| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1973 | ----- | z | ----- | z | 53.03 | 61.30 | 68.58 | 71.17 | 79.94 | 77.10 | 73.60 | 61.68 | 50.17 | 50.61 | 64.72 | |||||||||||
| 1974 | 44.29 | 46.96 | 54.90 | 58.27 | 62.77 | 72.10 | 75.81 | 79.87 | 81.63 | 66.97 | 53.70 | 49.00 | 62.19 | |||||||||||||
| 1975 | 49.19 | 49.71 | 51.94 | 54.23 | 65.32 | 70.47 | 77.58 | 74.23 | 78.57 | 59.97 | 51.70 | 49.16 | 61.01 | |||||||||||||
| 1976 | 47.84 | 49.69 | 52.16 | 57.47 | 67.48 | 69.30 | 77.77 | 75.65 | 75.07 | b | 66.42 | 54.57 | 44.29 | 61.48 | ||||||||||||
| 1977 | 48.23 | 53.89 | 51.68 | 63.89 | b | 60.26 | 74.23 | 76.45 | 83.35 | 69.53 | 63.90 | 52.17 | 48.42 | 62.17 | ||||||||||||
| 1978 | 47.13 | 52.54 | 59.42 | 57.83 | 63.77 | 73.97 | 78.97 | 77.65 | 68.17 | 66.68 | 49.40 | ----- | z | 63.23 | ||||||||||||
| 1979 | 37.55 | 48.00 | 58.42 | 58.33 | 68.13 | 74.40 | 80.68 | 77.32 | 76.48 | a | 67.13 | 51.20 | 50.90 | 62.38 | ||||||||||||
| 1980 | 45.50 | a | 53.41 | 53.06 | 62.13 | 64.06 | 66.77 | 77.71 | 76.42 | 75.00 | 67.19 | 54.93 | 49.00 | 62.10 | ||||||||||||
| 1981 | 46.48 | 49.93 | 56.68 | 59.73 | 64.67 | a | 69.67 | 77.87 | 83.19 | 76.97 | 61.97 | 55.97 | 47.87 | 62.58 | ||||||||||||
| 1982 | 42.87 | 50.43 | 54.58 | 57.73 | 67.23 | 73.07 | 76.06 | 78.58 | 71.70 | 64.19 | 50.00 | 46.35 | 61.07 | |||||||||||||
| 1983 | 49.42 | 53.18 | 56.58 | 60.73 | 68.87 | 68.50 | 72.26 | 77.61 | 71.77 | 63.10 | 54.03 | 41.42 | 61.46 | |||||||||||||
| 1984 | ----- | z | 53.00 | 57.97 | 56.53 | 64.61 | 69.03 | 80.42 | 79.35 | 75.07 | 57.03 | 51.53 | ----- | z | 64.46 | |||||||||||
| 1985 | 41.06 | 48.14 | 53.32 | 62.67 | 66.97 | 74.80 | 85.13 | 81.61 | 70.27 | 63.00 | 42.80 | 42.65 | 61.03 | |||||||||||||
| 1986 | 51.83 | a | 50.18 | 61.74 | 59.17 | 66.48 | 75.80 | 74.87 | 84.81 | 70.67 | 66.39 | 53.27 | ----- | z | 65.02 | |||||||||||
| 1987 | 47.29 | 52.86 | 57.16 | 66.03 | 69.10 | 79.53 | 74.74 | 81.81 | 77.47 | 71.94 | 52.52 | a | 42.33 | a | 64.40 | |||||||||||
| 1988 | 44.77 | 51.82 | a | 56.68 | 61.40 | 65.87 | 71.57 | 80.87 | 81.19 | 77.47 | 65.94 | 51.57 | 45.71 | 62.90 | ||||||||||||
| 1989 | 47.00 | 44.96 | 52.19 | 66.13 | 67.29 | 73.53 | 75.74 | 75.42 | 78.17 | 62.97 | 52.33 | 43.84 | 61.63 | |||||||||||||
| 1990 | 46.77 | 47.36 | 58.58 | 63.13 | 64.19 | 70.67 | 81.94 | 79.42 | 77.10 | 60.90 | 52.83 | 39.87 | 61.90 | |||||||||||||
| 1991 | 46.00 | 55.68 | 52.39 | 57.13 | 60.10 | 66.20 | 80.52 | 80.71 | 80.40 | 68.03 | 52.87 | ----- | z | 63.64 | ||||||||||||
| 1992 | 49.87 | 56.83 | 61.68 | 63.00 | 73.32 | 76.77 | 79.71 | 82.87 | 73.80 | 64.94 | 50.63 | 43.68 | 64.76 | |||||||||||||
| 1993 | 41.13 | 46.86 | 56.23 | 56.93 | 68.00 | 69.00 | 70.94 | 78.03 | 78.60 | 67.84 | 46.83 | 43.45 | 60.32 | |||||||||||||
| 1994 | 48.58 | 47.68 | 59.45 | 60.53 | 67.42 | 69.63 | 82.58 | 79.58 | 79.13 | 62.26 | 45.97 | 47.35 | 62.51 | |||||||||||||
| 1995 | 49.26 | 53.46 | 56.58 | 58.10 | 68.84 | 71.70 | 80.39 | 77.84 | 76.10 | 61.42 | 56.24 | a | 46.81 | 63.06 | ||||||||||||
| 1996 | 46.71 | 50.24 | 56.52 | 61.10 | 62.81 | 72.47 | 84.52 | 81.97 | 71.87 | 61.42 | 51.90 | 47.45 | 62.41 | |||||||||||||
| 1997 | 47.84 | 50.29 | 53.84 | 58.07 | 72.19 | 70.53 | 78.61 | 82.42 | 74.70 | 59.39 | 55.20 | 44.29 | 62.28 | |||||||||||||
| 1998 | 51.26 | 53.46 | 55.68 | 59.53 | 61.32 | 71.13 | 81.39 | 82.00 | 79.20 | 61.35 | 52.00 | 45.94 | 62.86 | |||||||||||||
| 1999 | 46.58 | 49.00 | 51.74 | 59.30 | 62.29 | 68.90 | 77.77 | 80.13 | 78.73 | 66.70 | a | 55.43 | 47.00 | 61.97 | ||||||||||||
| 2000 | 44.97 | 49.83 | 53.29 | 62.63 | 65.06 | 74.63 | 78.58 | 80.35 | 74.83 | 63.29 | 49.20 | 45.52 | 61.85 | |||||||||||||
| 2001 | 46.58 | 50.54 | 56.32 | 56.87 | 70.55 | 69.53 | 78.29 | 80.29 | 76.57 | 63.29 | 53.83 | 45.94 | 62.38 | |||||||||||||
| 2002 | 45.58 | 52.39 | 51.42 | 60.57 | 63.26 | 72.97 | 82.52 | 81.48 | 77.23 | 63.00 | 54.63 | 48.52 | 62.80 | |||||||||||||
| 2003 | 51.03 | 51.29 | 54.55 | 56.23 | 65.13 | 76.63 | 85.52 | 82.16 | 77.97 | 65.97 | 48.90 | 48.06 | 63.62 | |||||||||||||
| 2004 | 45.06 | 51.17 | 59.81 | 64.63 | 66.03 | 73.00 | 84.16 | 81.39 | 69.73 | 62.32 | 49.07 | 46.03 | 62.70 | |||||||||||||
| 2005 | 48.32 | 50.96 | 59.42 | 59.07 | 66.90 | 68.00 | 82.00 | 84.68 | 74.03 | 62.23 | 48.03 | 42.55 | 62.18 | |||||||||||||
| 2006 | 47.90 | 48.18 | 52.45 | 61.17 | 68.32 | 74.00 | 83.52 | 81.23 | 76.93 | 62.97 | 49.67 | 45.31 | b | 62.64 | ||||||||||||
| 2007 | 43.39 | 49.93 | 58.57 | a | 59.67 | 67.26 | 71.33 | 81.58 | 79.65 | 73.47 | 58.65 | 50.03 | 44.52 | 61.50 | ||||||||||||
| 2008 | 41.87 | 50.59 | 50.65 | 54.77 | 65.03 | 70.00 | 81.84 | 79.90 | 76.30 | 60.19 | 52.53 | 43.16 | 60.57 | |||||||||||||
| 2009 | 44.00 | 49.43 | 50.65 | 58.80 | 68.70 | a | 73.23 | 85.29 | 80.81 | 76.47 | 61.03 | 52.47 | 41.03 | 61.83 | ||||||||||||
| 2010 | 50.94 | 53.25 | 54.77 | 58.53 | 61.94 | 68.13 | 80.84 | 79.48 | 71.90 | 61.81 | 50.67 | 48.42 | 61.72 | |||||||||||||
| 2011 | 47.00 | 46.64 | 52.40 | a | 54.14 | a | 59.79 | b | 68.63 | 75.13 | 80.29 | 78.89 | b | 60.75 | c | 50.63 | 42.48 | d | 59.73 | |||||||
| 2012 | 46.65 | 49.61 | a | 50.70 | a | 59.24 | a | 64.85 | d | 68.76 | a | 76.97 | a | 82.63 | a | 77.71 | b | 65.17 | a | 52.60 | 46.10 | a | 61.75 | |||
| 2013 | 40.23 | 48.07 | 56.07 | a | 65.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.12 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 46.36 | 50.54 | 55.25 | 59.67 | 65.87 | 71.59 | 79.44 | 80.11 | 75.48 | 63.53 | 51.60 | 45.70 | 62.11 | |||||||||||||
| S.D. | 3.19 | 2.59 | 3.12 | 2.93 | 3.14 | 2.95 | 3.51 | 2.47 | 3.25 | 3.03 | 2.80 | 2.76 | 1.01 | |||||||||||||
| SKEW | -0.63 | 0.20 | 0.30 | 0.28 | 0.05 | 0.45 | -0.26 | -0.34 | -0.46 | 0.37 | -0.80 | -0.12 | 0.38 | |||||||||||||
| MAX | 51.83 | 56.83 | 61.74 | 66.13 | 73.32 | 79.53 | 85.52 | 84.81 | 81.63 | 71.94 | 56.24 | 50.90 | 64.76 | |||||||||||||
| MIN | 37.55 | 44.96 | 50.65 | 54.14 | 59.79 | 66.20 | 70.94 | 74.23 | 68.17 | 57.03 | 42.80 | 39.87 | 59.73 | |||||||||||||
| NO YRS | 39 | 40 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 36 | 35 | |||||||||||||