| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.65 | 72.63 | 62.77 | 48.17 | 37.58 | 59.76 | ||||||
| 1981 | 42.26 | 42.61 | 49.87 | 56.40 | 62.45 | 70.43 | 78.32 | 83.00 | 73.93 | 57.19 | 46.00 | 40.55 | 58.58 | |||||||||||||
| 1982 | 32.06 | 38.71 | 45.26 | 50.77 | 64.45 | 70.77 | 76.39 | 78.32 | 66.73 | 57.68 | 42.30 | 35.32 | 54.90 | |||||||||||||
| 1983 | 39.71 | 40.25 | 45.55 | 50.80 | 65.26 | 67.77 | 73.03 | 77.35 | 70.87 | 61.52 | 42.10 | 34.68 | 55.74 | |||||||||||||
| 1984 | 36.06 | 40.21 | 49.03 | 52.37 | 63.97 | 68.67 | 82.90 | 80.55 | 71.00 | 53.71 | 40.90 | 31.94 | 55.94 | |||||||||||||
| 1985 | 31.61 | 39.43 | 43.94 | ----- | z | 64.52 | 74.67 | 85.68 | 77.52 | 64.17 | 58.87 | a | 37.23 | 32.81 | 55.49 | |||||||||||
| 1986 | 41.23 | 44.21 | 55.03 | 56.00 | 64.55 | 77.63 | 76.68 | 84.65 | 64.23 | 63.45 | 48.60 | 38.48 | 59.56 | |||||||||||||
| 1987 | 35.65 | 42.75 | 48.94 | 65.87 | 69.35 | 77.50 | 75.68 | 84.58 | 79.30 | 72.19 | 48.17 | 36.03 | 61.33 | |||||||||||||
| 1988 | 32.07 | b | 45.36 | a | 51.42 | 59.83 | 63.23 | 72.17 | 84.55 | 84.68 | 76.17 | 73.42 | 43.00 | 35.77 | 60.14 | |||||||||||
| 1989 | 31.90 | 32.86 | 44.90 | 61.40 | 62.61 | 75.80 | 80.32 | 77.87 | 73.93 | 60.58 | 49.00 | 43.16 | 57.86 | |||||||||||||
| 1990 | 40.94 | 37.32 | 51.03 | 65.43 | 62.52 | 71.50 | 84.03 | 79.29 | 78.17 | 61.45 | 47.47 | 32.10 | 59.27 | |||||||||||||
| 1991 | 41.23 | 51.93 | 46.23 | 52.87 | 59.52 | 70.33 | 84.97 | 82.74 | 81.73 | 66.90 | 47.00 | 39.42 | 60.41 | |||||||||||||
| 1992 | 36.84 | 49.14 | 57.13 | 61.03 | 76.16 | 77.23 | 79.74 | 84.00 | 74.03 | 64.52 | 43.90 | 32.00 | 61.31 | |||||||||||||
| 1993 | 29.52 | 34.00 | 45.52 | 51.73 | 66.65 | 69.70 | 74.10 | 78.90 | 76.87 | 63.32 | 45.80 | 37.10 | 56.10 | |||||||||||||
| 1994 | 40.29 | 40.46 | 55.84 | 60.23 | 67.58 | 73.20 | 87.16 | 83.58 | 76.83 | 60.19 | 35.13 | 34.32 | 59.57 | |||||||||||||
| 1995 | 37.74 | 50.79 | 46.32 | 52.73 | 63.87 | 71.77 | 79.03 | 78.29 | 76.07 | 62.06 | 53.03 | 40.26 | 59.33 | |||||||||||||
| 1996 | 37.48 | 42.31 | 50.87 | 55.50 | 62.97 | 74.73 | 86.77 | 85.26 | 72.17 | 60.74 | 50.07 | 38.03 | 59.74 | |||||||||||||
| 1997 | 35.84 | 43.64 | 51.94 | 54.83 | 71.84 | 72.57 | 80.35 | 80.81 | 72.83 | 58.74 | 47.43 | 37.42 | 59.02 | |||||||||||||
| 1998 | 39.55 | 40.29 | 48.90 | 57.17 | 56.74 | 73.70 | 86.13 | 86.55 | 78.67 | 60.71 | 42.60 | 34.94 | 58.83 | |||||||||||||
| 1999 | 40.10 | 36.64 | 43.16 | 54.50 | 62.52 | 73.93 | 81.74 | 80.39 | 76.93 | 66.87 | 50.93 | 41.03 | 59.06 | |||||||||||||
| 2000 | 38.29 | 43.03 | 48.55 | 60.53 | 63.61 | 77.77 | 80.47 | a | 84.10 | 72.27 | 59.61 | 40.47 | 39.03 | 58.98 | ||||||||||||
| 2001 | 37.68 | 39.75 | 52.97 | 53.10 | 73.52 | 72.73 | 81.97 | 85.35 | 78.40 | 65.23 | 46.87 | 35.87 | 60.29 | |||||||||||||
| 2002 | 34.55 | 42.86 | 47.45 | 59.73 | 64.90 | a | 76.87 | 86.94 | 80.61 | 78.03 | 65.03 | 49.83 | 40.06 | 60.57 | ||||||||||||
| 2003 | 41.29 | 45.57 | 49.42 | 49.77 | 63.19 | 78.90 | 86.77 | 82.10 | 78.87 | 66.81 | 41.83 | 38.03 | 60.21 | |||||||||||||
| 2004 | 35.55 | 40.48 | 56.03 | 60.57 | 64.48 | 74.91 | g | ----- | z | 85.29 | ----- | z | 64.71 | 50.67 | 43.52 | 55.70 | ||||||||||
| 2005 | 39.60 | a | 47.96 | 54.81 | 54.80 | 65.35 | 69.27 | 88.13 | ----- | z | 76.10 | 64.03 | ----- | z | ----- | z | 62.23 | |||||||||
| 2006 | 39.32 | 43.07 | 44.68 | 56.23 | 69.74 | 80.77 | 91.29 | 85.32 | 78.90 | 66.79 | g | ----- | z | 39.00 | f | 65.48 | ||||||||||
| 2007 | 36.35 | e | 42.89 | 56.12 | e | 61.05 | i | 69.55 | 77.40 | ----- | z | ----- | z | 77.44 | e | 61.87 | h | 53.50 | 36.81 | 56.26 | ||||||
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | 68.68 | i | ----- | z | ----- | z | ----- | z | ----- | z | 64.61 | 51.60 | 39.77 | 52.00 | ||||
| 2009 | 43.03 | 43.36 | 46.68 | 56.23 | 67.77 | 72.00 | a | 85.90 | 82.45 | 81.13 | 61.32 | 47.43 | 37.16 | 60.37 | ||||||||||||
| 2010 | 41.71 | 44.75 | 50.74 | 51.60 | 58.16 | 70.93 | 84.87 | 82.42 | 75.13 | 64.55 | 44.77 | 39.94 | 59.13 | |||||||||||||
| 2011 | 40.94 | 42.93 | 44.39 | 50.80 | 58.39 | 70.55 | a | 79.23 | 84.26 | 81.43 | 63.77 | 45.10 | 46.87 | 59.05 | ||||||||||||
| 2012 | 44.06 | 44.86 | 45.84 | 56.67 | 66.61 | 70.70 | 83.73 | t | 88.12 | w | 82.70 | 65.13 | 48.90 | 39.35 | 56.48 | |||||||||||
| 2013 | 33.65 | 43.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.32 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 37.75 | 42.42 | 49.31 | 56.19 | 65.03 | 73.40 | 82.26 | 82.00 | 75.41 | 62.96 | 46.12 | 37.72 | 59.01 | |||||||||||||
| S.D. | 3.75 | 4.20 | 4.12 | 4.37 | 4.30 | 3.39 | 4.63 | 2.89 | 4.67 | 4.05 | 4.40 | 3.48 | 1.70 | |||||||||||||
| SKEW | -0.43 | 0.03 | 0.40 | 0.51 | 0.50 | 0.38 | -0.23 | -0.26 | -0.81 | 0.40 | -0.53 | 0.35 | -1.05 | |||||||||||||
| MAX | 44.06 | 51.93 | 57.13 | 65.87 | 76.16 | 80.77 | 91.29 | 86.55 | 82.70 | 73.42 | 53.50 | 46.87 | 61.33 | |||||||||||||
| MIN | 29.52 | 32.86 | 43.16 | 49.77 | 56.74 | 67.77 | 73.03 | 77.35 | 64.17 | 53.71 | 35.13 | 31.94 | 54.90 | |||||||||||||
| NO YRS | 32 | 32 | 31 | 29 | 31 | 30 | 28 | 29 | 31 | 31 | 31 | 31 | 25 | |||||||||||||