| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.16 | 73.87 | ----- | z | ----- | z | ----- | z | 80.01 | |||
| 1982 | 42.52 | 45.11 | 54.35 | 59.30 | 69.13 | 78.30 | 81.35 | 83.39 | 73.87 | 59.03 | 41.43 | 37.03 | 60.40 | |||||||||||||
| 1983 | 44.32 | 43.71 | 53.00 | 60.17 | 72.68 | 72.20 | 75.74 | 78.19 | 66.30 | 57.45 | 48.73 | 31.42 | 58.66 | |||||||||||||
| 1984 | 42.23 | 43.97 | 53.10 | 54.57 | 60.32 | 68.93 | 82.16 | 80.71 | 68.27 | 55.32 | 45.07 | 38.16 | 57.73 | |||||||||||||
| 1985 | 32.26 | 43.64 | 51.97 | 61.23 | 65.90 | 73.00 | 85.35 | 76.39 | 65.90 | 59.19 | 37.33 | 28.55 | 56.73 | |||||||||||||
| 1986 | 41.52 | 44.21 | 55.71 | 56.77 | 65.55 | 77.33 | 73.77 | 85.35 | 66.73 | 65.32 | 49.33 | 36.81 | 59.87 | |||||||||||||
| 1987 | 37.32 | 43.32 | 50.68 | 63.40 | 68.42 | 76.77 | 76.03 | 81.10 | a | 77.80 | 70.65 | 50.43 | 38.97 | 61.24 | ||||||||||||
| 1988 | 38.00 | 49.86 | 53.06 | 59.57 | 63.87 | 70.87 | 80.84 | 80.13 | 74.47 | 70.58 | 48.67 | 42.61 | 61.04 | |||||||||||||
| 1989 | 45.77 | 35.29 | 47.55 | 62.17 | 65.29 | 75.23 | 75.58 | 75.35 | 76.03 | 61.77 | 52.17 | 42.16 | 59.53 | |||||||||||||
| 1990 | 44.77 | 43.54 | 55.23 | 63.90 | 63.29 | 70.80 | 83.84 | 81.35 | 79.67 | 58.52 | 52.03 | 34.42 | 60.95 | |||||||||||||
| 1991 | 42.13 | 51.32 | 49.90 | 56.90 | 60.74 | 67.27 | 81.45 | 82.52 | 78.23 | 64.68 | 47.90 | 41.39 | 60.37 | |||||||||||||
| 1992 | 45.06 | 48.24 | 58.87 | 60.67 | 72.32 | 78.67 | 79.45 | 82.19 | 70.40 | 63.90 | 46.67 | 38.42 | 62.07 | |||||||||||||
| 1993 | 34.13 | 37.68 | 49.74 | 56.10 | 69.26 | 69.62 | a | 70.29 | 77.81 | 78.00 | 66.90 | 46.70 | 38.81 | 57.92 | ||||||||||||
| 1994 | 48.97 | 41.68 | 55.81 | 61.07 | 68.23 | 71.30 | 84.19 | 79.39 | 79.33 | 62.06 | 43.83 | 41.32 | 61.43 | |||||||||||||
| 1995 | 39.26 | 51.54 | 52.45 | 57.07 | 68.26 | 70.47 | 79.35 | 75.94 | 76.93 | 59.84 | 54.10 | 39.90 | 60.43 | |||||||||||||
| 1996 | 42.90 | 42.79 | 53.03 | 60.00 | 61.19 | 72.27 | 85.29 | 81.29 | 71.33 | 61.35 | 47.10 | 40.97 | 59.96 | |||||||||||||
| 1997 | 41.32 | 48.00 | 52.84 | 56.93 | 71.71 | 73.60 | 81.58 | 85.00 | 77.07 | 62.55 | 51.43 | 43.84 | 62.16 | |||||||||||||
| 1998 | 43.45 | 47.11 | ----- | z | ----- | z | 66.25 | z | 74.70 | 84.61 | 84.23 | 80.33 | 60.16 | 49.47 | 42.58 | 62.96 | ||||||||||
| 1999 | 47.29 | 45.43 | 51.26 | 59.07 | 63.13 | 70.47 | 79.42 | 80.74 | 76.20 | 63.90 | 50.47 | 44.26 | 60.97 | |||||||||||||
| 2000 | 39.39 | 44.59 | 51.52 | 63.60 | 65.16 | 75.13 | 78.90 | 79.87 | 73.33 | 60.29 | 42.13 | 36.26 | 59.18 | |||||||||||||
| 2001 | 39.45 | 45.41 | a | 54.32 | 57.77 | 71.84 | 69.73 | 77.52 | 81.29 | 76.60 | 62.03 | 49.60 | 40.52 | 60.51 | ||||||||||||
| 2002 | 42.35 | 49.64 | 50.84 | 60.83 | 64.84 | 74.47 | 83.90 | 79.97 | 75.10 | 63.90 | 48.17 | 40.13 | 61.18 | |||||||||||||
| 2003 | 42.45 | 49.43 | 54.32 | 56.43 | 67.81 | 78.47 | 85.35 | 82.68 | 77.83 | 65.90 | 45.77 | 39.48 | 62.16 | |||||||||||||
| 2004 | 37.23 | 46.28 | 59.29 | 65.13 | 66.29 | 76.07 | 83.23 | 82.00 | 71.13 | 63.06 | 51.37 | 43.97 | 62.09 | |||||||||||||
| 2005 | 42.58 | 50.93 | 58.77 | 58.40 | 67.29 | 68.90 | 80.58 | 81.55 | 73.43 | 61.58 | 46.47 | 35.84 | 60.53 | |||||||||||||
| 2006 | 43.71 | 44.32 | 51.19 | 60.07 | ----- | z | 74.10 | 83.74 | 79.97 | 76.63 | 63.65 | 46.40 | 38.42 | 60.20 | ||||||||||||
| 2007 | 39.03 | 46.07 | 57.06 | 58.70 | 69.26 | 72.20 | 82.84 | 78.65 | 73.07 | 59.32 | 48.73 | 40.87 | 60.48 | |||||||||||||
| 2008 | 39.32 | 49.93 | 50.84 | 54.70 | 66.35 | 72.23 | 82.58 | 79.77 | 76.43 | 61.94 | 51.33 | 40.84 | 60.52 | |||||||||||||
| 2009 | 42.81 | 42.14 | 47.19 | 57.43 | 68.74 | 74.23 | 83.48 | 81.06 | 77.27 | 58.42 | 49.00 | 34.87 | 59.72 | |||||||||||||
| 2010 | 43.19 | 46.57 | 53.97 | 56.07 | 61.71 | 69.82 | b | 80.03 | 79.29 | 68.23 | 58.81 | 43.47 | 35.35 | 58.04 | ||||||||||||
| 2011 | 43.26 | 43.39 | 44.94 | 49.57 | 59.52 | 68.10 | 75.06 | 80.17 | a | 76.87 | 57.94 | 46.23 | 41.23 | 57.19 | ||||||||||||
| 2012 | 40.55 | 42.48 | 46.55 | 56.07 | 62.03 | 67.37 | 79.13 | 82.65 | 77.07 | 59.03 | 45.10 | 38.29 | 58.03 | |||||||||||||
| 2013 | 35.65 | 46.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.04 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 41.38 | 45.44 | 52.65 | 58.79 | 66.21 | 72.66 | 80.54 | 80.82 | 74.49 | 61.91 | 47.63 | 38.96 | 60.04 | |||||||||||||
| S.D. | 3.63 | 3.70 | 3.53 | 3.28 | 3.74 | 3.31 | 3.78 | 2.55 | 4.04 | 3.57 | 3.58 | 3.60 | 1.53 | |||||||||||||
| SKEW | -0.45 | -0.47 | -0.08 | -0.34 | -0.04 | 0.22 | -0.81 | -0.06 | -0.76 | 0.70 | -0.73 | -0.90 | -0.56 | |||||||||||||
| MAX | 48.97 | 51.54 | 59.29 | 65.13 | 72.68 | 78.67 | 85.35 | 86.16 | 80.33 | 70.65 | 54.10 | 44.26 | 62.16 | |||||||||||||
| MIN | 32.26 | 35.29 | 44.94 | 49.57 | 59.52 | 67.27 | 70.29 | 75.35 | 65.90 | 55.32 | 37.33 | 28.55 | 56.73 | |||||||||||||
| NO YRS | 32 | 32 | 30 | 30 | 29 | 31 | 31 | 32 | 32 | 31 | 31 | 31 | 29 | |||||||||||||