.52 | 74.44 | ||||||||||||
1955 | 50.10 | 54.57 | 63.90 | 68.45 | a | 74.98 | 85.00 | 87.65 | 87.62 | a | 86.80 | b | 80.60 | 64.02 | 60.15 | a | 71.99 | |||||||||
1956 | 60.45 | 53.60 | 66.94 | 67.93 | 78.27 | 87.77 | 88.47 | 89.48 | 90.95 | 74.40 | 65.84 | a | 59.21 | 73.61 | ||||||||||||
1957 | 53.94 | 64.54 | 64.13 | 68.78 | a | 73.16 | 88.83 | 94.27 | 89.55 | 87.35 | 71.73 | 59.05 | 60.37 | 72.97 | ||||||||||||
1958 | 58.24 | 61.09 | a | 57.66 | 69.47 | a | 83.34 | 87.50 | 92.08 | 90.33 | a | 86.05 | 79.45 | 64.72 | 64.58 | 74.54 | ||||||||||
1959 | 59.95 | 56.70 | 67.77 | 75.52 | 76.68 | 90.17 | 93.95 | 88.73 | 83.70 | 77.81 | 67.48 | 57.47 | 74.66 | |||||||||||||
1960 | 51.84 | 55.12 | 67.69 | 72.92 | 78.53 | 91.80 | 93.35 | 91.03 | a | 87.12 | 75.05 | a | 64.32 | 56.77 | 73.80 | |||||||||||
1961 | 60.66 | 61.54 | 62.90 | 71.62 | 75.97 | 89.83 | 91.47 | 89.29 | 82.25 | 74.24 | 59.87 | 55.02 | 72.89 | |||||||||||||
1962 | 55.42 | 56.79 | 57.89 | 76.08 | 73.98 | 85.20 | 91.35 | 93.42 | 85.75 | 76.06 | 67.92 | 59.10 | 73.25 | |||||||||||||
1963 | 52.61 | 66.21 | 62.60 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.47 | i | |||
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.22 | 80.26 | 59.69 | a | 56.11 | 69.82 | h | |||
1965 | 57.08 | 58.41 | 58.08 | 66.60 | 72.68 | 77.28 | 88.66 | 87.13 | 78.35 | 77.29 | 62.13 | 50.55 | 69.52 | |||||||||||||
1966 | 47.78 | a | 53.50 | 64.48 | 73.25 | 80.03 | 85.90 | 89.94 | 89.63 | 83.45 | 73.69 | 65.02 | h | ----- | z | 74.17 | b | |||||||||
1967 | 56.26 | 61.48 | 63.86 | m | 63.39 | h | 76.65 | 81.88 | 91.08 | 90.98 | 82.08 | 78.22 | a | 67.38 | a | 49.56 | f | 76.22 | c | |||||||
1968 | 57.62 | s | 62.89 | k | 64.35 | h | ----- | z | ----- | z | ----- | z | ----- | z | 84.85 | n | 86.48 | i | ----- | z | 62.11 | h | 50.95 | l | ----- | z |
1969 | ----- | z | 51.80 | r | ----- | z | 68.72 | g | 79.52 | a | 82.28 | ----- | z | 94.35 | d | 87.98 | b | 71.69 | 63.57 | 57.48 | 76.70 | e | ||||
1970 | 55.40 | a | 62.04 | 60.81 | 65.40 | 79.45 | ----- | z | 92.92 | 90.57 | c | ----- | z | 71.19 | b | 64.02 | c | 54.42 | 69.62 | b | ||||||
1971 | 56.06 | 59.05 | 66.21 | ----- | z | 72.13 | a | 84.85 | 92.66 | 87.32 | 85.02 | 68.98 | 62.02 | 51.29 | 71.42 | a | ||||||||||
1972 | 56.15 | a | 63.09 | 72.48 | 71.63 | 77.79 | 86.07 | 93.42 | 87.65 | 83.75 | 69.31 | 58.90 | 55.21 | 72.95 | ||||||||||||
1973 | ----- | z | ----- | z | 55.20 | d | 67.40 | ----- | z | 89.18 | 91.77 | 89.89 | 84.12 | a | 76.74 | 62.08 | 58.47 | 74.98 | c | |||||||
1974 | 53.13 | 58.21 | 63.90 | 70.83 | 77.95 | 91.53 | 89.85 | 89.84 | 85.43 | 75.17 | a | 64.02 | 52.98 | 72.74 | ||||||||||||
1975 | 55.37 | 57.12 | 59.71 | 61.05 | 75.55 | 84.88 | 90.65 | 90.85 | d | 86.07 | b | 74.34 | 64.88 | 57.55 | 71.50 | |||||||||||
1976 | 58.79 | 59.55 | 61.19 | 66.35 | 78.28 | h | ----- | z | 89.97 | 89.05 | 79.64 | a | 72.50 | a | 65.02 | 58.11 | c | 70.02 | b | |||||||
1977 | 54.66 | 63.84 | ----- | z | 71.08 | 70.34 | 88.72 | 92.05 | b | 89.33 | a | 84.17 | ----- | z | ----- | z | ----- | z | 76.77 | d | ||||||
1978 | 54.17 | a | 57.00 | 64.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.40 | i | ||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 87.94 | d | 88.20 | a | 91.55 | 76.95 | 60.82 | 57.02 | 77.08 | f | ||||
1980 | 54.82 | a | 59.86 | a | 58.15 | 67.60 | a | 73.16 | b | 89.00 | 96.12 | a | 91.97 | a | 86.62 | 77.27 | 65.05 | a | 61.66 | 73.44 | ||||||
1981 | 59.17 | a | 61.14 | 61.73 | 72.25 | 76.57 | a | 93.18 | 93.92 | 94.98 | 87.74 | a | 70.66 | 65.48 | a | 57.44 | 74.52 | |||||||||
1982 | 53.91 | b | 59.93 | 59.77 | a | 68.98 | 75.76 | 83.02 | 89.95 | 89.95 | 83.03 | 73.60 | b | 60.42 | 52.92 | 70.94 | ||||||||||
1983 | 57.31 | 57.27 | 60.35 | a | 63.66 | a | 78.21 | 84.05 | 91.50 | 86.19 | 85.33 | 74.18 | 61.87 | 56.37 | 71.36 | |||||||||||
1984 | 58.39 | 61.31 | e | 66.18 | a | 68.27 | 84.21 | 84.52 | 88.19 | 87.74 | 86.28 | 70.32 | a | 61.80 | 52.90 | 72.51 | ||||||||||
1985 | 53.24 | 55.71 | 60.82 | 74.45 | 79.11 | 89.42 | 92.11 | 91.50 | 78.87 | 73.80 | c | 59.39 | c | 57.35 | 72.15 | |||||||||||
1986 | 62.92 | 61.57 | 69.35 | 71.74 | a | 79.50 | 89.53 | 89.08 | 91.73 | 79.92 | 72.79 | 64.82 | 56.40 | a | 74.11 | |||||||||||
1987 | 54.44 | 58.09 | 61.79 | 75.80 | 77.71 | 88.23 | 89.23 | a | 89.69 | 84.78 | 78.39 | 61.95 | 51.55 | 72.64 | ||||||||||||
1988 | 54.97 | 61.91 | 65.73 | 69.22 | 77.37 | ----- | z | 92.18 | 89.03 | 84.62 | 80.31 | 63.53 | 55.77 | 72.24 | a | |||||||||||
1989 | 54.21 | 59.88 | 68.97 | 78.10 | 79.33 | a | 87.97 | 93.76 | 88.79 | 86.92 | 75.83 | a | 66.73 | 58.79 | b | 74.94 | ||||||||||
1990 | 55.05 | 56.07 | 65.52 | 72.27 | 76.06 | 89.90 | 91.11 | 87.35 | 84.68 | 77.27 | 65.80 | 53.24 | 72.86 | |||||||||||||
1991 | 55.82 | 66.16 | 57.32 | 69.22 | 75.26 | 83.27 | 90.08 | 90.23 | 85.72 | 79.74 | 64.70 | 56.50 | 72.83 | |||||||||||||
1992 | 56.97 | 60.71 | 60.68 | 73.90 | 79.71 | 86.22 | 90.44 | 90.18 | 88.18 | 77.42 | 62.21 | a | 52.11 | 73.23 | ||||||||||||
1993 | 54.71 | 55.50 | 65.05 | 72.78 | 79.61 | 86.87 | 88.50 | 89.61 | 85.80 | 76.21 | 61.63 | 57.06 | 72.78 | |||||||||||||
1994 | 59.27 | 56.61 | 65.39 | 71.03 | 75.50 | 90.37 | 91.77 | 92.65 | 87.22 | 73.48 | 57.88 | 55.97 | 73.09 | |||||||||||||
1995 | 54.44 | 64.36 | 63.89 | 68.12 | 73.16 | 84.72 | 93.21 | 94.18 | 88.97 | 78.84 | 70.30 | 59.81 | 74.50 | |||||||||||||
1996 | 59.34 | 63.31 | 65.66 | 74.45 | 80.77 | 89.07 | a | 94.02 | 91.68 | 83.47 | 75.11 | 66.28 | 58.10 | 75.10 | ||||||||||||
1997 | 57.00 | 58.91 | 70.84 | 69.75 | 84.89 | 84.25 | 90.98 | 91.68 | 86.80 | 73.97 | 65.45 | 53.02 | 73.96 | |||||||||||||
1998 | 56.42 | 53.02 | 60.82 | 65.23 | 72.89 | 82.70 | 92.92 | 93.29 | 85.37 | 74.16 | 64.57 | 55.77 | 71.43 | |||||||||||||
1999 | 59.76 | 61.07 | 63.56 | 64.20 | 77.19 | 85.35 | 89.21 | 90.89 | 87.48 | 81.26 | 70.43 | 58.53 | 74.08 | |||||||||||||
2000 | 61.05 | 60.84 | 63.69 | 74.83 | 83.37 | 88.95 | 92.82 | 91.76 | 88.12 | 72.58 | 58.42 | 60.16 | 74.72 | |||||||||||||
2001 | 53.97 | 56.05 | 64.92 | 68.82 | 85.45 | 89.38 | a | 90.97 | 91.29 | 90.12 | 78.47 | 67.88 | 54.40 | a | 74.31 | |||||||||||
2002 | 56.50 | 62.77 | 63.31 | 72.82 | 78.38 | a | 89.80 | 93.40 | 91.87 | 87.57 | 73.39 | 67.82 | 55.89 | 74.46 | ||||||||||||
2003 | 65.16 | 58.52 | 64.50 | 66.95 | 79.97 | 87.38 | 94.00 | 91.61 | 89.18 | 83.28 | a | 61.33 | 57.60 | 74.96 | ||||||||||||
2004 | 57.77 | 56.21 | 73.58 | 71.83 | 81.05 | 87.10 | 92.13 | 91.08 | 85.13 | 72.11 | 58.37 | 55.45 | 73.48 | |||||||||||||
2005 | 56.58 | 57.11 | 61.53 | 69.62 | 80.02 | 86.15 | 94.19 | 89.15 | ----- | z | 75.50 | 67.88 | 59.60 | 72.48 | a | |||||||||||
2006 | 58.89 | 63.27 | 59.76 | 69.48 | 81.77 | 91.70 | 93.58 | 90.56 | 84.32 | 73.85 | 68.45 | 57.19 | 74.40 | |||||||||||||
2007 | 54.37 | 60.62 | 68.82 | 71.42 | 80.16 | 88.47 | 92.03 | 92.19 | 85.48 | 76.35 | 70.17 | 53.00 | 74.42 | |||||||||||||
2008 | 54.00 | 59.14 | 66.65 | 72.66 | a | 75.92 | 90.62 | 91.90 | 91.06 | 88.63 | 78.98 | 69.08 | 55.27 | 74.49 | ||||||||||||
2009 | 60.89 | 59.23 | 65.82 | 69.95 | 84.02 | 83.75 | 94.92 | 92.56 | 88.62 | 73.10 | 68.00 | 54.98 | 74.65 | |||||||||||||
2010 | 58.16 | 58.20 | 61.92 | 67.07 | 75.23 | 86.78 | 93.34 | 90.13 | 89.28 | 74.97 | 63.13 | 60.47 | 73.22 | |||||||||||||
2011 | 58.11 | 55.34 | 66.39 | 71.47 | 75.05 | 87.07 | 91.85 | 95.34 | 89.08 | 79.03 | 62.25 | 53.45 | 73.70 | |||||||||||||
2012 | 60.65 | 60.19 | 64.92 | 73.08 | 82.31 | 89.28 | 90.90 | 91.65 | 86.42 | 78.02 | 68.97 | 56.60 | 75.25 | |||||||||||||
2013 | 54.85 | 56.62 | 69.89 | 73.33 | 79.76 | 91.05 | 91.69 | 90.87 | 84.22 | 72.82 | 65.57 | 56.84 | 73.96 | |||||||||||||
2014 | 63.39 | 64.45 | 68.58 | 72.50 | 80.08 | 89.25 | 92.13 | 87.48 | 87.32 | 79.76 | 66.90 | 57.77 | 75.80 | |||||||||||||
2015 | 60.02 | 66.27 | 71.60 | 71.65 | 73.39 | 89.82 | 89.66 | 94.03 | 88.70 | 78.15 | 62.57 | 55.68 | 75.13 | |||||||||||||
2016 | 56.34 | 67.62 | 69.40 | 71.93 | 75.95 | 91.88 | 94.00 | 91.35 | 84.50 | 80.11 | 68.53 | 58.24 | 75.82 | |||||||||||||
2017 | 54.65 | 61.07 | 70.26 | 73.88 | 79.10 | 91.33 | 93.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.88 | e | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 56.69 | 59.72 | 64.22 | 70.55 | 77.83 | 87.30 | 91.69 | 90.53 | 85.89 | 75.84 | 64.28 | 56.50 | 73.56 | |||||||||||||
S.D. | 3.19 | 3.55 | 4.08 | 3.41 | 3.50 | 3.11 | 1.91 | 2.02 | 2.78 | 3.31 | 3.37 | 2.74 | 1.31 | |||||||||||||
SKEW | 0.13 | 0.25 | 0.13 | -0.34 | 0.09 | -0.54 | -0.18 | 0.21 | -0.61 | 0.10 | -0.08 | 0.13 | -0.71 | |||||||||||||
MAX | 65.16 | 67.62 | 73.58 | 78.10 | 85.45 | 93.18 | 96.12 | 95.34 | 91.55 | 83.28 | 70.43 | 64.58 | 75.82 | |||||||||||||
MIN | 47.78 | 53.02 | 55.20 | 61.05 | 70.34 | 77.28 | 87.65 | 86.19 | 78.35 | 68.98 | 57.88 | 50.55 | 69.52 | |||||||||||||
YRS | 60 | 60 | 59 | 57 | 58 | 58 | 61 | 61 | 60 | 61 | 60 | 59 | 49 |