| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.71 | 57.57 | 48.23 | 58.83 | ||||
| 1966 | 48.65 | 51.32 | 55.93 | a | 65.83 | 71.65 | ----- | z | 79.81 | 84.50 | a | 79.30 | 66.77 | 53.67 | 50.97 | 64.40 | ||||||||||
| 1967 | 50.97 | 54.57 | 55.16 | 57.07 | 70.87 | 79.00 | 86.10 | a | 91.97 | 83.37 | 66.87 | 55.19 | d | 47.10 | 66.52 | |||||||||||
| 1968 | 50.27 | a | 55.79 | 61.00 | 61.77 | 67.61 | c | 76.67 | 83.71 | 79.29 | 76.07 | 65.94 | 56.28 | a | 49.10 | 65.29 | ||||||||||
| 1969 | 45.81 | 49.75 | 61.32 | 62.40 | 73.13 | 74.80 | 80.16 | 81.06 | 78.13 | 64.30 | a | 54.47 | 50.23 | 64.63 | ||||||||||||
| 1970 | 50.58 | 55.57 | 58.52 | 59.07 | 69.27 | a | 79.43 | 85.74 | 85.03 | 74.97 | a | 66.35 | 56.47 | 48.35 | 65.78 | |||||||||||
| 1971 | 46.55 | 52.25 | 54.23 | 60.41 | a | 67.77 | 72.40 | 84.19 | 85.45 | 74.90 | 63.84 | 51.63 | 47.06 | 63.39 | ||||||||||||
| 1972 | 46.94 | 54.14 | 59.40 | a | 60.14 | a | 71.68 | 76.90 | 88.23 | 87.45 | 75.27 | 63.10 | 57.33 | 44.06 | 65.39 | |||||||||||
| 1973 | 48.10 | 57.00 | a | 55.55 | 65.27 | 72.90 | 77.93 | 86.97 | a | 84.31 | b | 78.07 | c | 66.61 | 50.77 | 52.45 | 66.33 | |||||||||
| 1974 | 46.16 | 50.96 | d | 56.81 | 61.93 | 67.48 | 77.80 | 83.77 | 86.32 | 87.43 | 70.71 | 57.57 | 50.23 | 66.43 | ||||||||||||
| 1975 | 50.97 | 52.29 | 52.90 | 57.37 | 70.90 | 75.07 | 84.19 | 79.68 | 83.37 | 64.97 | 52.97 | 49.42 | 64.51 | |||||||||||||
| 1976 | 51.03 | a | 53.48 | 55.87 | 61.13 | 72.00 | 73.27 | 83.65 | 79.91 | i | 77.33 | 69.87 | 57.60 | 43.80 | a | 63.55 | ||||||||||
| 1977 | 48.84 | 58.82 | 55.29 | 67.67 | 65.04 | c | 78.97 | 84.00 | c | 89.39 | 72.73 | 65.16 | 54.66 | a | 51.81 | 66.03 | ||||||||||
| 1978 | 53.55 | 54.79 | 61.81 | 60.38 | a | 68.84 | 78.68 | b | 84.00 | 82.58 | 72.83 | 70.58 | 50.40 | 45.84 | 65.36 | |||||||||||
| 1979 | 41.19 | 49.82 | 60.84 | 61.90 | 72.10 | 78.50 | 86.52 | 81.71 | 79.87 | 68.65 | 53.47 | 52.19 | 65.56 | |||||||||||||
| 1980 | 46.94 | 55.45 | 56.67 | a | 64.13 | 66.97 | a | 71.00 | 83.61 | 81.94 | 79.17 | 69.63 | a | 57.23 | 52.26 | 65.42 | ||||||||||
| 1981 | 52.39 | 56.04 | 58.81 | 63.20 | 67.61 | 75.53 | 82.52 | 87.10 | 79.90 | 62.84 | 54.90 | 50.87 | 65.97 | |||||||||||||
| 1982 | 46.48 | 53.54 | 55.87 | 61.13 | 70.71 | 76.50 | 79.39 | 83.74 | 75.17 | 64.68 | 51.87 | 46.62 | b | 63.81 | ||||||||||||
| 1983 | 51.52 | 53.75 | 58.26 | 61.77 | 70.16 | 73.67 | 76.10 | 80.61 | 73.17 | 66.42 | 55.47 | 45.84 | 63.89 | |||||||||||||
| 1984 | 49.45 | 52.21 | 60.10 | 59.77 | 67.68 | 72.50 | 83.94 | 82.87 | 77.73 | 62.19 | 52.10 | 45.39 | 63.83 | |||||||||||||
| 1985 | 44.42 | 49.29 | 53.90 | 65.83 | 70.10 | 78.97 | 89.10 | 82.55 | 72.17 | 66.03 | 46.90 | 41.68 | 63.41 | |||||||||||||
| 1986 | 52.47 | a | 53.57 | 62.52 | 62.17 | 68.97 | 80.30 | 79.35 | 88.87 | 71.77 | 66.90 | 54.86 | b | 47.29 | 65.75 | |||||||||||
| 1987 | 49.16 | 53.25 | 58.77 | 71.13 | 72.52 | 80.73 | 79.03 | 85.61 | 80.10 | 75.00 | 55.03 | 46.48 | 67.24 | |||||||||||||
| 1988 | 48.97 | a | 54.68 | a | 58.97 | 63.37 | 66.58 | 74.23 | 85.23 | 84.71 | 81.17 | 70.52 | 55.33 | 48.19 | 65.99 | |||||||||||
| 1989 | 48.97 | 44.79 | 55.90 | 68.47 | 67.19 | 77.63 | 78.03 | 79.77 | 80.93 | 67.45 | 56.93 | 47.74 | 64.48 | |||||||||||||
| 1990 | 50.90 | 51.68 | 62.06 | 68.03 | 69.55 | 76.87 | 89.58 | 85.84 | 82.83 | 68.55 | 56.37 | 43.00 | 67.11 | |||||||||||||
| 1991 | 47.84 | 59.96 | 56.23 | 61.60 | 65.71 | 74.13 | 88.77 | 87.16 | 87.20 | 74.87 | 58.80 | 49.13 | 67.62 | |||||||||||||
| 1992 | 53.10 | 61.24 | 64.58 | 68.23 | 80.94 | 81.90 | 85.52 | 89.94 | 82.30 | 70.81 | 57.17 | 47.23 | 70.24 | |||||||||||||
| 1993 | 46.19 | 49.96 | 63.35 | 60.90 | 71.42 | 74.50 | 78.00 | 82.48 | 84.73 | 72.03 | 52.13 | 47.81 | 65.29 | |||||||||||||
| 1994 | 52.68 | 51.89 | 63.65 | 66.70 | 73.97 | 76.77 | 90.23 | 85.87 | 83.33 | 68.13 | 50.03 | 51.35 | 67.88 | |||||||||||||
| 1995 | 50.71 | 61.93 | 59.97 | 62.60 | 73.61 | 77.53 | 86.58 | 84.97 | 83.43 | 68.61 | 59.73 | 52.81 | 68.54 | |||||||||||||
| 1996 | 50.52 | 54.83 | 61.81 | 65.90 | 69.06 | 78.23 | 91.39 | 90.16 | 78.83 | 67.71 | 57.17 | 50.77 | 68.03 | |||||||||||||
| 1997 | 52.48 | 56.07 | 60.52 | 64.83 | 78.87 | 76.70 | 85.06 | 88.27 | a | 80.33 | 64.29 | 58.00 | 49.10 | 67.88 | ||||||||||||
| 1998 | 53.00 | 54.96 | 60.16 | 64.93 | 64.06 | 77.70 | 89.26 | 89.35 | 84.80 | 66.90 | 56.27 | 47.32 | 67.39 | |||||||||||||
| 1999 | 50.74 | 52.79 | 56.00 | 63.60 | 68.42 | 77.23 | 85.77 | 84.84 | 85.93 | 72.47 | a | 60.57 | 47.68 | 67.17 | ||||||||||||
| 2000 | 48.45 | 54.66 | 57.77 | 67.57 | 71.74 | 82.53 | 84.42 | 86.90 | 80.97 | 68.81 | 50.70 | 49.90 | 67.04 | |||||||||||||
| 2001 | 51.07 | a | 51.93 | 61.40 | a | 62.63 | 78.10 | 75.55 | a | 85.84 | 87.23 | 83.87 | 69.68 | 58.25 | b | 48.70 | a | 67.85 | ||||||||
| 2002 | 50.16 | 57.68 | 57.74 | 66.13 | ----- | z | 81.67 | 90.77 | 89.26 | 84.47 | 68.74 | 57.83 | 52.94 | 68.85 | ||||||||||||
| 2003 | 54.84 | 55.50 | 60.94 | 60.03 | 75.42 | 86.16 | e | 91.90 | 91.16 | 86.53 | 72.35 | 53.13 | 50.48 | 69.87 | ||||||||||||
| 2004 | 51.58 | 54.34 | 66.58 | 70.53 | 74.29 | 80.07 | 90.94 | 89.68 | 77.60 | 67.39 | 55.47 | 50.55 | 69.08 | |||||||||||||
| 2005 | 50.97 | 56.86 | 64.39 | 66.05 | k | 71.87 | 74.30 | 89.48 | 92.16 | 80.13 | 69.10 | 51.93 | 49.03 | 68.20 | ||||||||||||
| 2006 | 51.35 | 56.61 | 55.19 | 65.50 | 75.06 | 79.07 | 89.35 | 87.77 | 82.94 | n | 70.45 | ----- | z | 50.90 | 68.13 | |||||||||||
| 2007 | ----- | z | 54.50 | 64.68 | 64.57 | 73.74 | 78.53 | 87.35 | 85.58 | 80.83 | 63.39 | 51.60 | 48.52 | 68.48 | ||||||||||||
| 2008 | 45.19 | 53.97 | 57.00 | 60.87 | 72.94 | 77.10 | 88.52 | 87.48 | 83.60 | 68.10 | 57.93 | 46.45 | 66.60 | |||||||||||||
| 2009 | 46.97 | 53.89 | 56.23 | 64.60 | 75.68 | 79.00 | 92.10 | 88.00 | 84.03 | 65.58 | 55.07 | 45.45 | 67.22 | |||||||||||||
| 2010 | 56.19 | 58.36 | 59.97 | 61.43 | 67.16 | 74.47 | 88.71 | 86.84 | 79.40 | 67.71 | 54.93 | 51.68 | 67.24 | |||||||||||||
| 2011 | 51.45 | 51.93 | 55.90 | a | 60.00 | 66.32 | 75.57 | 81.87 | 87.48 | 87.24 | a | 68.16 | 56.04 | b | 47.10 | 65.75 | ||||||||||
| 2012 | 52.06 | 53.86 | 55.68 | 65.40 | 72.06 | 75.37 | 83.74 | 90.06 | 85.67 | 71.52 | 58.43 | 48.77 | 67.72 | |||||||||||||
| 2013 | 46.35 | 53.29 | 61.14 | b | 64.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.00 | z | 53.59 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 49.68 | 54.16 | 58.90 | 63.48 | 70.86 | 77.20 | 85.37 | 85.98 | 80.28 | 67.95 | 55.07 | 48.54 | 66.35 | |||||||||||||
| S.D. | 2.93 | 3.12 | 3.27 | 3.25 | 3.66 | 2.93 | 4.03 | 3.34 | 4.37 | 3.00 | 2.90 | 2.64 | 1.67 | |||||||||||||
| SKEW | -0.42 | 0.00 | 0.30 | 0.32 | 0.53 | 0.44 | -0.34 | -0.21 | -0.25 | 0.23 | -0.54 | -0.40 | 0.14 | |||||||||||||
| MAX | 56.19 | 61.93 | 66.58 | 71.13 | 80.94 | 86.16 | 92.10 | 92.16 | 87.43 | 75.00 | 60.57 | 52.94 | 70.24 | |||||||||||||
| MIN | 41.19 | 44.79 | 52.90 | 57.07 | 64.06 | 71.00 | 76.10 | 79.29 | 71.77 | 62.19 | 46.90 | 41.68 | 63.39 | |||||||||||||
| NO YRS | 47 | 48 | 48 | 46 | 46 | 46 | 47 | 46 | 46 | 48 | 47 | 48 | 41 | |||||||||||||